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#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include "compatibility.h"
#include "memfile.h"
MEMFILE*
memfopen() {
return (MEMFILE*) calloc(1, sizeof(MEMFILE));
}
void
memfclose(MEMFILE* mf) {
free(memfdata(mf));
free(mf);
}
char*
memfresize(MEMFILE* mf, const size_t newsize) {
if (!mf) return NULL;
// Grow
if (mf->size < newsize) {
char* const tmp = (char*) realloc(mf->data, newsize);
if (!tmp) return NULL;
mf->data = tmp;
}
char* const insert_point = mf->data + mf->size;
mf->size = newsize;
return insert_point;
}
size_t
memfwrite(const char* ptr, size_t size, size_t nmemb, void* stream) {
MEMFILE* const mf = (MEMFILE*) stream;
const size_t block = size * nmemb;
if (!mf) return block; // through
const size_t orig_size = memfsize(mf);
if (!memfresize(mf, orig_size + block)) return block;
memcpy(memfdata(mf) + orig_size, ptr, block);
return block;
}
char*
memfstrdup(const MEMFILE* mf) {
if (!memfsize(mf)) return NULL;
return strndup(memfcdata(mf), memfsize(mf));
}
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