74 lines
1.5 KiB
C
74 lines
1.5 KiB
C
#include <assert.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include <inttypes.h>
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#include "crc32.c"
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int read_file(const char * filename, uint8_t ** buf, uint32_t * size_out)
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{
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FILE * file = fopen(filename, "rb");
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if (file == NULL) {
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fprintf(stderr, "fopen(\"%s\", \"rb\"): %s\n", filename, strerror(errno));
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return -1;
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}
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int ret;
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ret = fseek(file, 0L, SEEK_END);
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if (ret < 0) {
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fprintf(stderr, "fseek(SEEK_END)");
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return -1;
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}
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long offset = ftell(file);
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if (offset < 0) {
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fprintf(stderr, "ftell");
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return -1;
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}
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size_t size = offset;
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ret = fseek(file, 0L, SEEK_SET);
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if (ret < 0) {
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fprintf(stderr, "fseek(SEEK_SET)");
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return -1;
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}
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fprintf(stderr, "read_file: %s size %ld\n", filename, size);
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*buf = (uint8_t *)malloc(size);
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size_t fread_size = fread(*buf, 1, size, file);
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if (fread_size != size) {
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fprintf(stderr, "fread `%s` short read: %" PRIu64 " ; expected: %" PRIu64 "\n", filename, fread_size, size);
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return -1;
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}
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ret = fclose(file);
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if (ret < 0) {
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fprintf(stderr, "fclose");
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return -1;
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}
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*size_out = size;
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return 0;
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}
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int main(int argc, char * argv[])
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{
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assert(argc == 2);
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uint8_t * buf;
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uint32_t size;
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int ret = read_file(argv[1], &buf, &size);
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assert(ret == 0);
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printf("size: %08x\n", size);
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int chunks = size / 2048;
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printf("crc:\n");
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for (int i = 0; i < chunks; i++) {
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uint32_t crc = crc32(&buf[i * 2048], 2048);
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printf("0x%08x\n", crc);
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}
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}
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