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Diffstat (limited to 'Build/source/utils/asymptote/cudareflect/tinyexr/deps/miniz/examples/example5.c')
-rw-r--r-- | Build/source/utils/asymptote/cudareflect/tinyexr/deps/miniz/examples/example5.c | 327 |
1 files changed, 327 insertions, 0 deletions
diff --git a/Build/source/utils/asymptote/cudareflect/tinyexr/deps/miniz/examples/example5.c b/Build/source/utils/asymptote/cudareflect/tinyexr/deps/miniz/examples/example5.c new file mode 100644 index 00000000000..a190357b3d3 --- /dev/null +++ b/Build/source/utils/asymptote/cudareflect/tinyexr/deps/miniz/examples/example5.c @@ -0,0 +1,327 @@ +// example5.c - Demonstrates how to use miniz.c's low-level tdefl_compress() and tinfl_inflate() API's for simple file to file compression/decompression. +// The low-level API's are the fastest, make no use of dynamic memory allocation, and are the most flexible functions exposed by miniz.c. +// Public domain, April 11 2012, Rich Geldreich, richgel99@gmail.com. See "unlicense" statement at the end of tinfl.c. +// For simplicity, this example is limited to files smaller than 4GB, but this is not a limitation of miniz.c. + +// Purposely disable a whole bunch of stuff this low-level example doesn't use. +#define MINIZ_NO_STDIO +#define MINIZ_NO_ARCHIVE_APIS +#define MINIZ_NO_TIME +#define MINIZ_NO_ZLIB_APIS +#define MINIZ_NO_MALLOC +#include "miniz.h" + +// Now include stdio.h because this test uses fopen(), etc. (but we still don't want miniz.c's stdio stuff, for testing). +#include <stdio.h> +#include <limits.h> + +typedef unsigned char uint8; +typedef unsigned short uint16; +typedef unsigned int uint; + +#define my_max(a,b) (((a) > (b)) ? (a) : (b)) +#define my_min(a,b) (((a) < (b)) ? (a) : (b)) + +// IN_BUF_SIZE is the size of the file read buffer. +// IN_BUF_SIZE must be >= 1 +#define IN_BUF_SIZE (1024*512) +static uint8 s_inbuf[IN_BUF_SIZE]; + +// COMP_OUT_BUF_SIZE is the size of the output buffer used during compression. +// COMP_OUT_BUF_SIZE must be >= 1 and <= OUT_BUF_SIZE +#define COMP_OUT_BUF_SIZE (1024*512) + +// OUT_BUF_SIZE is the size of the output buffer used during decompression. +// OUT_BUF_SIZE must be a power of 2 >= TINFL_LZ_DICT_SIZE (because the low-level decompressor not only writes, but reads from the output buffer as it decompresses) +//#define OUT_BUF_SIZE (TINFL_LZ_DICT_SIZE) +#define OUT_BUF_SIZE (1024*512) +static uint8 s_outbuf[OUT_BUF_SIZE]; + +// tdefl_compressor contains all the state needed by the low-level compressor so it's a pretty big struct (~300k). +// This example makes it a global vs. putting it on the stack, of course in real-world usage you'll probably malloc() or new it. +tdefl_compressor g_deflator; + +int main(int argc, char *argv[]) +{ + const char *pMode; + FILE *pInfile, *pOutfile; + uint infile_size; + int level = 9; + int p = 1; + const char *pSrc_filename; + const char *pDst_filename; + const void *next_in = s_inbuf; + size_t avail_in = 0; + void *next_out = s_outbuf; + size_t avail_out = OUT_BUF_SIZE; + size_t total_in = 0, total_out = 0; + long file_loc; + + assert(COMP_OUT_BUF_SIZE <= OUT_BUF_SIZE); + + printf("miniz.c example5 (demonstrates tinfl/tdefl)\n"); + + if (argc < 4) + { + printf("File to file compression/decompression using the low-level tinfl/tdefl API's.\n"); + printf("Usage: example5 [options] [mode:c or d] infile outfile\n"); + printf("\nModes:\n"); + printf("c - Compresses file infile to a zlib stream in file outfile\n"); + printf("d - Decompress zlib stream in file infile to file outfile\n"); + printf("\nOptions:\n"); + printf("-l[0-10] - Compression level, higher values are slower, 0 is none.\n"); + return EXIT_FAILURE; + } + + while ((p < argc) && (argv[p][0] == '-')) + { + switch (argv[p][1]) + { + case 'l': + { + level = atoi(&argv[1][2]); + if ((level < 0) || (level > 10)) + { + printf("Invalid level!\n"); + return EXIT_FAILURE; + } + break; + } + default: + { + printf("Invalid option: %s\n", argv[p]); + return EXIT_FAILURE; + } + } + p++; + } + + if ((argc - p) < 3) + { + printf("Must specify mode, input filename, and output filename after options!\n"); + return EXIT_FAILURE; + } + else if ((argc - p) > 3) + { + printf("Too many filenames!\n"); + return EXIT_FAILURE; + } + + pMode = argv[p++]; + if (!strchr("cCdD", pMode[0])) + { + printf("Invalid mode!\n"); + return EXIT_FAILURE; + } + + pSrc_filename = argv[p++]; + pDst_filename = argv[p++]; + + printf("Mode: %c, Level: %u\nInput File: \"%s\"\nOutput File: \"%s\"\n", pMode[0], level, pSrc_filename, pDst_filename); + + // Open input file. + pInfile = fopen(pSrc_filename, "rb"); + if (!pInfile) + { + printf("Failed opening input file!\n"); + return EXIT_FAILURE; + } + + // Determine input file's size. + fseek(pInfile, 0, SEEK_END); + file_loc = ftell(pInfile); + fseek(pInfile, 0, SEEK_SET); + + if ((file_loc < 0) || (file_loc > INT_MAX)) + { + // This is not a limitation of miniz or tinfl, but this example. + printf("File is too large to be processed by this example.\n"); + return EXIT_FAILURE; + } + + infile_size = (uint)file_loc; + + // Open output file. + pOutfile = fopen(pDst_filename, "wb"); + if (!pOutfile) + { + printf("Failed opening output file!\n"); + return EXIT_FAILURE; + } + + printf("Input file size: %u\n", infile_size); + + if ((pMode[0] == 'c') || (pMode[0] == 'C')) + { + // The number of dictionary probes to use at each compression level (0-10). 0=implies fastest/minimal possible probing. + static const mz_uint s_tdefl_num_probes[11] = { 0, 1, 6, 32, 16, 32, 128, 256, 512, 768, 1500 }; + + tdefl_status status; + uint infile_remaining = infile_size; + + // create tdefl() compatible flags (we have to compose the low-level flags ourselves, or use tdefl_create_comp_flags_from_zip_params() but that means MINIZ_NO_ZLIB_APIS can't be defined). + mz_uint comp_flags = TDEFL_WRITE_ZLIB_HEADER | s_tdefl_num_probes[MZ_MIN(10, level)] | ((level <= 3) ? TDEFL_GREEDY_PARSING_FLAG : 0); + if (!level) + comp_flags |= TDEFL_FORCE_ALL_RAW_BLOCKS; + + // Initialize the low-level compressor. + status = tdefl_init(&g_deflator, NULL, NULL, comp_flags); + if (status != TDEFL_STATUS_OKAY) + { + printf("tdefl_init() failed!\n"); + return EXIT_FAILURE; + } + + avail_out = COMP_OUT_BUF_SIZE; + + // Compression. + for ( ; ; ) + { + size_t in_bytes, out_bytes; + + if (!avail_in) + { + // Input buffer is empty, so read more bytes from input file. + uint n = my_min(IN_BUF_SIZE, infile_remaining); + + if (fread(s_inbuf, 1, n, pInfile) != n) + { + printf("Failed reading from input file!\n"); + return EXIT_FAILURE; + } + + next_in = s_inbuf; + avail_in = n; + + infile_remaining -= n; + //printf("Input bytes remaining: %u\n", infile_remaining); + } + + in_bytes = avail_in; + out_bytes = avail_out; + // Compress as much of the input as possible (or all of it) to the output buffer. + status = tdefl_compress(&g_deflator, next_in, &in_bytes, next_out, &out_bytes, infile_remaining ? TDEFL_NO_FLUSH : TDEFL_FINISH); + + next_in = (const char *)next_in + in_bytes; + avail_in -= in_bytes; + total_in += in_bytes; + + next_out = (char *)next_out + out_bytes; + avail_out -= out_bytes; + total_out += out_bytes; + + if ((status != TDEFL_STATUS_OKAY) || (!avail_out)) + { + // Output buffer is full, or compression is done or failed, so write buffer to output file. + uint n = COMP_OUT_BUF_SIZE - (uint)avail_out; + if (fwrite(s_outbuf, 1, n, pOutfile) != n) + { + printf("Failed writing to output file!\n"); + return EXIT_FAILURE; + } + next_out = s_outbuf; + avail_out = COMP_OUT_BUF_SIZE; + } + + if (status == TDEFL_STATUS_DONE) + { + // Compression completed successfully. + break; + } + else if (status != TDEFL_STATUS_OKAY) + { + // Compression somehow failed. + printf("tdefl_compress() failed with status %i!\n", status); + return EXIT_FAILURE; + } + } + } + else if ((pMode[0] == 'd') || (pMode[0] == 'D')) + { + // Decompression. + uint infile_remaining = infile_size; + + tinfl_decompressor inflator; + tinfl_init(&inflator); + + for ( ; ; ) + { + size_t in_bytes, out_bytes; + tinfl_status status; + if (!avail_in) + { + // Input buffer is empty, so read more bytes from input file. + uint n = my_min(IN_BUF_SIZE, infile_remaining); + + if (fread(s_inbuf, 1, n, pInfile) != n) + { + printf("Failed reading from input file!\n"); + return EXIT_FAILURE; + } + + next_in = s_inbuf; + avail_in = n; + + infile_remaining -= n; + } + + in_bytes = avail_in; + out_bytes = avail_out; + status = tinfl_decompress(&inflator, (const mz_uint8 *)next_in, &in_bytes, s_outbuf, (mz_uint8 *)next_out, &out_bytes, (infile_remaining ? TINFL_FLAG_HAS_MORE_INPUT : 0) | TINFL_FLAG_PARSE_ZLIB_HEADER); + + avail_in -= in_bytes; + next_in = (const mz_uint8 *)next_in + in_bytes; + total_in += in_bytes; + + avail_out -= out_bytes; + next_out = (mz_uint8 *)next_out + out_bytes; + total_out += out_bytes; + + if ((status <= TINFL_STATUS_DONE) || (!avail_out)) + { + // Output buffer is full, or decompression is done, so write buffer to output file. + uint n = OUT_BUF_SIZE - (uint)avail_out; + if (fwrite(s_outbuf, 1, n, pOutfile) != n) + { + printf("Failed writing to output file!\n"); + return EXIT_FAILURE; + } + next_out = s_outbuf; + avail_out = OUT_BUF_SIZE; + } + + // If status is <= TINFL_STATUS_DONE then either decompression is done or something went wrong. + if (status <= TINFL_STATUS_DONE) + { + if (status == TINFL_STATUS_DONE) + { + // Decompression completed successfully. + break; + } + else + { + // Decompression failed. + printf("tinfl_decompress() failed with status %i!\n", status); + return EXIT_FAILURE; + } + } + } + } + else + { + printf("Invalid mode!\n"); + return EXIT_FAILURE; + } + + fclose(pInfile); + if (EOF == fclose(pOutfile)) + { + printf("Failed writing to output file!\n"); + return EXIT_FAILURE; + } + + printf("Total input bytes: %u\n", (mz_uint32)total_in); + printf("Total output bytes: %u\n", (mz_uint32)total_out); + printf("Success.\n"); + return EXIT_SUCCESS; +} |