off_t off_size;
char errbuf[128];
*bufptr = NULL;
+ *size = 0;
if (fd < 0) {
err = AVERROR(errno);
}
*size = off_size;
+ if (!*size) {
+ *bufptr = NULL;
+ goto out;
+ }
+
#if HAVE_MMAP
ptr = mmap(NULL, *size, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0);
if (ptr == MAP_FAILED) {
av_strerror(err, errbuf, sizeof(errbuf));
av_log(&file_log_ctx, AV_LOG_ERROR, "Error occurred in mmap(): %s\n", errbuf);
close(fd);
+ *size = 0;
return err;
}
*bufptr = ptr;
if (!mh) {
av_log(&file_log_ctx, AV_LOG_ERROR, "Error occurred in CreateFileMapping()\n");
close(fd);
+ *size = 0;
return -1;
}
if (!ptr) {
av_log(&file_log_ctx, AV_LOG_ERROR, "Error occurred in MapViewOfFile()\n");
close(fd);
+ *size = 0;
return -1;
}
if (!*bufptr) {
av_log(&file_log_ctx, AV_LOG_ERROR, "Memory allocation error occurred\n");
close(fd);
+ *size = 0;
return AVERROR(ENOMEM);
}
read(fd, *bufptr, *size);
#endif
+out:
close(fd);
return 0;
}
void av_file_unmap(uint8_t *bufptr, size_t size)
{
+ if (!size || !bufptr)
+ return;
#if HAVE_MMAP
munmap(bufptr, size);
#elif HAVE_MAPVIEWOFFILE