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76 lines
1.7 KiB
76 lines
1.7 KiB
#include <ctype.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <getopt.h>
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const char compare_string[] = "DOUBLEPLUS UNZIP, FACTOR=";
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int main (int argc, char **argv){
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FILE *bob, *joe;
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int modifier, factor, thing, i;
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int out = 0;
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char output[FILENAME_MAX];
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while((modifier=getopt(argc,argv,"c"))+1){
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switch(modifier){
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case 'c':
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joe=stdout;
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out = 1;
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break;
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default:
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fprintf(stderr,"modifier=%d\n",modifier);
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fputs("You're going to have to be clearer about what you want.\n",stderr);
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return EXIT_FAILURE;
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}
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}
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argc-=optind;
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argv+=optind;
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if(argc < 1){
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fputs("I pity the fool who don't have an input file!\n",stderr);
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return EXIT_FAILURE;
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}
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if(strlen(argv[0]) <= 4 || strcmp(argv[0] + strlen(argv[0]) - 4, ".dpu"))
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{
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fputs("Where's the rest of the filename?\n", stderr);
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return EXIT_FAILURE;
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}
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if((bob = fopen(argv[0],"r"))==NULL){
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fputs("That's no input file, THAT'S A SPACE STATION!\n",stderr);
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return EXIT_FAILURE;
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}
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for(i = 0; compare_string[i]; i++) {
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thing = fgetc(bob);
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if(thing != compare_string[i]) {
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fputs("You suck! That's not a DPU file!\n", stderr);
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return EXIT_FAILURE;
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}
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}
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factor=0;
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for(;;){
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thing=fgetc(bob);
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if(isdigit(thing)){
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factor=(factor*10)+(thing-'0');
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}else if(thing==';'){
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break;
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}else{
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fputs("You should make it work!\n",stderr);
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return EXIT_FAILURE;
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}
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}
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if(!out){
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strlcpy(output,argv[0],strlen(argv[0])-3);
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fprintf(stderr,"%s",output);
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if((joe = fopen(output,"w"))==NULL){
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fputs("Ummm, the output file doesn't work.\n",stderr);
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return EXIT_FAILURE;
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}
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}
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while((thing=fgetc(bob))!=EOF){
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fputc(thing,joe);
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int i;
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for(i=0;i<factor;i++){
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thing = fgetc(bob);
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}
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}
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return 0;
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}
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