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#include "jurl.h"
#ifdef POLYFILL_GETCBYTES
const char *poly_getcbytes(const Janet *argv, int32_t n) {
/* Ensure buffer 0-padded */
if (janet_checktype(argv[n], JANET_BUFFER)) {
JanetBuffer *b = janet_unwrap_buffer(argv[n]);
if ((b->gc.flags & JANET_BUFFER_FLAG_NO_REALLOC) && b->count == b->capacity) {
/* Make a copy with janet_smalloc in the rare case we have a buffer that
* cannot be realloced and pushing a 0 byte would panic. */
/* FIXME: This will fail under jurl, since jurl pre-supposes that the
* lifetime of a getcbytes call string is equivalent to the lifetime
* of the given Janet value. Maybe manually garbage collect? */
char *new_string = janet_smalloc(b->count + 1);
memcpy(new_string, b->data, b->count);
new_string[b->count] = 0;
if (strlen(new_string) != (size_t) b->count) goto badzeros;
return new_string;
} else {
/* Ensure trailing 0 */
janet_buffer_push_u8(b, 0);
b->count--;
if (strlen((char *)b->data) != (size_t) b->count) goto badzeros;
return (const char *) b->data;
}
}
JanetByteView view = janet_getbytes(argv, n);
const char *cstr = (const char *)view.bytes;
if (strlen(cstr) != (size_t) view.len) goto badzeros;
return cstr;
badzeros:
janet_panic("bytes contain embedded 0s");
}
#endif
#ifdef POLYFILL_OPTCBYTES
const char *poly_optcbytes(const Janet *argv, int32_t argc, int32_t n, const char *dflt) {
if (n >= argc || janet_checktype(argv[n], JANET_NIL)) {
return dflt;
}
return janet_getcbytes(argv, n);
}
#endif
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