45 lines
729 B
C
45 lines
729 B
C
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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main(int argc, char **argv)
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{
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char *f, *b, *s;
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int n;
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if(argc < 2 || argc > 3){
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fprintf(stderr, "Usage: basename string [suffix]\n");
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exit(1);
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}
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s = argv[1];
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b = s + strlen(s) - 1;
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while(b > s && *b == '/')
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b--;
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*++b = 0;
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if(b == s+1 && s[0] == '/') {
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printf("/");
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exit(0);
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}
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/* now b is after last char of string, trailing slashes removed */
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for(f = b; f >= s; f--)
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if(*f == '/'){
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f++;
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break;
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}
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if(f < s)
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f = s;
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/* now f is first char after last remaining slash, or first char */
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if(argc == 3){
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n = strlen(argv[2]);
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if(n < b-f && strncmp(b-n, argv[2], n) == 0){
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b -= n;
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*b = 0;
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}
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}
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printf("%s\n", f);
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exit(0);
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}
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