overlay_callback_full(AMX *amx, int index)
{
// Check the full overlay pool
amx->codesize = overlay_tbl[index].size;
amx->code = amx_poolfind(index);
// Finally, load from disc
if (amx->code == NULL)
{
if ((amx->code = amx_poolalloc(amx->codesize, index)) == NULL)
return AMX_ERR_FILE_CHANGED; /* failure allocating memory for the overlay */
// Unfortunately we have to clear the cache as poolalloc may
// have released some blocks.
memset(cache, 0, sizeof(cache));
// Verify that the file has not changed
{
FILINFO newfile;
f_stat(amx_filename, &newfile);
if (newfile.fsize != amx_file->fsize)
return AMX_ERR_FILE_CHANGED;
}
// Read the block
{
AMX_HEADER *hdr = (AMX_HEADER*)amx->base;
unsigned count;
f_lseek(amx_file, hdr->cod + overlay_tbl[index].offset);
f_read(amx_file, amx->code, amx->codesize, &count);
if (count != amx->codesize)
return AMX_ERR_FORMAT;
}
// Verify the loaded code and rewrite it.
int ret = VerifyPcode(amx);
if (ret != AMX_ERR_NONE)
return ret;
}
return AMX_ERR_NONE;
}
/* prun_Overlay()
* Helper function to load overlays
*/
int AMXAPI prun_Overlay(AMX *amx, int index)
{
AMX_HEADER *hdr;
AMX_OVERLAYINFO *tbl;
FILE *ovl;
assert(amx != NULL);
hdr = (AMX_HEADER*)amx->base;
assert((size_t)index < (hdr->nametable - hdr->overlays) / sizeof(AMX_OVERLAYINFO));
tbl = (AMX_OVERLAYINFO*)(amx->base + hdr->overlays) + index;
amx->codesize = tbl->size;
amx->code = amx_poolfind(index);
if (amx->code == NULL) {
if ((amx->code = amx_poolalloc(tbl->size, index)) == NULL)
return AMX_ERR_OVERLAY; /* failure allocating memory for the overlay */
ovl = fopen(g_filename, "rb");
assert(ovl != NULL);
fseek(ovl, (int)hdr->cod + tbl->offset, SEEK_SET);
fread(amx->code, 1, tbl->size, ovl);
fclose(ovl);
} /* if */
return AMX_ERR_NONE;
}