648db22b |
1 | /* |
2 | * Copyright (c) Martin Liska, SUSE, Meta Platforms, Inc. and affiliates. |
3 | * All rights reserved. |
4 | * |
5 | * This source code is licensed under both the BSD-style license (found in the |
6 | * LICENSE file in the root directory of this source tree) and the GPLv2 (found |
7 | * in the COPYING file in the root directory of this source tree). |
8 | * You may select, at your option, one of the above-listed licenses. |
9 | */ |
10 | |
11 | |
12 | #include <stdio.h> // printf |
13 | #include <stdlib.h> // free |
14 | #include <string.h> // memset, strcat, strlen |
15 | #include <zstd.h> // presumes zstd library is installed |
16 | #include "common.h" // Helper functions, CHECK(), and CHECK_ZSTD() |
17 | #include <pthread.h> |
18 | |
19 | typedef struct compress_args |
20 | { |
21 | const char *fname; |
22 | char *outName; |
23 | int cLevel; |
24 | #if defined(ZSTD_STATIC_LINKING_ONLY) |
25 | ZSTD_threadPool *pool; |
26 | #endif |
27 | } compress_args_t; |
28 | |
29 | static void *compressFile_orDie(void *data) |
30 | { |
31 | const int nbThreads = 16; |
32 | |
33 | compress_args_t *args = (compress_args_t *)data; |
34 | fprintf (stderr, "Starting compression of %s with level %d, using %d threads\n", args->fname, args->cLevel, nbThreads); |
35 | /* Open the input and output files. */ |
36 | FILE* const fin = fopen_orDie(args->fname, "rb"); |
37 | FILE* const fout = fopen_orDie(args->outName, "wb"); |
38 | /* Create the input and output buffers. |
39 | * They may be any size, but we recommend using these functions to size them. |
40 | * Performance will only suffer significantly for very tiny buffers. |
41 | */ |
42 | size_t const buffInSize = ZSTD_CStreamInSize(); |
43 | void* const buffIn = malloc_orDie(buffInSize); |
44 | size_t const buffOutSize = ZSTD_CStreamOutSize(); |
45 | void* const buffOut = malloc_orDie(buffOutSize); |
46 | |
47 | /* Create the context. */ |
48 | ZSTD_CCtx* const cctx = ZSTD_createCCtx(); |
49 | CHECK(cctx != NULL, "ZSTD_createCCtx() failed!"); |
50 | |
51 | #if defined(ZSTD_STATIC_LINKING_ONLY) |
52 | size_t r = ZSTD_CCtx_refThreadPool(cctx, args->pool); |
53 | CHECK(r == 0, "ZSTD_CCtx_refThreadPool failed!"); |
54 | #endif |
55 | |
56 | /* Set any parameters you want. |
57 | * Here we set the compression level, and enable the checksum. |
58 | */ |
59 | CHECK_ZSTD( ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, args->cLevel) ); |
60 | CHECK_ZSTD( ZSTD_CCtx_setParameter(cctx, ZSTD_c_checksumFlag, 1) ); |
61 | ZSTD_CCtx_setParameter(cctx, ZSTD_c_nbWorkers, nbThreads); |
62 | |
63 | /* This loop reads from the input file, compresses that entire chunk, |
64 | * and writes all output produced to the output file. |
65 | */ |
66 | size_t const toRead = buffInSize; |
67 | for (;;) { |
68 | size_t read = fread_orDie(buffIn, toRead, fin); |
69 | /* Select the flush mode. |
70 | * If the read may not be finished (read == toRead) we use |
71 | * ZSTD_e_continue. If this is the last chunk, we use ZSTD_e_end. |
72 | * Zstd optimizes the case where the first flush mode is ZSTD_e_end, |
73 | * since it knows it is compressing the entire source in one pass. |
74 | */ |
75 | int const lastChunk = (read < toRead); |
76 | ZSTD_EndDirective const mode = lastChunk ? ZSTD_e_end : ZSTD_e_continue; |
77 | /* Set the input buffer to what we just read. |
78 | * We compress until the input buffer is empty, each time flushing the |
79 | * output. |
80 | */ |
81 | ZSTD_inBuffer input = { buffIn, read, 0 }; |
82 | int finished; |
83 | do { |
84 | /* Compress into the output buffer and write all of the output to |
85 | * the file so we can reuse the buffer next iteration. |
86 | */ |
87 | ZSTD_outBuffer output = { buffOut, buffOutSize, 0 }; |
88 | size_t const remaining = ZSTD_compressStream2(cctx, &output , &input, mode); |
89 | CHECK_ZSTD(remaining); |
90 | fwrite_orDie(buffOut, output.pos, fout); |
91 | /* If we're on the last chunk we're finished when zstd returns 0, |
92 | * which means its consumed all the input AND finished the frame. |
93 | * Otherwise, we're finished when we've consumed all the input. |
94 | */ |
95 | finished = lastChunk ? (remaining == 0) : (input.pos == input.size); |
96 | } while (!finished); |
97 | CHECK(input.pos == input.size, |
98 | "Impossible: zstd only returns 0 when the input is completely consumed!"); |
99 | |
100 | if (lastChunk) { |
101 | break; |
102 | } |
103 | } |
104 | |
105 | fprintf (stderr, "Finishing compression of %s\n", args->outName); |
106 | |
107 | ZSTD_freeCCtx(cctx); |
108 | fclose_orDie(fout); |
109 | fclose_orDie(fin); |
110 | free(buffIn); |
111 | free(buffOut); |
112 | free(args->outName); |
113 | |
114 | return NULL; |
115 | } |
116 | |
117 | |
118 | static char* createOutFilename_orDie(const char* filename) |
119 | { |
120 | size_t const inL = strlen(filename); |
121 | size_t const outL = inL + 5; |
122 | void* const outSpace = malloc_orDie(outL); |
123 | memset(outSpace, 0, outL); |
124 | strcat(outSpace, filename); |
125 | strcat(outSpace, ".zst"); |
126 | return (char*)outSpace; |
127 | } |
128 | |
129 | int main(int argc, const char** argv) |
130 | { |
131 | const char* const exeName = argv[0]; |
132 | |
133 | if (argc<=3) { |
134 | printf("wrong arguments\n"); |
135 | printf("usage:\n"); |
136 | printf("%s POOL_SIZE LEVEL FILES\n", exeName); |
137 | return 1; |
138 | } |
139 | |
140 | int pool_size = atoi (argv[1]); |
141 | CHECK(pool_size != 0, "can't parse POOL_SIZE!"); |
142 | |
143 | int level = atoi (argv[2]); |
144 | CHECK(level != 0, "can't parse LEVEL!"); |
145 | |
146 | argc -= 3; |
147 | argv += 3; |
148 | |
149 | #if defined(ZSTD_STATIC_LINKING_ONLY) |
150 | ZSTD_threadPool *pool = ZSTD_createThreadPool (pool_size); |
151 | CHECK(pool != NULL, "ZSTD_createThreadPool() failed!"); |
152 | fprintf (stderr, "Using shared thread pool of size %d\n", pool_size); |
153 | #else |
154 | fprintf (stderr, "All threads use its own thread pool\n"); |
155 | #endif |
156 | |
157 | pthread_t *threads = malloc_orDie(argc * sizeof(pthread_t)); |
158 | compress_args_t *args = malloc_orDie(argc * sizeof(compress_args_t)); |
159 | |
160 | for (unsigned i = 0; i < argc; i++) |
161 | { |
162 | args[i].fname = argv[i]; |
163 | args[i].outName = createOutFilename_orDie(args[i].fname); |
164 | args[i].cLevel = level; |
165 | #if defined(ZSTD_STATIC_LINKING_ONLY) |
166 | args[i].pool = pool; |
167 | #endif |
168 | |
169 | pthread_create (&threads[i], NULL, compressFile_orDie, &args[i]); |
170 | } |
171 | |
172 | for (unsigned i = 0; i < argc; i++) |
173 | pthread_join (threads[i], NULL); |
174 | |
175 | #if defined(ZSTD_STATIC_LINKING_ONLY) |
176 | ZSTD_freeThreadPool (pool); |
177 | #endif |
178 | |
179 | return 0; |
180 | } |