/*
enzstd -- .warc.zst compressor
-Copyright (C) 2021 Sergey Matveev <stargrave@stargrave.org>
+Copyright (C) 2021-2023 Sergey Matveev <stargrave@stargrave.org>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
-#include <sys/endian.h>
#include <zstd.h>
if (ctx == NULL) {
fputs("can not initialize ZSTD_createCCtx\n", stderr);
return EXIT_FAILURE;
- };
+ }
size_t zCode = ZSTD_CCtx_setParameter(ctx, ZSTD_c_checksumFlag, 1);
if (ZSTD_isError(zCode)) {
fprintf(stderr, "can not setParameter: %s\n", ZSTD_getErrorName(zCode));
return EXIT_FAILURE;
- };
+ }
zCode = ZSTD_CCtx_setParameter(ctx, ZSTD_c_compressionLevel, ZSTD_maxCLevel());
if (ZSTD_isError(zCode)) {
fprintf(stderr, "can not setParameter: %s\n", ZSTD_getErrorName(zCode));
return EXIT_FAILURE;
- };
+ }
+ char *src = NULL;
+ char *dst = NULL;
int rc = EXIT_FAILURE;
size_t srcSize = 8;
- char *src = malloc(srcSize);
+ src = malloc(srcSize);
if (src == NULL) {
fprintf(stderr, "can not allocate memory: %zu\n", srcSize);
goto Exit;
- };
+ }
size_t dstSize = 0;
- char *dst = NULL;
size_t srcWantSize = 0;
size_t dstWantSize = 0;
size_t n = 0;
if (n < 8) {
if (feof(stdin)) {
break;
- };
+ }
perror("can not fread(stdin)");
goto Exit;
- };
- srcWantSize = (size_t)be64dec(src);
+ }
+ srcWantSize = ((uint64_t)(src[0]) << 56) | ((uint64_t)(src[1]) << 48) |
+ ((uint64_t)(src[2]) << 40) | ((uint64_t)(src[3]) << 32) |
+ ((uint64_t)(src[4]) << 24) | ((uint64_t)(src[5]) << 16) |
+ ((uint64_t)(src[6]) << 8) | (uint64_t)(src[7]);
if (srcWantSize > srcSize) {
free(src);
srcSize = srcWantSize;
if (src == NULL) {
fprintf(stderr, "can not allocate memory: %zu\n", srcSize);
goto Exit;
- };
- };
+ }
+ }
n = fread(src, 1, srcWantSize, stdin);
if (n < srcWantSize) {
fputs("insufficient data fed\n", stderr);
goto Exit;
- };
+ }
dstWantSize = ZSTD_compressBound(srcWantSize);
if (dstWantSize > dstSize) {
free(dst);
if (dst == NULL) {
fprintf(stderr, "can not allocate memory: %zu\n", dstSize);
goto Exit;
- };
- };
+ }
+ }
zCode = ZSTD_compress2(ctx, dst, dstSize, src, srcWantSize);
if (ZSTD_isError(zCode)) {
fprintf(stderr, "can not compress: %s\n", ZSTD_getErrorName(zCode));
goto Exit;
- };
+ }
n = fwrite(dst, 1, zCode, stdout);
if (n < zCode) {
perror("can not fwrite(stdout)");
goto Exit;
- };
- };
+ }
+ }
rc = EXIT_SUCCESS;
Exit:
free(src);
ZSTD_freeCCtx(ctx);
return rc;
-};
+}