Function cbm_error_ranges_str

internal/cbm/cbm.c:1099–1114

Serialize collected regions as "start-end,start-end,..." into the arena. */

/* Serialize collected regions as "start-end,start-end,..." into the arena. */
static const char *cbm_error_ranges_str(CBMArena *a, const cbm_error_regions_t *regs) {
    if (regs->count <= 0) {
        return NULL;
    }
    enum { RANGE_MAX = 24 }; /* "4294967295-4294967295," */
    char *buf = (char *)cbm_arena_alloc(a, (size_t)regs->count * RANGE_MAX);
    if (!buf) {
        return NULL;
    }
    size_t off = 0;
    for (int i = 0; i < regs->count; i++) {
        off += (size_t)snprintf(buf + off, RANGE_MAX, "%s%u-%u", i ? "," : "", regs->starts[i],
                                regs->ends[i]);
    }
    return buf;
}

/* Public entry: run the extraction and journal completion. The DONE mark on
 * every ordinary return (including error/timeout results) tells the crash