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library.c
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library.c
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#include "esm/library.h"
#include "gc/roots.h"
#include "ant.h"
#include "internal.h"
#include <stdarg.h>
#include <string.h>
#include <uthash.h>
typedef struct ant_library_entry {
char name[256];
char display_name[256];
ant_library_init_fn init_fn;
ant_value_t cached_ns;
bool ns_initialized;
bool root_registered;
struct ant_library_entry *canonical;
UT_hash_handle hh;
} ant_library_entry_t;
static ant_library_entry_t *library_registry = NULL;
static bool ant_library_display_name_is_better(const char *candidate, const char *current) {
if (!candidate || !candidate[0]) return false;
if (!current || !current[0]) return true;
bool candidate_is_node = strncmp(candidate, "node:", 5) == 0;
bool current_is_node = strncmp(current, "node:", 5) == 0;
return candidate_is_node && !current_is_node;
}
void ant_register_library(ant_library_init_fn init_fn, const char *name, ...) {
va_list args;
const char *alias = name;
ant_library_entry_t *canonical_entry = NULL;
va_start(args, name);
while (alias != NULL) {
ant_library_entry_t *lib = (ant_library_entry_t *)ant_calloc(sizeof(ant_library_entry_t));
if (!lib) break;
strncpy(lib->name, alias, sizeof(lib->name) - 1);
lib->name[sizeof(lib->name) - 1] = '\0';
lib->init_fn = init_fn;
lib->ns_initialized = false;
if (!canonical_entry) canonical_entry = lib;
lib->canonical = canonical_entry;
if (ant_library_display_name_is_better(alias, canonical_entry->display_name)) {
strncpy(canonical_entry->display_name, alias, sizeof(canonical_entry->display_name) - 1);
canonical_entry->display_name[sizeof(canonical_entry->display_name) - 1] = '\0';
}
HASH_ADD_STR(library_registry, name, lib);
alias = va_arg(args, const char *);
}
va_end(args);
}
static ant_library_entry_t *find_library(const char *specifier, size_t spec_len) {
ant_library_entry_t *lib = NULL;
char key[256];
if (spec_len >= sizeof(key)) return NULL;
memcpy(key, specifier, spec_len);
key[spec_len] = '\0';
HASH_FIND_STR(library_registry, key, lib);
return lib;
}
void ant_library_foreach(ant_library_iter_fn cb, void *userdata) {
ant_library_entry_t *lib, *tmp;
HASH_ITER(hh, library_registry, lib, tmp) if (!strchr(lib->name, ':')) cb(lib->name, userdata);
}
ant_value_t js_esm_load_registered_library(ant_t *js, const char *specifier, size_t spec_len, bool *loaded) {
ant_library_entry_t *lib = find_library(specifier, spec_len);
if (!lib) {
if (loaded) *loaded = false;
return js_mkundef();
}
if (loaded) *loaded = true;
ant_library_entry_t *canon = lib->canonical;
if (canon->ns_initialized) return canon->cached_ns;
if (!canon->root_registered) {
gc_register_root(&canon->cached_ns);
canon->root_registered = true;
}
canon->cached_ns = canon->init_fn(js);
if (is_object_type(canon->cached_ns)) {
const char *display_name = canon->display_name[0] ? canon->display_name : canon->name;
ant_value_t module_ctx = js_create_module_context(js, display_name, false);
if (is_err(module_ctx)) return module_ctx;
if (is_object_type(module_ctx)) js_set_slot_wb(js, canon->cached_ns, SLOT_MODULE_CTX, module_ctx);
}
canon->ns_initialized = true;
return canon->cached_ns;
}

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