60 lines
1.0 KiB
C
60 lines
1.0 KiB
C
#include <ctype.h>
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#include <stdio.h>
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#include <string.h>
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#include <libgen.h>
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#include <stdlib.h>
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int main(int argc, char **argv) {
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int i;
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FILE *a, *b, *out;
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unsigned char ca, cb;
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char *pathname;
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char *filename;
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if(argc != 5) {
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fprintf(stderr, "Usage\r\n\t%s <basename> <input0> <input1> <output>\r\n", argv[0]);
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return -1;
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}
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a = fopen(argv[2], "rb");
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if(!a) {
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fprintf(stderr, "Unable to open file '%s' for input.\r\n", argv[2]);
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return -1;
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}
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b = fopen(argv[3], "rb");
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if(!b) {
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fprintf(stderr, "Unable to open file '%s' for input.\r\n", argv[3]);
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fclose(a);
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return -1;
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}
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out = fopen(argv[4], "wb");
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if(!out) {
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fprintf(stderr, "Unable to open file '%s' for output.\r\n", argv[4]);
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fclose(a);
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fclose(b);
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return -1;
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}
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for(i=0; i < 16; i++) {
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if(i < strlen(argv[1])) {
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fputc(toupper(argv[1][i]), out);
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} else {
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fputc(0, out);
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}
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}
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for(i=0; i < 2048; i++) {
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ca = fgetc(a);
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cb = fgetc(b);
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fputc((ca ^ cb), out);
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}
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fclose(a);
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fclose(b);
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fclose(out);
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return 0;
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}
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