| 1 | /*
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| 2 | * Do shell-style pattern matching for '?', '\', '[..]', and '*' wildcards.
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| 3 | * Returns 1 if match, 0 if not.
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| 4 | */
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| 5 |
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| 6 | #include "sysincludes.h"
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| 7 | #include "mtools.h"
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| 8 |
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| 9 |
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| 10 | static int casecmp(char a,char b)
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| 11 | {
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| 12 | return toupper(a) == toupper(b);
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| 13 | }
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| 14 |
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| 15 | static int exactcmp(char a,char b)
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| 16 | {
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| 17 | return a == b;
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| 18 | }
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| 19 |
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| 20 |
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| 21 | static int parse_range(const char **p, const char *s, char *out,
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| 22 | int (*compfn)(char a, char b))
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| 23 | {
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| 24 | char table[256];
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| 25 | int reverse;
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| 26 | int i;
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| 27 | short first, last;
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| 28 |
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| 29 | if (**p == '^') {
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| 30 | reverse = 1;
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| 31 | (*p)++;
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| 32 | } else
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| 33 | reverse=0;
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| 34 | for(i=0; i<256; i++)
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| 35 | table[i]=0;
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| 36 | while(**p != ']') {
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| 37 | if(!**p)
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| 38 | return 0;
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| 39 | if((*p)[1] == '-') {
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| 40 | first = **p;
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| 41 | (*p)+=2;
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| 42 | if(**p == ']')
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| 43 | last = 256;
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| 44 | else
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| 45 | last = *((*p)++);
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| 46 | for(i=first; i<last; i++)
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| 47 | table[i] = 1;
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| 48 | } else
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| 49 | table[(int) *((*p)++)] = 1;
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| 50 | }
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| 51 | if(out)
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| 52 | *out = *s;
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| 53 | if(table[(int) *s])
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| 54 | return 1 ^ reverse;
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| 55 | if(compfn == exactcmp)
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| 56 | return reverse;
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| 57 | if(table[tolower(*s)]) {
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| 58 | if(out)
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| 59 | *out = tolower(*s);
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| 60 | return 1 ^ reverse;
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| 61 | }
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| 62 | if(table[toupper(*s)]) {
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| 63 | if(out)
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| 64 | *out = toupper(*s);
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| 65 | return 1 ^ reverse;
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| 66 | }
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| 67 | return reverse;
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| 68 | }
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| 69 |
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| 70 |
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| 71 | static int _match(const char *s, const char *p, char *out, int Case,
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| 72 | int length,
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| 73 | int (*compfn) (char a, char b))
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| 74 | {
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| 75 | for (; *p != '\0' && length; ) {
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| 76 | switch (*p) {
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| 77 | case '?': /* match any one character */
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| 78 | if (*s == '\0')
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| 79 | return(0);
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| 80 | if(out)
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| 81 | *(out++) = *s;
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| 82 | break;
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| 83 | case '*': /* match everything */
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| 84 | while (*p == '*' && length) {
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| 85 | p++;
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| 86 | length--;
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| 87 | }
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| 88 |
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| 89 | /* search for next char in pattern */
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| 90 | while(*s) {
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| 91 | if(_match(s, p, out, Case, length,
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| 92 | compfn))
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| 93 | return 1;
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| 94 | if(out)
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| 95 | *out++ = *s;
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| 96 | s++;
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| 97 | }
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| 98 | continue;
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| 99 | case '[': /* match range of characters */
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| 100 | p++;
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| 101 | length--;
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| 102 | if(!parse_range(&p, s, out++, compfn))
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| 103 | return 0;
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| 104 | break;
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| 105 | case '\\': /* Literal match with next character */
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| 106 | p++;
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| 107 | length--;
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| 108 | /* fall thru */
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| 109 | default:
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| 110 | if (!compfn(*s,*p))
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| 111 | return(0);
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| 112 | if(out)
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| 113 | *(out++) = *p;
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| 114 | break;
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| 115 | }
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| 116 | p++;
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| 117 | length--;
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| 118 | s++;
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| 119 | }
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| 120 | if(out)
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| 121 | *out = '\0';
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| 122 |
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| 123 | /* string ended prematurely ? */
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| 124 | if (*s != '\0')
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| 125 | return(0);
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| 126 | else
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| 127 | return(1);
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| 128 | }
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| 129 |
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| 130 |
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| 131 | int match(const char *s, const char *p, char *out, int Case, int length)
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| 132 | {
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| 133 | int (*compfn)(char a, char b);
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| 134 |
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| 135 | if(Case)
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| 136 | compfn = casecmp;
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| 137 | else
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| 138 | /*compfn = exactcmp;*/
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| 139 | compfn = casecmp;
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| 140 | return _match(s, p, out, Case, length, compfn);
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| 141 | }
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| 142 |
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