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Annotation of src/lib/libc/gen/fnmatch.c, Revision 1.11.4.1

1.11.4.1! jtc         1: /*     $NetBSD: fnmatch.c,v 1.11 1995/02/27 03:43:06 cgd Exp $ */
1.11      cgd         2:
1.1       cgd         3: /*
1.11      cgd         4:  * Copyright (c) 1989, 1993, 1994
1.6       cgd         5:  *     The Regents of the University of California.  All rights reserved.
1.1       cgd         6:  *
                      7:  * This code is derived from software contributed to Berkeley by
                      8:  * Guido van Rossum.
                      9:  *
                     10:  * Redistribution and use in source and binary forms, with or without
                     11:  * modification, are permitted provided that the following conditions
                     12:  * are met:
                     13:  * 1. Redistributions of source code must retain the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer.
                     15:  * 2. Redistributions in binary form must reproduce the above copyright
                     16:  *    notice, this list of conditions and the following disclaimer in the
                     17:  *    documentation and/or other materials provided with the distribution.
                     18:  * 3. All advertising materials mentioning features or use of this software
                     19:  *    must display the following acknowledgement:
                     20:  *     This product includes software developed by the University of
                     21:  *     California, Berkeley and its contributors.
                     22:  * 4. Neither the name of the University nor the names of its contributors
                     23:  *    may be used to endorse or promote products derived from this software
                     24:  *    without specific prior written permission.
                     25:  *
                     26:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     27:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     28:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     29:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     30:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     31:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     32:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     33:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     34:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     35:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     36:  * SUCH DAMAGE.
                     37:  */
                     38:
                     39: #if defined(LIBC_SCCS) && !defined(lint)
1.11      cgd        40: #if 0
                     41: static char sccsid[] = "@(#)fnmatch.c  8.2 (Berkeley) 4/16/94";
                     42: #else
1.11.4.1! jtc        43: static char rcsid[] = "$NetBSD: fnmatch.c,v 1.11 1995/02/27 03:43:06 cgd Exp $";
1.11      cgd        44: #endif
1.1       cgd        45: #endif /* LIBC_SCCS and not lint */
                     46:
                     47: /*
1.7       jtc        48:  * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6.
1.1       cgd        49:  * Compares a filename or pathname to a pattern.
                     50:  */
                     51:
1.11.4.1! jtc        52: #include "namespace.h"
1.3       jtc        53: #include <fnmatch.h>
1.1       cgd        54: #include <string.h>
1.11.4.1! jtc        55:
        !            56: #ifdef __weak_alias
        !            57: __weak_alias(fnmatch,_fnmatch);
        !            58: #endif
1.1       cgd        59:
                     60: #define        EOS     '\0'
                     61:
1.7       jtc        62: static const char *rangematch __P((const char *, int, int));
1.1       cgd        63:
1.9       jtc        64: int
1.1       cgd        65: fnmatch(pattern, string, flags)
1.11      cgd        66:        const char *pattern, *string;
1.1       cgd        67:        int flags;
                     68: {
1.11      cgd        69:        const char *stringstart;
                     70:        char c, test;
1.1       cgd        71:
1.11      cgd        72:        for (stringstart = string;;)
1.1       cgd        73:                switch (c = *pattern++) {
                     74:                case EOS:
1.3       jtc        75:                        return (*string == EOS ? 0 : FNM_NOMATCH);
1.1       cgd        76:                case '?':
1.8       jtc        77:                        if (*string == EOS)
1.3       jtc        78:                                return (FNM_NOMATCH);
1.8       jtc        79:                        if (*string == '/' && (flags & FNM_PATHNAME))
                     80:                                return (FNM_NOMATCH);
                     81:                        if (*string == '.' && (flags & FNM_PERIOD) &&
1.11      cgd        82:                            (string == stringstart ||
                     83:                            ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
1.8       jtc        84:                                return (FNM_NOMATCH);
                     85:                        ++string;
1.1       cgd        86:                        break;
                     87:                case '*':
                     88:                        c = *pattern;
1.3       jtc        89:                        /* Collapse multiple stars. */
1.1       cgd        90:                        while (c == '*')
                     91:                                c = *++pattern;
                     92:
1.8       jtc        93:                        if (*string == '.' && (flags & FNM_PERIOD) &&
1.11      cgd        94:                            (string == stringstart ||
                     95:                            ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
1.8       jtc        96:                                return (FNM_NOMATCH);
                     97:
1.3       jtc        98:                        /* Optimize for pattern with * at end or before /. */
1.1       cgd        99:                        if (c == EOS)
                    100:                                if (flags & FNM_PATHNAME)
1.10      jtc       101:                                        return (strchr(string, '/') == NULL ?
1.3       jtc       102:                                            0 : FNM_NOMATCH);
1.1       cgd       103:                                else
1.3       jtc       104:                                        return (0);
                    105:                        else if (c == '/' && flags & FNM_PATHNAME) {
1.10      jtc       106:                                if ((string = strchr(string, '/')) == NULL)
1.3       jtc       107:                                        return (FNM_NOMATCH);
1.1       cgd       108:                                break;
                    109:                        }
                    110:
1.3       jtc       111:                        /* General case, use recursion. */
1.1       cgd       112:                        while ((test = *string) != EOS) {
1.8       jtc       113:                                if (!fnmatch(pattern, string, flags & ~FNM_PERIOD))
1.3       jtc       114:                                        return (0);
1.1       cgd       115:                                if (test == '/' && flags & FNM_PATHNAME)
                    116:                                        break;
                    117:                                ++string;
                    118:                        }
1.3       jtc       119:                        return (FNM_NOMATCH);
1.1       cgd       120:                case '[':
1.8       jtc       121:                        if (*string == EOS)
                    122:                                return (FNM_NOMATCH);
                    123:                        if (*string == '/' && flags & FNM_PATHNAME)
1.3       jtc       124:                                return (FNM_NOMATCH);
1.11      cgd       125:                        if ((pattern =
                    126:                            rangematch(pattern, *string, flags)) == NULL)
1.3       jtc       127:                                return (FNM_NOMATCH);
1.8       jtc       128:                        ++string;
1.1       cgd       129:                        break;
                    130:                case '\\':
1.3       jtc       131:                        if (!(flags & FNM_NOESCAPE)) {
1.1       cgd       132:                                if ((c = *pattern++) == EOS) {
                    133:                                        c = '\\';
                    134:                                        --pattern;
                    135:                                }
                    136:                        }
                    137:                        /* FALLTHROUGH */
                    138:                default:
                    139:                        if (c != *string++)
1.3       jtc       140:                                return (FNM_NOMATCH);
1.1       cgd       141:                        break;
                    142:                }
1.3       jtc       143:        /* NOTREACHED */
                    144: }
                    145:
                    146: static const char *
1.7       jtc       147: rangematch(pattern, test, flags)
1.11      cgd       148:        const char *pattern;
                    149:        int test, flags;
1.3       jtc       150: {
                    151:        int negate, ok;
1.11      cgd       152:        char c, c2;
1.3       jtc       153:
1.11      cgd       154:        /*
                    155:         * A bracket expression starting with an unquoted circumflex
1.7       jtc       156:         * character produces unspecified results (IEEE 1003.2-1992,
1.11      cgd       157:         * 3.13.2).  This implementation treats it like '!', for
                    158:         * consistency with the regular expression syntax.
                    159:         * J.T. Conklin (conklin@ngai.kaleida.com)
1.3       jtc       160:         */
1.11      cgd       161:        if (negate = (*pattern == '!' || *pattern == '^'))
                    162:                ++pattern;
1.7       jtc       163:
1.3       jtc       164:        for (ok = 0; (c = *pattern++) != ']';) {
1.11      cgd       165:                if (c == '\\' && !(flags & FNM_NOESCAPE))
1.7       jtc       166:                        c = *pattern++;
1.11      cgd       167:                if (c == EOS)
1.7       jtc       168:                        return (NULL);
                    169:                if (*pattern == '-'
                    170:                    && (c2 = *(pattern+1)) != EOS && c2 != ']') {
                    171:                        pattern += 2;
1.11      cgd       172:                        if (c2 == '\\' && !(flags & FNM_NOESCAPE))
1.7       jtc       173:                                c2 = *pattern++;
1.11      cgd       174:                        if (c2 == EOS)
1.7       jtc       175:                                return (NULL);
1.11      cgd       176:                        if (c <= test && test <= c2)
1.3       jtc       177:                                ok = 1;
1.11      cgd       178:                } else if (c == test)
1.7       jtc       179:                        ok = 1;
1.3       jtc       180:        }
                    181:        return (ok == negate ? NULL : pattern);
1.1       cgd       182: }

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