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61 lines
1.5 KiB
61 lines
1.5 KiB
#include <fnv.h>
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#include <fnvutil.h>
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#include <stdio.h>
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void updateHash512(void *context, void *buf, uint64_t length)
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{
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struct FNVHash512 *hval = (struct FNVHash512 *) context;
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fnv512UpdateBuffer(hval, buf, length);
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}
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void printVersion(void)
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{
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printf("fnv512 version 0.8.2\n");
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}
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void printHelp(void)
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{
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printf("Usage:\n\nfnv512 [FILE]...\n\n"
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"With no arguments it will read from standard input.\n"
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"This command will print the FNV-1a 512-bit hash for each listed file in order.\n");
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}
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int main(int argc, char **argv)
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{
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struct FNVHash512 hval;
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int i;
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int didSomething = 0;
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char result[129];
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int nomoreopts = 0;
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for (i = 1; i < argc; ++i) {
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char *cur = argv[i];
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if (cur[0] == '-' && !nomoreopts) {
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if (cur[1] == '-' && cur[2] == '\0') {
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nomoreopts = 1;
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continue;
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}
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if (cur[1] == 'h' || (cur[2] == 'h' && cur[1] == '-')) {
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printHelp();
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exit(0);
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}
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if (cur[1] == 'v' || (cur[2] == 'v' && cur[1] == '-')) {
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printVersion();
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exit(0);
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}
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printf("Error: unrecognized option: %s\n", cur);
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exit(1);
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}
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fnv512Init(&hval);
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fnvIterateThroughFile(cur, updateHash512, &hval);
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fnv512ResultHex(result, &hval);
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printf("%s\n", result);
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didSomething = 1;
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}
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if (!didSomething) {
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fnv512Init(&hval);
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fnvIterateThroughFile("-", updateHash512, &hval);
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fnv512ResultHex(result, &hval);
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printf("%s\n", result);
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}
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return 0;
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}
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