summaryrefslogtreecommitdiff
path: root/Build/source/libs/unzip/match.c
blob: 34954742ee0f5cb2cd247ed597758e23162c33a0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
/*---------------------------------------------------------------------------

  match.c

  The match() routine recursively compares a string to a "pattern" (regular
  expression), returning TRUE if a match is found or FALSE if not.  This
  version is specifically for use with unzip.c:  as did the previous match()
  routines from SEA and J. Kercheval, it leaves the case (upper, lower, or
  mixed) of the string alone, but converts any uppercase characters in the
  pattern to lowercase if indicated by the global var pInfo->lcflag (which
  is to say, string is assumed to have been converted to lowercase already,
  if such was necessary).

  GRR:  reversed order of text, pattern in matche() (now same as match());
        added ignore_case/ic flags, Case() macro.

  PaulK:  replaced matche() with recmatch() from Zip, modified to have an
          ignore_case argument; replaced test frame with simpler one.

  ---------------------------------------------------------------------------

  Copyright on recmatch() from Zip's util.c (although recmatch() was almost
  certainly written by Mark Adler...ask me how I can tell :-) ):

     Copyright (C) 1990-1992 Mark Adler, Richard B. Wales, Jean-loup Gailly,
     Kai Uwe Rommel and Igor Mandrichenko.

     Permission is granted to any individual or institution to use, copy,
     or redistribute this software so long as all of the original files are
     included unmodified, that it is not sold for profit, and that this copy-
     right notice is retained.

  ---------------------------------------------------------------------------

  Match the pattern (wildcard) against the string (fixed):

     match(string, pattern, ignore_case);

  returns TRUE if string matches pattern, FALSE otherwise.  In the pattern:

     `*' matches any sequence of characters (zero or more)
     `?' matches any single character
     [SET] matches any character in the specified set,
     [!SET] or [^SET] matches any character not in the specified set.

  A set is composed of characters or ranges; a range looks like ``character
  hyphen character'' (as in 0-9 or A-Z).  [0-9a-zA-Z_] is the minimal set of
  characters allowed in the [..] pattern construct.  Other characters are
  allowed (i.e., 8-bit characters) if your system will support them.

  To suppress the special syntactic significance of any of ``[]*?!^-\'', in-
  side or outside a [..] construct, and match the character exactly, precede
  it with a ``\'' (backslash).

  Note that "*.*" and "*." are treated specially under MS-DOS if DOSWILD is
  defined.  See the DOSWILD section below for an explanation.  Note also
  that with VMSWILD defined, '%' is used instead of '?', and sets (ranges)
  are delimited by () instead of [].

  ---------------------------------------------------------------------------*/



/* define ToLower() in here (for Unix, define ToLower to be macro (using
 * isupper()); otherwise just use tolower() */
#define UNZIP_INTERNAL
#include "unzip.h"

#if 0  /* this is not useful until it matches Amiga names insensitively */
#ifdef AMIGA        /* some other platforms might also want to use this */
#  define ANSI_CHARSET       /* MOVE INTO UNZIP.H EVENTUALLY */
#endif
#endif /* 0 */
  
#ifdef ANSI_CHARSET
#  ifdef ToLower
#    undef ToLower
#  endif
   /* uppercase letters are values 41 thru 5A, C0 thru D6, and D8 thru DE */
#  define IsUpper(c) (c>=0xC0 ? c<=0xDE && c!=0xD7 : c>=0x41 && c<=0x5A)
#  define ToLower(c) (IsUpper((uch) c) ? (unsigned) c | 0x20 : (unsigned) c)
#endif
#define Case(x)  (ic? ToLower(x) : (x))

#ifdef VMSWILD
#  define WILDCHAR   '%'
#  define BEG_RANGE  '('
#  define END_RANGE  ')'
#else
#  define WILDCHAR   '?'
#  define BEG_RANGE  '['
#  define END_RANGE  ']'
#endif

#if 0                /* GRR:  add this to unzip.h someday... */
#if !(defined(MSDOS) && defined(DOSWILD))
#define match(s,p,ic)   (recmatch((ZCONST uch *)p,(ZCONST uch *)s,ic) == 1)
int recmatch OF((ZCONST uch *pattern, ZCONST uch *string, int ignore_case));
#endif
#endif /* 0 */
static int recmatch OF((ZCONST uch *pattern, ZCONST uch *string,
                        int ignore_case));



/* match() is a shell to recmatch() to return only Boolean values. */

int match(string, pattern, ignore_case)
    ZCONST char *string, *pattern;
    int ignore_case;
{
#if (defined(MSDOS) && defined(DOSWILD))
    char *dospattern;
    int j = strlen(pattern);

/*---------------------------------------------------------------------------
    Optional MS-DOS preprocessing section:  compare last three chars of the
    wildcard to "*.*" and translate to "*" if found; else compare the last
    two characters to "*." and, if found, scan the non-wild string for dots.
    If in the latter case a dot is found, return failure; else translate the
    "*." to "*".  In either case, continue with the normal (Unix-like) match
    procedure after translation.  (If not enough memory, default to normal
    match.)  This causes "a*.*" and "a*." to behave as MS-DOS users expect.
  ---------------------------------------------------------------------------*/

    if ((dospattern = (char *)malloc(j+1)) != NULL) {
        strcpy(dospattern, pattern);
        if (!strcmp(dospattern+j-3, "*.*")) {
            dospattern[j-2] = '\0';                    /* nuke the ".*" */
        } else if (!strcmp(dospattern+j-2, "*.")) {
            char *p = strchr(string, '.');

            if (p) {   /* found a dot:  match fails */
                free(dospattern);
                return 0;
            }
            dospattern[j-1] = '\0';                    /* nuke the end "." */
        }
        j = recmatch((uch *)dospattern, (uch *)string, ignore_case);
        free(dospattern);
        return j == 1;
    } else
#endif /* MSDOS && DOSWILD */
    return recmatch((uch *)pattern, (uch *)string, ignore_case) == 1;
}



static int recmatch(p, s, ic)
    ZCONST uch *p;        /* sh pattern to match */
    ZCONST uch *s;        /* string to which to match it */
    int ic;               /* true for case insensitivity */
/* Recursively compare the sh pattern p with the string s and return 1 if
 * they match, and 0 or 2 if they don't or if there is a syntax error in the
 * pattern.  This routine recurses on itself no more deeply than the number
 * of characters in the pattern. */
{
    unsigned int c;       /* pattern char or start of range in [-] loop */ 

    /* Get first character, the pattern for new recmatch calls follows */
    c = *p++;

    /* If that was the end of the pattern, match if string empty too */
    if (c == 0)
        return *s == 0;

    /* '?' (or '%') matches any character (but not an empty string) */
    if (c == WILDCHAR)
        return *s ? recmatch(p, s + 1, ic) : 0;

    /* '*' matches any number of characters, including zero */
#ifdef AMIGA
    if (c == '#' && *p == '?')     /* "#?" is Amiga-ese for "*" */
        c = '*', p++;
#endif /* AMIGA */
    if (c == '*') {
        if (*p == 0)
            return 1;
        for (; *s; s++)
            if ((c = recmatch(p, s, ic)) != 0)
                return (int)c;
        return 2;       /* 2 means give up--match will return false */
    }

    /* Parse and process the list of characters and ranges in brackets */
    if (c == BEG_RANGE) {
        int e;          /* flag true if next char to be taken literally */
        ZCONST uch *q;  /* pointer to end of [-] group */
        int r;          /* flag true to match anything but the range */

        if (*s == 0)                           /* need a character to match */
            return 0;
        p += (r = (*p == '!' || *p == '^'));   /* see if reverse */
        for (q = p, e = 0; *q; q++)            /* find closing bracket */
            if (e)
                e = 0;
            else
                if (*q == '\\')      /* GRR:  change to ^ for MS-DOS, OS/2? */
                    e = 1;
                else if (*q == END_RANGE)
                    break;
        if (*q != END_RANGE)         /* nothing matches if bad syntax */
            return 0;
        for (c = 0, e = *p == '-'; p < q; p++) {  /* go through the list */
            if (e == 0 && *p == '\\')             /* set escape flag if \ */
                e = 1;
            else if (e == 0 && *p == '-')         /* set start of range if - */
                c = *(p-1);
            else {
                unsigned int cc = Case(*s);

                if (*(p+1) != '-')
                    for (c = c ? c : *p; c <= *p; c++)  /* compare range */
                        if ((unsigned)Case(c) == cc)  /* typecast for MSC bug */
                            return r ? 0 : recmatch(q + 1, s + 1, ic);
                c = e = 0;   /* clear range, escape flags */
            }
        }
        return r ? recmatch(q + 1, s + 1, ic) : 0;  /* bracket match failed */
    }

    /* if escape ('\'), just compare next character */
    if (c == '\\' && (c = *p++) == 0)     /* if \ at end, then syntax error */
        return 0;

    /* just a character--compare it */
#ifdef QDOS
    return QMatch(Case((uch)c), Case(*s)) ? recmatch(p, ++s, ic) : 0;
#else
    return Case((uch)c) == Case(*s) ? recmatch(p, ++s, ic) : 0;
#endif

} /* end function recmatch() */





int iswild(p)        /* originally only used for stat()-bug workaround in */
    ZCONST char *p;  /*  VAX C, Turbo/Borland C, Watcom C, Atari MiNT libs; */
{                    /*  now used in process_zipfiles() as well */
    for (; *p; ++p)
        if (*p == '\\' && *(p+1))
            ++p;
#ifdef VMS
        else if (*p == '%' || *p == '*')
#else /* !VMS */
#ifdef AMIGA
        else if (*p == '?' || *p == '*' || (*p=='#' && p[1]=='?') || *p == '[')
#else /* !AMIGA */
        else if (*p == '?' || *p == '*' || *p == '[')
#endif /* ?AMIGA */
#endif /* ?VMS */
#ifdef QDOS
            return (int)p;
#else
            return TRUE;
#endif

    return FALSE;

} /* end function iswild() */





#ifdef TEST_MATCH

#define put(s) {fputs(s,stdout); fflush(stdout);}

void main()
{
    char pat[256], str[256];

    for (;;) {
        put("Pattern (return to exit): ");
        gets(pat);
        if (!pat[0])
            break;
        for (;;) {
            put("String (return for new pattern): ");
            gets(str);
            if (!str[0])
                break;
            printf("Case sensitive: %s  insensitive: %s\n",
              match(str, pat, 0) ? "YES" : "NO",
              match(str, pat, 1) ? "YES" : "NO");
        }
    }
    EXIT(0);
}

#endif /* TEST_MATCH */