wildmatch: follow Git's coding convention
[thirdparty/git.git] / wildmatch.c
CommitLineData
5230f605
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1/*
2** Do shell-style pattern matching for ?, \, [], and * characters.
3** It is 8bit clean.
4**
5** Written by Rich $alz, mirror!rs, Wed Nov 26 19:03:17 EST 1986.
6** Rich $alz is now <rsalz@bbn.com>.
7**
8** Modified by Wayne Davison to special-case '/' matching, to make '**'
9** work differently than '*', and to fix the character-class code.
10*/
11
12#include "rsync.h"
13
14/* What character marks an inverted character class? */
15#define NEGATE_CLASS '!'
16#define NEGATE_CLASS2 '^'
17
18#define FALSE 0
19#define TRUE 1
20#define ABORT_ALL -1
21#define ABORT_TO_STARSTAR -2
22
23#define CC_EQ(class, len, litmatch) ((len) == sizeof (litmatch)-1 \
24 && *(class) == *(litmatch) \
25 && strncmp((char*)class, litmatch, len) == 0)
26
27#if defined STDC_HEADERS || !defined isascii
28# define ISASCII(c) 1
29#else
30# define ISASCII(c) isascii(c)
31#endif
32
33#ifdef isblank
34# define ISBLANK(c) (ISASCII(c) && isblank(c))
35#else
36# define ISBLANK(c) ((c) == ' ' || (c) == '\t')
37#endif
38
39#ifdef isgraph
40# define ISGRAPH(c) (ISASCII(c) && isgraph(c))
41#else
42# define ISGRAPH(c) (ISASCII(c) && isprint(c) && !isspace(c))
43#endif
44
45#define ISPRINT(c) (ISASCII(c) && isprint(c))
46#define ISDIGIT(c) (ISASCII(c) && isdigit(c))
47#define ISALNUM(c) (ISASCII(c) && isalnum(c))
48#define ISALPHA(c) (ISASCII(c) && isalpha(c))
49#define ISCNTRL(c) (ISASCII(c) && iscntrl(c))
50#define ISLOWER(c) (ISASCII(c) && islower(c))
51#define ISPUNCT(c) (ISASCII(c) && ispunct(c))
52#define ISSPACE(c) (ISASCII(c) && isspace(c))
53#define ISUPPER(c) (ISASCII(c) && isupper(c))
54#define ISXDIGIT(c) (ISASCII(c) && isxdigit(c))
55
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56static int force_lower_case = 0;
57
b0e02876
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58/* Match pattern "p" against "text" */
59static int dowild(const uchar *p, const uchar *text)
5230f605 60{
327f2f3e 61 uchar p_ch;
5230f605 62
327f2f3e
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63 for ( ; (p_ch = *p) != '\0'; text++, p++) {
64 int matched, special;
65 uchar t_ch, prev_ch;
66 if ((t_ch = *text) == '\0' && p_ch != '*')
5230f605 67 return ABORT_ALL;
327f2f3e
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68 if (force_lower_case && ISUPPER(t_ch))
69 t_ch = tolower(t_ch);
70 switch (p_ch) {
71 case '\\':
72 /* Literal match with following character. Note that the test
73 * in "default" handles the p[1] == '\0' failure case. */
5230f605 74 p_ch = *++p;
327f2f3e
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75 /* FALLTHROUGH */
76 default:
77 if (t_ch != p_ch)
78 return FALSE;
79 continue;
80 case '?':
81 /* Match anything but '/'. */
82 if (t_ch == '/')
83 return FALSE;
5230f605 84 continue;
327f2f3e
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85 case '*':
86 if (*++p == '*') {
87 while (*++p == '*') {}
88 special = TRUE;
89 } else
90 special = FALSE;
91 if (*p == '\0') {
92 /* Trailing "**" matches everything. Trailing "*" matches
93 * only if there are no more slash characters. */
94 if (!special) {
95 if (strchr((char*)text, '/') != NULL)
96 return FALSE;
97 }
98 return TRUE;
99 }
100 while (1) {
101 if (t_ch == '\0')
102 break;
103 if ((matched = dowild(p, text)) != FALSE) {
104 if (!special || matched != ABORT_TO_STARSTAR)
105 return matched;
106 } else if (!special && t_ch == '/')
107 return ABORT_TO_STARSTAR;
108 t_ch = *++text;
109 }
5230f605 110 return ABORT_ALL;
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111 case '[':
112 p_ch = *++p;
113#ifdef NEGATE_CLASS2
114 if (p_ch == NEGATE_CLASS2)
115 p_ch = NEGATE_CLASS;
116#endif
117 /* Assign literal TRUE/FALSE because of "matched" comparison. */
118 special = p_ch == NEGATE_CLASS? TRUE : FALSE;
119 if (special) {
120 /* Inverted character class. */
121 p_ch = *++p;
122 }
123 prev_ch = 0;
124 matched = FALSE;
125 do {
126 if (!p_ch)
127 return ABORT_ALL;
128 if (p_ch == '\\') {
129 p_ch = *++p;
130 if (!p_ch)
131 return ABORT_ALL;
132 if (t_ch == p_ch)
133 matched = TRUE;
134 } else if (p_ch == '-' && prev_ch && p[1] && p[1] != ']') {
135 p_ch = *++p;
136 if (p_ch == '\\') {
137 p_ch = *++p;
138 if (!p_ch)
139 return ABORT_ALL;
140 }
141 if (t_ch <= p_ch && t_ch >= prev_ch)
142 matched = TRUE;
143 p_ch = 0; /* This makes "prev_ch" get set to 0. */
144 } else if (p_ch == '[' && p[1] == ':') {
145 const uchar *s;
146 int i;
147 for (s = p += 2; (p_ch = *p) && p_ch != ']'; p++) {} /*SHARED ITERATOR*/
148 if (!p_ch)
149 return ABORT_ALL;
150 i = p - s - 1;
151 if (i < 0 || p[-1] != ':') {
152 /* Didn't find ":]", so treat like a normal set. */
153 p = s - 2;
154 p_ch = '[';
155 if (t_ch == p_ch)
156 matched = TRUE;
157 continue;
158 }
159 if (CC_EQ(s,i, "alnum")) {
160 if (ISALNUM(t_ch))
161 matched = TRUE;
162 } else if (CC_EQ(s,i, "alpha")) {
163 if (ISALPHA(t_ch))
164 matched = TRUE;
165 } else if (CC_EQ(s,i, "blank")) {
166 if (ISBLANK(t_ch))
167 matched = TRUE;
168 } else if (CC_EQ(s,i, "cntrl")) {
169 if (ISCNTRL(t_ch))
170 matched = TRUE;
171 } else if (CC_EQ(s,i, "digit")) {
172 if (ISDIGIT(t_ch))
173 matched = TRUE;
174 } else if (CC_EQ(s,i, "graph")) {
175 if (ISGRAPH(t_ch))
176 matched = TRUE;
177 } else if (CC_EQ(s,i, "lower")) {
178 if (ISLOWER(t_ch))
179 matched = TRUE;
180 } else if (CC_EQ(s,i, "print")) {
181 if (ISPRINT(t_ch))
182 matched = TRUE;
183 } else if (CC_EQ(s,i, "punct")) {
184 if (ISPUNCT(t_ch))
185 matched = TRUE;
186 } else if (CC_EQ(s,i, "space")) {
187 if (ISSPACE(t_ch))
188 matched = TRUE;
189 } else if (CC_EQ(s,i, "upper")) {
190 if (ISUPPER(t_ch))
191 matched = TRUE;
192 } else if (CC_EQ(s,i, "xdigit")) {
193 if (ISXDIGIT(t_ch))
194 matched = TRUE;
195 } else /* malformed [:class:] string */
196 return ABORT_ALL;
197 p_ch = 0; /* This makes "prev_ch" get set to 0. */
198 } else if (t_ch == p_ch)
199 matched = TRUE;
200 } while (prev_ch = p_ch, (p_ch = *++p) != ']');
201 if (matched == special || t_ch == '/')
202 return FALSE;
203 continue;
204 }
5230f605 205 }
5230f605 206
327f2f3e 207 return *text ? FALSE : TRUE;
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208}
209
210/* Match the "pattern" against the "text" string. */
211int wildmatch(const char *pattern, const char *text)
212{
327f2f3e 213 return dowild((const uchar*)pattern, (const uchar*)text) == TRUE;
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214}
215
216/* Match the "pattern" against the forced-to-lower-case "text" string. */
217int iwildmatch(const char *pattern, const char *text)
218{
327f2f3e
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219 int ret;
220 force_lower_case = 1;
221 ret = dowild((const uchar*)pattern, (const uchar*)text) == TRUE;
222 force_lower_case = 0;
223 return ret;
5230f605 224}