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460b9539 | 1 | /* |
2 | * This file is part of DisOrder. | |
5aff007d | 3 | * Copyright (C) 2004, 2006-2008 Richard Kettlewell |
460b9539 | 4 | * |
e7eb3a27 | 5 | * This program is free software: you can redistribute it and/or modify |
460b9539 | 6 | * it under the terms of the GNU General Public License as published by |
e7eb3a27 | 7 | * the Free Software Foundation, either version 3 of the License, or |
460b9539 | 8 | * (at your option) any later version. |
e7eb3a27 RK |
9 | * |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
460b9539 | 15 | * You should have received a copy of the GNU General Public License |
e7eb3a27 | 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
460b9539 | 17 | */ |
18 | ||
05b75f8d | 19 | #include "common.h" |
460b9539 | 20 | |
21 | #include <ctype.h> | |
460b9539 | 22 | #include <errno.h> |
23 | ||
24 | #include "mem.h" | |
25 | #include "split.h" | |
26 | #include "log.h" | |
27 | #include "charset.h" | |
28 | #include "vector.h" | |
29 | ||
30 | static inline int space(int c) { | |
31 | return (c == ' ' | |
32 | || c == '\t' | |
33 | || c == '\n' | |
34 | || c == '\r'); | |
35 | } | |
36 | ||
37 | static void no_error_handler(const char attribute((unused)) *msg, | |
38 | void attribute((unused)) *u) { | |
39 | } | |
40 | ||
f9635e06 RK |
41 | /* TODO: handle combining characters attached to delimiters in some |
42 | * sane way (might include reporting an error) */ | |
43 | ||
460b9539 | 44 | char **split(const char *p, |
45 | int *np, | |
46 | unsigned flags, | |
47 | void (*error_handler)(const char *msg, void *u), | |
48 | void *u) { | |
49 | char *f, *g; | |
50 | const char *q; | |
51 | struct vector v; | |
52 | size_t l; | |
53 | int qc; | |
54 | ||
5e49fa7f RK |
55 | if(!error_handler) |
56 | error_handler = no_error_handler; | |
460b9539 | 57 | vector_init(&v); |
58 | while(*p && !(*p == '#' && (flags & SPLIT_COMMENTS))) { | |
59 | if(space(*p)) { | |
60 | ++p; | |
61 | continue; | |
62 | } | |
63 | if((flags & SPLIT_QUOTES) && (*p == '"' || *p == '\'')) { | |
64 | qc = *p++; | |
65 | l = 0; | |
66 | for(q = p; *q && *q != qc; ++q) { | |
67 | if(*q == '\\' && q[1]) | |
68 | ++q; | |
69 | ++l; | |
70 | } | |
71 | if(!*q) { | |
72 | error_handler("unterminated quoted string", u); | |
73 | return 0; | |
74 | } | |
75 | f = g = xmalloc_noptr(l + 1); | |
76 | for(q = p; *q != qc;) { | |
77 | if(*q == '\\') { | |
78 | ++q; | |
79 | switch(*q) { | |
80 | case '\\': | |
81 | case '"': | |
82 | case '\'': | |
83 | *g++ = *q++; | |
84 | break; | |
85 | case 'n': | |
86 | ++q; | |
87 | *g++ = '\n'; | |
88 | break; | |
89 | default: | |
90 | error_handler("illegal escape sequence", u); | |
91 | return 0; | |
92 | } | |
93 | } else | |
94 | *g++ = *q++; | |
95 | } | |
96 | *g = 0; | |
97 | p = q + 1; | |
98 | } else { | |
99 | for(q = p; *q && !space(*q); ++q) | |
100 | ; | |
101 | l = q - p; | |
102 | f = xstrndup(p, l); | |
103 | p = q; | |
104 | } | |
105 | vector_append(&v, f); | |
106 | } | |
107 | vector_terminate(&v); | |
108 | if(np) | |
109 | *np = v.nvec; | |
110 | return v.vec; | |
111 | } | |
112 | ||
f9635e06 RK |
113 | /* TODO handle initial combining characters sanely */ |
114 | ||
460b9539 | 115 | const char *quoteutf8(const char *s) { |
116 | size_t len = 3 + strlen(s); | |
117 | const char *t; | |
118 | char *r, *q; | |
119 | ||
120 | /* see if we need to quote */ | |
121 | if(*s) { | |
122 | for(t = s; *t; t++) | |
123 | if((unsigned char)*t <= ' ' | |
124 | || *t == '"' | |
125 | || *t == '\\' | |
126 | || *t == '\'' | |
127 | || *t == '#') | |
128 | break; | |
129 | if(!*t) | |
130 | return s; | |
131 | } | |
132 | ||
133 | /* we rely on ASCII characters only ever representing themselves in UTF-8. */ | |
134 | for(t = s; *t; t++) { | |
135 | switch(*t) { | |
136 | case '"': | |
137 | case '\\': | |
138 | case '\n': | |
139 | ++len; | |
140 | break; | |
141 | } | |
142 | } | |
143 | q = r = xmalloc_noptr(len); | |
144 | *q++ = '"'; | |
145 | for(t = s; *t; t++) { | |
146 | switch(*t) { | |
147 | case '"': | |
148 | case '\\': | |
149 | *q++ = '\\'; | |
150 | /* fall through */ | |
151 | default: | |
152 | *q++ = *t; | |
153 | break; | |
154 | case '\n': | |
155 | *q++ = '\\'; | |
156 | *q++ = 'n'; | |
157 | break; | |
158 | } | |
159 | } | |
160 | *q++ = '"'; | |
161 | *q = 0; | |
162 | return r; | |
163 | } | |
164 | ||
165 | /* | |
166 | Local Variables: | |
167 | c-basic-offset:2 | |
168 | comment-column:40 | |
169 | End: | |
170 | */ |