CST-agent/vendor/sashidown/src/compat_cmark.c

#include "sashidown.h"
#include <stdlib.h>
#include <string.h>
#include <stdint.h>

char *cmark_markdown_to_html(const char *text, int len)
{
    if (!text)
        return NULL;
    if (len < 0)
        len = (int)strlen(text);

    size_t in_len = (size_t)len;
    /* HTML typically expands; grow until parse fits (thread-safe, no static buf). */
    size_t cap = in_len * 4 + 256;
    if (cap < 1024)
        cap = 1024;

    for (;;) {
        char *buf = (char *)malloc(cap);
        if (!buf)
            return NULL;

        size_t out_len = 0;
        if (sashidown_parse(text, in_len, buf, cap, &out_len) == 0) {
            char *fit = (char *)realloc(buf, out_len + 1);
            return fit ? fit : buf;
        }

        free(buf);
        if (cap > SIZE_MAX / 2)
            return NULL;
        size_t next = cap * 2;
        /* Bail if expansion is absurd relative to input. */
        if (next > in_len * 64 + 4096)
            return NULL;
        cap = next;
    }
}

void sashidown_free(void *ptr)
{
    free(ptr);
}