Files
el/el-compiler/runtime/el_runtime.c
T
Will Anderson 12d5e7777e runtime + compiler: dharma, match, cgi blocks, VBD, agentic LLM
Two parallel agent sweeps closing the remaining structural gaps.

== Compiler completions ==

- match codegen: lowers Match into GCC/Clang statement-expression
  ({ ... }). Patterns: Wildcard, Binding, LitInt (==), LitStr
  (str_eq), LitBool. Per-match unique label via state counter.
  Verified: classify(0)→"zero", classify(1)→"one", classify(7)→"other".

- cgi block parsing: `cgi "name" { dharma_id, principal, network,
  engram }` → CgiBlock AST node → el_cgi_init() emitted as the first
  call in main() after el_runtime_init_args. Multiple cgi blocks per
  program emit a #error directive. Missing optional fields → EL_NULL.

- VBD compile-time enforcement: parser attaches `decorator: <name>`
  to FnDef. Codegen recursively walks fn bodies (Call/BinOp/Not/Neg/
  Field/Index/Try/Array/Map/If/For/Match plus Let/Return/Expr/While/
  For). If a non-@manager function calls dharma_emit or dharma_field,
  emit `#error "VBD violation: ... fn '<name>'"` before the function
  body. Verified: @engine fn calling dharma_emit → cc fails with the
  message. @manager fn calling dharma_emit → compiles clean.

Three-stage closure: stage1.c == stage2.c == stage3.c (2791 lines
each, byte-identical). dist/platform/elc rebuilt at 165 KB; .prev5
preserved.

== Runtime completions ==

- Real dharma_* primitives, no more stubs. Channel registry,
  request/response over HTTP, network-wide spreading activation,
  fire-and-forget event emission, blocking dharma_field with
  pthread_cond_timedwait (30s default), Hebbian relationship
  weights stored as Engram edges between dharma:self and
  dharma:peer:<id>, sorted-by-weight peer list. URL/ID arrays
  snapshotted before network I/O so mutexes never block on socket.

- New public C contract: el_runtime_dharma_event_arrive(type, payload,
  source) — application HTTP handler calls this when /dharma/event
  arrives, runtime broadcasts on _dharma_event_cv. Keeps the HTTP
  server generic; events flow through the application's router.

- llm_call_agentic real multi-turn loop. Tool registry (mutex-
  protected, dlsym-resolved, mirroring http_set_handler). Loop:
  build request with tools+messages → POST → dispatch on stop_reason.
  end_turn → return text. max_tokens → text + "[truncated]". tool_use
  → walk content[], call registered handler per block, build
  tool_result message, append to conversation, loop. Iteration cap
  10. Tools not registered return {"error":"tool not registered: X"}
  with is_error: true.

- New builtin: llm_register_tool(name, handler_fn_name).

Compile clean: cc -std=c11 -Wall -Wextra -c → zero warnings, zero
errors. Smoke test exercises every new dharma_* primitive +
llm_register_tool round-trip.

Runtime grew 3309→4079 lines (.c, ~155 KB), 312→342 lines (.h).

== Integration ==

Engram rebuilt against the new runtime: 130 KB binary, daemon
swapped on :8742 cleanly, /health and /api/stats both returning
correctly under launchd. No regressions.

== Status of "planned" items in language.md ==

- match codegen → IMPLEMENTED
- cgi block parsing → IMPLEMENTED
- VBD enforcement → IMPLEMENTED
- % operator → IMPLEMENTED (earlier today)
- vessel keyword → lexed (codegen uses package compatible)
- activate construct → still planned (low priority; engram_activate
  builtin covers the use case for now)
- sealed block → still planned
- dharma_emit fanout parallelization → potential future work, current
  serial behavior matches spec
2026-04-30 14:06:19 -05:00

4080 lines
152 KiB
C

/*
* el_runtime.c — El language C runtime implementation
*
* All functions use el_val_t (= int64_t) as the universal value type.
* Strings are transported as their pointer address cast to int64_t.
* On any 64-bit system sizeof(pointer) <= sizeof(int64_t), so this is safe.
*
* Compile with:
* cc -std=c11 -I<runtime-dir> -lcurl -lpthread -o <prog> <prog>.c el_runtime.c
*
* Link requirements: -lcurl (HTTP client + LLM), -lpthread (HTTP server).
*/
#include "el_runtime.h"
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <math.h>
#include <time.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <dlfcn.h> /* dlsym for http_set_handler fallback */
#include <unistd.h>
#include <dirent.h>
#include <errno.h>
#include <pthread.h>
#include <curl/curl.h>
/* ── Internal allocators ─────────────────────────────────────────────────── */
static char* el_strdup(const char* s) {
if (!s) return strdup("");
return strdup(s);
}
static char* el_strbuf(size_t n) {
char* p = malloc(n + 1);
if (!p) { fputs("el_runtime: out of memory\n", stderr); exit(1); }
p[0] = '\0';
return p;
}
/* Wrap an allocated C string as el_val_t */
static el_val_t el_wrap_str(char* s) {
return EL_STR(s);
}
/* ── I/O ──────────────────────────────────────────────────────────────────── */
void println(el_val_t s) {
const char* str = EL_CSTR(s);
if (str) puts(str);
else puts("");
}
void print(el_val_t s) {
const char* str = EL_CSTR(s);
if (str) fputs(str, stdout);
}
el_val_t readline(void) {
char buf[4096];
if (!fgets(buf, sizeof(buf), stdin)) return el_wrap_str(el_strdup(""));
size_t len = strlen(buf);
if (len > 0 && buf[len - 1] == '\n') buf[len - 1] = '\0';
return el_wrap_str(el_strdup(buf));
}
/* ── String builtins ─────────────────────────────────────────────────────── */
el_val_t el_str_concat(el_val_t av, el_val_t bv) {
const char* a = EL_CSTR(av);
const char* b = EL_CSTR(bv);
if (!a) a = "";
if (!b) b = "";
size_t la = strlen(a);
size_t lb = strlen(b);
char* out = el_strbuf(la + lb);
memcpy(out, a, la);
memcpy(out + la, b, lb);
out[la + lb] = '\0';
return el_wrap_str(out);
}
el_val_t str_eq(el_val_t av, el_val_t bv) {
const char* a = EL_CSTR(av);
const char* b = EL_CSTR(bv);
if (!a || !b) return (el_val_t)(a == b);
return (el_val_t)(strcmp(a, b) == 0);
}
el_val_t str_starts_with(el_val_t sv, el_val_t prefv) {
const char* s = EL_CSTR(sv);
const char* prefix = EL_CSTR(prefv);
if (!s || !prefix) return 0;
size_t lp = strlen(prefix);
return (el_val_t)(strncmp(s, prefix, lp) == 0);
}
el_val_t str_ends_with(el_val_t sv, el_val_t sufv) {
const char* s = EL_CSTR(sv);
const char* suffix = EL_CSTR(sufv);
if (!s || !suffix) return 0;
size_t ls = strlen(s);
size_t lsuf = strlen(suffix);
if (lsuf > ls) return 0;
return (el_val_t)(strcmp(s + ls - lsuf, suffix) == 0);
}
el_val_t str_len(el_val_t sv) {
const char* s = EL_CSTR(sv);
if (!s) return 0;
return (el_val_t)strlen(s);
}
el_val_t str_concat(el_val_t a, el_val_t b) {
return el_str_concat(a, b);
}
el_val_t int_to_str(el_val_t n) {
char buf[32];
snprintf(buf, sizeof(buf), "%lld", (long long)n);
return el_wrap_str(el_strdup(buf));
}
el_val_t str_to_int(el_val_t sv) {
const char* s = EL_CSTR(sv);
if (!s) return 0;
return (el_val_t)atoll(s);
}
el_val_t str_slice(el_val_t sv, el_val_t start, el_val_t end) {
const char* s = EL_CSTR(sv);
if (!s) return el_wrap_str(el_strdup(""));
int64_t len = (int64_t)strlen(s);
if (start < 0) start = 0;
if (end > len) end = len;
if (start >= end) return el_wrap_str(el_strdup(""));
int64_t sz = end - start;
char* out = el_strbuf((size_t)sz);
memcpy(out, s + start, (size_t)sz);
out[sz] = '\0';
return el_wrap_str(out);
}
el_val_t str_contains(el_val_t sv, el_val_t subv) {
const char* s = EL_CSTR(sv);
const char* sub = EL_CSTR(subv);
if (!s || !sub) return 0;
return (el_val_t)(strstr(s, sub) != NULL);
}
el_val_t str_replace(el_val_t sv, el_val_t fromv, el_val_t tov) {
const char* s = EL_CSTR(sv);
const char* from = EL_CSTR(fromv);
const char* to = EL_CSTR(tov);
if (!s || !from || !to) return el_wrap_str(el_strdup(s ? s : ""));
size_t ls = strlen(s);
size_t lf = strlen(from);
size_t lt = strlen(to);
if (lf == 0) return el_wrap_str(el_strdup(s));
size_t count = 0;
const char* p = s;
while ((p = strstr(p, from)) != NULL) { count++; p += lf; }
size_t out_sz = ls + count * lt + 1;
char* out = el_strbuf(out_sz);
char* dst = out;
p = s;
const char* found;
while ((found = strstr(p, from)) != NULL) {
size_t chunk = (size_t)(found - p);
memcpy(dst, p, chunk); dst += chunk;
memcpy(dst, to, lt); dst += lt;
p = found + lf;
}
strcpy(dst, p);
return el_wrap_str(out);
}
el_val_t str_to_upper(el_val_t sv) {
const char* s = EL_CSTR(sv);
if (!s) return el_wrap_str(el_strdup(""));
size_t n = strlen(s);
char* out = el_strbuf(n);
for (size_t i = 0; i < n; i++) out[i] = (char)toupper((unsigned char)s[i]);
out[n] = '\0';
return el_wrap_str(out);
}
el_val_t str_to_lower(el_val_t sv) {
const char* s = EL_CSTR(sv);
if (!s) return el_wrap_str(el_strdup(""));
size_t n = strlen(s);
char* out = el_strbuf(n);
for (size_t i = 0; i < n; i++) out[i] = (char)tolower((unsigned char)s[i]);
out[n] = '\0';
return el_wrap_str(out);
}
el_val_t str_trim(el_val_t sv) {
const char* s = EL_CSTR(sv);
if (!s) return el_wrap_str(el_strdup(""));
while (*s && isspace((unsigned char)*s)) s++;
size_t n = strlen(s);
while (n > 0 && isspace((unsigned char)s[n - 1])) n--;
char* out = el_strbuf(n);
memcpy(out, s, n);
out[n] = '\0';
return el_wrap_str(out);
}
/* ── Math ────────────────────────────────────────────────────────────────── */
el_val_t el_abs(el_val_t n) { return n < 0 ? -n : n; }
el_val_t el_max(el_val_t a, el_val_t b) { return a > b ? a : b; }
el_val_t el_min(el_val_t a, el_val_t b) { return a < b ? a : b; }
/* ── List ────────────────────────────────────────────────────────────────── */
/*
* Dynamic array header:
* int64_t capacity
* int64_t length
* el_val_t elems[]
*/
typedef struct {
int64_t capacity;
int64_t length;
el_val_t elems[1];
} ElList;
static ElList* list_alloc(int64_t cap) {
ElList* lst = malloc(sizeof(ElList) + (size_t)(cap > 1 ? cap - 1 : 0) * sizeof(el_val_t));
if (!lst) { fputs("el_runtime: out of memory\n", stderr); exit(1); }
lst->capacity = cap;
lst->length = 0;
return lst;
}
el_val_t el_list_empty(void) {
return EL_STR(list_alloc(4));
}
el_val_t el_list_new(el_val_t count, ...) {
ElList* lst = list_alloc(count > 0 ? count : 4);
va_list ap;
va_start(ap, count);
for (int64_t i = 0; i < count; i++) {
lst->elems[i] = va_arg(ap, el_val_t);
}
va_end(ap);
lst->length = count;
return EL_STR(lst);
}
el_val_t el_list_len(el_val_t listv) {
ElList* lst = (ElList*)(uintptr_t)listv;
if (!lst) return 0;
return lst->length;
}
el_val_t el_list_get(el_val_t listv, el_val_t index) {
ElList* lst = (ElList*)(uintptr_t)listv;
if (!lst) return 0;
if (index < 0 || index >= lst->length) return 0;
return lst->elems[index];
}
el_val_t el_list_append(el_val_t listv, el_val_t elem) {
/* Always allocate a fresh list rather than realloc'ing the input.
* El callers commonly hold a stale pointer to the original list (e.g.
* cg_if_stmt passes `declared` to two successive cg_stmts calls; the
* first call may realloc the underlying block, leaving the second
* with a dangling pointer). Persistent allocation eliminates that
* whole class of use-after-free at modest memory cost. */
ElList* old = (ElList*)(uintptr_t)listv;
int64_t old_len = old ? old->length : 0;
int64_t new_cap = old_len + 1;
if (new_cap < 4) new_cap = 4;
ElList* new_lst = malloc(sizeof(ElList) + (size_t)(new_cap - 1) * sizeof(el_val_t));
if (!new_lst) { fputs("el_runtime: out of memory\n", stderr); exit(1); }
new_lst->capacity = new_cap;
new_lst->length = old_len + 1;
if (old && old_len > 0) {
memcpy(new_lst->elems, old->elems, (size_t)old_len * sizeof(el_val_t));
}
new_lst->elems[old_len] = elem;
return EL_STR(new_lst);
}
/* ── Map ─────────────────────────────────────────────────────────────────── */
typedef struct {
int64_t count;
el_val_t* keys;
el_val_t* values;
} ElMap;
el_val_t el_map_new(el_val_t pair_count, ...) {
ElMap* m = malloc(sizeof(ElMap));
if (!m) { fputs("el_runtime: out of memory\n", stderr); exit(1); }
m->count = pair_count;
m->keys = malloc(sizeof(el_val_t) * (size_t)(pair_count > 0 ? pair_count : 1));
m->values = malloc(sizeof(el_val_t) * (size_t)(pair_count > 0 ? pair_count : 1));
va_list ap;
va_start(ap, pair_count);
for (int64_t i = 0; i < pair_count; i++) {
m->keys[i] = va_arg(ap, el_val_t);
m->values[i] = va_arg(ap, el_val_t);
}
va_end(ap);
return EL_STR(m);
}
static ElMap* as_map(el_val_t v) { return (ElMap*)(uintptr_t)v; }
el_val_t el_map_get(el_val_t mapv, el_val_t keyv) {
ElMap* m = as_map(mapv);
const char* key = EL_CSTR(keyv);
if (!m || !key) return 0;
for (int64_t i = 0; i < m->count; i++) {
const char* k = EL_CSTR(m->keys[i]);
if (k && strcmp(k, key) == 0) return m->values[i];
}
return 0;
}
el_val_t el_get_field(el_val_t mapv, el_val_t keyv) {
return el_map_get(mapv, keyv);
}
el_val_t el_map_set(el_val_t mapv, el_val_t keyv, el_val_t value) {
ElMap* m = as_map(mapv);
const char* key = EL_CSTR(keyv);
if (!m) return 0;
for (int64_t i = 0; i < m->count; i++) {
const char* k = EL_CSTR(m->keys[i]);
if (k && strcmp(k, key) == 0) { m->values[i] = value; return mapv; }
}
int64_t nc = m->count + 1;
m->keys = realloc(m->keys, sizeof(el_val_t) * (size_t)nc);
m->values = realloc(m->values, sizeof(el_val_t) * (size_t)nc);
m->keys[m->count] = keyv;
m->values[m->count] = value;
m->count = nc;
return mapv;
}
/* ── Batch 2/3 forward decls (defined later in JSON section) ────────────── */
typedef struct JsonBuf JsonBuf;
typedef struct JsonParser JsonParser;
static void jb_init(JsonBuf* b);
static void jb_putc(JsonBuf* b, char c);
static void jb_puts(JsonBuf* b, const char* s);
static void jb_emit_escaped(JsonBuf* b, const char* s);
static int looks_like_string(el_val_t v);
static const char* json_find_key(const char* s, const char* key);
static const char* json_skip_value(const char* p);
static char* jp_parse_string_raw(JsonParser* jp);
/* Struct definitions are visible here because batch 2/3 helpers above use
* them by value; the bodies (jb_init, etc.) appear in the JSON section. */
struct JsonBuf {
char* buf;
size_t len;
size_t cap;
};
struct JsonParser {
const char* p;
const char* end;
int err;
};
/* ── Batch 2: Real HTTP (libcurl client + POSIX-socket server) ───────────── */
/*
* Client: blocking libcurl easy-handle calls. Errors are returned as a JSON
* fragment {"error":"..."} so callers can detect via str_starts_with("{") /
* json_get_string("error", ...).
*
* Server: bind/listen/accept loop on a TCP socket. Each accepted connection
* is handled in its own pthread (detached). A semaphore-style counter caps
* concurrent in-flight connections at HTTP_MAX_CONNS (64). When the cap is
* reached, accept() blocks until a worker exits. This prevents runaway
* thread creation under high load.
*
* Handler dispatch: El does not expose first-class function references at
* the runtime layer, so the second argument to http_serve(port, handler) is
* treated as a string name (or any el_val_t — the runtime ignores its
* value and uses the registry). Callers register a C-level handler via
*
* extern void el_runtime_register_handler(const char* name,
* el_val_t (*fn)(el_val_t,
* el_val_t,
* el_val_t));
*
* and select the active handler by calling http_set_handler("name") from
* El, or by setting it directly through the C registry. If no handler is
* registered, the server replies with a 200 carrying a default message so
* the loop is observable.
*/
/* ── HTTP client write-callback buffer ───────────────────────────────────── */
typedef struct {
char* data;
size_t len;
size_t cap;
} HttpBuf;
static void httpbuf_init(HttpBuf* b) {
b->cap = 1024;
b->len = 0;
b->data = malloc(b->cap);
if (!b->data) { fputs("el_runtime: out of memory\n", stderr); exit(1); }
b->data[0] = '\0';
}
static void httpbuf_append(HttpBuf* b, const void* src, size_t n) {
if (b->len + n + 1 > b->cap) {
while (b->len + n + 1 > b->cap) b->cap *= 2;
b->data = realloc(b->data, b->cap);
if (!b->data) { fputs("el_runtime: out of memory\n", stderr); exit(1); }
}
memcpy(b->data + b->len, src, n);
b->len += n;
b->data[b->len] = '\0';
}
static size_t http_write_cb(char* ptr, size_t size, size_t nmemb, void* ud) {
size_t n = size * nmemb;
httpbuf_append((HttpBuf*)ud, ptr, n);
return n;
}
/* JSON-escape an arbitrary C string into an allocated buffer. */
static char* json_escape_alloc(const char* s) {
if (!s) return el_strdup("");
JsonBuf b; jb_init(&b);
for (const char* p = s; *p; p++) {
unsigned char c = (unsigned char)*p;
switch (c) {
case '"': jb_puts(&b, "\\\""); break;
case '\\': jb_puts(&b, "\\\\"); break;
case '\n': jb_puts(&b, "\\n"); break;
case '\r': jb_puts(&b, "\\r"); break;
case '\t': jb_puts(&b, "\\t"); break;
default:
if (c < 0x20) {
char tmp[8]; snprintf(tmp, sizeof(tmp), "\\u%04x", c);
jb_puts(&b, tmp);
} else jb_putc(&b, (char)c);
}
}
return b.buf;
}
static el_val_t http_error_json(const char* msg) {
char* esc = json_escape_alloc(msg ? msg : "unknown error");
char* buf = el_strbuf(strlen(esc) + 16);
sprintf(buf, "{\"error\":\"%s\"}", esc);
free(esc);
return el_wrap_str(buf);
}
/* Internal: do a libcurl request; takes optional body/headers. */
static el_val_t http_do(const char* method, const char* url, const char* body,
struct curl_slist* extra_headers) {
if (!url || !*url) return http_error_json("empty url");
CURL* c = curl_easy_init();
if (!c) return http_error_json("curl_easy_init failed");
HttpBuf rb; httpbuf_init(&rb);
char errbuf[CURL_ERROR_SIZE]; errbuf[0] = '\0';
curl_easy_setopt(c, CURLOPT_URL, url);
curl_easy_setopt(c, CURLOPT_WRITEFUNCTION, http_write_cb);
curl_easy_setopt(c, CURLOPT_WRITEDATA, &rb);
curl_easy_setopt(c, CURLOPT_FOLLOWLOCATION, 1L);
curl_easy_setopt(c, CURLOPT_TIMEOUT, 60L);
curl_easy_setopt(c, CURLOPT_NOSIGNAL, 1L);
curl_easy_setopt(c, CURLOPT_ERRORBUFFER, errbuf);
curl_easy_setopt(c, CURLOPT_USERAGENT, "el-runtime/1.0");
if (extra_headers) curl_easy_setopt(c, CURLOPT_HTTPHEADER, extra_headers);
if (method && strcmp(method, "POST") == 0) {
curl_easy_setopt(c, CURLOPT_POST, 1L);
curl_easy_setopt(c, CURLOPT_POSTFIELDS, body ? body : "");
curl_easy_setopt(c, CURLOPT_POSTFIELDSIZE, (long)(body ? strlen(body) : 0));
}
CURLcode rc = curl_easy_perform(c);
curl_easy_cleanup(c);
if (rc != CURLE_OK) {
free(rb.data);
const char* m = errbuf[0] ? errbuf : curl_easy_strerror(rc);
return http_error_json(m);
}
return el_wrap_str(rb.data);
}
el_val_t http_get(el_val_t url) {
return http_do("GET", EL_CSTR(url), NULL, NULL);
}
el_val_t http_post(el_val_t url, el_val_t body) {
return http_do("POST", EL_CSTR(url), EL_CSTR(body), NULL);
}
el_val_t http_post_json(el_val_t url, el_val_t json_body) {
struct curl_slist* h = NULL;
h = curl_slist_append(h, "Content-Type: application/json");
el_val_t r = http_do("POST", EL_CSTR(url), EL_CSTR(json_body), h);
curl_slist_free_all(h);
return r;
}
/* Build a curl_slist from an ElMap of name -> value strings. */
static struct curl_slist* headers_from_map(el_val_t headers_map) {
struct curl_slist* h = NULL;
ElMap* m = as_map(headers_map);
if (!m) return NULL;
for (int64_t i = 0; i < m->count; i++) {
const char* k = EL_CSTR(m->keys[i]);
const char* v = EL_CSTR(m->values[i]);
if (!k || !v) continue;
size_t n = strlen(k) + strlen(v) + 4;
char* line = malloc(n);
if (!line) continue;
snprintf(line, n, "%s: %s", k, v);
h = curl_slist_append(h, line);
free(line);
}
return h;
}
el_val_t http_get_with_headers(el_val_t url, el_val_t headers_map) {
struct curl_slist* h = headers_from_map(headers_map);
el_val_t r = http_do("GET", EL_CSTR(url), NULL, h);
if (h) curl_slist_free_all(h);
return r;
}
el_val_t http_post_with_headers(el_val_t url, el_val_t body, el_val_t headers_map) {
struct curl_slist* h = headers_from_map(headers_map);
el_val_t r = http_do("POST", EL_CSTR(url), EL_CSTR(body), h);
if (h) curl_slist_free_all(h);
return r;
}
el_val_t http_post_form_auth(el_val_t url, el_val_t form_body, el_val_t auth_header) {
struct curl_slist* h = NULL;
h = curl_slist_append(h, "Content-Type: application/x-www-form-urlencoded");
const char* a = EL_CSTR(auth_header);
if (a && *a) {
size_t n = strlen(a) + 32;
char* line = malloc(n);
snprintf(line, n, "Authorization: %s", a);
h = curl_slist_append(h, line);
free(line);
}
el_val_t r = http_do("POST", EL_CSTR(url), EL_CSTR(form_body), h);
curl_slist_free_all(h);
return r;
}
/* ── HTTP server (POSIX sockets + pthreads) ──────────────────────────────── */
#define HTTP_MAX_CONNS 64
typedef el_val_t (*http_handler_fn)(el_val_t method, el_val_t path, el_val_t body);
typedef struct {
char* name;
http_handler_fn fn;
} HttpHandlerEntry;
static HttpHandlerEntry _http_handlers[32];
static size_t _http_handler_count = 0;
static char* _http_active_handler = NULL;
static pthread_mutex_t _http_handler_mu = PTHREAD_MUTEX_INITIALIZER;
static pthread_mutex_t _http_conn_mu = PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t _http_conn_cv = PTHREAD_COND_INITIALIZER;
static int _http_conn_active = 0;
/* Public C-level API: register a handler by name. Programs that want El
* `http_serve` to dispatch into their handler call this from main() before
* http_serve. Not declared in the header to keep the public API minimal —
* extern lookup works since C symbols are global. */
void el_runtime_register_handler(const char* name, http_handler_fn fn);
void el_runtime_register_handler(const char* name, http_handler_fn fn) {
if (!name || !fn) return;
pthread_mutex_lock(&_http_handler_mu);
for (size_t i = 0; i < _http_handler_count; i++) {
if (strcmp(_http_handlers[i].name, name) == 0) {
_http_handlers[i].fn = fn;
pthread_mutex_unlock(&_http_handler_mu);
return;
}
}
if (_http_handler_count < sizeof(_http_handlers) / sizeof(_http_handlers[0])) {
_http_handlers[_http_handler_count].name = el_strdup(name);
_http_handlers[_http_handler_count].fn = fn;
_http_handler_count++;
}
pthread_mutex_unlock(&_http_handler_mu);
}
void http_set_handler(el_val_t name) {
const char* n = EL_CSTR(name);
pthread_mutex_lock(&_http_handler_mu);
free(_http_active_handler);
_http_active_handler = el_strdup(n ? n : "");
/* If the name is not yet in the registry, try dlsym lookup against
* the running binary's symbol table. Every El `fn name(...)` compiles
* to a global C symbol with that exact name, so El programs can self-
* register their own handlers just by calling http_set_handler("name"). */
if (n && *n) {
int found = 0;
for (size_t i = 0; i < _http_handler_count; i++) {
if (strcmp(_http_handlers[i].name, n) == 0) { found = 1; break; }
}
if (!found) {
void* sym = dlsym(RTLD_DEFAULT, n);
if (sym && _http_handler_count < sizeof(_http_handlers) / sizeof(_http_handlers[0])) {
_http_handlers[_http_handler_count].name = el_strdup(n);
_http_handlers[_http_handler_count].fn = (http_handler_fn)sym;
_http_handler_count++;
}
}
}
pthread_mutex_unlock(&_http_handler_mu);
}
static http_handler_fn http_lookup_active(void) {
http_handler_fn out = NULL;
pthread_mutex_lock(&_http_handler_mu);
if (_http_active_handler) {
for (size_t i = 0; i < _http_handler_count; i++) {
if (strcmp(_http_handlers[i].name, _http_active_handler) == 0) {
out = _http_handlers[i].fn; break;
}
}
}
pthread_mutex_unlock(&_http_handler_mu);
return out;
}
/* Auto-detect Content-Type from response body. */
static const char* http_detect_content_type(const char* body) {
if (!body) return "text/plain; charset=utf-8";
const char* p = body;
while (*p == ' ' || *p == '\t' || *p == '\n' || *p == '\r') p++;
if (strncasecmp(p, "<!DOCTYPE", 9) == 0) return "text/html; charset=utf-8";
if (strncasecmp(p, "<html", 5) == 0) return "text/html; charset=utf-8";
if (*p == '{' || *p == '[') return "application/json; charset=utf-8";
return "text/plain; charset=utf-8";
}
/* Read the full HTTP request from a connection: request line, headers, body. */
static int http_read_request(int fd, char** out_method, char** out_path,
char** out_body) {
*out_method = NULL; *out_path = NULL; *out_body = NULL;
/* Read headers until \r\n\r\n */
size_t cap = 4096, len = 0;
char* buf = malloc(cap);
if (!buf) return -1;
while (1) {
if (len + 1 >= cap) {
if (cap >= 1024 * 1024) { free(buf); return -1; }
cap *= 2;
buf = realloc(buf, cap);
if (!buf) return -1;
}
ssize_t n = recv(fd, buf + len, cap - len - 1, 0);
if (n <= 0) { free(buf); return -1; }
len += (size_t)n;
buf[len] = '\0';
if (strstr(buf, "\r\n\r\n")) break;
}
/* Parse request line */
char* sp1 = strchr(buf, ' ');
if (!sp1) { free(buf); return -1; }
*sp1 = '\0';
*out_method = el_strdup(buf);
char* path_start = sp1 + 1;
char* sp2 = strchr(path_start, ' ');
if (!sp2) { free(*out_method); *out_method = NULL; free(buf); return -1; }
*sp2 = '\0';
*out_path = el_strdup(path_start);
char* hdr_end = strstr(sp2 + 1, "\r\n\r\n");
/* Find Content-Length */
long content_length = 0;
char* hp = sp2 + 1;
while (hp < hdr_end) {
char* line_end = strstr(hp, "\r\n");
if (!line_end || line_end >= hdr_end) break;
if (strncasecmp(hp, "Content-Length:", 15) == 0) {
content_length = strtol(hp + 15, NULL, 10);
if (content_length < 0) content_length = 0;
if (content_length > 64 * 1024 * 1024) content_length = 64 * 1024 * 1024;
}
hp = line_end + 2;
}
/* Body: any bytes already read past hdr_end, plus more recv */
char* body_start = hdr_end + 4;
size_t body_have = (buf + len) - body_start;
char* body = malloc((size_t)content_length + 1);
if (!body) { free(*out_method); free(*out_path); *out_method=NULL; *out_path=NULL; free(buf); return -1; }
if ((long)body_have > content_length) body_have = (size_t)content_length;
if (body_have > 0) memcpy(body, body_start, body_have);
while ((long)body_have < content_length) {
ssize_t n = recv(fd, body + body_have, (size_t)content_length - body_have, 0);
if (n <= 0) break;
body_have += (size_t)n;
}
body[body_have] = '\0';
*out_body = body;
free(buf);
return 0;
}
static void http_send_response(int fd, const char* body) {
if (!body) body = "";
const char* ct = http_detect_content_type(body);
size_t blen = strlen(body);
char header[512];
int hl = snprintf(header, sizeof(header),
"HTTP/1.1 200 OK\r\n"
"Content-Type: %s\r\n"
"Content-Length: %zu\r\n"
"Connection: close\r\n"
"\r\n", ct, blen);
if (hl < 0) return;
/* Best-effort full writes */
const char* p = header; size_t left = (size_t)hl;
while (left > 0) {
ssize_t w = send(fd, p, left, 0);
if (w <= 0) return;
p += w; left -= (size_t)w;
}
p = body; left = blen;
while (left > 0) {
ssize_t w = send(fd, p, left, 0);
if (w <= 0) return;
p += w; left -= (size_t)w;
}
}
typedef struct {
int fd;
} HttpWorkerArg;
static void* http_worker(void* arg) {
HttpWorkerArg* a = (HttpWorkerArg*)arg;
int fd = a->fd;
free(a);
char *method = NULL, *path = NULL, *body = NULL;
if (http_read_request(fd, &method, &path, &body) == 0) {
http_handler_fn h = http_lookup_active();
char* response = NULL;
if (h) {
el_val_t r = h(EL_STR(method), EL_STR(path), EL_STR(body));
const char* rs = EL_CSTR(r);
response = el_strdup(rs ? rs : "");
} else {
response = el_strdup("el-runtime: no http handler registered (call http_set_handler)");
}
http_send_response(fd, response);
free(response);
}
free(method); free(path); free(body);
close(fd);
/* release a slot */
pthread_mutex_lock(&_http_conn_mu);
_http_conn_active--;
pthread_cond_signal(&_http_conn_cv);
pthread_mutex_unlock(&_http_conn_mu);
return NULL;
}
void http_serve(el_val_t port, el_val_t handler) {
/* If `handler` looks like a string name, register it as the active handler. */
const char* hname = EL_CSTR(handler);
if (hname && looks_like_string(handler)) {
http_set_handler(handler);
}
int p = (int)port;
if (p <= 0 || p > 65535) { fprintf(stderr, "http_serve: invalid port %d\n", p); return; }
int sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock < 0) { perror("socket"); return; }
int yes = 1;
setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes));
struct sockaddr_in addr;
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl(INADDR_ANY);
addr.sin_port = htons((uint16_t)p);
if (bind(sock, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
perror("bind"); close(sock); return;
}
if (listen(sock, 64) < 0) { perror("listen"); close(sock); return; }
fprintf(stderr, "[http] listening on 0.0.0.0:%d\n", p);
while (1) {
struct sockaddr_in cli;
socklen_t clen = sizeof(cli);
int cfd = accept(sock, (struct sockaddr*)&cli, &clen);
if (cfd < 0) {
if (errno == EINTR) continue;
perror("accept"); break;
}
pthread_mutex_lock(&_http_conn_mu);
while (_http_conn_active >= HTTP_MAX_CONNS) {
pthread_cond_wait(&_http_conn_cv, &_http_conn_mu);
}
_http_conn_active++;
pthread_mutex_unlock(&_http_conn_mu);
HttpWorkerArg* arg = malloc(sizeof(HttpWorkerArg));
if (!arg) { close(cfd); continue; }
arg->fd = cfd;
pthread_t tid;
if (pthread_create(&tid, NULL, http_worker, arg) != 0) {
close(cfd); free(arg);
pthread_mutex_lock(&_http_conn_mu);
_http_conn_active--;
pthread_cond_signal(&_http_conn_cv);
pthread_mutex_unlock(&_http_conn_mu);
continue;
}
pthread_detach(tid);
}
close(sock);
}
/* ── Filesystem ──────────────────────────────────────────────────────────── */
el_val_t fs_read(el_val_t pathv) {
const char* path = EL_CSTR(pathv);
if (!path) return el_wrap_str(el_strdup(""));
FILE* f = fopen(path, "rb");
if (!f) return el_wrap_str(el_strdup(""));
fseek(f, 0, SEEK_END);
long sz = ftell(f);
rewind(f);
char* buf = el_strbuf((size_t)sz);
size_t got = fread(buf, 1, (size_t)sz, f);
buf[got] = '\0';
fclose(f);
return el_wrap_str(buf);
}
el_val_t fs_write(el_val_t pathv, el_val_t contentv) {
const char* path = EL_CSTR(pathv);
const char* content = EL_CSTR(contentv);
if (!path || !content) return 0;
FILE* f = fopen(path, "wb");
if (!f) return 0;
size_t n = strlen(content);
size_t written = fwrite(content, 1, n, f);
fclose(f);
return written == n ? 1 : 0;
}
el_val_t fs_list(el_val_t pathv) {
const char* path = EL_CSTR(pathv);
el_val_t lst = el_list_empty();
if (!path) return lst;
DIR* d = opendir(path);
if (!d) return lst;
struct dirent* e;
while ((e = readdir(d)) != NULL) {
if (strcmp(e->d_name, ".") == 0 || strcmp(e->d_name, "..") == 0) continue;
lst = el_list_append(lst, el_wrap_str(el_strdup(e->d_name)));
}
closedir(d);
return lst;
}
/* ── JSON ────────────────────────────────────────────────────────────────── */
el_val_t json_get(el_val_t jsonv, el_val_t keyv) {
const char* json = EL_CSTR(jsonv);
const char* key = EL_CSTR(keyv);
if (!json || !key) return el_wrap_str(el_strdup(""));
size_t klen = strlen(key);
char* pattern = el_strbuf(klen + 4);
snprintf(pattern, klen + 5, "\"%s\":", key);
const char* p = strstr(json, pattern);
free(pattern);
if (!p) return el_wrap_str(el_strdup(""));
p += strlen(key) + 3; /* skip "key": */
while (*p == ' ' || *p == '\t' || *p == '\n') p++;
if (*p == '"') {
p++;
const char* start = p;
while (*p && !(*p == '"' && *(p-1) != '\\')) p++;
size_t len = (size_t)(p - start);
char* out = el_strbuf(len);
memcpy(out, start, len);
out[len] = '\0';
return el_wrap_str(out);
}
const char* start = p;
while (*p && *p != ',' && *p != '}' && *p != ']' && *p != '\n') p++;
size_t len = (size_t)(p - start);
char* out = el_strbuf(len);
memcpy(out, start, len);
out[len] = '\0';
return el_wrap_str(out);
}
/* ── Float bit-cast helpers ──────────────────────────────────────────────── */
/* `el_to_float` and `el_from_float` are exposed in el_runtime.h as static
* inlines so generated programs (which #include the header) can call them
* for Float literals. No definitions are needed here. */
/* ── JSON parser (recursive descent) ─────────────────────────────────────── */
/*
* Parsed JSON representation:
* - object -> ElMap (keys & values are el_val_t)
* - array -> ElList
* - string -> EL_STR-wrapped char* (allocated)
* - number -> int (el_val_t) if integer, otherwise el_from_float(double)
* - true -> 1
* - false -> 0
* - null -> EL_NULL (0)
*
* Note: there is no runtime type tag — parsed numbers cannot be
* distinguished from booleans by the runtime alone. The codegen tracks
* types separately. This matches the rest of el_val_t's type-erased model.
*/
/* JsonParser struct is forward-declared near the HTTP/Engram section. */
static void jp_skip_ws(JsonParser* jp) {
while (jp->p < jp->end) {
char c = *jp->p;
if (c == ' ' || c == '\t' || c == '\n' || c == '\r') jp->p++;
else break;
}
}
static el_val_t jp_parse_value(JsonParser* jp);
/* Parse a JSON string literal (the opening " has NOT yet been consumed). */
static char* jp_parse_string_raw(JsonParser* jp) {
if (jp->p >= jp->end || *jp->p != '"') { jp->err = 1; return el_strdup(""); }
jp->p++;
size_t cap = 32, len = 0;
char* out = malloc(cap);
if (!out) { fputs("el_runtime: out of memory\n", stderr); exit(1); }
while (jp->p < jp->end && *jp->p != '"') {
char c = *jp->p++;
if (c == '\\' && jp->p < jp->end) {
char esc = *jp->p++;
switch (esc) {
case '"': c = '"'; break;
case '\\': c = '\\'; break;
case '/': c = '/'; break;
case 'b': c = '\b'; break;
case 'f': c = '\f'; break;
case 'n': c = '\n'; break;
case 'r': c = '\r'; break;
case 't': c = '\t'; break;
case 'u': {
/* Skip 4 hex digits; emit '?' as a placeholder */
for (int i = 0; i < 4 && jp->p < jp->end; i++) jp->p++;
c = '?';
break;
}
default: c = esc; break;
}
}
if (len + 1 >= cap) {
cap *= 2;
out = realloc(out, cap);
if (!out) { fputs("el_runtime: out of memory\n", stderr); exit(1); }
}
out[len++] = c;
}
if (jp->p < jp->end && *jp->p == '"') jp->p++;
else jp->err = 1;
out[len] = '\0';
return out;
}
static el_val_t jp_parse_number(JsonParser* jp) {
const char* start = jp->p;
int is_float = 0;
if (jp->p < jp->end && (*jp->p == '-' || *jp->p == '+')) jp->p++;
while (jp->p < jp->end && isdigit((unsigned char)*jp->p)) jp->p++;
if (jp->p < jp->end && *jp->p == '.') {
is_float = 1; jp->p++;
while (jp->p < jp->end && isdigit((unsigned char)*jp->p)) jp->p++;
}
if (jp->p < jp->end && (*jp->p == 'e' || *jp->p == 'E')) {
is_float = 1; jp->p++;
if (jp->p < jp->end && (*jp->p == '+' || *jp->p == '-')) jp->p++;
while (jp->p < jp->end && isdigit((unsigned char)*jp->p)) jp->p++;
}
size_t n = (size_t)(jp->p - start);
char buf[64];
if (n >= sizeof(buf)) n = sizeof(buf) - 1;
memcpy(buf, start, n);
buf[n] = '\0';
if (is_float) return el_from_float(strtod(buf, NULL));
return (el_val_t)strtoll(buf, NULL, 10);
}
static el_val_t jp_parse_array(JsonParser* jp) {
if (jp->p < jp->end && *jp->p == '[') jp->p++;
el_val_t lst = el_list_empty();
jp_skip_ws(jp);
if (jp->p < jp->end && *jp->p == ']') { jp->p++; return lst; }
while (jp->p < jp->end) {
jp_skip_ws(jp);
el_val_t v = jp_parse_value(jp);
lst = el_list_append(lst, v);
jp_skip_ws(jp);
if (jp->p < jp->end && *jp->p == ',') { jp->p++; continue; }
if (jp->p < jp->end && *jp->p == ']') { jp->p++; break; }
jp->err = 1;
break;
}
return lst;
}
static el_val_t jp_parse_object(JsonParser* jp) {
if (jp->p < jp->end && *jp->p == '{') jp->p++;
el_val_t m = el_map_new(0);
jp_skip_ws(jp);
if (jp->p < jp->end && *jp->p == '}') { jp->p++; return m; }
while (jp->p < jp->end) {
jp_skip_ws(jp);
char* key = jp_parse_string_raw(jp);
jp_skip_ws(jp);
if (jp->p < jp->end && *jp->p == ':') jp->p++;
else { jp->err = 1; free(key); break; }
jp_skip_ws(jp);
el_val_t v = jp_parse_value(jp);
m = el_map_set(m, EL_STR(key), v);
jp_skip_ws(jp);
if (jp->p < jp->end && *jp->p == ',') { jp->p++; continue; }
if (jp->p < jp->end && *jp->p == '}') { jp->p++; break; }
jp->err = 1;
break;
}
return m;
}
static el_val_t jp_parse_value(JsonParser* jp) {
jp_skip_ws(jp);
if (jp->p >= jp->end) { jp->err = 1; return EL_NULL; }
char c = *jp->p;
if (c == '"') return el_wrap_str(jp_parse_string_raw(jp));
if (c == '{') return jp_parse_object(jp);
if (c == '[') return jp_parse_array(jp);
if (c == '-' || isdigit((unsigned char)c)) return jp_parse_number(jp);
if (c == 't' && jp->p + 4 <= jp->end && strncmp(jp->p, "true", 4) == 0) { jp->p += 4; return 1; }
if (c == 'f' && jp->p + 5 <= jp->end && strncmp(jp->p, "false", 5) == 0) { jp->p += 5; return 0; }
if (c == 'n' && jp->p + 4 <= jp->end && strncmp(jp->p, "null", 4) == 0) { jp->p += 4; return EL_NULL; }
jp->err = 1;
return EL_NULL;
}
el_val_t json_parse(el_val_t sv) {
const char* s = EL_CSTR(sv);
if (!s) return EL_NULL;
JsonParser jp = { .p = s, .end = s + strlen(s), .err = 0 };
el_val_t v = jp_parse_value(&jp);
if (jp.err) return EL_NULL;
return v;
}
/* ── JSON stringify ──────────────────────────────────────────────────────── */
/*
* Stringify policy: el_val_t is type-erased, so we cannot perfectly
* round-trip arbitrary values. We use these heuristics:
* - If value is an ElList pointer (in the heap range), serialize as array.
* - If value is an ElMap pointer, serialize as object.
* - If value looks like a printable string pointer, serialize as string.
* - Otherwise serialize as integer.
* This is best-effort. Programs that need exact control should build the
* string directly. A pointer test is the cheapest way to disambiguate
* from small integers without a separate type tag.
*/
/* JsonBuf struct is forward-declared near the HTTP section so HTTP helpers
* can use it. Its definition appears there. */
static void jb_init(JsonBuf* b) {
b->cap = 64; b->len = 0;
b->buf = malloc(b->cap);
if (!b->buf) { fputs("el_runtime: out of memory\n", stderr); exit(1); }
b->buf[0] = '\0';
}
static void jb_reserve(JsonBuf* b, size_t add) {
if (b->len + add + 1 > b->cap) {
while (b->len + add + 1 > b->cap) b->cap *= 2;
b->buf = realloc(b->buf, b->cap);
if (!b->buf) { fputs("el_runtime: out of memory\n", stderr); exit(1); }
}
}
static void jb_putc(JsonBuf* b, char c) {
jb_reserve(b, 1);
b->buf[b->len++] = c;
b->buf[b->len] = '\0';
}
static void jb_puts(JsonBuf* b, const char* s) {
size_t n = strlen(s);
jb_reserve(b, n);
memcpy(b->buf + b->len, s, n);
b->len += n;
b->buf[b->len] = '\0';
}
static void jb_emit_escaped(JsonBuf* b, const char* s) {
jb_putc(b, '"');
for (; *s; s++) {
unsigned char c = (unsigned char)*s;
switch (c) {
case '"': jb_puts(b, "\\\""); break;
case '\\': jb_puts(b, "\\\\"); break;
case '\b': jb_puts(b, "\\b"); break;
case '\f': jb_puts(b, "\\f"); break;
case '\n': jb_puts(b, "\\n"); break;
case '\r': jb_puts(b, "\\r"); break;
case '\t': jb_puts(b, "\\t"); break;
default:
if (c < 0x20) {
char tmp[8];
snprintf(tmp, sizeof(tmp), "\\u%04x", c);
jb_puts(b, tmp);
} else {
jb_putc(b, (char)c);
}
break;
}
}
jb_putc(b, '"');
}
/* Heuristic: is this el_val_t likely a pointer to an ElList?
* We can't fully verify, but pointers are large addresses, integers small.
* Treat values whose magnitude exceeds 2^32 as potential pointers and
* sniff by reading the header conservatively.
*
* Simpler heuristic: if the value reads as a printable string, treat as
* string; otherwise as integer. Lists/Maps are encoded as struct pointers,
* which have leading binary bytes — so they won't look like strings. */
static int looks_like_string(el_val_t v) {
if (v == 0) return 0;
/* Treat plausible heap addresses as candidates */
uintptr_t p = (uintptr_t)v;
/* Small integers (positive and negative) are not pointers */
if ((int64_t)v >= -1000000 && (int64_t)v <= 1000000) return 0;
if (p < 0x1000) return 0;
/* Sniff first bytes for printable */
const unsigned char* s = (const unsigned char*)p;
for (int i = 0; i < 16; i++) {
unsigned char c = s[i];
if (c == '\0') return i > 0; /* terminated string */
if (c < 0x09 || (c > 0x0d && c < 0x20) || c >= 0x7f) return 0;
}
return 1; /* 16+ printable bytes — call it a string */
}
static void jb_emit_value(JsonBuf* b, el_val_t v);
static void jb_emit_int(JsonBuf* b, int64_t n) {
char tmp[32];
snprintf(tmp, sizeof(tmp), "%lld", (long long)n);
jb_puts(b, tmp);
}
static void jb_emit_value(JsonBuf* b, el_val_t v) {
if (v == EL_NULL) { jb_puts(b, "null"); return; }
if (looks_like_string(v)) {
jb_emit_escaped(b, EL_CSTR(v));
return;
}
jb_emit_int(b, (int64_t)v);
}
el_val_t json_stringify(el_val_t v) {
JsonBuf b; jb_init(&b);
jb_emit_value(&b, v);
return el_wrap_str(b.buf);
}
/* ── JSON substring accessors ────────────────────────────────────────────── */
/*
* These walk the raw JSON string looking for "key": at the top level (depth 1)
* of an object. They handle escaped quotes, nested objects/arrays, and
* whitespace around the colon.
*/
/* Find "key": at object-depth == 1 inside the JSON object string `s`.
* Returns pointer to the first byte of the value, or NULL. */
static const char* json_find_key(const char* s, const char* key) {
if (!s || !key) return NULL;
size_t klen = strlen(key);
int depth = 0;
int in_str = 0;
int escape = 0;
const char* p = s;
while (*p) {
char c = *p;
if (in_str) {
if (escape) { escape = 0; }
else if (c == '\\') { escape = 1; }
else if (c == '"') {
/* End of string. If we're at depth 1, check if this was a key. */
p++;
if (depth == 1) {
/* The string just ended at p-1. Check if it matches key
* and is followed by a colon. We need to backtrack to find
* the start of this string and compare. */
}
in_str = 0;
continue;
}
p++;
continue;
}
if (c == '"') {
/* Start of a string literal */
const char* str_start = p + 1;
const char* q = str_start;
int e = 0;
while (*q) {
if (e) { e = 0; q++; continue; }
if (*q == '\\') { e = 1; q++; continue; }
if (*q == '"') break;
q++;
}
size_t slen = (size_t)(q - str_start);
const char* after = (*q == '"') ? q + 1 : q;
/* If at depth 1 and matches key and followed by ':' -> got it */
if (depth == 1 && slen == klen && strncmp(str_start, key, klen) == 0) {
const char* r = after;
while (*r == ' ' || *r == '\t' || *r == '\n' || *r == '\r') r++;
if (*r == ':') {
r++;
while (*r == ' ' || *r == '\t' || *r == '\n' || *r == '\r') r++;
return r;
}
}
p = after;
continue;
}
if (c == '{' || c == '[') depth++;
else if (c == '}' || c == ']') depth--;
p++;
}
return NULL;
}
/* Skip a JSON value starting at p; return pointer past the value end. */
static const char* json_skip_value(const char* p) {
if (!p || !*p) return p;
while (*p == ' ' || *p == '\t' || *p == '\n' || *p == '\r') p++;
if (*p == '"') {
p++;
int e = 0;
while (*p) {
if (e) { e = 0; p++; continue; }
if (*p == '\\') { e = 1; p++; continue; }
if (*p == '"') { p++; break; }
p++;
}
return p;
}
if (*p == '{' || *p == '[') {
char open = *p;
char close = (open == '{') ? '}' : ']';
int depth = 0;
int in_str = 0;
int e = 0;
while (*p) {
char c = *p;
if (in_str) {
if (e) { e = 0; }
else if (c == '\\') { e = 1; }
else if (c == '"') in_str = 0;
p++;
continue;
}
if (c == '"') { in_str = 1; p++; continue; }
if (c == open) depth++;
else if (c == close) { depth--; p++; if (depth == 0) return p; continue; }
p++;
}
return p;
}
/* scalar: number, true/false/null */
while (*p && *p != ',' && *p != '}' && *p != ']' &&
*p != ' ' && *p != '\t' && *p != '\n' && *p != '\r') p++;
return p;
}
el_val_t json_get_string(el_val_t json_str, el_val_t key) {
const char* json = EL_CSTR(json_str);
const char* k = EL_CSTR(key);
const char* p = json_find_key(json, k);
if (!p || *p != '"') return el_wrap_str(el_strdup(""));
p++;
JsonParser jp = { .p = p - 1, .end = json + (json ? strlen(json) : 0), .err = 0 };
char* parsed = jp_parse_string_raw(&jp);
if (jp.err) { free(parsed); return el_wrap_str(el_strdup("")); }
return el_wrap_str(parsed);
}
el_val_t json_get_int(el_val_t json_str, el_val_t key) {
const char* json = EL_CSTR(json_str);
const char* k = EL_CSTR(key);
const char* p = json_find_key(json, k);
if (!p) return 0;
if (*p == '"' || *p == '{' || *p == '[') return 0;
return (el_val_t)strtoll(p, NULL, 10);
}
el_val_t json_get_float(el_val_t json_str, el_val_t key) {
const char* json = EL_CSTR(json_str);
const char* k = EL_CSTR(key);
const char* p = json_find_key(json, k);
if (!p) return 0;
if (*p == '"' || *p == '{' || *p == '[') return 0;
return el_from_float(strtod(p, NULL));
}
el_val_t json_get_bool(el_val_t json_str, el_val_t key) {
const char* json = EL_CSTR(json_str);
const char* k = EL_CSTR(key);
const char* p = json_find_key(json, k);
if (!p) return 0;
if (strncmp(p, "true", 4) == 0) return 1;
return 0;
}
el_val_t json_get_raw(el_val_t json_str, el_val_t key) {
const char* json = EL_CSTR(json_str);
const char* k = EL_CSTR(key);
const char* p = json_find_key(json, k);
if (!p) return el_wrap_str(el_strdup(""));
const char* end = json_skip_value(p);
size_t n = (size_t)(end - p);
char* out = el_strbuf(n);
memcpy(out, p, n);
out[n] = '\0';
return el_wrap_str(out);
}
el_val_t json_set(el_val_t json_str, el_val_t key, el_val_t value) {
const char* json = EL_CSTR(json_str);
const char* k = EL_CSTR(key);
if (!k) k = "";
if (!json || !*json) {
/* Build a fresh object */
JsonBuf b; jb_init(&b);
jb_putc(&b, '{');
jb_emit_escaped(&b, k);
jb_putc(&b, ':');
jb_emit_value(&b, value);
jb_putc(&b, '}');
return el_wrap_str(b.buf);
}
const char* existing = json_find_key(json, k);
JsonBuf b; jb_init(&b);
if (existing) {
const char* end = json_skip_value(existing);
/* Copy [json .. existing) */
size_t prefix = (size_t)(existing - json);
jb_reserve(&b, prefix);
memcpy(b.buf + b.len, json, prefix);
b.len += prefix;
b.buf[b.len] = '\0';
jb_emit_value(&b, value);
jb_puts(&b, end);
return el_wrap_str(b.buf);
}
/* Insert before closing '}'. Find last '}' */
size_t jl = strlen(json);
if (jl == 0) { free(b.buf); return el_wrap_str(el_strdup("{}")); }
/* Find last '}' from the end */
ssize_t close_idx = -1;
for (ssize_t i = (ssize_t)jl - 1; i >= 0; i--) {
if (json[i] == '}') { close_idx = i; break; }
}
if (close_idx < 0) {
free(b.buf);
return el_wrap_str(el_strdup(json));
}
/* Determine if object is empty: scan between last '{' and '}' for non-ws */
int empty = 1;
for (ssize_t i = close_idx - 1; i >= 0; i--) {
char c = json[i];
if (c == '{') break;
if (c != ' ' && c != '\t' && c != '\n' && c != '\r') { empty = 0; break; }
}
/* Copy json[0..close_idx) */
jb_reserve(&b, (size_t)close_idx);
memcpy(b.buf + b.len, json, (size_t)close_idx);
b.len += (size_t)close_idx;
b.buf[b.len] = '\0';
if (!empty) jb_putc(&b, ',');
jb_emit_escaped(&b, k);
jb_putc(&b, ':');
jb_emit_value(&b, value);
/* Append from close_idx onward */
jb_puts(&b, json + close_idx);
return el_wrap_str(b.buf);
}
el_val_t json_array_len(el_val_t json_str) {
const char* s = EL_CSTR(json_str);
if (!s) return 0;
while (*s == ' ' || *s == '\t' || *s == '\n' || *s == '\r') s++;
if (*s != '[') return 0;
s++;
while (*s == ' ' || *s == '\t' || *s == '\n' || *s == '\r') s++;
if (*s == ']') return 0;
int64_t count = 0;
while (*s) {
const char* end = json_skip_value(s);
if (end == s) break;
count++;
s = end;
while (*s == ' ' || *s == '\t' || *s == '\n' || *s == '\r') s++;
if (*s == ',') { s++; continue; }
if (*s == ']' || *s == '\0') break;
}
return (el_val_t)count;
}
/* ── Time ────────────────────────────────────────────────────────────────── */
el_val_t time_now(void) {
struct timeval tv;
gettimeofday(&tv, NULL);
int64_t ms = (int64_t)tv.tv_sec * 1000LL + (int64_t)tv.tv_usec / 1000LL;
return (el_val_t)ms;
}
el_val_t time_now_utc(void) {
return time_now();
}
el_val_t time_format(el_val_t ts, el_val_t fmt) {
int64_t ms = (int64_t)ts;
time_t s = (time_t)(ms / 1000);
int msec = (int)(ms % 1000);
if (msec < 0) { msec += 1000; s -= 1; }
struct tm tm;
gmtime_r(&s, &tm);
const char* fmt_str = EL_CSTR(fmt);
if (!fmt_str || strcmp(fmt_str, "ISO") == 0) {
char buf[64];
snprintf(buf, sizeof(buf), "%04d-%02d-%02dT%02d:%02d:%02d.%03dZ",
tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
tm.tm_hour, tm.tm_min, tm.tm_sec, msec);
return el_wrap_str(el_strdup(buf));
}
char buf[256];
if (strftime(buf, sizeof(buf), fmt_str, &tm) == 0) buf[0] = '\0';
return el_wrap_str(el_strdup(buf));
}
el_val_t time_to_parts(el_val_t ts) {
int64_t ms = (int64_t)ts;
time_t s = (time_t)(ms / 1000);
int msec = (int)(ms % 1000);
if (msec < 0) { msec += 1000; s -= 1; }
struct tm tm;
gmtime_r(&s, &tm);
el_val_t m = el_map_new(0);
m = el_map_set(m, EL_STR(el_strdup("year")), (el_val_t)(tm.tm_year + 1900));
m = el_map_set(m, EL_STR(el_strdup("month")), (el_val_t)(tm.tm_mon + 1));
m = el_map_set(m, EL_STR(el_strdup("day")), (el_val_t)tm.tm_mday);
m = el_map_set(m, EL_STR(el_strdup("hour")), (el_val_t)tm.tm_hour);
m = el_map_set(m, EL_STR(el_strdup("minute")), (el_val_t)tm.tm_min);
m = el_map_set(m, EL_STR(el_strdup("second")), (el_val_t)tm.tm_sec);
m = el_map_set(m, EL_STR(el_strdup("ms")), (el_val_t)msec);
return m;
}
el_val_t time_from_parts(el_val_t secs, el_val_t ns, el_val_t tz) {
(void)tz;
int64_t s = (int64_t)secs;
int64_t n = (int64_t)ns;
int64_t ms = s * 1000LL + n / 1000000LL;
return (el_val_t)ms;
}
el_val_t time_add(el_val_t ts, el_val_t n, el_val_t unit) {
const char* u = EL_CSTR(unit);
int64_t cur = (int64_t)ts;
int64_t d = (int64_t)n;
int64_t add_ms = d;
if (u) {
if (strcmp(u, "ms") == 0) add_ms = d;
else if (strcmp(u, "sec") == 0) add_ms = d * 1000LL;
else if (strcmp(u, "min") == 0) add_ms = d * 60000LL;
else if (strcmp(u, "hour") == 0) add_ms = d * 3600000LL;
else if (strcmp(u, "day") == 0) add_ms = d * 86400000LL;
}
return (el_val_t)(cur + add_ms);
}
el_val_t time_diff(el_val_t ts1, el_val_t ts2, el_val_t unit) {
int64_t d = (int64_t)ts2 - (int64_t)ts1;
const char* u = EL_CSTR(unit);
if (!u || strcmp(u, "ms") == 0) return (el_val_t)d;
if (strcmp(u, "sec") == 0) return (el_val_t)(d / 1000LL);
if (strcmp(u, "min") == 0) return (el_val_t)(d / 60000LL);
if (strcmp(u, "hour") == 0) return (el_val_t)(d / 3600000LL);
if (strcmp(u, "day") == 0) return (el_val_t)(d / 86400000LL);
return (el_val_t)d;
}
/* ── UUID v4 ─────────────────────────────────────────────────────────────── */
static int _el_uuid_seeded = 0;
static void _el_uuid_seed(void) {
if (!_el_uuid_seeded) {
srand((unsigned)time(NULL) ^ (unsigned)(uintptr_t)&_el_uuid_seeded);
_el_uuid_seeded = 1;
}
}
el_val_t uuid_new(void) {
_el_uuid_seed();
unsigned char b[16];
for (int i = 0; i < 16; i++) b[i] = (unsigned char)(rand() & 0xff);
/* Version 4 */
b[6] = (b[6] & 0x0f) | 0x40;
/* RFC 4122 variant */
b[8] = (b[8] & 0x3f) | 0x80;
char buf[37];
snprintf(buf, sizeof(buf),
"%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
b[0], b[1], b[2], b[3],
b[4], b[5],
b[6], b[7],
b[8], b[9],
b[10], b[11], b[12], b[13], b[14], b[15]);
return el_wrap_str(el_strdup(buf));
}
el_val_t uuid_v4(void) { return uuid_new(); }
/* ── Environment ─────────────────────────────────────────────────────────── */
el_val_t env(el_val_t key) {
const char* k = EL_CSTR(key);
if (!k) return el_wrap_str(el_strdup(""));
const char* v = getenv(k);
return el_wrap_str(el_strdup(v ? v : ""));
}
/* ── In-process state K/V ────────────────────────────────────────────────── */
typedef struct {
char* key;
char* value;
} StateEntry;
static StateEntry* _state_entries = NULL;
static size_t _state_count = 0;
static size_t _state_cap = 0;
static StateEntry* state_find(const char* key) {
for (size_t i = 0; i < _state_count; i++) {
if (strcmp(_state_entries[i].key, key) == 0) return &_state_entries[i];
}
return NULL;
}
el_val_t state_set(el_val_t key, el_val_t value) {
const char* k = EL_CSTR(key);
const char* v = EL_CSTR(value);
if (!k) return 0;
if (!v) v = "";
StateEntry* e = state_find(k);
if (e) {
free(e->value);
e->value = el_strdup(v);
return 1;
}
if (_state_count >= _state_cap) {
size_t nc = _state_cap == 0 ? 16 : _state_cap * 2;
_state_entries = realloc(_state_entries, nc * sizeof(StateEntry));
if (!_state_entries) { fputs("el_runtime: out of memory\n", stderr); exit(1); }
_state_cap = nc;
}
_state_entries[_state_count].key = el_strdup(k);
_state_entries[_state_count].value = el_strdup(v);
_state_count++;
return 1;
}
el_val_t state_get(el_val_t key) {
const char* k = EL_CSTR(key);
if (!k) return el_wrap_str(el_strdup(""));
StateEntry* e = state_find(k);
return el_wrap_str(el_strdup(e ? e->value : ""));
}
el_val_t state_del(el_val_t key) {
const char* k = EL_CSTR(key);
if (!k) return 0;
for (size_t i = 0; i < _state_count; i++) {
if (strcmp(_state_entries[i].key, k) == 0) {
free(_state_entries[i].key);
free(_state_entries[i].value);
for (size_t j = i + 1; j < _state_count; j++) {
_state_entries[j - 1] = _state_entries[j];
}
_state_count--;
return 1;
}
}
return 1;
}
el_val_t state_keys(void) {
el_val_t lst = el_list_empty();
for (size_t i = 0; i < _state_count; i++) {
lst = el_list_append(lst, el_wrap_str(el_strdup(_state_entries[i].key)));
}
return lst;
}
/* ── Float formatting ────────────────────────────────────────────────────── */
el_val_t float_to_str(el_val_t f) {
char buf[64];
snprintf(buf, sizeof(buf), "%g", el_to_float(f));
return el_wrap_str(el_strdup(buf));
}
el_val_t int_to_float(el_val_t n) {
return el_from_float((double)(int64_t)n);
}
el_val_t float_to_int(el_val_t f) {
return (el_val_t)(int64_t)el_to_float(f);
}
el_val_t format_float(el_val_t f, el_val_t decimals) {
int d = (int)(int64_t)decimals;
if (d < 0) d = 0;
if (d > 30) d = 30;
char buf[128];
snprintf(buf, sizeof(buf), "%.*f", d, el_to_float(f));
return el_wrap_str(el_strdup(buf));
}
el_val_t decimal_round(el_val_t f, el_val_t decimals) {
int d = (int)(int64_t)decimals;
if (d < 0) d = 0;
if (d > 15) d = 15;
double mul = pow(10.0, (double)d);
double v = el_to_float(f);
double r = (v >= 0.0 ? floor(v * mul + 0.5) : -floor(-v * mul + 0.5)) / mul;
return el_from_float(r);
}
el_val_t str_to_float(el_val_t s) {
const char* str = EL_CSTR(s);
if (!str) return el_from_float(0.0);
return el_from_float(strtod(str, NULL));
}
/* ── Math (Float-aware) ──────────────────────────────────────────────────── */
el_val_t math_sqrt(el_val_t f) { return el_from_float(sqrt(el_to_float(f))); }
el_val_t math_log(el_val_t f) { return el_from_float(log(el_to_float(f))); }
el_val_t math_ln(el_val_t f) { return el_from_float(log(el_to_float(f))); }
el_val_t math_sin(el_val_t f) { return el_from_float(sin(el_to_float(f))); }
el_val_t math_cos(el_val_t f) { return el_from_float(cos(el_to_float(f))); }
el_val_t math_pi(void) { return el_from_float(3.141592653589793238462643383279502884); }
/* ── String additions ────────────────────────────────────────────────────── */
el_val_t str_index_of(el_val_t s, el_val_t sub) {
const char* str = EL_CSTR(s);
const char* sb = EL_CSTR(sub);
if (!str || !sb) return -1;
const char* hit = strstr(str, sb);
if (!hit) return -1;
return (el_val_t)(int64_t)(hit - str);
}
el_val_t str_split(el_val_t s, el_val_t sep) {
const char* str = EL_CSTR(s);
const char* sp = EL_CSTR(sep);
el_val_t lst = el_list_empty();
if (!str) return lst;
if (!sp || !*sp) {
lst = el_list_append(lst, el_wrap_str(el_strdup(str)));
return lst;
}
size_t lp = strlen(sp);
const char* p = str;
const char* hit;
while ((hit = strstr(p, sp)) != NULL) {
size_t n = (size_t)(hit - p);
char* out = el_strbuf(n);
memcpy(out, p, n);
out[n] = '\0';
lst = el_list_append(lst, el_wrap_str(out));
p = hit + lp;
}
lst = el_list_append(lst, el_wrap_str(el_strdup(p)));
return lst;
}
el_val_t str_char_at(el_val_t s, el_val_t i) {
const char* str = EL_CSTR(s);
int64_t idx = (int64_t)i;
if (!str) return el_wrap_str(el_strdup(""));
int64_t n = (int64_t)strlen(str);
if (idx < 0 || idx >= n) return el_wrap_str(el_strdup(""));
char buf[2];
buf[0] = str[idx];
buf[1] = '\0';
return el_wrap_str(el_strdup(buf));
}
el_val_t str_char_code(el_val_t s, el_val_t i) {
const char* str = EL_CSTR(s);
int64_t idx = (int64_t)i;
if (!str) return 0;
int64_t n = (int64_t)strlen(str);
if (idx < 0 || idx >= n) return 0;
return (el_val_t)(unsigned char)str[idx];
}
static el_val_t str_pad(const char* s, int64_t width, const char* pad, int left) {
if (!s) s = "";
if (!pad || !*pad) pad = " ";
int64_t lp = (int64_t)strlen(pad);
int64_t ls = (int64_t)strlen(s);
if (ls >= width) return el_wrap_str(el_strdup(s));
int64_t need = width - ls;
char* out = el_strbuf((size_t)width);
if (left) {
for (int64_t i = 0; i < need; i++) out[i] = pad[i % lp];
memcpy(out + need, s, (size_t)ls);
} else {
memcpy(out, s, (size_t)ls);
for (int64_t i = 0; i < need; i++) out[ls + i] = pad[i % lp];
}
out[width] = '\0';
return el_wrap_str(out);
}
el_val_t str_pad_left(el_val_t s, el_val_t width, el_val_t pad) {
return str_pad(EL_CSTR(s), (int64_t)width, EL_CSTR(pad), 1);
}
el_val_t str_pad_right(el_val_t s, el_val_t width, el_val_t pad) {
return str_pad(EL_CSTR(s), (int64_t)width, EL_CSTR(pad), 0);
}
el_val_t str_format(el_val_t template, el_val_t data) {
const char* tpl = EL_CSTR(template);
if (!tpl) return el_wrap_str(el_strdup(""));
JsonBuf b; jb_init(&b);
const char* p = tpl;
while (*p) {
if (*p == '{') {
const char* q = p + 1;
while (*q && *q != '}') q++;
if (*q == '}') {
size_t klen = (size_t)(q - p - 1);
char keybuf[256];
if (klen < sizeof(keybuf)) {
memcpy(keybuf, p + 1, klen);
keybuf[klen] = '\0';
el_val_t v = el_map_get(data, EL_STR(keybuf));
if (v != 0 && looks_like_string(v)) {
jb_puts(&b, EL_CSTR(v));
p = q + 1;
continue;
} else if (v != 0) {
jb_emit_int(&b, (int64_t)v);
p = q + 1;
continue;
}
}
/* Unknown key — leave {key} verbatim */
jb_reserve(&b, klen + 2);
memcpy(b.buf + b.len, p, klen + 2);
b.len += klen + 2;
b.buf[b.len] = '\0';
p = q + 1;
continue;
}
}
jb_putc(&b, *p);
p++;
}
return el_wrap_str(b.buf);
}
el_val_t str_lower(el_val_t s) { return str_to_lower(s); }
el_val_t str_upper(el_val_t s) { return str_to_upper(s); }
/* ── List additions ──────────────────────────────────────────────────────── */
el_val_t list_push(el_val_t list, el_val_t elem) {
return el_list_append(list, elem);
}
el_val_t list_push_front(el_val_t listv, el_val_t elem) {
ElList* lst = (ElList*)(uintptr_t)listv;
if (!lst) {
el_val_t nl = el_list_empty();
return el_list_append(nl, elem);
}
/* Append to grow capacity, then shift right */
listv = el_list_append(listv, elem);
lst = (ElList*)(uintptr_t)listv;
for (int64_t i = lst->length - 1; i > 0; i--) {
lst->elems[i] = lst->elems[i - 1];
}
lst->elems[0] = elem;
return EL_STR(lst);
}
el_val_t list_join(el_val_t listv, el_val_t sep) {
ElList* lst = (ElList*)(uintptr_t)listv;
const char* sp = EL_CSTR(sep);
if (!sp) sp = "";
if (!lst || lst->length == 0) return el_wrap_str(el_strdup(""));
JsonBuf b; jb_init(&b);
for (int64_t i = 0; i < lst->length; i++) {
if (i > 0) jb_puts(&b, sp);
el_val_t v = lst->elems[i];
if (v == 0) continue;
if (looks_like_string(v)) {
jb_puts(&b, EL_CSTR(v));
} else {
char tmp[32];
snprintf(tmp, sizeof(tmp), "%lld", (long long)v);
jb_puts(&b, tmp);
}
}
return el_wrap_str(b.buf);
}
el_val_t list_range(el_val_t start, el_val_t end) {
int64_t a = (int64_t)start;
int64_t b = (int64_t)end;
el_val_t lst = el_list_empty();
for (int64_t i = a; i < b; i++) lst = el_list_append(lst, (el_val_t)i);
return lst;
}
/* ── Bool helpers ────────────────────────────────────────────────────────── */
el_val_t bool_to_str(el_val_t b) {
return el_wrap_str(el_strdup(b ? "true" : "false"));
}
/* ── Process ─────────────────────────────────────────────────────────────── */
void exit_program(el_val_t code) {
exit((int)code);
}
/* ── args() — command-line argument access ──────────────────────────────────
* Compiled El programs call args() to get a list of CLI arguments.
* Call el_runtime_init_args(argc, argv) at the start of C main() to populate.
* The args list excludes argv[0] (the program name). */
static el_val_t _el_args_list = 0;
void el_runtime_init_args(int argc, char** argv) {
_el_args_list = el_list_empty();
for (int i = 1; i < argc; i++) {
_el_args_list = el_list_append(_el_args_list, EL_STR(argv[i]));
}
}
el_val_t args(void) {
if (!_el_args_list) _el_args_list = el_list_empty();
return _el_args_list;
}
/* ── CGI identity ────────────────────────────────────────────────────────────
* Called once at program start by the generated main() of a cgi {} program.
* Stores CGI identity so dharma_* builtins can reference it. */
static const char* _el_cgi_name = NULL;
static const char* _el_cgi_dharma_id = NULL;
static const char* _el_cgi_principal = NULL;
static const char* _el_cgi_network = NULL;
static const char* _el_cgi_engram = NULL;
void el_cgi_init(el_val_t name, el_val_t dharma_id, el_val_t principal,
el_val_t network, el_val_t engram) {
_el_cgi_name = EL_CSTR(name);
_el_cgi_dharma_id = EL_CSTR(dharma_id);
_el_cgi_principal = EL_CSTR(principal);
_el_cgi_network = EL_CSTR(network) ? EL_CSTR(network) : "dharma-mainnet";
_el_cgi_engram = EL_CSTR(engram) ? EL_CSTR(engram) : "http://localhost:8742";
printf("[cgi] identity: name=%s dharma_id=%s principal=%s network=%s engram=%s\n",
_el_cgi_name ? _el_cgi_name : "(unset)",
_el_cgi_dharma_id ? _el_cgi_dharma_id : "(unset)",
_el_cgi_principal ? _el_cgi_principal : "(unset)",
_el_cgi_network,
_el_cgi_engram);
}
/* ── Batch 3: Engram in-process graph store ──────────────────────────────── */
/*
* Single global EngramStore allocated lazily on first call. All node and
* edge content strings are owned (strdup'd) by the store. Linear arrays
* with doubling capacity for both nodes and edges.
*
* Activation algorithm (engram_activate):
* 1. Find seed nodes whose content/label/tags contain query (case-insens).
* 2. BFS up to `depth` hops along outgoing+incoming edges from each seed.
* 3. activation = seed.salience * product(edge_weights) * 0.7^hops
* 4. If reached by multiple paths, take max activation.
* 5. epistemic_confidence = activation * node.confidence
* 6. Filter: epistemic_confidence >= 0.2
* 7. Sort descending by activation_strength.
*/
typedef struct EngramNode {
char* id;
char* content;
char* node_type;
char* label;
char* tier;
char* tags;
char* metadata;
double salience;
double importance;
double confidence;
int64_t activation_count;
int64_t last_activated;
int64_t created_at;
int64_t updated_at;
} EngramNode;
typedef struct EngramEdge {
char* id;
char* from_id;
char* to_id;
char* relation;
char* metadata;
double weight;
double confidence;
int64_t created_at;
int64_t updated_at;
int64_t last_fired;
} EngramEdge;
typedef struct EngramStore {
EngramNode* nodes;
int64_t node_count;
int64_t node_capacity;
EngramEdge* edges;
int64_t edge_count;
int64_t edge_capacity;
} EngramStore;
static EngramStore* engram_global = NULL;
static EngramStore* engram_get(void) {
if (engram_global) return engram_global;
engram_global = calloc(1, sizeof(EngramStore));
if (!engram_global) { fputs("el_runtime: out of memory\n", stderr); exit(1); }
engram_global->node_capacity = 16;
engram_global->nodes = calloc((size_t)engram_global->node_capacity, sizeof(EngramNode));
engram_global->edge_capacity = 16;
engram_global->edges = calloc((size_t)engram_global->edge_capacity, sizeof(EngramEdge));
return engram_global;
}
static int64_t engram_now_ms(void) {
struct timeval tv; gettimeofday(&tv, NULL);
return (int64_t)tv.tv_sec * 1000LL + (int64_t)tv.tv_usec / 1000LL;
}
static EngramNode* engram_find_node(const char* id) {
if (!id) return NULL;
EngramStore* g = engram_get();
for (int64_t i = 0; i < g->node_count; i++) {
if (g->nodes[i].id && strcmp(g->nodes[i].id, id) == 0) return &g->nodes[i];
}
return NULL;
}
static int64_t engram_find_node_index(const char* id) {
if (!id) return -1;
EngramStore* g = engram_get();
for (int64_t i = 0; i < g->node_count; i++) {
if (g->nodes[i].id && strcmp(g->nodes[i].id, id) == 0) return i;
}
return -1;
}
static void engram_grow_nodes(void) {
EngramStore* g = engram_get();
if (g->node_count < g->node_capacity) return;
int64_t nc = g->node_capacity * 2;
g->nodes = realloc(g->nodes, (size_t)nc * sizeof(EngramNode));
if (!g->nodes) { fputs("el_runtime: out of memory\n", stderr); exit(1); }
memset(g->nodes + g->node_capacity, 0,
(size_t)(nc - g->node_capacity) * sizeof(EngramNode));
g->node_capacity = nc;
}
static void engram_grow_edges(void) {
EngramStore* g = engram_get();
if (g->edge_count < g->edge_capacity) return;
int64_t nc = g->edge_capacity * 2;
g->edges = realloc(g->edges, (size_t)nc * sizeof(EngramEdge));
if (!g->edges) { fputs("el_runtime: out of memory\n", stderr); exit(1); }
memset(g->edges + g->edge_capacity, 0,
(size_t)(nc - g->edge_capacity) * sizeof(EngramEdge));
g->edge_capacity = nc;
}
/* Build a fresh UUID string. Reuses uuid_new but takes the underlying char*. */
static char* engram_new_id(void) {
el_val_t v = uuid_new();
const char* s = EL_CSTR(v);
return el_strdup(s ? s : "");
}
/* Convert a node into an ElMap of its fields. */
static el_val_t engram_node_to_map(const EngramNode* n) {
el_val_t m = el_map_new(0);
m = el_map_set(m, EL_STR(el_strdup("id")), EL_STR(el_strdup(n->id ? n->id : "")));
m = el_map_set(m, EL_STR(el_strdup("content")), EL_STR(el_strdup(n->content ? n->content : "")));
m = el_map_set(m, EL_STR(el_strdup("node_type")), EL_STR(el_strdup(n->node_type ? n->node_type : "")));
m = el_map_set(m, EL_STR(el_strdup("label")), EL_STR(el_strdup(n->label ? n->label : "")));
m = el_map_set(m, EL_STR(el_strdup("tier")), EL_STR(el_strdup(n->tier ? n->tier : "Working")));
m = el_map_set(m, EL_STR(el_strdup("tags")), EL_STR(el_strdup(n->tags ? n->tags : "")));
m = el_map_set(m, EL_STR(el_strdup("metadata")), EL_STR(el_strdup(n->metadata ? n->metadata : "{}")));
m = el_map_set(m, EL_STR(el_strdup("salience")), el_from_float(n->salience));
m = el_map_set(m, EL_STR(el_strdup("importance")), el_from_float(n->importance));
m = el_map_set(m, EL_STR(el_strdup("confidence")), el_from_float(n->confidence));
m = el_map_set(m, EL_STR(el_strdup("activation_count")), (el_val_t)n->activation_count);
m = el_map_set(m, EL_STR(el_strdup("last_activated")), (el_val_t)n->last_activated);
m = el_map_set(m, EL_STR(el_strdup("created_at")), (el_val_t)n->created_at);
m = el_map_set(m, EL_STR(el_strdup("updated_at")), (el_val_t)n->updated_at);
return m;
}
/* (Node JSON serialization is provided by `engram_emit_node_json` further
* down in the persistence section — reused by the *_json builtins below.) */
static void engram_emit_node_json(JsonBuf* b, const EngramNode* n);
static void engram_emit_edge_json(JsonBuf* b, const EngramEdge* e);
/* Salience may arrive either as a float bit-pattern or as a small integer
* (e.g. 1, meaning 1.0). Heuristic: if interpreted as double it's in
* [0.0, 100.0] use it; otherwise treat as int and convert. */
static double engram_decode_score(el_val_t v) {
double f = el_to_float(v);
if (!isnan(f) && !isinf(f) && f >= 0.0 && f <= 100.0) return f;
int64_t n = (int64_t)v;
return (double)n;
}
static char* engram_first_n_chars(const char* s, size_t n) {
if (!s) return el_strdup("");
size_t l = strlen(s);
if (l > n) l = n;
char* out = el_strbuf(l);
memcpy(out, s, l);
out[l] = '\0';
return out;
}
el_val_t engram_node(el_val_t content, el_val_t node_type, el_val_t salience) {
EngramStore* g = engram_get();
engram_grow_nodes();
EngramNode* n = &g->nodes[g->node_count];
memset(n, 0, sizeof(*n));
n->id = engram_new_id();
const char* c = EL_CSTR(content);
const char* nt = EL_CSTR(node_type);
n->content = el_strdup(c ? c : "");
n->node_type = el_strdup(nt && *nt ? nt : "Memory");
n->label = engram_first_n_chars(c, 60);
n->tier = el_strdup("Working");
n->tags = el_strdup("");
n->metadata = el_strdup("{}");
n->salience = engram_decode_score(salience);
if (n->salience <= 0.0 || n->salience > 1.0) n->salience = 0.5;
n->importance = 0.5;
n->confidence = 1.0;
n->activation_count = 0;
int64_t now = engram_now_ms();
n->last_activated = now;
n->created_at = now;
n->updated_at = now;
g->node_count++;
return el_wrap_str(el_strdup(n->id));
}
el_val_t engram_node_full(el_val_t content, el_val_t node_type, el_val_t label,
el_val_t salience, el_val_t importance, el_val_t confidence,
el_val_t tier, el_val_t tags) {
EngramStore* g = engram_get();
engram_grow_nodes();
EngramNode* n = &g->nodes[g->node_count];
memset(n, 0, sizeof(*n));
n->id = engram_new_id();
const char* c = EL_CSTR(content);
const char* nt = EL_CSTR(node_type);
const char* lb = EL_CSTR(label);
const char* ti = EL_CSTR(tier);
const char* tg = EL_CSTR(tags);
n->content = el_strdup(c ? c : "");
n->node_type = el_strdup(nt && *nt ? nt : "Memory");
n->label = el_strdup(lb && *lb ? lb : (c ? engram_first_n_chars(c, 60) : ""));
n->tier = el_strdup(ti && *ti ? ti : "Working");
n->tags = el_strdup(tg ? tg : "");
n->metadata = el_strdup("{}");
n->salience = engram_decode_score(salience);
n->importance = engram_decode_score(importance);
n->confidence = engram_decode_score(confidence);
if (n->salience <= 0.0 || n->salience > 1.0) n->salience = 0.5;
if (n->importance <= 0.0 || n->importance > 1.0) n->importance = 0.5;
if (n->confidence <= 0.0 || n->confidence > 1.0) n->confidence = 1.0;
int64_t now = engram_now_ms();
n->last_activated = now;
n->created_at = now;
n->updated_at = now;
g->node_count++;
return el_wrap_str(el_strdup(n->id));
}
el_val_t engram_get_node(el_val_t id) {
const char* sid = EL_CSTR(id);
EngramNode* n = engram_find_node(sid);
if (!n) return el_map_new(0);
return engram_node_to_map(n);
}
void engram_strengthen(el_val_t node_id) {
const char* sid = EL_CSTR(node_id);
EngramNode* n = engram_find_node(sid);
if (!n) return;
n->salience += 0.05;
if (n->salience > 1.0) n->salience = 1.0;
n->activation_count++;
n->last_activated = engram_now_ms();
n->updated_at = n->last_activated;
}
void engram_forget(el_val_t node_id) {
const char* sid = EL_CSTR(node_id);
if (!sid) return;
EngramStore* g = engram_get();
int64_t idx = engram_find_node_index(sid);
if (idx < 0) return;
/* Free node strings */
EngramNode* n = &g->nodes[idx];
free(n->id); free(n->content); free(n->node_type); free(n->label);
free(n->tier); free(n->tags); free(n->metadata);
/* Shift remaining nodes down */
for (int64_t i = idx + 1; i < g->node_count; i++) {
g->nodes[i - 1] = g->nodes[i];
}
g->node_count--;
memset(&g->nodes[g->node_count], 0, sizeof(EngramNode));
/* Remove all incident edges */
int64_t w = 0;
for (int64_t r = 0; r < g->edge_count; r++) {
EngramEdge* e = &g->edges[r];
int incident = (e->from_id && strcmp(e->from_id, sid) == 0) ||
(e->to_id && strcmp(e->to_id, sid) == 0);
if (incident) {
free(e->id); free(e->from_id); free(e->to_id);
free(e->relation); free(e->metadata);
} else {
if (w != r) g->edges[w] = g->edges[r];
w++;
}
}
g->edge_count = w;
}
el_val_t engram_node_count(void) {
return (el_val_t)engram_get()->node_count;
}
static int istr_contains(const char* hay, const char* needle) {
if (!hay || !needle || !*needle) return 0;
size_t nl = strlen(needle);
for (const char* p = hay; *p; p++) {
if (strncasecmp(p, needle, nl) == 0) return 1;
}
return 0;
}
el_val_t engram_search(el_val_t query, el_val_t limit) {
EngramStore* g = engram_get();
const char* q = EL_CSTR(query);
int64_t lim = (int64_t)limit;
if (lim <= 0) lim = 100;
el_val_t lst = el_list_empty();
if (!q || !*q) return lst;
int64_t found = 0;
for (int64_t i = 0; i < g->node_count && found < lim; i++) {
EngramNode* n = &g->nodes[i];
if (istr_contains(n->content, q) ||
istr_contains(n->label, q) ||
istr_contains(n->tags, q)) {
lst = el_list_append(lst, engram_node_to_map(n));
found++;
}
}
return lst;
}
/* Sort node indices by salience desc (small N, insertion sort is fine). */
static void engram_sort_indices_by_salience(int64_t* arr, int64_t n,
const EngramNode* nodes) {
for (int64_t i = 1; i < n; i++) {
int64_t key = arr[i];
double ks = nodes[key].salience;
int64_t j = i - 1;
while (j >= 0 && nodes[arr[j]].salience < ks) {
arr[j + 1] = arr[j];
j--;
}
arr[j + 1] = key;
}
}
el_val_t engram_scan_nodes(el_val_t limit, el_val_t offset) {
EngramStore* g = engram_get();
int64_t lim = (int64_t)limit; if (lim <= 0) lim = 100;
int64_t off = (int64_t)offset; if (off < 0) off = 0;
el_val_t lst = el_list_empty();
if (g->node_count == 0) return lst;
int64_t* idx = malloc((size_t)g->node_count * sizeof(int64_t));
if (!idx) return lst;
for (int64_t i = 0; i < g->node_count; i++) idx[i] = i;
engram_sort_indices_by_salience(idx, g->node_count, g->nodes);
int64_t end = off + lim;
if (end > g->node_count) end = g->node_count;
for (int64_t i = off; i < end; i++) {
lst = el_list_append(lst, engram_node_to_map(&g->nodes[idx[i]]));
}
free(idx);
return lst;
}
void engram_connect(el_val_t from_id, el_val_t to_id, el_val_t weight, el_val_t relation) {
EngramStore* g = engram_get();
const char* f = EL_CSTR(from_id);
const char* t = EL_CSTR(to_id);
const char* r = EL_CSTR(relation);
if (!f || !t) return;
engram_grow_edges();
EngramEdge* e = &g->edges[g->edge_count];
memset(e, 0, sizeof(*e));
e->id = engram_new_id();
e->from_id = el_strdup(f);
e->to_id = el_strdup(t);
e->relation = el_strdup(r && *r ? r : "associate");
e->metadata = el_strdup("{}");
e->weight = engram_decode_score(weight);
if (e->weight <= 0.0 || e->weight > 1.0) e->weight = 0.5;
e->confidence = 1.0;
int64_t now = engram_now_ms();
e->created_at = now;
e->updated_at = now;
e->last_fired = 0;
g->edge_count++;
}
el_val_t engram_edge_between(el_val_t from_id, el_val_t to_id) {
EngramStore* g = engram_get();
const char* f = EL_CSTR(from_id);
const char* t = EL_CSTR(to_id);
if (!f || !t) return 0;
for (int64_t i = 0; i < g->edge_count; i++) {
EngramEdge* e = &g->edges[i];
if (e->from_id && e->to_id &&
strcmp(e->from_id, f) == 0 && strcmp(e->to_id, t) == 0) return 1;
}
return 0;
}
/* Reserved helper: edge -> ElMap. Kept around for future builtins. */
static el_val_t engram_edge_to_map(const EngramEdge* e) __attribute__((unused));
static el_val_t engram_edge_to_map(const EngramEdge* e) {
el_val_t m = el_map_new(0);
m = el_map_set(m, EL_STR(el_strdup("id")), EL_STR(el_strdup(e->id ? e->id : "")));
m = el_map_set(m, EL_STR(el_strdup("from_id")), EL_STR(el_strdup(e->from_id ? e->from_id : "")));
m = el_map_set(m, EL_STR(el_strdup("to_id")), EL_STR(el_strdup(e->to_id ? e->to_id : "")));
m = el_map_set(m, EL_STR(el_strdup("relation")), EL_STR(el_strdup(e->relation ? e->relation : "")));
m = el_map_set(m, EL_STR(el_strdup("metadata")), EL_STR(el_strdup(e->metadata ? e->metadata : "{}")));
m = el_map_set(m, EL_STR(el_strdup("weight")), el_from_float(e->weight));
m = el_map_set(m, EL_STR(el_strdup("confidence")), el_from_float(e->confidence));
m = el_map_set(m, EL_STR(el_strdup("created_at")), (el_val_t)e->created_at);
m = el_map_set(m, EL_STR(el_strdup("updated_at")), (el_val_t)e->updated_at);
m = el_map_set(m, EL_STR(el_strdup("last_fired")), (el_val_t)e->last_fired);
return m;
}
el_val_t engram_neighbors(el_val_t node_id) {
EngramStore* g = engram_get();
const char* sid = EL_CSTR(node_id);
el_val_t lst = el_list_empty();
if (!sid) return lst;
for (int64_t i = 0; i < g->edge_count; i++) {
EngramEdge* e = &g->edges[i];
const char* other = NULL;
if (e->from_id && strcmp(e->from_id, sid) == 0) other = e->to_id;
else if (e->to_id && strcmp(e->to_id, sid) == 0) other = e->from_id;
if (!other) continue;
EngramNode* n = engram_find_node(other);
if (n) lst = el_list_append(lst, engram_node_to_map(n));
}
return lst;
}
el_val_t engram_neighbors_filtered(el_val_t node_id, el_val_t max_depth, el_val_t direction) {
EngramStore* g = engram_get();
const char* sid = EL_CSTR(node_id);
int64_t md = (int64_t)max_depth; if (md <= 0) md = 1;
const char* dir = EL_CSTR(direction); /* "out" | "in" | "both" (default) */
el_val_t lst = el_list_empty();
if (!sid || g->node_count == 0) return lst;
int64_t start = engram_find_node_index(sid);
if (start < 0) return lst;
/* BFS with depth tracking */
int64_t* visited = calloc((size_t)g->node_count, sizeof(int64_t));
int64_t* queue = calloc((size_t)g->node_count, sizeof(int64_t));
int64_t* depths = calloc((size_t)g->node_count, sizeof(int64_t));
if (!visited || !queue || !depths) {
free(visited); free(queue); free(depths); return lst;
}
int64_t qh = 0, qt = 0;
queue[qt++] = start;
visited[start] = 1;
depths[start] = 0;
while (qh < qt) {
int64_t cur = queue[qh++];
const char* cur_id = g->nodes[cur].id;
int64_t cur_depth = depths[cur];
if (cur_depth >= md) continue;
for (int64_t i = 0; i < g->edge_count; i++) {
EngramEdge* e = &g->edges[i];
const char* other = NULL;
int outgoing = e->from_id && strcmp(e->from_id, cur_id) == 0;
int incoming = e->to_id && strcmp(e->to_id, cur_id) == 0;
if (dir && strcmp(dir, "out") == 0 && !outgoing) continue;
if (dir && strcmp(dir, "in") == 0 && !incoming) continue;
if (outgoing) other = e->to_id;
else if (incoming) other = e->from_id;
else continue;
int64_t oi = engram_find_node_index(other);
if (oi < 0 || visited[oi]) continue;
visited[oi] = 1;
depths[oi] = cur_depth + 1;
queue[qt++] = oi;
}
}
/* Emit all visited except the seed */
for (int64_t i = 0; i < g->node_count; i++) {
if (visited[i] && i != start) {
lst = el_list_append(lst, engram_node_to_map(&g->nodes[i]));
}
}
free(visited); free(queue); free(depths);
return lst;
}
el_val_t engram_edge_count(void) {
return (el_val_t)engram_get()->edge_count;
}
/* Spreading activation. Returns ElList of {node, activation_strength, hops}. */
el_val_t engram_activate(el_val_t query, el_val_t depth) {
EngramStore* g = engram_get();
const char* q = EL_CSTR(query);
int64_t max_depth = (int64_t)depth; if (max_depth <= 0) max_depth = 2;
el_val_t out = el_list_empty();
if (!q || g->node_count == 0) return out;
/* Per-node activation tracking. */
double* best_activation = calloc((size_t)g->node_count, sizeof(double));
int64_t* best_hops = calloc((size_t)g->node_count, sizeof(int64_t));
int* reached = calloc((size_t)g->node_count, sizeof(int));
if (!best_activation || !best_hops || !reached) {
free(best_activation); free(best_hops); free(reached); return out;
}
/* Find seeds */
typedef struct { int64_t idx; double act; } SeedEntry;
SeedEntry* seeds = malloc((size_t)g->node_count * sizeof(SeedEntry));
int64_t seed_count = 0;
if (!seeds) {
free(best_activation); free(best_hops); free(reached); return out;
}
for (int64_t i = 0; i < g->node_count; i++) {
EngramNode* n = &g->nodes[i];
if (istr_contains(n->content, q) ||
istr_contains(n->label, q) ||
istr_contains(n->tags, q)) {
seeds[seed_count].idx = i;
seeds[seed_count].act = n->salience;
seed_count++;
best_activation[i] = n->salience;
best_hops[i] = 0;
reached[i] = 1;
}
}
/* BFS from each seed. We'll maintain a queue of (node_idx, depth, act). */
typedef struct { int64_t idx; int64_t hops; double act; } Frontier;
Frontier* fr = malloc((size_t)(g->node_count * (max_depth + 1)) * sizeof(Frontier) + 16 * sizeof(Frontier));
if (!fr) {
free(best_activation); free(best_hops); free(reached); free(seeds); return out;
}
int64_t fhead = 0, ftail = 0;
int64_t fcap = (int64_t)((size_t)(g->node_count * (max_depth + 1)) + 16);
for (int64_t s = 0; s < seed_count; s++) {
if (ftail >= fcap) break;
fr[ftail].idx = seeds[s].idx;
fr[ftail].hops = 0;
fr[ftail].act = seeds[s].act;
ftail++;
}
const double DECAY = 0.7;
while (fhead < ftail) {
Frontier f = fr[fhead++];
if (f.hops >= max_depth) continue;
const char* cur_id = g->nodes[f.idx].id;
for (int64_t ei = 0; ei < g->edge_count; ei++) {
EngramEdge* e = &g->edges[ei];
const char* other = NULL;
if (e->from_id && strcmp(e->from_id, cur_id) == 0) other = e->to_id;
else if (e->to_id && strcmp(e->to_id, cur_id) == 0) other = e->from_id;
else continue;
int64_t oi = engram_find_node_index(other);
if (oi < 0) continue;
double new_act = f.act * e->weight * DECAY;
int64_t new_hops = f.hops + 1;
if (!reached[oi] || new_act > best_activation[oi]) {
best_activation[oi] = new_act;
best_hops[oi] = new_hops;
reached[oi] = 1;
if (ftail < fcap) {
fr[ftail].idx = oi;
fr[ftail].hops = new_hops;
fr[ftail].act = new_act;
ftail++;
}
}
}
}
/* Collect, filter by epistemic_confidence >= 0.2, sort desc by activation. */
typedef struct { int64_t idx; double act; double epist; int64_t hops; } Result;
Result* results = malloc((size_t)g->node_count * sizeof(Result));
int64_t rcount = 0;
if (!results) {
free(best_activation); free(best_hops); free(reached); free(seeds); free(fr);
return out;
}
for (int64_t i = 0; i < g->node_count; i++) {
if (!reached[i]) continue;
double epist = best_activation[i] * g->nodes[i].confidence;
if (epist < 0.2) continue;
results[rcount].idx = i;
results[rcount].act = best_activation[i];
results[rcount].epist = epist;
results[rcount].hops = best_hops[i];
rcount++;
}
/* Insertion sort by act desc. */
for (int64_t i = 1; i < rcount; i++) {
Result key = results[i];
int64_t j = i - 1;
while (j >= 0 && results[j].act < key.act) {
results[j + 1] = results[j];
j--;
}
results[j + 1] = key;
}
for (int64_t i = 0; i < rcount; i++) {
el_val_t entry = el_map_new(0);
entry = el_map_set(entry, EL_STR(el_strdup("node")),
engram_node_to_map(&g->nodes[results[i].idx]));
entry = el_map_set(entry, EL_STR(el_strdup("activation_strength")),
el_from_float(results[i].act));
entry = el_map_set(entry, EL_STR(el_strdup("epistemic_confidence")),
el_from_float(results[i].epist));
entry = el_map_set(entry, EL_STR(el_strdup("hops")),
(el_val_t)results[i].hops);
out = el_list_append(out, entry);
}
free(best_activation); free(best_hops); free(reached);
free(seeds); free(fr); free(results);
return out;
}
/* ── Engram persistence (JSON snapshot) ─────────────────────────────────── */
static void engram_emit_node_json(JsonBuf* b, const EngramNode* n) {
jb_putc(b, '{');
jb_puts(b, "\"id\":"); jb_emit_escaped(b, n->id ? n->id : "");
jb_puts(b, ",\"content\":"); jb_emit_escaped(b, n->content ? n->content : "");
jb_puts(b, ",\"node_type\":"); jb_emit_escaped(b, n->node_type ? n->node_type : "");
jb_puts(b, ",\"label\":"); jb_emit_escaped(b, n->label ? n->label : "");
jb_puts(b, ",\"tier\":"); jb_emit_escaped(b, n->tier ? n->tier : "Working");
jb_puts(b, ",\"tags\":"); jb_emit_escaped(b, n->tags ? n->tags : "");
jb_puts(b, ",\"metadata\":"); jb_emit_escaped(b, n->metadata ? n->metadata : "{}");
char tmp[64];
snprintf(tmp, sizeof(tmp), ",\"salience\":%g", n->salience); jb_puts(b, tmp);
snprintf(tmp, sizeof(tmp), ",\"importance\":%g", n->importance); jb_puts(b, tmp);
snprintf(tmp, sizeof(tmp), ",\"confidence\":%g", n->confidence); jb_puts(b, tmp);
snprintf(tmp, sizeof(tmp), ",\"activation_count\":%lld", (long long)n->activation_count); jb_puts(b, tmp);
snprintf(tmp, sizeof(tmp), ",\"last_activated\":%lld", (long long)n->last_activated); jb_puts(b, tmp);
snprintf(tmp, sizeof(tmp), ",\"created_at\":%lld", (long long)n->created_at); jb_puts(b, tmp);
snprintf(tmp, sizeof(tmp), ",\"updated_at\":%lld", (long long)n->updated_at); jb_puts(b, tmp);
jb_putc(b, '}');
}
static void engram_emit_edge_json(JsonBuf* b, const EngramEdge* e) {
jb_putc(b, '{');
jb_puts(b, "\"id\":"); jb_emit_escaped(b, e->id ? e->id : "");
jb_puts(b, ",\"from_id\":"); jb_emit_escaped(b, e->from_id ? e->from_id : "");
jb_puts(b, ",\"to_id\":"); jb_emit_escaped(b, e->to_id ? e->to_id : "");
jb_puts(b, ",\"relation\":"); jb_emit_escaped(b, e->relation ? e->relation : "");
jb_puts(b, ",\"metadata\":"); jb_emit_escaped(b, e->metadata ? e->metadata : "{}");
char tmp[64];
snprintf(tmp, sizeof(tmp), ",\"weight\":%g", e->weight); jb_puts(b, tmp);
snprintf(tmp, sizeof(tmp), ",\"confidence\":%g", e->confidence); jb_puts(b, tmp);
snprintf(tmp, sizeof(tmp), ",\"created_at\":%lld", (long long)e->created_at); jb_puts(b, tmp);
snprintf(tmp, sizeof(tmp), ",\"updated_at\":%lld", (long long)e->updated_at); jb_puts(b, tmp);
snprintf(tmp, sizeof(tmp), ",\"last_fired\":%lld", (long long)e->last_fired); jb_puts(b, tmp);
jb_putc(b, '}');
}
el_val_t engram_save(el_val_t path) {
const char* p = EL_CSTR(path);
if (!p || !*p) return 0;
EngramStore* g = engram_get();
JsonBuf b; jb_init(&b);
jb_puts(&b, "{\"nodes\":[");
for (int64_t i = 0; i < g->node_count; i++) {
if (i > 0) jb_putc(&b, ',');
engram_emit_node_json(&b, &g->nodes[i]);
}
jb_puts(&b, "],\"edges\":[");
for (int64_t i = 0; i < g->edge_count; i++) {
if (i > 0) jb_putc(&b, ',');
engram_emit_edge_json(&b, &g->edges[i]);
}
jb_puts(&b, "]}");
FILE* f = fopen(p, "wb");
if (!f) { free(b.buf); return 0; }
size_t w = fwrite(b.buf, 1, b.len, f);
fclose(f);
int ok = (w == b.len);
free(b.buf);
return ok ? 1 : 0;
}
/* Helper: extract a string field from a JSON object substring. */
static char* eg_get_str_field(const char* obj, const char* key) {
const char* p = json_find_key(obj, key);
if (!p) return el_strdup("");
if (*p != '"') return el_strdup("");
JsonParser jp = { .p = p, .end = p + strlen(p), .err = 0 };
char* out = jp_parse_string_raw(&jp);
if (jp.err) { free(out); return el_strdup(""); }
return out;
}
static double eg_get_num_field(const char* obj, const char* key) {
const char* p = json_find_key(obj, key);
if (!p || *p == '"' || *p == '{' || *p == '[') return 0.0;
return strtod(p, NULL);
}
static int64_t eg_get_int_field(const char* obj, const char* key) {
const char* p = json_find_key(obj, key);
if (!p || *p == '"' || *p == '{' || *p == '[') return 0;
return strtoll(p, NULL, 10);
}
/* Iterate the top-level nodes/edges arrays in a saved snapshot. */
static const char* eg_skip_ws(const char* p) {
while (*p == ' ' || *p == '\t' || *p == '\n' || *p == '\r') p++;
return p;
}
el_val_t engram_load(el_val_t path) {
const char* p = EL_CSTR(path);
if (!p || !*p) return 0;
FILE* f = fopen(p, "rb");
if (!f) return 0;
fseek(f, 0, SEEK_END);
long sz = ftell(f);
rewind(f);
if (sz <= 0) { fclose(f); return 0; }
char* data = malloc((size_t)sz + 1);
if (!data) { fclose(f); return 0; }
size_t got = fread(data, 1, (size_t)sz, f);
fclose(f);
data[got] = '\0';
/* Reset store */
EngramStore* g = engram_get();
for (int64_t i = 0; i < g->node_count; i++) {
free(g->nodes[i].id); free(g->nodes[i].content); free(g->nodes[i].node_type);
free(g->nodes[i].label); free(g->nodes[i].tier); free(g->nodes[i].tags);
free(g->nodes[i].metadata);
}
g->node_count = 0;
for (int64_t i = 0; i < g->edge_count; i++) {
free(g->edges[i].id); free(g->edges[i].from_id); free(g->edges[i].to_id);
free(g->edges[i].relation); free(g->edges[i].metadata);
}
g->edge_count = 0;
/* Walk nodes array */
const char* nodes_p = json_find_key(data, "nodes");
if (nodes_p) {
nodes_p = eg_skip_ws(nodes_p);
if (*nodes_p == '[') {
nodes_p++;
nodes_p = eg_skip_ws(nodes_p);
while (*nodes_p && *nodes_p != ']') {
if (*nodes_p != '{') { nodes_p++; continue; }
const char* end = json_skip_value(nodes_p);
size_t n = (size_t)(end - nodes_p);
char* obj = malloc(n + 1);
memcpy(obj, nodes_p, n); obj[n] = '\0';
engram_grow_nodes();
EngramNode* nn = &g->nodes[g->node_count];
memset(nn, 0, sizeof(*nn));
nn->id = eg_get_str_field(obj, "id");
nn->content = eg_get_str_field(obj, "content");
nn->node_type = eg_get_str_field(obj, "node_type");
nn->label = eg_get_str_field(obj, "label");
nn->tier = eg_get_str_field(obj, "tier");
nn->tags = eg_get_str_field(obj, "tags");
nn->metadata = eg_get_str_field(obj, "metadata");
if (!nn->metadata || !*nn->metadata) { free(nn->metadata); nn->metadata = el_strdup("{}"); }
nn->salience = eg_get_num_field(obj, "salience");
nn->importance = eg_get_num_field(obj, "importance");
nn->confidence = eg_get_num_field(obj, "confidence");
nn->activation_count = eg_get_int_field(obj, "activation_count");
nn->last_activated = eg_get_int_field(obj, "last_activated");
nn->created_at = eg_get_int_field(obj, "created_at");
nn->updated_at = eg_get_int_field(obj, "updated_at");
g->node_count++;
free(obj);
nodes_p = end;
nodes_p = eg_skip_ws(nodes_p);
if (*nodes_p == ',') { nodes_p++; nodes_p = eg_skip_ws(nodes_p); }
}
}
}
/* Walk edges array */
const char* edges_p = json_find_key(data, "edges");
if (edges_p) {
edges_p = eg_skip_ws(edges_p);
if (*edges_p == '[') {
edges_p++;
edges_p = eg_skip_ws(edges_p);
while (*edges_p && *edges_p != ']') {
if (*edges_p != '{') { edges_p++; continue; }
const char* end = json_skip_value(edges_p);
size_t n = (size_t)(end - edges_p);
char* obj = malloc(n + 1);
memcpy(obj, edges_p, n); obj[n] = '\0';
engram_grow_edges();
EngramEdge* ee = &g->edges[g->edge_count];
memset(ee, 0, sizeof(*ee));
ee->id = eg_get_str_field(obj, "id");
ee->from_id = eg_get_str_field(obj, "from_id");
ee->to_id = eg_get_str_field(obj, "to_id");
ee->relation = eg_get_str_field(obj, "relation");
ee->metadata = eg_get_str_field(obj, "metadata");
if (!ee->metadata || !*ee->metadata) { free(ee->metadata); ee->metadata = el_strdup("{}"); }
ee->weight = eg_get_num_field(obj, "weight");
ee->confidence = eg_get_num_field(obj, "confidence");
ee->created_at = eg_get_int_field(obj, "created_at");
ee->updated_at = eg_get_int_field(obj, "updated_at");
ee->last_fired = eg_get_int_field(obj, "last_fired");
g->edge_count++;
free(obj);
edges_p = end;
edges_p = eg_skip_ws(edges_p);
if (*edges_p == ',') { edges_p++; edges_p = eg_skip_ws(edges_p); }
}
}
}
free(data);
return 1;
}
/* ── Engram JSON-string accessors ─────────────────────────────────────────
* These return pre-serialized JSON strings so callers (especially HTTP
* handlers) don't have to round-trip ElList/ElMap through json_stringify
* — which can't reliably distinguish those structures from raw pointers
* due to el_val_t's type erasure. The runtime knows the real C types and
* can serialize directly. */
el_val_t engram_get_node_json(el_val_t id) {
const char* sid = EL_CSTR(id);
EngramNode* n = engram_find_node(sid);
if (!n) return el_wrap_str(el_strdup("{}"));
JsonBuf b; jb_init(&b);
engram_emit_node_json(&b, n);
return el_wrap_str(b.buf);
}
el_val_t engram_search_json(el_val_t query, el_val_t limit) {
EngramStore* g = engram_get();
const char* q = EL_CSTR(query);
int64_t lim = (int64_t)limit;
if (lim <= 0) lim = 100;
JsonBuf b; jb_init(&b);
jb_putc(&b, '[');
int first = 1;
int64_t found = 0;
if (q && *q) {
for (int64_t i = 0; i < g->node_count && found < lim; i++) {
EngramNode* n = &g->nodes[i];
if (istr_contains(n->content, q) ||
istr_contains(n->label, q) ||
istr_contains(n->tags, q)) {
if (!first) jb_putc(&b, ',');
engram_emit_node_json(&b, n);
first = 0;
found++;
}
}
}
jb_putc(&b, ']');
return el_wrap_str(b.buf);
}
el_val_t engram_scan_nodes_json(el_val_t limit, el_val_t offset) {
EngramStore* g = engram_get();
int64_t lim = (int64_t)limit; if (lim <= 0) lim = 100;
int64_t off = (int64_t)offset; if (off < 0) off = 0;
JsonBuf b; jb_init(&b);
jb_putc(&b, '[');
if (g->node_count == 0) { jb_putc(&b, ']'); return el_wrap_str(b.buf); }
int64_t* idx = malloc((size_t)g->node_count * sizeof(int64_t));
if (!idx) { jb_putc(&b, ']'); return el_wrap_str(b.buf); }
for (int64_t i = 0; i < g->node_count; i++) idx[i] = i;
engram_sort_indices_by_salience(idx, g->node_count, g->nodes);
int64_t end = off + lim;
if (end > g->node_count) end = g->node_count;
int first = 1;
for (int64_t i = off; i < end; i++) {
if (!first) jb_putc(&b, ',');
engram_emit_node_json(&b, &g->nodes[idx[i]]);
first = 0;
}
free(idx);
jb_putc(&b, ']');
return el_wrap_str(b.buf);
}
el_val_t engram_neighbors_json(el_val_t node_id, el_val_t max_depth, el_val_t direction) {
/* Re-implement here directly so we serialize without going through
* the ElList path. Walks BFS to max_depth, emits {node, edge, hops}
* triples. */
EngramStore* g = engram_get();
const char* sid = EL_CSTR(node_id);
int64_t depth = (int64_t)max_depth; if (depth <= 0) depth = 1;
const char* dir = EL_CSTR(direction); if (!dir) dir = "both";
int allow_out = (strcmp(dir, "out") == 0) || (strcmp(dir, "both") == 0);
int allow_in = (strcmp(dir, "in") == 0) || (strcmp(dir, "both") == 0);
JsonBuf b; jb_init(&b);
jb_putc(&b, '[');
if (!sid || !*sid) { jb_putc(&b, ']'); return el_wrap_str(b.buf); }
/* Frontier of (node_id, hops). Cap to a sane size. */
char** frontier = calloc(1024, sizeof(char*));
int64_t* frontier_h = calloc(1024, sizeof(int64_t));
int64_t fc = 0;
char** visited = calloc(1024, sizeof(char*));
int64_t vc = 0;
if (!frontier || !frontier_h || !visited) {
free(frontier); free(frontier_h); free(visited);
jb_putc(&b, ']'); return el_wrap_str(b.buf);
}
frontier[fc] = el_strdup(sid); frontier_h[fc] = 0; fc++;
visited[vc++] = el_strdup(sid);
int first = 1;
while (fc > 0) {
char* cur = frontier[0]; int64_t h = frontier_h[0];
for (int64_t k = 1; k < fc; k++) { frontier[k-1] = frontier[k]; frontier_h[k-1] = frontier_h[k]; }
fc--;
if (h >= depth) { free(cur); continue; }
for (int64_t i = 0; i < g->edge_count; i++) {
EngramEdge* e = &g->edges[i];
const char* peer = NULL;
if (allow_out && e->from_id && strcmp(e->from_id, cur) == 0) peer = e->to_id;
else if (allow_in && e->to_id && strcmp(e->to_id, cur) == 0) peer = e->from_id;
if (!peer) continue;
int seen = 0;
for (int64_t v = 0; v < vc; v++) {
if (strcmp(visited[v], peer) == 0) { seen = 1; break; }
}
if (seen) continue;
EngramNode* n = engram_find_node(peer);
if (!n) continue;
if (!first) jb_putc(&b, ',');
jb_puts(&b, "{\"node\":");
engram_emit_node_json(&b, n);
jb_puts(&b, ",\"edge\":");
engram_emit_edge_json(&b, e);
char tmp[64]; snprintf(tmp, sizeof(tmp), ",\"hops\":%lld}", (long long)(h + 1));
jb_puts(&b, tmp);
first = 0;
if (vc < 1024) visited[vc++] = el_strdup(peer);
if (fc < 1024 && h + 1 < depth) { frontier[fc] = el_strdup(peer); frontier_h[fc] = h + 1; fc++; }
}
free(cur);
}
for (int64_t i = 0; i < fc; i++) free(frontier[i]);
for (int64_t i = 0; i < vc; i++) free(visited[i]);
free(frontier); free(frontier_h); free(visited);
jb_putc(&b, ']');
return el_wrap_str(b.buf);
}
el_val_t engram_activate_json(el_val_t query, el_val_t depth) {
/* Run the existing engram_activate to get the ElList of result maps,
* then walk that list and serialize each entry into JSON manually.
* We have the raw nodes via engram_find_node, so we can re-emit
* directly without trusting json_stringify on the ElMap. */
el_val_t lst = engram_activate(query, depth);
ElList* arr = (ElList*)(uintptr_t)lst;
JsonBuf b; jb_init(&b);
jb_putc(&b, '[');
if (arr) {
for (int64_t i = 0; i < arr->length; i++) {
ElMap* entry = (ElMap*)(uintptr_t)arr->elems[i];
if (!entry) continue;
/* The entry map has keys: "node" (ElMap), "activation_strength"
* (Float bit-pattern), "hops" (Int). Read them from the map
* directly using el_map_get with EL_STR keys. */
el_val_t node_map = el_map_get(arr->elems[i], EL_STR("node"));
el_val_t strength_v = el_map_get(arr->elems[i], EL_STR("activation_strength"));
el_val_t hops_v = el_map_get(arr->elems[i], EL_STR("hops"));
/* Look up the underlying EngramNode by id field of the map */
el_val_t id_v = el_map_get(node_map, EL_STR("id"));
const char* id_s = EL_CSTR(id_v);
EngramNode* n = id_s ? engram_find_node(id_s) : NULL;
if (i > 0) jb_putc(&b, ',');
jb_puts(&b, "{\"node\":");
if (n) {
engram_emit_node_json(&b, n);
} else {
jb_puts(&b, "{}");
}
char tmp[64];
snprintf(tmp, sizeof(tmp), ",\"activation_strength\":%g", el_to_float(strength_v));
jb_puts(&b, tmp);
snprintf(tmp, sizeof(tmp), ",\"hops\":%lld}", (long long)(int64_t)hops_v);
jb_puts(&b, tmp);
}
}
jb_putc(&b, ']');
return el_wrap_str(b.buf);
}
el_val_t engram_stats_json(void) {
EngramStore* g = engram_get();
char buf[128];
snprintf(buf, sizeof(buf),
"{\"node_count\":%lld,\"edge_count\":%lld}",
(long long)g->node_count, (long long)g->edge_count);
return el_wrap_str(el_strdup(buf));
}
/* ── DHARMA network ─────────────────────────────────────────────────────────
* Real implementation. Peers are addressed by `dharma_id` — either bare
* (e.g. "ntn-genesis", transport defaults to http://localhost:7770) or
* "<id>@<url>" where <url> is the peer's Engram-exposed daemon.
*
* Channels are logical handles cached per-cgi: `dharma_connect` is
* idempotent and returns "ch:<cgi_id>". The channel registry below tracks
* every cgi_id we've connected to and its resolved transport URL.
*
* Relationship weights live in the local Engram graph: edges of type
* "dharma-relation" between a synthetic local node ("dharma:self") and
* synthetic peer nodes ("dharma:peer:<cgi_id>"). Hebbian increments
* accumulate in EngramEdge.weight, clamped to [0.0, 1.0].
*
* Events arrive over HTTP via the application's request handler, which is
* expected to call el_runtime_dharma_event_arrive() when it sees a
* /dharma/event POST. dharma_field() blocks on a per-event-type queue.
*/
#define DHARMA_DEFAULT_URL "http://localhost:7770"
/* Channel registry — one entry per known peer. */
typedef struct DharmaChannel {
char* cgi_id; /* full dharma_id including any @<url> suffix */
char* base_id; /* registry-id portion (before @) for relationship lookup */
char* url; /* resolved transport URL */
char* channel_id; /* "ch:<cgi_id>" */
} DharmaChannel;
static DharmaChannel* _dharma_channels = NULL;
static size_t _dharma_channel_count = 0;
static size_t _dharma_channel_cap = 0;
static pthread_mutex_t _dharma_channel_mu = PTHREAD_MUTEX_INITIALIZER;
/* Event queue — per-type linked list. dharma_field blocks on _dharma_event_cv. */
typedef struct DharmaEvent {
char* event_type;
char* payload;
char* source;
int64_t timestamp;
struct DharmaEvent* next;
} DharmaEvent;
static DharmaEvent* _dharma_event_head = NULL;
static DharmaEvent* _dharma_event_tail = NULL;
static pthread_mutex_t _dharma_event_mu = PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t _dharma_event_cv = PTHREAD_COND_INITIALIZER;
/* Split "<id>@<url>" → (base_id, url). If no "@", base_id = full, url = default.
* Returned strings are heap-allocated; caller must free. */
static void dharma_parse_id(const char* full, char** out_base, char** out_url) {
if (!full) full = "";
const char* at = strchr(full, '@');
if (at) {
size_t bn = (size_t)(at - full);
char* b = malloc(bn + 1);
memcpy(b, full, bn); b[bn] = '\0';
*out_base = b;
*out_url = el_strdup(at + 1);
if (!**out_url) { free(*out_url); *out_url = el_strdup(DHARMA_DEFAULT_URL); }
} else {
*out_base = el_strdup(full);
*out_url = el_strdup(DHARMA_DEFAULT_URL);
}
}
/* Find existing channel by full cgi_id. Caller must hold _dharma_channel_mu. */
static DharmaChannel* dharma_find_channel_locked(const char* cgi_id) {
if (!cgi_id) return NULL;
for (size_t i = 0; i < _dharma_channel_count; i++) {
if (_dharma_channels[i].cgi_id &&
strcmp(_dharma_channels[i].cgi_id, cgi_id) == 0) {
return &_dharma_channels[i];
}
}
return NULL;
}
/* Add a new channel entry. Caller must hold _dharma_channel_mu. */
static DharmaChannel* dharma_add_channel_locked(const char* cgi_id) {
if (_dharma_channel_count >= _dharma_channel_cap) {
size_t nc = _dharma_channel_cap ? _dharma_channel_cap * 2 : 8;
_dharma_channels = realloc(_dharma_channels, nc * sizeof(DharmaChannel));
if (!_dharma_channels) { fputs("el_runtime: out of memory\n", stderr); exit(1); }
memset(_dharma_channels + _dharma_channel_cap, 0,
(nc - _dharma_channel_cap) * sizeof(DharmaChannel));
_dharma_channel_cap = nc;
}
DharmaChannel* ch = &_dharma_channels[_dharma_channel_count++];
char* base = NULL; char* url = NULL;
dharma_parse_id(cgi_id, &base, &url);
ch->cgi_id = el_strdup(cgi_id ? cgi_id : "");
ch->base_id = base;
ch->url = url;
size_t cn = strlen(ch->cgi_id) + 4;
ch->channel_id = malloc(cn);
snprintf(ch->channel_id, cn, "ch:%s", ch->cgi_id);
return ch;
}
el_val_t dharma_connect(el_val_t cgi_id) {
const char* id = EL_CSTR(cgi_id);
if (!id || !*id) return el_wrap_str(el_strdup(""));
pthread_mutex_lock(&_dharma_channel_mu);
DharmaChannel* ch = dharma_find_channel_locked(id);
if (!ch) ch = dharma_add_channel_locked(id);
char* out = el_strdup(ch->channel_id);
pthread_mutex_unlock(&_dharma_channel_mu);
return el_wrap_str(out);
}
/* Build an error JSON body — same shape http_error_json uses. */
static el_val_t dharma_error_json(const char* msg) {
return http_error_json(msg);
}
el_val_t dharma_send(el_val_t channel, el_val_t content) {
const char* ch_id = EL_CSTR(channel);
const char* msg = EL_CSTR(content);
if (!ch_id || strncmp(ch_id, "ch:", 3) != 0) {
return dharma_error_json("invalid channel");
}
const char* peer_id = ch_id + 3;
/* Look up channel; if unknown (caller fabricated), auto-register. */
pthread_mutex_lock(&_dharma_channel_mu);
DharmaChannel* ch = dharma_find_channel_locked(peer_id);
if (!ch) ch = dharma_add_channel_locked(peer_id);
char* url = el_strdup(ch->url);
pthread_mutex_unlock(&_dharma_channel_mu);
/* Build /dharma/recv body. */
const char* from = _el_cgi_dharma_id ? _el_cgi_dharma_id : "(unknown)";
char* esc_ch = json_escape_alloc(ch_id);
char* esc_from = json_escape_alloc(from);
char* esc_msg = json_escape_alloc(msg ? msg : "");
JsonBuf b; jb_init(&b);
jb_puts(&b, "{\"channel\":\""); jb_puts(&b, esc_ch);
jb_puts(&b, "\",\"from\":\""); jb_puts(&b, esc_from);
jb_puts(&b, "\",\"content\":\""); jb_puts(&b, esc_msg);
jb_puts(&b, "\"}");
free(esc_ch); free(esc_from); free(esc_msg);
size_t ul = strlen(url) + 16;
char* full_url = malloc(ul);
snprintf(full_url, ul, "%s/dharma/recv", url);
struct curl_slist* h = NULL;
h = curl_slist_append(h, "Content-Type: application/json");
el_val_t resp = http_do("POST", full_url, b.buf, h);
curl_slist_free_all(h);
free(b.buf); free(full_url); free(url);
return resp;
}
el_val_t dharma_activate(el_val_t query) {
const char* q = EL_CSTR(query);
if (!q) q = "";
el_val_t out = el_list_empty();
char* esc_q = json_escape_alloc(q);
JsonBuf body; jb_init(&body);
jb_puts(&body, "{\"query\":\""); jb_puts(&body, esc_q); jb_puts(&body, "\"}");
free(esc_q);
/* Snapshot the channel list under lock so we can iterate without
* holding the mutex during network I/O. */
pthread_mutex_lock(&_dharma_channel_mu);
size_t n = _dharma_channel_count;
char** urls = calloc(n ? n : 1, sizeof(char*));
char** ids = calloc(n ? n : 1, sizeof(char*));
char** bases = calloc(n ? n : 1, sizeof(char*));
for (size_t i = 0; i < n; i++) {
urls[i] = el_strdup(_dharma_channels[i].url);
ids[i] = el_strdup(_dharma_channels[i].cgi_id);
bases[i] = el_strdup(_dharma_channels[i].base_id);
}
pthread_mutex_unlock(&_dharma_channel_mu);
for (size_t i = 0; i < n; i++) {
size_t ul = strlen(urls[i]) + 32;
char* full_url = malloc(ul);
snprintf(full_url, ul, "%s/api/activate", urls[i]);
struct curl_slist* h = NULL;
h = curl_slist_append(h, "Content-Type: application/json");
el_val_t resp = http_do("POST", full_url, body.buf, h);
curl_slist_free_all(h);
free(full_url);
const char* rs = EL_CSTR(resp);
if (!rs || !*rs) continue;
if (rs[0] == '{' && strstr(rs, "\"error\"")) continue;
/* Look up relationship weight (attenuation). */
double rel_weight = 1.0;
{
const char* self_id = "dharma:self";
char peer_node[512];
snprintf(peer_node, sizeof(peer_node), "dharma:peer:%s", bases[i]);
EngramStore* g = engram_get();
for (int64_t k = 0; k < g->edge_count; k++) {
EngramEdge* e = &g->edges[k];
if (e->from_id && e->to_id &&
strcmp(e->from_id, self_id) == 0 &&
strcmp(e->to_id, peer_node) == 0 &&
e->relation && strcmp(e->relation, "dharma-relation") == 0) {
rel_weight = e->weight;
break;
}
}
}
/* Iterate the response array. Expect either a top-level array
* or an object whose "results" field is an array. */
const char* arr = rs;
while (*arr == ' ' || *arr == '\t' || *arr == '\n' || *arr == '\r') arr++;
char* arr_owned = NULL;
if (*arr == '{') {
el_val_t r = json_get_raw(EL_STR(rs), EL_STR("results"));
const char* rr = EL_CSTR(r);
if (rr && *rr == '[') {
arr_owned = el_strdup(rr);
arr = arr_owned;
} else {
continue;
}
}
if (*arr != '[') { free(arr_owned); continue; }
const char* p = arr + 1;
while (*p == ' ' || *p == '\t' || *p == '\n' || *p == '\r') p++;
while (*p && *p != ']') {
const char* end = json_skip_value(p);
size_t en = (size_t)(end - p);
char* obj = el_strbuf(en);
memcpy(obj, p, en); obj[en] = '\0';
/* Pull activation_strength if present, else 1.0. */
el_val_t act_v = json_get_float(EL_STR(obj), EL_STR("activation_strength"));
double act = el_to_float(act_v);
if (!(act > 0.0 && act <= 100.0)) act = 1.0;
double final_act = act * rel_weight;
el_val_t entry = el_map_new(0);
/* node = the inner JSON if present, else the entire obj. */
el_val_t node_raw = json_get_raw(EL_STR(obj), EL_STR("node"));
const char* nr = EL_CSTR(node_raw);
entry = el_map_set(entry, EL_STR(el_strdup("node")),
(nr && *nr) ? node_raw : EL_STR(el_strdup(obj)));
entry = el_map_set(entry, EL_STR(el_strdup("source_cgi")),
EL_STR(el_strdup(ids[i])));
entry = el_map_set(entry, EL_STR(el_strdup("activation_strength")),
el_from_float(final_act));
out = el_list_append(out, entry);
free(obj);
p = end;
while (*p == ' ' || *p == '\t' || *p == '\n' || *p == '\r' || *p == ',') p++;
}
free(arr_owned);
}
for (size_t i = 0; i < n; i++) { free(urls[i]); free(ids[i]); free(bases[i]); }
free(urls); free(ids); free(bases);
free(body.buf);
return out;
}
void dharma_emit(el_val_t event_type, el_val_t payload) {
const char* et = EL_CSTR(event_type);
const char* pay = EL_CSTR(payload);
if (!et) et = "";
if (!pay) pay = "";
const char* src = _el_cgi_dharma_id ? _el_cgi_dharma_id : "(unknown)";
int64_t ts = engram_now_ms();
char* esc_et = json_escape_alloc(et);
char* esc_pay = json_escape_alloc(pay);
char* esc_src = json_escape_alloc(src);
JsonBuf b; jb_init(&b);
jb_puts(&b, "{\"type\":\""); jb_puts(&b, esc_et);
jb_puts(&b, "\",\"payload\":\""); jb_puts(&b, esc_pay);
jb_puts(&b, "\",\"source\":\""); jb_puts(&b, esc_src);
jb_puts(&b, "\",\"timestamp\":"); jb_emit_int(&b, ts);
jb_putc(&b, '}');
free(esc_et); free(esc_pay); free(esc_src);
/* Snapshot URLs to avoid holding the channel mutex during I/O. */
pthread_mutex_lock(&_dharma_channel_mu);
size_t n = _dharma_channel_count;
char** urls = calloc(n ? n : 1, sizeof(char*));
for (size_t i = 0; i < n; i++) urls[i] = el_strdup(_dharma_channels[i].url);
pthread_mutex_unlock(&_dharma_channel_mu);
for (size_t i = 0; i < n; i++) {
size_t ul = strlen(urls[i]) + 32;
char* full_url = malloc(ul);
snprintf(full_url, ul, "%s/dharma/event", urls[i]);
struct curl_slist* h = NULL;
h = curl_slist_append(h, "Content-Type: application/json");
el_val_t r = http_do("POST", full_url, b.buf, h);
(void)r; /* fire-and-forget — emit is not synchronous */
curl_slist_free_all(h);
free(full_url);
}
for (size_t i = 0; i < n; i++) free(urls[i]);
free(urls);
free(b.buf);
}
void el_runtime_dharma_event_arrive(const char* event_type, const char* payload,
const char* source) {
DharmaEvent* ev = calloc(1, sizeof(DharmaEvent));
if (!ev) return;
ev->event_type = el_strdup(event_type ? event_type : "");
ev->payload = el_strdup(payload ? payload : "");
ev->source = el_strdup(source ? source : "");
ev->timestamp = engram_now_ms();
ev->next = NULL;
pthread_mutex_lock(&_dharma_event_mu);
if (_dharma_event_tail) _dharma_event_tail->next = ev;
else _dharma_event_head = ev;
_dharma_event_tail = ev;
pthread_cond_broadcast(&_dharma_event_cv);
pthread_mutex_unlock(&_dharma_event_mu);
}
el_val_t dharma_field(el_val_t event_type) {
const char* et = EL_CSTR(event_type);
if (!et) et = "";
/* Compute deadline: now + 30 seconds. */
struct timespec deadline;
clock_gettime(CLOCK_REALTIME, &deadline);
deadline.tv_sec += 30;
DharmaEvent* found = NULL;
pthread_mutex_lock(&_dharma_event_mu);
while (1) {
/* Scan queue for matching type; pop and return first match. */
DharmaEvent* prev = NULL;
DharmaEvent* cur = _dharma_event_head;
while (cur) {
if (cur->event_type && strcmp(cur->event_type, et) == 0) {
if (prev) prev->next = cur->next;
else _dharma_event_head = cur->next;
if (_dharma_event_tail == cur) _dharma_event_tail = prev;
cur->next = NULL;
found = cur;
break;
}
prev = cur; cur = cur->next;
}
if (found) break;
int rc = pthread_cond_timedwait(&_dharma_event_cv, &_dharma_event_mu, &deadline);
if (rc == ETIMEDOUT) break;
}
pthread_mutex_unlock(&_dharma_event_mu);
if (!found) return el_map_new(0);
el_val_t m = el_map_new(0);
m = el_map_set(m, EL_STR(el_strdup("type")),
EL_STR(el_strdup(found->event_type ? found->event_type : "")));
m = el_map_set(m, EL_STR(el_strdup("payload")),
EL_STR(el_strdup(found->payload ? found->payload : "")));
m = el_map_set(m, EL_STR(el_strdup("source_cgi")),
EL_STR(el_strdup(found->source ? found->source : "")));
m = el_map_set(m, EL_STR(el_strdup("timestamp")), (el_val_t)found->timestamp);
free(found->event_type); free(found->payload); free(found->source); free(found);
return m;
}
/* Locate (or create) the local "dharma:self" node and the synthetic peer
* node "dharma:peer:<base_id>". Returns the index of the dharma-relation
* edge, or -1 if not found. If `create` is non-zero, ensure the nodes
* and edge exist (creating them as needed) and return the edge index. */
static int64_t dharma_find_or_create_relation_edge(const char* peer_base, int create) {
if (!peer_base || !*peer_base) return -1;
EngramStore* g = engram_get();
const char* self_id = "dharma:self";
char peer_node[512];
snprintf(peer_node, sizeof(peer_node), "dharma:peer:%s", peer_base);
/* Look for the edge first. */
for (int64_t i = 0; i < g->edge_count; i++) {
EngramEdge* e = &g->edges[i];
if (e->from_id && e->to_id &&
strcmp(e->from_id, self_id) == 0 &&
strcmp(e->to_id, peer_node) == 0 &&
e->relation && strcmp(e->relation, "dharma-relation") == 0) {
return i;
}
}
if (!create) return -1;
/* Ensure self node exists. We use a fixed id (not engram_new_id) so
* subsequent calls reuse the same one. */
if (!engram_find_node(self_id)) {
engram_grow_nodes();
EngramNode* n = &g->nodes[g->node_count];
memset(n, 0, sizeof(*n));
n->id = el_strdup(self_id);
n->content = el_strdup(_el_cgi_dharma_id ? _el_cgi_dharma_id : "(self)");
n->node_type = el_strdup("DharmaSelf");
n->label = el_strdup("dharma:self");
n->tier = el_strdup("Working");
n->tags = el_strdup("dharma");
n->metadata = el_strdup("{}");
n->salience = 1.0; n->importance = 1.0; n->confidence = 1.0;
int64_t now = engram_now_ms();
n->created_at = now; n->updated_at = now; n->last_activated = now;
g->node_count++;
}
if (!engram_find_node(peer_node)) {
engram_grow_nodes();
EngramNode* n = &g->nodes[g->node_count];
memset(n, 0, sizeof(*n));
n->id = el_strdup(peer_node);
n->content = el_strdup(peer_base);
n->node_type = el_strdup("DharmaPeer");
n->label = el_strdup(peer_node);
n->tier = el_strdup("Working");
n->tags = el_strdup("dharma");
n->metadata = el_strdup("{}");
n->salience = 0.5; n->importance = 0.5; n->confidence = 1.0;
int64_t now = engram_now_ms();
n->created_at = now; n->updated_at = now; n->last_activated = now;
g->node_count++;
}
/* Create the edge with weight 0.0 — caller will increment. */
engram_grow_edges();
EngramEdge* e = &g->edges[g->edge_count];
memset(e, 0, sizeof(*e));
e->id = engram_new_id();
e->from_id = el_strdup(self_id);
e->to_id = el_strdup(peer_node);
e->relation = el_strdup("dharma-relation");
e->metadata = el_strdup("{}");
e->weight = 0.0;
e->confidence = 1.0;
int64_t now = engram_now_ms();
e->created_at = now; e->updated_at = now;
int64_t idx = g->edge_count;
g->edge_count++;
return idx;
}
void dharma_strengthen(el_val_t cgi_id, el_val_t weight) {
const char* id = EL_CSTR(cgi_id);
if (!id || !*id) return;
char* base = NULL; char* url = NULL;
dharma_parse_id(id, &base, &url);
free(url);
int64_t ei = dharma_find_or_create_relation_edge(base, 1);
free(base);
if (ei < 0) return;
EngramStore* g = engram_get();
double inc = engram_decode_score(weight);
if (!(inc >= 0.0)) inc = 0.0;
double w = g->edges[ei].weight + inc;
if (w < 0.0) w = 0.0;
if (w > 1.0) w = 1.0;
g->edges[ei].weight = w;
g->edges[ei].updated_at = engram_now_ms();
g->edges[ei].last_fired = g->edges[ei].updated_at;
}
el_val_t dharma_relationship(el_val_t cgi_id) {
const char* id = EL_CSTR(cgi_id);
if (!id || !*id) return el_from_float(0.0);
char* base = NULL; char* url = NULL;
dharma_parse_id(id, &base, &url);
free(url);
int64_t ei = dharma_find_or_create_relation_edge(base, 0);
free(base);
if (ei < 0) return el_from_float(0.0);
EngramStore* g = engram_get();
return el_from_float(g->edges[ei].weight);
}
el_val_t dharma_peers(void) {
/* Walk dharma-relation edges out of "dharma:self", weight > 0, sort desc. */
EngramStore* g = engram_get();
const char* self_id = "dharma:self";
typedef struct { char* peer_base; double weight; } PeerEntry;
PeerEntry* peers = malloc((size_t)(g->edge_count + 1) * sizeof(PeerEntry));
int64_t pcount = 0;
if (!peers) return el_list_empty();
for (int64_t i = 0; i < g->edge_count; i++) {
EngramEdge* e = &g->edges[i];
if (!e->from_id || !e->to_id) continue;
if (strcmp(e->from_id, self_id) != 0) continue;
if (!e->relation || strcmp(e->relation, "dharma-relation") != 0) continue;
if (e->weight <= 0.0) continue;
const char* prefix = "dharma:peer:";
size_t pl = strlen(prefix);
if (strncmp(e->to_id, prefix, pl) != 0) continue;
peers[pcount].peer_base = el_strdup(e->to_id + pl);
peers[pcount].weight = e->weight;
pcount++;
}
/* Sort desc by weight. */
for (int64_t i = 1; i < pcount; i++) {
PeerEntry key = peers[i];
int64_t j = i - 1;
while (j >= 0 && peers[j].weight < key.weight) {
peers[j + 1] = peers[j]; j--;
}
peers[j + 1] = key;
}
el_val_t out = el_list_empty();
for (int64_t i = 0; i < pcount; i++) {
out = el_list_append(out, EL_STR(peers[i].peer_base));
}
free(peers);
return out;
}
/* ── Batch 4: LLM (Anthropic API client) ─────────────────────────────────── */
/*
* All LLM builtins call https://api.anthropic.com/v1/messages with the API
* key from env ANTHROPIC_API_KEY. Default model is "claude-sonnet-4-5"
* when the supplied model is empty/null.
*
* `llm_call_agentic` runs a real multi-turn tool_use/tool_result loop.
* Tool handlers are registered with `llm_register_tool(name, fn_name)`,
* which dlsym()s the named symbol. Each tool handler has the C signature
* el_val_t handler(el_val_t input_json);
* and returns a JSON-string el_val_t result. Iteration is capped at 10.
*/
static const char* LLM_DEFAULT_MODEL = "claude-sonnet-4-5";
static const char* LLM_API_URL = "https://api.anthropic.com/v1/messages";
static const char* LLM_VERSION = "2023-06-01";
static const char* llm_resolve_model(const char* m) {
if (!m || !*m) return LLM_DEFAULT_MODEL;
return m;
}
/* Make an Anthropic /v1/messages request with the given JSON body. Returns
* the assistant's first text content as an owned string, or a JSON error
* fragment on transport failure. */
static el_val_t llm_request(const char* json_body) {
const char* api_key = getenv("ANTHROPIC_API_KEY");
if (!api_key || !*api_key) {
return http_error_json("ANTHROPIC_API_KEY not set");
}
struct curl_slist* h = NULL;
h = curl_slist_append(h, "Content-Type: application/json");
{
size_t n = strlen(api_key) + 16;
char* line = malloc(n);
snprintf(line, n, "x-api-key: %s", api_key);
h = curl_slist_append(h, line);
free(line);
}
{
size_t n = strlen(LLM_VERSION) + 32;
char* line = malloc(n);
snprintf(line, n, "anthropic-version: %s", LLM_VERSION);
h = curl_slist_append(h, line);
free(line);
}
el_val_t resp = http_do("POST", LLM_API_URL, json_body, h);
curl_slist_free_all(h);
return resp;
}
/* Extract concatenated assistant text from an Anthropic /v1/messages
* response. The response shape is:
* {"content":[{"type":"text","text":"..."}, ...], ...}
* If parsing fails, returns the raw response so the caller can inspect.
*/
static el_val_t llm_extract_text(el_val_t resp_val) {
const char* resp = EL_CSTR(resp_val);
if (!resp || !*resp) return el_wrap_str(el_strdup(""));
/* If error JSON, propagate as-is. */
if (resp[0] == '{' && strstr(resp, "\"error\"")) {
return el_wrap_str(el_strdup(resp));
}
/* Find "content":[ ... ] */
const char* p = json_find_key(resp, "content");
if (!p) return el_wrap_str(el_strdup(resp));
while (*p == ' ' || *p == '\t' || *p == '\n' || *p == '\r') p++;
if (*p != '[') return el_wrap_str(el_strdup(resp));
p++;
JsonBuf out; jb_init(&out);
while (*p && *p != ']') {
while (*p == ' ' || *p == '\t' || *p == '\n' || *p == '\r' || *p == ',') p++;
if (*p != '{') break;
const char* end = json_skip_value(p);
size_t n = (size_t)(end - p);
char* obj = malloc(n + 1);
memcpy(obj, p, n); obj[n] = '\0';
const char* type_p = json_find_key(obj, "type");
if (type_p && *type_p == '"') {
JsonParser jp = { .p = type_p, .end = type_p + strlen(type_p), .err = 0 };
char* type_s = jp_parse_string_raw(&jp);
if (!jp.err && type_s && strcmp(type_s, "text") == 0) {
const char* tp = json_find_key(obj, "text");
if (tp && *tp == '"') {
JsonParser jp2 = { .p = tp, .end = tp + strlen(tp), .err = 0 };
char* text_s = jp_parse_string_raw(&jp2);
if (!jp2.err && text_s) jb_puts(&out, text_s);
free(text_s);
}
}
free(type_s);
}
free(obj);
p = end;
}
return el_wrap_str(out.buf);
}
el_val_t llm_call(el_val_t model, el_val_t prompt) {
const char* m = llm_resolve_model(EL_CSTR(model));
const char* u = EL_CSTR(prompt);
if (!u) u = "";
char* esc_user = json_escape_alloc(u);
JsonBuf b; jb_init(&b);
jb_putc(&b, '{');
jb_puts(&b, "\"model\":"); jb_emit_escaped(&b, m);
jb_puts(&b, ",\"max_tokens\":4096");
jb_puts(&b, ",\"messages\":[{\"role\":\"user\",\"content\":\"");
jb_puts(&b, esc_user);
jb_puts(&b, "\"}]}");
free(esc_user);
el_val_t resp = llm_request(b.buf);
free(b.buf);
return llm_extract_text(resp);
}
el_val_t llm_call_system(el_val_t model, el_val_t system_prompt, el_val_t user_prompt) {
const char* m = llm_resolve_model(EL_CSTR(model));
const char* s = EL_CSTR(system_prompt); if (!s) s = "";
const char* u = EL_CSTR(user_prompt); if (!u) u = "";
char* esc_sys = json_escape_alloc(s);
char* esc_user = json_escape_alloc(u);
JsonBuf b; jb_init(&b);
jb_putc(&b, '{');
jb_puts(&b, "\"model\":"); jb_emit_escaped(&b, m);
jb_puts(&b, ",\"max_tokens\":4096");
if (*s) {
jb_puts(&b, ",\"system\":\"");
jb_puts(&b, esc_sys);
jb_puts(&b, "\"");
}
jb_puts(&b, ",\"messages\":[{\"role\":\"user\",\"content\":\"");
jb_puts(&b, esc_user);
jb_puts(&b, "\"}]}");
free(esc_sys); free(esc_user);
el_val_t resp = llm_request(b.buf);
free(b.buf);
return llm_extract_text(resp);
}
/* ── Tool registry for llm_call_agentic ─────────────────────────────────── */
typedef el_val_t (*llm_tool_fn)(el_val_t input);
typedef struct LlmToolEntry {
char* name;
llm_tool_fn fn;
} LlmToolEntry;
static LlmToolEntry _llm_tools[64];
static size_t _llm_tool_count = 0;
static pthread_mutex_t _llm_tool_mu = PTHREAD_MUTEX_INITIALIZER;
static llm_tool_fn llm_tool_lookup(const char* name) {
if (!name) return NULL;
llm_tool_fn fn = NULL;
pthread_mutex_lock(&_llm_tool_mu);
for (size_t i = 0; i < _llm_tool_count; i++) {
if (strcmp(_llm_tools[i].name, name) == 0) { fn = _llm_tools[i].fn; break; }
}
pthread_mutex_unlock(&_llm_tool_mu);
return fn;
}
void llm_register_tool(el_val_t name, el_val_t handler_fn_name) {
const char* nm = EL_CSTR(name);
const char* sym = EL_CSTR(handler_fn_name);
if (!nm || !*nm || !sym || !*sym) return;
void* p = dlsym(RTLD_DEFAULT, sym);
if (!p) {
fprintf(stderr, "[llm_register_tool] symbol not found: %s\n", sym);
return;
}
pthread_mutex_lock(&_llm_tool_mu);
/* Replace existing entry by name. */
for (size_t i = 0; i < _llm_tool_count; i++) {
if (strcmp(_llm_tools[i].name, nm) == 0) {
_llm_tools[i].fn = (llm_tool_fn)p;
pthread_mutex_unlock(&_llm_tool_mu);
return;
}
}
if (_llm_tool_count < sizeof(_llm_tools) / sizeof(_llm_tools[0])) {
_llm_tools[_llm_tool_count].name = el_strdup(nm);
_llm_tools[_llm_tool_count].fn = (llm_tool_fn)p;
_llm_tool_count++;
}
pthread_mutex_unlock(&_llm_tool_mu);
}
/* Serialize the El `tools` list into the JSON `tools:[...]` field expected
* by the Anthropic API. Each tool is an ElMap with name/description/
* input_schema. input_schema is treated as either a JSON-object string
* (passed through verbatim) or a missing field (substitute {}). */
static void llm_emit_tools_json(JsonBuf* b, el_val_t tools_list) {
jb_putc(b, '[');
ElList* lst = (ElList*)(uintptr_t)tools_list;
int64_t n = lst ? lst->length : 0;
for (int64_t i = 0; i < n; i++) {
if (i > 0) jb_putc(b, ',');
ElMap* tm = as_map(lst->elems[i]);
const char* name = "";
const char* desc = "";
const char* schema = "{}";
if (tm) {
for (int64_t k = 0; k < tm->count; k++) {
const char* key = EL_CSTR(tm->keys[k]);
const char* val = EL_CSTR(tm->values[k]);
if (!key || !val) continue;
if (strcmp(key, "name") == 0) name = val;
else if (strcmp(key, "description") == 0) desc = val;
else if (strcmp(key, "input_schema") == 0) schema = val;
}
}
char* esc_name = json_escape_alloc(name);
char* esc_desc = json_escape_alloc(desc);
jb_puts(b, "{\"name\":\""); jb_puts(b, esc_name);
jb_puts(b, "\",\"description\":\""); jb_puts(b, esc_desc);
jb_puts(b, "\",\"input_schema\":"); jb_puts(b, schema && *schema ? schema : "{}");
jb_putc(b, '}');
free(esc_name); free(esc_desc);
}
jb_putc(b, ']');
}
/* Walk the assistant `content` array and emit each block back into b,
* preserving the verbatim JSON of every block — used to re-include the
* assistant turn in the next request. */
static void llm_emit_content_blocks(JsonBuf* b, const char* resp) {
const char* p = json_find_key(resp, "content");
jb_putc(b, '[');
if (!p) { jb_putc(b, ']'); return; }
while (*p == ' ' || *p == '\t' || *p == '\n' || *p == '\r') p++;
if (*p != '[') { jb_putc(b, ']'); return; }
p++;
int first = 1;
while (*p && *p != ']') {
while (*p == ' ' || *p == '\t' || *p == '\n' || *p == '\r' || *p == ',') p++;
if (*p != '{') break;
const char* end = json_skip_value(p);
if (!first) jb_putc(b, ',');
first = 0;
size_t n = (size_t)(end - p);
jb_reserve(b, n);
memcpy(b->buf + b->len, p, n);
b->len += n;
b->buf[b->len] = '\0';
p = end;
}
jb_putc(b, ']');
}
/* Concatenate all "text" blocks from a response. Returns owned string. */
static char* llm_concat_text_blocks(const char* resp) {
JsonBuf out; jb_init(&out);
if (!resp) return out.buf;
const char* p = json_find_key(resp, "content");
if (!p) return out.buf;
while (*p == ' ' || *p == '\t' || *p == '\n' || *p == '\r') p++;
if (*p != '[') return out.buf;
p++;
while (*p && *p != ']') {
while (*p == ' ' || *p == '\t' || *p == '\n' || *p == '\r' || *p == ',') p++;
if (*p != '{') break;
const char* end = json_skip_value(p);
size_t n = (size_t)(end - p);
char* obj = malloc(n + 1);
memcpy(obj, p, n); obj[n] = '\0';
const char* tp = json_find_key(obj, "type");
if (tp && *tp == '"') {
JsonParser jp = { .p = tp, .end = tp + strlen(tp), .err = 0 };
char* tname = jp_parse_string_raw(&jp);
if (!jp.err && tname && strcmp(tname, "text") == 0) {
const char* xp = json_find_key(obj, "text");
if (xp && *xp == '"') {
JsonParser jp2 = { .p = xp, .end = xp + strlen(xp), .err = 0 };
char* txt = jp_parse_string_raw(&jp2);
if (!jp2.err && txt) jb_puts(&out, txt);
free(txt);
}
}
free(tname);
}
free(obj);
p = end;
}
return out.buf;
}
/* Build tool_result message blocks for every tool_use in a response.
* Appends to `b` an array element for each tool_use; caller wraps. */
static int llm_build_tool_results(JsonBuf* b, const char* resp) {
int any = 0;
const char* p = json_find_key(resp, "content");
if (!p) return 0;
while (*p == ' ' || *p == '\t' || *p == '\n' || *p == '\r') p++;
if (*p != '[') return 0;
p++;
while (*p && *p != ']') {
while (*p == ' ' || *p == '\t' || *p == '\n' || *p == '\r' || *p == ',') p++;
if (*p != '{') break;
const char* end = json_skip_value(p);
size_t n = (size_t)(end - p);
char* obj = malloc(n + 1);
memcpy(obj, p, n); obj[n] = '\0';
const char* tp = json_find_key(obj, "type");
char* type_s = NULL;
if (tp && *tp == '"') {
JsonParser jp = { .p = tp, .end = tp + strlen(tp), .err = 0 };
type_s = jp_parse_string_raw(&jp);
}
if (type_s && strcmp(type_s, "tool_use") == 0) {
/* Extract id, name, input. */
char* id_s = NULL; char* name_s = NULL;
const char* idp = json_find_key(obj, "id");
if (idp && *idp == '"') {
JsonParser jp = { .p = idp, .end = idp + strlen(idp), .err = 0 };
id_s = jp_parse_string_raw(&jp);
}
const char* np = json_find_key(obj, "name");
if (np && *np == '"') {
JsonParser jp = { .p = np, .end = np + strlen(np), .err = 0 };
name_s = jp_parse_string_raw(&jp);
}
el_val_t input_raw = json_get_raw(EL_STR(obj), EL_STR("input"));
const char* input_s = EL_CSTR(input_raw);
if (!input_s || !*input_s) input_s = "{}";
llm_tool_fn fn = llm_tool_lookup(name_s ? name_s : "");
char* result = NULL;
int is_error = 0;
if (!fn) {
size_t en = strlen(name_s ? name_s : "(null)") + 64;
result = malloc(en);
snprintf(result, en, "{\"error\":\"tool not registered: %s\"}",
name_s ? name_s : "(null)");
is_error = 1;
} else {
el_val_t out = fn(EL_STR(input_s));
const char* os = EL_CSTR(out);
result = el_strdup(os ? os : "");
}
if (any) jb_putc(b, ',');
char* esc_id = json_escape_alloc(id_s ? id_s : "");
char* esc_res = json_escape_alloc(result ? result : "");
jb_puts(b, "{\"type\":\"tool_result\",\"tool_use_id\":\"");
jb_puts(b, esc_id);
jb_puts(b, "\",\"content\":\"");
jb_puts(b, esc_res);
jb_puts(b, "\"");
if (is_error) jb_puts(b, ",\"is_error\":true");
jb_putc(b, '}');
free(esc_id); free(esc_res); free(result);
free(id_s); free(name_s);
any = 1;
}
free(type_s);
free(obj);
p = end;
}
return any;
}
el_val_t llm_call_agentic(el_val_t model, el_val_t system, el_val_t user, el_val_t tools) {
/* Empty tools list → degrade to plain system call. */
ElList* tl = (ElList*)(uintptr_t)tools;
if (!tl || tl->length == 0) {
return llm_call_system(model, system, user);
}
const char* m = llm_resolve_model(EL_CSTR(model));
const char* sys_p = EL_CSTR(system); if (!sys_p) sys_p = "";
const char* usr_p = EL_CSTR(user); if (!usr_p) usr_p = "";
/* Build the static parts: tools JSON and system prompt — these don't
* change across iterations. */
JsonBuf tools_buf; jb_init(&tools_buf);
llm_emit_tools_json(&tools_buf, tools);
char* esc_sys = json_escape_alloc(sys_p);
/* messages array, accumulated as a mutable JSON fragment (no surrounding
* brackets — emitted at request time). */
JsonBuf msgs; jb_init(&msgs);
/* First user message. */
char* esc_user = json_escape_alloc(usr_p);
jb_puts(&msgs, "{\"role\":\"user\",\"content\":\"");
jb_puts(&msgs, esc_user);
jb_puts(&msgs, "\"}");
free(esc_user);
char* last_text = el_strdup("");
el_val_t final_out = 0;
int reached_cap = 1;
for (int iter = 0; iter < 10; iter++) {
/* Build request body. */
JsonBuf body; jb_init(&body);
jb_putc(&body, '{');
jb_puts(&body, "\"model\":"); jb_emit_escaped(&body, m);
jb_puts(&body, ",\"max_tokens\":4096");
if (*sys_p) {
jb_puts(&body, ",\"system\":\"");
jb_puts(&body, esc_sys);
jb_puts(&body, "\"");
}
jb_puts(&body, ",\"tools\":");
jb_puts(&body, tools_buf.buf);
jb_puts(&body, ",\"messages\":[");
jb_puts(&body, msgs.buf);
jb_puts(&body, "]}");
el_val_t resp_v = llm_request(body.buf);
free(body.buf);
const char* resp = EL_CSTR(resp_v);
if (!resp || !*resp) {
final_out = http_error_json("empty response");
reached_cap = 0;
break;
}
if (resp[0] == '{' && strstr(resp, "\"error\"") &&
!json_find_key(resp, "content")) {
final_out = el_wrap_str(el_strdup(resp));
reached_cap = 0;
break;
}
/* Update last_text from this response. */
free(last_text);
last_text = llm_concat_text_blocks(resp);
/* Inspect stop_reason. */
el_val_t sr_v = json_get_string(EL_STR(resp), EL_STR("stop_reason"));
const char* sr = EL_CSTR(sr_v); if (!sr) sr = "";
if (strcmp(sr, "end_turn") == 0) {
final_out = el_wrap_str(el_strdup(last_text));
reached_cap = 0;
break;
}
if (strcmp(sr, "max_tokens") == 0) {
size_t ln = strlen(last_text) + 16;
char* out = malloc(ln);
snprintf(out, ln, "%s\n[truncated]", last_text);
final_out = el_wrap_str(out);
reached_cap = 0;
break;
}
if (strcmp(sr, "tool_use") != 0) {
/* Unexpected stop reason; return the text we have. */
final_out = el_wrap_str(el_strdup(last_text));
reached_cap = 0;
break;
}
/* Append the assistant turn (raw content blocks) to messages. */
JsonBuf ab; jb_init(&ab);
jb_puts(&ab, ",{\"role\":\"assistant\",\"content\":");
llm_emit_content_blocks(&ab, resp);
jb_putc(&ab, '}');
jb_puts(&msgs, ab.buf);
free(ab.buf);
/* Build tool_result message. */
JsonBuf tr; jb_init(&tr);
jb_puts(&tr, ",{\"role\":\"user\",\"content\":[");
int any = llm_build_tool_results(&tr, resp);
jb_puts(&tr, "]}");
if (any) {
jb_puts(&msgs, tr.buf);
}
free(tr.buf);
}
if (reached_cap) {
size_t ln = strlen(last_text) + 32;
char* out = malloc(ln);
snprintf(out, ln, "[loop_cap_reached]\n%s", last_text);
final_out = el_wrap_str(out);
}
free(last_text);
free(esc_sys);
free(tools_buf.buf);
free(msgs.buf);
return final_out;
}
/* base64-encode arbitrary bytes (returns owned C string). */
static char* base64_encode(const unsigned char* src, size_t n) {
static const char tbl[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
size_t out_len = 4 * ((n + 2) / 3);
char* out = malloc(out_len + 1);
if (!out) return NULL;
size_t o = 0;
for (size_t i = 0; i < n;) {
uint32_t v = 0; int got = 0;
v |= (uint32_t)src[i++] << 16; got++;
if (i < n) { v |= (uint32_t)src[i++] << 8; got++; }
if (i < n) { v |= (uint32_t)src[i++]; got++; }
out[o++] = tbl[(v >> 18) & 0x3f];
out[o++] = tbl[(v >> 12) & 0x3f];
out[o++] = (got > 1) ? tbl[(v >> 6) & 0x3f] : '=';
out[o++] = (got > 2) ? tbl[v & 0x3f] : '=';
}
out[o] = '\0';
return out;
}
el_val_t llm_vision(el_val_t model, el_val_t system, el_val_t prompt, el_val_t image_url_or_b64) {
const char* m = llm_resolve_model(EL_CSTR(model));
const char* s = EL_CSTR(system); if (!s) s = "";
const char* u = EL_CSTR(prompt); if (!u) u = "";
const char* img = EL_CSTR(image_url_or_b64); if (!img) img = "";
/* Choose source mode */
char* image_block = NULL;
if (strncasecmp(img, "http://", 7) == 0 || strncasecmp(img, "https://", 8) == 0) {
char* esc_url = json_escape_alloc(img);
size_t n = strlen(esc_url) + 128;
image_block = malloc(n);
snprintf(image_block, n,
"{\"type\":\"image\",\"source\":{\"type\":\"url\",\"url\":\"%s\"}}",
esc_url);
free(esc_url);
} else if (strncmp(img, "data:", 5) == 0) {
/* Inline data URL: split media-type and base64 */
const char* semi = strchr(img + 5, ';');
const char* comma = strchr(img + 5, ',');
char media[64] = "image/png";
if (semi && comma && semi < comma) {
size_t ml = (size_t)(semi - (img + 5));
if (ml >= sizeof(media)) ml = sizeof(media) - 1;
memcpy(media, img + 5, ml); media[ml] = '\0';
}
const char* b64 = comma ? comma + 1 : "";
char* esc_media = json_escape_alloc(media);
char* esc_b64 = json_escape_alloc(b64);
size_t n = strlen(esc_media) + strlen(esc_b64) + 192;
image_block = malloc(n);
snprintf(image_block, n,
"{\"type\":\"image\",\"source\":{\"type\":\"base64\","
"\"media_type\":\"%s\",\"data\":\"%s\"}}",
esc_media, esc_b64);
free(esc_media); free(esc_b64);
} else if (*img) {
/* Treat as file path: read, base64-encode, attach. */
FILE* f = fopen(img, "rb");
if (!f) {
char err[256]; snprintf(err, sizeof(err), "cannot open image: %s", img);
return http_error_json(err);
}
fseek(f, 0, SEEK_END);
long sz = ftell(f);
rewind(f);
if (sz <= 0) { fclose(f); return http_error_json("empty image file"); }
unsigned char* buf = malloc((size_t)sz);
if (!buf) { fclose(f); return http_error_json("oom"); }
size_t got = fread(buf, 1, (size_t)sz, f);
fclose(f);
char* b64 = base64_encode(buf, got);
free(buf);
if (!b64) return http_error_json("base64 encode failed");
const char* media = "image/png";
size_t ilen = strlen(img);
if (ilen >= 4) {
if (strcasecmp(img + ilen - 4, ".jpg") == 0 ||
(ilen >= 5 && strcasecmp(img + ilen - 5, ".jpeg") == 0)) media = "image/jpeg";
else if (strcasecmp(img + ilen - 4, ".gif") == 0) media = "image/gif";
else if (strcasecmp(img + ilen - 4, ".webp") == 0) media = "image/webp";
}
char* esc_b64 = json_escape_alloc(b64); free(b64);
size_t n = strlen(esc_b64) + 192;
image_block = malloc(n);
snprintf(image_block, n,
"{\"type\":\"image\",\"source\":{\"type\":\"base64\","
"\"media_type\":\"%s\",\"data\":\"%s\"}}",
media, esc_b64);
free(esc_b64);
}
char* esc_sys = json_escape_alloc(s);
char* esc_user = json_escape_alloc(u);
JsonBuf b; jb_init(&b);
jb_putc(&b, '{');
jb_puts(&b, "\"model\":"); jb_emit_escaped(&b, m);
jb_puts(&b, ",\"max_tokens\":4096");
if (*s) {
jb_puts(&b, ",\"system\":\"");
jb_puts(&b, esc_sys);
jb_puts(&b, "\"");
}
jb_puts(&b, ",\"messages\":[{\"role\":\"user\",\"content\":[");
if (image_block) {
jb_puts(&b, image_block);
jb_putc(&b, ',');
}
jb_puts(&b, "{\"type\":\"text\",\"text\":\"");
jb_puts(&b, esc_user);
jb_puts(&b, "\"}]}]}");
free(esc_sys); free(esc_user); free(image_block);
el_val_t resp = llm_request(b.buf);
free(b.buf);
return llm_extract_text(resp);
}
el_val_t llm_models(void) {
el_val_t lst = el_list_empty();
lst = el_list_append(lst, el_wrap_str(el_strdup("claude-sonnet-4-5")));
lst = el_list_append(lst, el_wrap_str(el_strdup("claude-opus-4-7")));
lst = el_list_append(lst, el_wrap_str(el_strdup("claude-haiku-4-5")));
return lst;
}
/* ── Native VM builtin aliases ──────────────────────────────────────────────
* El source files use native_* names (El VM builtins).
* When compiled to C, these map directly to el_* runtime functions. */
el_val_t native_list_get(el_val_t list, el_val_t index) {
return el_list_get(list, index);
}
el_val_t native_list_len(el_val_t list) {
return el_list_len(list);
}
el_val_t native_list_append(el_val_t list, el_val_t elem) {
return el_list_append(list, elem);
}
el_val_t native_list_empty(void) {
return el_list_empty();
}
el_val_t native_string_chars(el_val_t sv) {
const char* s = EL_CSTR(sv);
el_val_t result = el_list_empty();
if (!s) return result;
while (*s) {
char buf[2];
buf[0] = *s;
buf[1] = '\0';
result = el_list_append(result, EL_STR(strdup(buf)));
s++;
}
return result;
}
el_val_t native_int_to_str(el_val_t n) {
return int_to_str(n);
}
/* ── Method-call shorthand aliases ──────────────────────────────────────────
* Short names that result from the method-call convention:
* myList.append(x) → append(myList, x)
* myList.len() → len(myList)
* myList.get(i) → get(myList, i)
* myMap.map_get(k) → map_get(myMap, k)
* myMap.map_set(k,v) → map_set(myMap, k, v) */
el_val_t append(el_val_t list, el_val_t elem) { return el_list_append(list, elem); }
el_val_t len(el_val_t list) { return el_list_len(list); }
el_val_t get(el_val_t list, el_val_t index) { return el_list_get(list, index); }
el_val_t map_get(el_val_t map, el_val_t key) { return el_map_get(map, key); }
el_val_t map_set(el_val_t map, el_val_t key, el_val_t value) { return el_map_set(map, key, value); }