47 lines
742 B
C++
47 lines
742 B
C++
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#include <stdio.h>
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#include <stdlib.h>
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#include <sm_crc32.h>
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int main(int argc, char **argv)
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{
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if (argc < 2)
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{
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fprintf(stderr, "Usage: crc32 <file>\n");
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exit(1);
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}
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FILE *fp = fopen(argv[1], "rb");
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if (!fp)
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{
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fprintf(stderr, "Could not open file: %s\n", argv[1]);
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exit(1);
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}
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fseek(fp, 0, SEEK_END);
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size_t size = ftell(fp);
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if (!size)
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{
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fprintf(stderr, "Cannot checksum an empty file.\n");
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exit(1);
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}
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fseek(fp, 0, SEEK_SET);
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void *buffer = malloc(size);
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if (!buffer)
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{
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fprintf(stderr, "Unable to allocate %d bytes of memory.\n", size);
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exit(1);
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}
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fread(buffer, size, 1, fp);
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unsigned int crc32 = UTIL_CRC32(buffer, size);
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free(buffer);
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fclose(fp);
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fprintf(stdout, "%08X\n", crc32);
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return 0;
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}
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