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Diffstat (limited to 'Build/source/utils/asymptote/cudareflect/tinyexr/deps/miniz/examples/example3.c')
-rw-r--r-- | Build/source/utils/asymptote/cudareflect/tinyexr/deps/miniz/examples/example3.c | 269 |
1 files changed, 269 insertions, 0 deletions
diff --git a/Build/source/utils/asymptote/cudareflect/tinyexr/deps/miniz/examples/example3.c b/Build/source/utils/asymptote/cudareflect/tinyexr/deps/miniz/examples/example3.c new file mode 100644 index 00000000000..a97ba8420ff --- /dev/null +++ b/Build/source/utils/asymptote/cudareflect/tinyexr/deps/miniz/examples/example3.c @@ -0,0 +1,269 @@ +// example3.c - Demonstrates how to use miniz.c's deflate() and inflate() functions for simple file compression. +// Public domain, May 15 2011, 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. +#include <stdio.h> +#include <limits.h> +#include "miniz.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)) + +#define BUF_SIZE (1024 * 1024) +static uint8 s_inbuf[BUF_SIZE]; +static uint8 s_outbuf[BUF_SIZE]; + +int main(int argc, char *argv[]) +{ + const char *pMode; + FILE *pInfile, *pOutfile; + uint infile_size; + int level = Z_BEST_COMPRESSION; + z_stream stream; + int p = 1; + const char *pSrc_filename; + const char *pDst_filename; + long file_loc; + + printf("miniz.c version: %s\n", MZ_VERSION); + + if (argc < 4) + { + printf("Usage: example3 [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.\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); + + // Init the z_stream + memset(&stream, 0, sizeof(stream)); + stream.next_in = s_inbuf; + stream.avail_in = 0; + stream.next_out = s_outbuf; + stream.avail_out = BUF_SIZE; + + if ((pMode[0] == 'c') || (pMode[0] == 'C')) + { + // Compression. + uint infile_remaining = infile_size; + + if (deflateInit(&stream, level) != Z_OK) + { + printf("deflateInit() failed!\n"); + return EXIT_FAILURE; + } + + for ( ; ; ) + { + int status; + if (!stream.avail_in) + { + // Input buffer is empty, so read more bytes from input file. + uint n = my_min(BUF_SIZE, infile_remaining); + + if (fread(s_inbuf, 1, n, pInfile) != n) + { + printf("Failed reading from input file!\n"); + return EXIT_FAILURE; + } + + stream.next_in = s_inbuf; + stream.avail_in = n; + + infile_remaining -= n; + //printf("Input bytes remaining: %u\n", infile_remaining); + } + + status = deflate(&stream, infile_remaining ? Z_NO_FLUSH : Z_FINISH); + + if ((status == Z_STREAM_END) || (!stream.avail_out)) + { + // Output buffer is full, or compression is done, so write buffer to output file. + uint n = BUF_SIZE - stream.avail_out; + if (fwrite(s_outbuf, 1, n, pOutfile) != n) + { + printf("Failed writing to output file!\n"); + return EXIT_FAILURE; + } + stream.next_out = s_outbuf; + stream.avail_out = BUF_SIZE; + } + + if (status == Z_STREAM_END) + break; + else if (status != Z_OK) + { + printf("deflate() failed with status %i!\n", status); + return EXIT_FAILURE; + } + } + + if (deflateEnd(&stream) != Z_OK) + { + printf("deflateEnd() failed!\n"); + return EXIT_FAILURE; + } + } + else if ((pMode[0] == 'd') || (pMode[0] == 'D')) + { + // Decompression. + uint infile_remaining = infile_size; + + if (inflateInit(&stream)) + { + printf("inflateInit() failed!\n"); + return EXIT_FAILURE; + } + + for ( ; ; ) + { + int status; + if (!stream.avail_in) + { + // Input buffer is empty, so read more bytes from input file. + uint n = my_min(BUF_SIZE, infile_remaining); + + if (fread(s_inbuf, 1, n, pInfile) != n) + { + printf("Failed reading from input file!\n"); + return EXIT_FAILURE; + } + + stream.next_in = s_inbuf; + stream.avail_in = n; + + infile_remaining -= n; + } + + status = inflate(&stream, Z_SYNC_FLUSH); + + if ((status == Z_STREAM_END) || (!stream.avail_out)) + { + // Output buffer is full, or decompression is done, so write buffer to output file. + uint n = BUF_SIZE - stream.avail_out; + if (fwrite(s_outbuf, 1, n, pOutfile) != n) + { + printf("Failed writing to output file!\n"); + return EXIT_FAILURE; + } + stream.next_out = s_outbuf; + stream.avail_out = BUF_SIZE; + } + + if (status == Z_STREAM_END) + break; + else if (status != Z_OK) + { + printf("inflate() failed with status %i!\n", status); + return EXIT_FAILURE; + } + } + + if (inflateEnd(&stream) != Z_OK) + { + printf("inflateEnd() failed!\n"); + 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)stream.total_in); + printf("Total output bytes: %u\n", (mz_uint32)stream.total_out); + printf("Success.\n"); + return EXIT_SUCCESS; +} |