59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
#include "./file.h"
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#include <assert.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <msgpack.h>
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bool mpkutil_file_unpack_with_unpacker(
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msgpack_unpacked* obj,
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FILE* fp,
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msgpack_unpacker* unpacker) {
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assert(obj != NULL);
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assert(fp != NULL);
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assert(unpacker != NULL);
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for (;;) {
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if (feof(fp)) return false;
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const size_t maxlen = msgpack_unpacker_buffer_capacity(unpacker);
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if (maxlen == 0) {
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fprintf(stderr, "unpacker buffer overflow\n");
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abort();
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}
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const size_t len = fread(
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msgpack_unpacker_buffer(unpacker), 1, maxlen, fp);
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if (ferror(fp)) return false;
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msgpack_unpacker_buffer_consumed(unpacker, len);
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size_t parsed_len;
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switch (msgpack_unpacker_next_with_size(unpacker, obj, &parsed_len)) {
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case MSGPACK_UNPACK_SUCCESS:
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return fseek(fp, (long) parsed_len - len, SEEK_CUR) == 0;
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case MSGPACK_UNPACK_CONTINUE:
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break;
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case MSGPACK_UNPACK_PARSE_ERROR:
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default:
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return false;
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}
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}
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}
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bool mpkutil_file_unpack(msgpack_unpacked* obj, FILE* fp) {
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assert(fp != NULL);
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assert(obj != NULL);
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msgpack_unpacker unpacker;
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if (!msgpack_unpacker_init(&unpacker, 1024)) return false;
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const bool result = mpkutil_file_unpack_with_unpacker(obj, fp, &unpacker);
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msgpack_unpacker_destroy(&unpacker);
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return result;
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}
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