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QoreEncoding.h
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1 /* -*- mode: c++; indent-tabs-mode: nil -*- */
2 /*
3 QoreEncoding.h
4
5 Qore Programming Language
6
7 Copyright 2003 - 2013 David Nichols
8
9 This library is free software; you can redistribute it and/or
10 modify it under the terms of the GNU Lesser General Public
11 License as published by the Free Software Foundation; either
12 version 2.1 of the License, or (at your option) any later version.
13
14 This library is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 Lesser General Public License for more details.
18
19 You should have received a copy of the GNU Lesser General Public
20 License along with this library; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24 #ifndef _QORE_CHARSET_H
25
26 #define _QORE_CHARSET_H
27
33 #include <qore/common.h>
34 #include <qore/QoreThreadLock.h>
35
36 #include <strings.h>
37 #include <string.h>
38
39 #include <map>
40
41 #include <string>
42
44 typedef qore_size_t (*mbcs_length_t)(const char *str, const char *end, bool &invalid);
45
47 typedef qore_size_t (*mbcs_end_t)(const char *str, const char *end, qore_size_t num_chars, bool &invalid);
48
50 typedef qore_size_t (*mbcs_pos_t)(const char *str, const char *ptr, bool &invalid);
51
53
57 typedef qore_size_t (*mbcs_charlen_t)(const char *str, qore_size_t valid_len);
58
59 class ExceptionSink;
60
62
72 class QoreEncoding {
73 private:
74 std::string code;
75 std::string desc;
76 mbcs_length_t flength;
77 mbcs_end_t fend;
78 mbcs_pos_t fpos;
79 mbcs_charlen_t fcharlen;
80 unsigned char maxwidth;
81
82 public:
83 DLLLOCAL QoreEncoding(const char *n_code, const char *n_desc = 0, unsigned char n_maxwidth = 1, mbcs_length_t l = 0, mbcs_end_t e = 0, mbcs_pos_t p = 0, mbcs_charlen_t c = 0) : code(n_code), desc(n_desc ? n_desc : ""), flength(l), fend(e), fpos(p), fcharlen(c), maxwidth(n_maxwidth) {
84 }
85
86 DLLLOCAL ~QoreEncoding() {
87 }
88
90
95 DLLLOCAL qore_size_t getLength(const char *p, const char *end, bool &invalid) const {
96 return flength ? flength(p, end, invalid) : strlen(p);
97 }
98
100
105 DLLLOCAL qore_size_t getLength(const char *p, const char *end, ExceptionSink *xsink) const;
106
108
114 DLLLOCAL qore_size_t getByteLen(const char *p, const char *end, qore_size_t c, bool &invalid) const {
115 return fend ? fend(p, end, c, invalid) : c;
116 }
117
119
125 DLLLOCAL qore_size_t getByteLen(const char *p, const char *end, qore_size_t c, ExceptionSink *xsink) const;
126
128
133 DLLLOCAL qore_size_t getCharPos(const char *p, const char *end, bool &invalid) const {
134 return fpos ? fpos(p, end, invalid) : end - p;
135 }
136
138
143 DLLLOCAL qore_size_t getCharPos(const char *p, const char *end, ExceptionSink *xsink) const;
144
146
151 DLLLOCAL qore_size_t getCharLen(const char *p, qore_size_t valid_len) const {
152 return fcharlen ? fcharlen(p, valid_len) : 1;
153 }
154
156 DLLLOCAL bool isMultiByte() const {
157 return (bool)flength;
158 }
159
161 DLLLOCAL const char *getCode() const {
162 return code.c_str();
163 }
164
166 DLLLOCAL const char *getDesc() const {
167 return desc.empty() ? "<no description available>" : desc.c_str();
168 }
169
171 DLLLOCAL int getMaxCharWidth() const {
172 return maxwidth;
173 }
174 };
175
176 // case-insensitive maps for encodings
177 typedef std::map<const char *, QoreEncoding *, class ltcstrcase> encoding_map_t;
178 typedef std::map<const char *, const QoreEncoding *, class ltcstrcase> const_encoding_map_t;
179
180 class QoreString;
181
183
185 class QoreEncodingManager {
186 private:
187 DLLLOCAL static encoding_map_t emap;
188 DLLLOCAL static const_encoding_map_t amap;
189 DLLLOCAL static class QoreThreadLock mutex;
190
191 DLLLOCAL static const QoreEncoding *addUnlocked(const char *code, const char *desc, unsigned char maxwidth = 1, mbcs_length_t l = 0, mbcs_end_t e = 0, mbcs_pos_t p = 0, mbcs_charlen_t = 0);
192 DLLLOCAL static const QoreEncoding *findUnlocked(const char *name);
193
194 public:
196 DLLEXPORT static void addAlias(const QoreEncoding *qcs, const char *alias);
197
199 DLLEXPORT static const QoreEncoding *findCreate(const char *name);
200
202 DLLEXPORT static const QoreEncoding *findCreate(const QoreString *str);
203
205 DLLEXPORT static void showEncodings();
206
208 DLLEXPORT static void showAliases();
209
211 DLLEXPORT static const QoreEncoding *add(const char *code, const char *desc = 0, unsigned char maxwidth = 1, mbcs_length_t l = 0, mbcs_end_t e = 0, mbcs_pos_t p = 0, mbcs_charlen_t = 0);
212
213 DLLLOCAL static void init(const char *def);
214 DLLLOCAL QoreEncodingManager();
215 DLLLOCAL ~QoreEncodingManager();
216 };
217
218 DLLEXPORT qore_size_t q_get_byte_len(const QoreEncoding* enc, const char *p, const char *end, qore_size_t c, ExceptionSink *xsink);
219 DLLEXPORT qore_size_t q_get_char_len(const QoreEncoding* enc, const char *p, qore_size_t valid_len, ExceptionSink* xsink);
220
222 DLLEXPORT extern QoreEncodingManager QEM;
223
224 // builtin character encodings
225 DLLEXPORT extern const QoreEncoding *QCS_DEFAULT,
226 *QCS_USASCII,
227 *QCS_UTF8,
228 *QCS_ISO_8859_1,
229 *QCS_ISO_8859_2,
230 *QCS_ISO_8859_3,
231 *QCS_ISO_8859_4,
232 *QCS_ISO_8859_5,
233 *QCS_ISO_8859_6,
234 *QCS_ISO_8859_7,
235 *QCS_ISO_8859_8,
236 *QCS_ISO_8859_9,
237 *QCS_ISO_8859_10,
238 *QCS_ISO_8859_11,
239 *QCS_ISO_8859_13,
240 *QCS_ISO_8859_14,
241 *QCS_ISO_8859_15,
242 *QCS_ISO_8859_16,
243 *QCS_KOI8_R,
244 *QCS_KOI8_U,
245 *QCS_KOI7;
246
247 #endif // _QORE_CHARSET_H
QoreEncoding::getDesc
DLLLOCAL const char * getDesc() const
returns the description for the encoding
Definition: QoreEncoding.h:166
QCS_UTF8
DLLEXPORT const QoreEncoding * QCS_UTF8
UTF-8 multi-byte encoding (the only multi-byte encoding, all others are single-byte encodings) ...
QoreEncoding::getMaxCharWidth
DLLLOCAL int getMaxCharWidth() const
returns the maximum character width in bytes for the encoding
Definition: QoreEncoding.h:171
QoreEncoding
defines string encoding functions in Qore
Definition: QoreEncoding.h:72
QCS_ISO_8859_8
DLLEXPORT const QoreEncoding * QCS_ISO_8859_8
Hebrew character set.
QCS_ISO_8859_1
DLLEXPORT const QoreEncoding * QCS_ISO_8859_1
latin-1, Western European encoding
QCS_DEFAULT
DLLEXPORT const QoreEncoding * QCS_DEFAULT
the default encoding for the Qore library
QoreEncoding::getLength
DLLLOCAL qore_size_t getLength(const char *p, const char *end, bool &invalid) const
gives the length of the string in characters
Definition: QoreEncoding.h:95
QoreEncodingManager::addAlias
static DLLEXPORT void addAlias(const QoreEncoding *qcs, const char *alias)
adds an alias for an encoding
QCS_ISO_8859_2
DLLEXPORT const QoreEncoding * QCS_ISO_8859_2
latin-2, Central European encoding
QCS_ISO_8859_11
DLLEXPORT const QoreEncoding * QCS_ISO_8859_11
Thai character set.
QoreEncodingManager
manages encodings in Qore
Definition: QoreEncoding.h:185
QCS_ISO_8859_3
DLLEXPORT const QoreEncoding * QCS_ISO_8859_3
latin-3, Southern European character set
qore_size_t
size_t qore_size_t
used for sizes (same range as a pointer)
Definition: common.h:61
mbcs_charlen_t
qore_size_t(* mbcs_charlen_t)(const char *str, qore_size_t valid_len)
for multi-byte encodings: gives the number of total bytes for the character given one or more charact...
Definition: QoreEncoding.h:57
QCS_ISO_8859_4
DLLEXPORT const QoreEncoding * QCS_ISO_8859_4
latin-4, Northern European character set
QoreEncodingManager::showEncodings
static DLLEXPORT void showEncodings()
prints out all valid encodings to stdout
QCS_USASCII
DLLEXPORT const QoreEncoding * QCS_USASCII
ascii encoding
QoreEncoding::getCode
DLLLOCAL const char * getCode() const
returns the string code (ex: &quot;UTF-8&quot;) for the encoding
Definition: QoreEncoding.h:161
QoreEncoding::getByteLen
DLLLOCAL qore_size_t getByteLen(const char *p, const char *end, qore_size_t c, bool &invalid) const
gives the number of bytes for the number of chars in the string or up to the end of the string ...
Definition: QoreEncoding.h:114
QCS_ISO_8859_10
DLLEXPORT const QoreEncoding * QCS_ISO_8859_10
latin-6, Nordic character set
QoreString
Qore&#39;s string type supported by the QoreEncoding class.
Definition: QoreString.h:42
QCS_KOI8_U
DLLEXPORT const QoreEncoding * QCS_KOI8_U
Ukrainian: Kod Obmena Informatsiey, 8 bit.
mbcs_length_t
qore_size_t(* mbcs_length_t)(const char *str, const char *end, bool &invalid)
for multi-byte character set encodings: gives the length of the string in characters ...
Definition: QoreEncoding.h:44
QEM
DLLEXPORT QoreEncodingManager QEM
the QoreEncodingManager object
mbcs_end_t
qore_size_t(* mbcs_end_t)(const char *str, const char *end, qore_size_t num_chars, bool &invalid)
for multi-byte character set encodings: gives the number of bytes for the number of chars ...
Definition: QoreEncoding.h:47
QCS_ISO_8859_9
DLLEXPORT const QoreEncoding * QCS_ISO_8859_9
latin-5, Turkish character set
QoreEncodingManager::showAliases
static DLLEXPORT void showAliases()
prints out all aliases to stdout
QoreEncodingManager::findCreate
static DLLEXPORT const QoreEncoding * findCreate(const char *name)
finds an encoding if it exists (also looks up against alias names) and creates a new one if it doesn&#39;...
QCS_KOI7
DLLEXPORT const QoreEncoding * QCS_KOI7
Russian: Kod Obmena Informatsiey, 7 bit characters.
mbcs_pos_t
qore_size_t(* mbcs_pos_t)(const char *str, const char *ptr, bool &invalid)
for multi-byte character set encodings: gives the character position of the ptr
Definition: QoreEncoding.h:50
ExceptionSink
container for holding Qore-language exception information and also for registering a &quot;thread_exit&quot; ca...
Definition: ExceptionSink.h:35
QCS_ISO_8859_14
DLLEXPORT const QoreEncoding * QCS_ISO_8859_14
latin-8, Celtic character set
QoreEncoding::getCharPos
DLLLOCAL qore_size_t getCharPos(const char *p, const char *end, bool &invalid) const
gives the character position (number of characters) starting from the first pointer to the second ...
Definition: QoreEncoding.h:133
QCS_ISO_8859_6
DLLEXPORT const QoreEncoding * QCS_ISO_8859_6
Arabic character set.
QoreEncoding::isMultiByte
DLLLOCAL bool isMultiByte() const
returns true if the encoding is a multi-byte encoding
Definition: QoreEncoding.h:156
QCS_ISO_8859_5
DLLEXPORT const QoreEncoding * QCS_ISO_8859_5
Cyrillic character set.
common.h
QoreThreadLock
provides a mutually-exclusive thread lock
Definition: QoreThreadLock.h:41
QoreEncoding::getCharLen
DLLLOCAL qore_size_t getCharLen(const char *p, qore_size_t valid_len) const
gives the number of total bytes for the character given one or more characters
Definition: QoreEncoding.h:151
QoreEncodingManager::add
static DLLEXPORT const QoreEncoding * add(const char *code, const char *desc=0, unsigned char maxwidth=1, mbcs_length_t l=0, mbcs_end_t e=0, mbcs_pos_t p=0, mbcs_charlen_t=0)
adds a new encoding to the list
QCS_ISO_8859_16
DLLEXPORT const QoreEncoding * QCS_ISO_8859_16
latin-10, Southeast European character set
QCS_ISO_8859_15
DLLEXPORT const QoreEncoding * QCS_ISO_8859_15
latin-9, Western European with euro symbol
QCS_KOI8_R
DLLEXPORT const QoreEncoding * QCS_KOI8_R
Russian: Kod Obmena Informatsiey, 8 bit.
QCS_ISO_8859_7
DLLEXPORT const QoreEncoding * QCS_ISO_8859_7
Greek character set.
QCS_ISO_8859_13
DLLEXPORT const QoreEncoding * QCS_ISO_8859_13
latin-7, Baltic rim character set