Function cbm_extract_like_hints

src/store/store.c:2264–2329

/* ── extractLikeHints ─────────────────────────────────────────── */

int cbm_extract_like_hints(const char *pattern, char **out, int max_out) {
    if (!pattern || !out || max_out <= 0) {
        return 0;
    }

    /* Bail on alternation — can't convert OR regex to AND LIKE */
    for (const char *p = pattern; *p; p++) {
        if (*p == '|') {
            return 0;
        }
    }

    int count = 0;
    char buf[CBM_SZ_256];
    int blen = 0;

    int i = 0;
    while (pattern[i]) {
        char ch = pattern[i];
        switch (ch) {
        case '\\':
            /* Escaped char — the next char is literal */
            if (pattern[i + SKIP_ONE]) {
                if (blen < (int)sizeof(buf) - SKIP_ONE) {
                    buf[blen++] = pattern[i + SKIP_ONE];
                }
                i += ST_GLOB_SKIP;
            } else {
                i++;
            }
            break;
        case '.':
        case '*':
        case '+':
        case '?':
        case '^':
        case '$':
        case '(':
        case ')':
        case '[':
        case ']':
        case '{':
        case '}':
            /* Meta character — flush current literal segment */
            if (blen >= ST_GLOB_MIN_LEN && count < max_out) {
                buf[blen] = '\0';
                out[count++] = strdup(buf);
            }
            blen = 0;
            i++;
            break;
        default:
            if (blen < (int)sizeof(buf) - SKIP_ONE) {
                buf[blen++] = ch;
            }
            i++;
            break;
        }