1 /* inih -- simple .INI file parser
2
3 The "inih" library is distributed under the New BSD license:
4
5 Copyright (c) 2009, Brush Technology
6 All rights reserved.
7
8 Redistribution and use in source and binary forms, with or without
9 modification, are permitted provided that the following conditions are met:
10 * Redistributions of source code must retain the above copyright
11 notice, this list of conditions and the following disclaimer.
12 * Redistributions in binary form must reproduce the above copyright
13 notice, this list of conditions and the following disclaimer in the
14 documentation and/or other materials provided with the distribution.
15 * Neither the name of Brush Technology nor the names of its contributors
16 may be used to endorse or promote products derived from this software
17 without specific prior written permission.
18
19 THIS SOFTWARE IS PROVIDED BY BRUSH TECHNOLOGY ''AS IS'' AND ANY
20 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 DISCLAIMED. IN NO EVENT SHALL BRUSH TECHNOLOGY BE LIABLE FOR ANY
23 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
26 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29
30 Go to the project home page for more info:
31 http://code.google.com/p/inih/
32
33 */
34
35 #include "global.h"
36
37 #include <stdio.h>
38 #include <ctype.h>
39 #include <string.h>
40
41 #include "ini.h"
42
43 #define MAX_LINE 5000
44 #define MAX_SECTION MAX_SECTION_NAME
45 #define MAX_NAME MAX_PROPERTY_NAME
46
47 /* Strip whitespace chars off end of given string, in place. Return s. */
rstrip(char * s)48 static char* rstrip(char* s)
49 {
50 char* p = s + strlen(s);
51 while (p > s && isspace(*--p))
52 *p = '\0';
53 return s;
54 }
55
56 /* Return pointer to first non-whitespace char in given string. */
lskip(const char * s)57 static char* lskip(const char* s)
58 {
59 while (*s && isspace(*s))
60 s++;
61 return (char*)s;
62 }
63
64 /* Return pointer to first char c or ';' comment in given string, or pointer to
65 null at end of string if neither found. ';' must be prefixed by a whitespace
66 character to register as a comment. */
find_char_or_comment(const char * s,char c)67 static char* find_char_or_comment(const char* s, char c)
68 {
69 int was_whitespace = 0;
70 while (*s && *s != c && !(was_whitespace && (*s == ';' || *s == '#'))) {
71 was_whitespace = isspace(*s);
72 s++;
73 }
74 return (char*)s;
75 }
76
find_last_char_or_comment(const char * s,char c)77 static char* find_last_char_or_comment(const char* s, char c)
78 {
79 const char* last_char = s;
80 int was_whitespace = 0;
81 while (*s && !(was_whitespace && (*s == ';' || *s == '#'))) {
82 if (*s == c)
83 last_char = s;
84 was_whitespace = isspace(*s);
85 s++;
86 }
87 return (char*)last_char;
88 }
89
90 /* Version of strncpy that ensures dest (size bytes) is null-terminated. */
strncpy0(char * dest,const char * src,size_t size)91 static char* strncpy0(char* dest, const char* src, size_t size)
92 {
93 strncpy(dest, src, size);
94 dest[size - 1] = '\0';
95 return dest;
96 }
97
98 /* See documentation in header file. */
99 EDITORCONFIG_LOCAL
ini_parse_file(FILE * file,int (* handler)(void *,const char *,const char *,const char *),void * user)100 int ini_parse_file(FILE* file,
101 int (*handler)(void*, const char*, const char*,
102 const char*),
103 void* user)
104 {
105 /* Uses a fair bit of stack (use heap instead if you need to) */
106 char line[MAX_LINE];
107 char section[MAX_SECTION+1] = "";
108 char prev_name[MAX_NAME+1] = "";
109
110 char* start;
111 char* end;
112 char* name;
113 char* value;
114 int lineno = 0;
115 int error = 0;
116
117 /* Scan through file line by line */
118 while (fgets(line, sizeof(line), file) != NULL) {
119 lineno++;
120
121 start = line;
122 #if INI_ALLOW_BOM
123 if (lineno == 1 && (unsigned char)start[0] == 0xEF &&
124 (unsigned char)start[1] == 0xBB &&
125 (unsigned char)start[2] == 0xBF) {
126 start += 3;
127 }
128 #endif
129 start = lskip(rstrip(start));
130
131 if (*start == ';' || *start == '#') {
132 /* Per Python ConfigParser, allow '#' comments at start of line */
133 }
134 #if INI_ALLOW_MULTILINE
135 else if (*prev_name && *start && start > line) {
136 /* Non-black line with leading whitespace, treat as continuation
137 of previous name's value (as per Python ConfigParser). */
138 if (!handler(user, section, prev_name, start) && !error)
139 error = lineno;
140 }
141 #endif
142 else if (*start == '[') {
143 /* A "[section]" line */
144 end = find_last_char_or_comment(start + 1, ']');
145 if (*end == ']') {
146 *end = '\0';
147 /* Section name too long. Skipped. */
148 if (end - start - 1 > MAX_SECTION_NAME)
149 continue;
150 strncpy0(section, start + 1, sizeof(section));
151 *prev_name = '\0';
152 }
153 else if (!error) {
154 /* No ']' found on section line */
155 error = lineno;
156 }
157 }
158 else if (*start && (*start != ';' || *start == '#')) {
159 /* Not a comment, must be a name[=:]value pair */
160 end = find_char_or_comment(start, '=');
161 if (*end != '=') {
162 end = find_char_or_comment(start, ':');
163 }
164 if (*end == '=' || *end == ':') {
165 *end = '\0';
166 name = rstrip(start);
167 value = lskip(end + 1);
168 end = find_char_or_comment(value, '\0');
169 if (*end == ';' || *end == '#')
170 *end = '\0';
171 rstrip(value);
172
173 /* Either name or value is too long. Skip it. */
174 if (strlen(name) > MAX_PROPERTY_NAME ||
175 strlen(value) > MAX_PROPERTY_VALUE)
176 continue;
177
178 /* Valid name[=:]value pair found, call handler */
179 strncpy0(prev_name, name, sizeof(prev_name));
180 if (!handler(user, section, name, value) && !error)
181 error = lineno;
182 }
183 else if (!error) {
184 /* No '=' or ':' found on name[=:]value line */
185 error = lineno;
186 }
187 }
188 }
189
190 return error;
191 }
192
193 /* See documentation in header file. */
194 EDITORCONFIG_LOCAL
ini_parse(const char * filename,int (* handler)(void *,const char *,const char *,const char *),void * user)195 int ini_parse(const char* filename,
196 int (*handler)(void*, const char*, const char*, const char*),
197 void* user)
198 {
199 FILE* file;
200 int error;
201
202 file = fopen(filename, "r");
203 if (!file)
204 return -1;
205 error = ini_parse_file(file, handler, user);
206 fclose(file);
207 return error;
208 }
209