| 0,0 → 1,109 |
|---|
| /* |
| * test suite for the unchunk() function. |
| * |
| * Copyright (C) 2021 Mateusz Viste |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <time.h> |
| #include <unistd.h> |
| |
| #include "unchunk.h" |
| |
| static size_t randchunkdata(void *file_chunked, const void *file_raw, size_t file_raw_len, int maxchunksz) { |
| size_t file_raw_read = 0; |
| size_t file_chunked_len = 0; |
| |
| for (;;) { |
| size_t chunklen = (rand() % maxchunksz) + 1; |
| if (file_raw_read + chunklen > file_raw_len) chunklen = file_raw_len - file_raw_read; |
| |
| file_chunked_len += sprintf((char *)file_chunked + file_chunked_len, "%x\r\n", chunklen); |
| if (chunklen > 0) memcpy((char *)file_chunked + file_chunked_len, (char *)file_raw + file_raw_read, chunklen); |
| file_raw_read += chunklen; |
| file_chunked_len += chunklen; |
| file_chunked_len += sprintf((char *)file_chunked + file_chunked_len, "\r\n"); |
| if (chunklen == 0) return(file_chunked_len); |
| } |
| } |
| |
| |
| /* writes buffer of fsize bytes to file fname */ |
| static void dumpfile(const char *fname, const void *buff, size_t fsize) { |
| FILE *fd; |
| fd = fopen(fname, "wb"); |
| fwrite(buff, 1, fsize, fd); |
| fclose(fd); |
| } |
| |
| |
| int main(int argc, char **argv) { |
| static unsigned char file_raw[30000u]; /* original file */ |
| static unsigned char file_chunked[60000u]; /* chunked version */ |
| static unsigned char file_decoded[60000u]; /* after being un-chunked */ |
| size_t file_raw_len; |
| size_t file_chunked_len; |
| FILE *fd; |
| int trycount; |
| |
| if ((argc != 2) || (argv[1][0] == '/')) { |
| puts("Usage: unchtest <file>"); |
| return(1); |
| } |
| |
| fd = fopen(argv[1], "rb"); |
| if (fd == NULL) { |
| puts("ERROR: failed to open file"); |
| return(1); |
| } |
| file_raw_len = fread(file_raw, 1, sizeof(file_raw), fd); |
| fclose(fd); |
| |
| printf("Loaded '%s' (%zu bytes)\r\n", argv[1], file_raw_len); |
| srand(time(NULL)); |
| |
| for (trycount = 0; trycount < 1000; trycount++) { |
| size_t bytesprocessed = 0; |
| size_t file_decoded_len = 0; |
| int maxchunksz; |
| |
| /* segment file into chunks of random size */ |
| maxchunksz = (rand() % 1024) + 1; |
| file_chunked_len = randchunkdata(file_chunked, file_raw, file_raw_len, maxchunksz); |
| |
| printf("=== TRY %d (CHUNKS: %d BYTES MAX) ======================\r\n", trycount + 1, maxchunksz); |
| |
| for (;;) { |
| size_t bytes; |
| int decodedbytes; |
| unsigned char buffer[4096]; |
| |
| bytes = min((rand() % 256) + 1, file_chunked_len - bytesprocessed); |
| printf("processing %4zu bytes of chunked data", bytes); |
| memcpy(buffer, file_chunked + bytesprocessed, bytes); |
| |
| /* decode the chunked version reading random amounts of data and build a decoded version */ |
| decodedbytes = unchunk(buffer, bytes); |
| printf(" -> decoded into %4d raw bytes\r\n", decodedbytes); |
| memcpy(file_decoded + file_decoded_len, buffer, decodedbytes); |
| file_decoded_len += decodedbytes; |
| bytesprocessed += bytes; |
| if (bytesprocessed == file_chunked_len) break; |
| } |
| |
| /* compare decoded and original */ |
| if ((file_decoded_len != file_raw_len) || (memcmp(file_decoded, file_raw, file_raw_len) != 0)) { |
| printf("ERROR: decoded file does not match the original. see tst-orig.dat, tst-chnk.txt and tst-unch.dat\r\n"); |
| dumpfile("tst-orig.dat", file_raw, file_raw_len); |
| dumpfile("tst-chnk.dat", file_chunked, file_chunked_len); |
| dumpfile("tst-unch.dat", file_decoded, file_decoded_len); |
| return(1); |
| } |
| } |
| |
| printf("OK\r\n"); |
| |
| return(0); |
| } |