author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Mon, 04 Oct 2010 02:56:42 +0300 | |
changeset 68 | ff3fc7722556 |
parent 18 | 47c74d1534e1 |
permissions | -rw-r--r-- |
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/* GIO - GLib Input, Output and Streaming Library |
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* |
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* Copyright (C) 2006-2007 Red Hat, Inc. |
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* Portions copyright (c) 2009 Nokia Corporation. All rights reserved. |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General |
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* Public License along with this library; if not, write to the |
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* Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
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* Boston, MA 02111-1307, USA. |
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* |
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* Author: Alexander Larsson <alexl@redhat.com> |
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*/ |
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|
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#include "config.h" |
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#include "gurifuncs.h" |
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#include "string.h" |
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#include "galias.h" |
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/** |
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* SECTION:gurifuncs |
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* @short_description: URI Functions |
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* |
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* Functions for manipulating Universal Resource Identifiers (URIs) as |
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* defined by <ulink url="http://www.ietf.org/rfc/rfc3986.txt"> |
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* RFC 3986</ulink>. It is highly recommended that you have read and |
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* understand RFC 3986 for understanding this API. |
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*/ |
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|
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static int |
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unescape_character (const char *scanner) |
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{ |
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int first_digit; |
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int second_digit; |
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first_digit = g_ascii_xdigit_value (*scanner++); |
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if (first_digit < 0) |
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return -1; |
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second_digit = g_ascii_xdigit_value (*scanner++); |
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if (second_digit < 0) |
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return -1; |
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return (first_digit << 4) | second_digit; |
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} |
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|
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/** |
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* g_uri_unescape_segment: |
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* @escaped_string: a string. |
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* @escaped_string_end: a string. |
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* @illegal_characters: an optional string of illegal characters not to be allowed. |
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* |
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* Unescapes a segment of an escaped string. |
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* |
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* If any of the characters in @illegal_characters or the character zero appears |
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* as an escaped character in @escaped_string then that is an error and %NULL |
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* will be returned. This is useful it you want to avoid for instance having a |
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* slash being expanded in an escaped path element, which might confuse pathname |
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* handling. |
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* |
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* Returns: an unescaped version of @escaped_string or %NULL on error. |
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* The returned string should be freed when no longer needed. |
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* |
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* Since: 2.16 |
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**/ |
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EXPORT_C char * |
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g_uri_unescape_segment (const char *escaped_string, |
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const char *escaped_string_end, |
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const char *illegal_characters) |
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{ |
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const char *in; |
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char *out, *result; |
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gint character; |
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if (escaped_string == NULL) |
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return NULL; |
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|
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if (escaped_string_end == NULL) |
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escaped_string_end = escaped_string + strlen (escaped_string); |
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result = g_malloc (escaped_string_end - escaped_string + 1); |
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out = result; |
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for (in = escaped_string; in < escaped_string_end; in++) |
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{ |
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character = *in; |
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if (*in == '%') |
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{ |
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in++; |
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if (escaped_string_end - in < 2) |
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{ |
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103 |
/* Invalid escaped char (to short) */ |
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104 |
g_free (result); |
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105 |
return NULL; |
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106 |
} |
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107 |
|
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108 |
character = unescape_character (in); |
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109 |
|
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110 |
/* Check for an illegal character. We consider '\0' illegal here. */ |
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111 |
if (character <= 0 || |
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112 |
(illegal_characters != NULL && |
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113 |
strchr (illegal_characters, (char)character) != NULL)) |
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114 |
{ |
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g_free (result); |
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return NULL; |
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117 |
} |
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118 |
|
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119 |
in++; /* The other char will be eaten in the loop header */ |
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120 |
} |
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*out++ = (char)character; |
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122 |
} |
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123 |
|
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124 |
*out = '\0'; |
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125 |
|
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126 |
return result; |
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127 |
} |
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128 |
|
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129 |
/** |
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130 |
* g_uri_unescape_string: |
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131 |
* @escaped_string: an escaped string to be unescaped. |
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132 |
* @illegal_characters: an optional string of illegal characters not to be allowed. |
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133 |
* |
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134 |
* Unescapes a whole escaped string. |
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135 |
* |
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136 |
* If any of the characters in @illegal_characters or the character zero appears |
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137 |
* as an escaped character in @escaped_string then that is an error and %NULL |
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138 |
* will be returned. This is useful it you want to avoid for instance having a |
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139 |
* slash being expanded in an escaped path element, which might confuse pathname |
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140 |
* handling. |
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141 |
* |
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142 |
* Returns: an unescaped version of @escaped_string. The returned string |
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143 |
* should be freed when no longer needed. |
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144 |
* |
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145 |
* Since: 2.16 |
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146 |
**/ |
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147 |
EXPORT_C char * |
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148 |
g_uri_unescape_string (const char *escaped_string, |
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149 |
const char *illegal_characters) |
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150 |
{ |
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151 |
return g_uri_unescape_segment (escaped_string, NULL, illegal_characters); |
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152 |
} |
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153 |
|
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154 |
/** |
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155 |
* g_uri_parse_scheme: |
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156 |
* @uri: a valid URI. |
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157 |
* |
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158 |
* Gets the scheme portion of a URI string. RFC 3986 decodes the scheme as: |
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159 |
* <programlisting> |
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160 |
* URI = scheme ":" hier-part [ "?" query ] [ "#" fragment ] |
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161 |
* </programlisting> |
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162 |
* Common schemes include "file", "http", "svn+ssh", etc. |
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163 |
* |
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164 |
* Returns: The "Scheme" component of the URI, or %NULL on error. |
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165 |
* The returned string should be freed when no longer needed. |
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166 |
* |
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167 |
* Since: 2.16 |
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168 |
**/ |
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169 |
EXPORT_C char * |
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170 |
g_uri_parse_scheme (const char *uri) |
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171 |
{ |
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172 |
const char *p; |
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173 |
char c; |
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174 |
|
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175 |
g_return_val_if_fail (uri != NULL, NULL); |
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176 |
|
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|
177 |
/* From RFC 3986 Decodes: |
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178 |
* URI = scheme ":" hier-part [ "?" query ] [ "#" fragment ] |
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179 |
*/ |
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180 |
|
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181 |
p = uri; |
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182 |
|
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183 |
/* Decode scheme: |
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184 |
scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." ) |
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185 |
*/ |
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|
186 |
|
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187 |
if (!g_ascii_isalpha (*p)) |
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188 |
return NULL; |
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189 |
|
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190 |
while (1) |
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191 |
{ |
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192 |
c = *p++; |
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193 |
|
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194 |
if (c == ':') |
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195 |
break; |
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196 |
|
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197 |
if (!(g_ascii_isalnum(c) || |
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198 |
c == '+' || |
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199 |
c == '-' || |
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200 |
c == '.')) |
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201 |
return NULL; |
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202 |
} |
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203 |
|
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204 |
return g_strndup (uri, p - uri - 1); |
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205 |
} |
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206 |
|
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207 |
/** |
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208 |
* g_uri_escape_string: |
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* @unescaped: the unescaped input string. |
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* @reserved_chars_allowed: a string of reserved characters that are |
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* allowed to be used. |
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* @allow_utf8: %TRUE if the result can include UTF-8 characters. |
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* |
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* Escapes a string for use in a URI. |
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* |
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* Normally all characters that are not "unreserved" (i.e. ASCII alphanumerical |
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* characters plus dash, dot, underscore and tilde) are escaped. |
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* But if you specify characters in @reserved_chars_allowed they are not |
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* escaped. This is useful for the "reserved" characters in the URI |
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* specification, since those are allowed unescaped in some portions of |
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* a URI. |
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* |
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* Returns: an escaped version of @unescaped. The returned string should be |
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* freed when no longer needed. |
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* |
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* Since: 2.16 |
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**/ |
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EXPORT_C char * |
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g_uri_escape_string (const char *unescaped, |
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const char *reserved_chars_allowed, |
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gboolean allow_utf8) |
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{ |
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GString *s; |
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|
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g_return_val_if_fail (unescaped != NULL, NULL); |
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|
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s = g_string_sized_new (strlen (unescaped) + 10); |
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|
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g_string_append_uri_escaped (s, unescaped, reserved_chars_allowed, allow_utf8); |
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|
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return g_string_free (s, FALSE); |
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} |
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|
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#define __G_URI_FUNCS_C__ |
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#include "galiasdef.c" |