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utils.c
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utils.c
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#include "utils.h"
#include "messages.h"
#include <stdio.h>
#include <stdbool.h>
#include <sys/stat.h>
#include <crprintf.h>
static const char *const js_extensions[] = {
".js", ".ts",
".cjs", ".mjs",
".jsx", ".tsx", NULL
};
int hex_digit(char c) {
static const int8_t lookup[256] = {
['0']=0, ['1']=1, ['2']=2, ['3']=3, ['4']=4, ['5']=5, ['6']=6, ['7']=7, ['8']=8, ['9']=9,
['a']=10, ['b']=11, ['c']=12, ['d']=13, ['e']=14, ['f']=15,
['A']=10, ['B']=11, ['C']=12, ['D']=13, ['E']=14, ['F']=15,
};
int8_t val = lookup[(unsigned char)c];
return val ? val : (c == '0' ? 0 : -1);
}
char hex_char(int v) {
return "0123456789abcdef"[v & 0x0f];
}
uint64_t hash_key(const char *key, size_t len) {
uint64_t hash = 14695981039346656037ULL;
size_t i = 0;
for (; i + 8 <= len; i += 8) {
uint64_t word;
memcpy(&word, key + i, 8);
hash ^= word;
hash *= 1099511628211ULL;
}
for (; i < len; i++) {
hash ^= (uint8_t)key[i];
hash *= 1099511628211ULL;
}
return hash;
}
int is_typescript_file(const char *filename) {
if (filename == NULL) return 0;
size_t len = strlen(filename);
if (len < 3) return 0;
const char *ext = filename + len;
while (ext > filename && *(ext - 1) != '.' && *(ext - 1) != '/') ext--;
if (ext == filename || *(ext - 1) != '.') return 0;
ext--;
return (strcmp(ext, ".ts") == 0 || strcmp(ext, ".mts") == 0 || strcmp(ext, ".cts") == 0);
}
static bool has_js_extension(const char *filename) {
const char *dot = strrchr(filename, '.');
if (!dot) return false;
for (const char *const *ext = js_extensions; *ext; ext++) {
if (strcmp(dot, *ext) == 0) return true;
}
return false;
}
char *resolve_js_file(const char *filename) {
extern bool esm_is_url(const char *path);
if (!filename) return NULL;
if (esm_is_url(filename)) return strdup(filename);
struct stat st;
if (stat(filename, &st) == 0) {
if (S_ISREG(st.st_mode)) return strdup(filename);
if (!S_ISDIR(st.st_mode)) return NULL;
size_t len = strlen(filename);
int has_slash = (len > 0 && filename[len - 1] == '/');
char *index_path = try_oom(len + 10 + (has_slash ? 0 : 1));
sprintf(index_path, "%s%sindex.js", filename, has_slash ? "" : "/");
return index_path;
}
if (has_js_extension(filename)) return NULL;
size_t base_len = strlen(filename);
for (const char *const *ext = js_extensions; *ext; ext++) {
size_t ext_len = strlen(*ext);
char *test_path = try_oom(base_len + ext_len + 1);
memcpy(test_path, filename, base_len);
memcpy(test_path + base_len, *ext, ext_len + 1);
if (stat(test_path, &st) == 0 && S_ISREG(st.st_mode)) {
return test_path;
} free(test_path);
}
return NULL;
}
void *try_oom(size_t size) {
void *p = malloc(size);
if (!p) {
crfprintf(stderr, msg.oom_fatal);
exit(EXIT_FAILURE);
} return p;
}
void cstr_free(cstr_buf_t *buf) {
if (buf->heap) free(buf->heap);
}
char *cstr_init(cstr_buf_t *buf, char *stack, size_t stack_size, const char *src, size_t len) {
if (len < stack_size) {
buf->ptr = stack;
buf->heap = NULL;
} else {
buf->heap = malloc(len + 1);
if (!buf->heap) return NULL;
buf->ptr = buf->heap;
}
memcpy(buf->ptr, src, len);
buf->ptr[len] = '\0';
return buf->ptr;
}

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