Kannel: Open Source WAP and SMS gateway  svn-r5336
wsutf8.h
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56 
57 /*
58  *
59  * wsutf8.h
60  *
61  * Author: Markku Rossi <mtr@iki.fi>
62  *
63  * Copyright (c) 1999-2000 WAPIT OY LTD.
64  * All rights reserved.
65  *
66  * Functions to manipulate UTF-8 encoded strings.
67  *
68  * Specification: RFC-2279
69  *
70  */
71 
72 #ifndef WSUTF8_H
73 #define WSUTF8_H
74 
75 /********************* Types and defintions *****************************/
76 
77 /* UTF-8 string handle. */
78 struct WsUtf8StringRec
79 {
80  /* The length of the UTF-8 encoded `data'. */
81  size_t len;
82 
83  /* The UTF-8 encoded data. */
84  unsigned char *data;
85 
86  /* The number of characters in the string. */
87  size_t num_chars;
88 };
89 
90 typedef struct WsUtf8StringRec WsUtf8String;
91 
92 /********************* Global functions *********************************/
93 
94 /* Allocate an empty UTF-8 string. The function returns NULL if the
95  allocation failed (out of memory). */
96 WsUtf8String *ws_utf8_alloc(void);
97 
98 /* Free an UTF-8 encoded string. */
99 void ws_utf8_free(WsUtf8String *string);
100 
101 /* Append the character `ch' to the string `string'. The function
102  returns 1 if the operation was successful or 0 otherwise (out of
103  memory). */
104 int ws_utf8_append_char(WsUtf8String *string, unsigned long ch);
105 
106 /* Verify the UTF-8 encoded string `data' containing `len' bytes of
107  data. The function returns 1 if the `data' is correctly encoded
108  and 0 otherwise. If the argument `strlen_return' is not NULL, it
109  is set to the number of characters in the string. */
110 int ws_utf8_verify(const unsigned char *data, size_t len,
111  size_t *strlen_return);
112 
113 /* Set UTF-8 encoded data `data', `len' to the string `string'. The
114  function returns 1 if the data was UTF-8 encoded and 0 otherwise
115  (malformed data or out of memory). The function frees the possible
116  old data from `string'. */
117 int ws_utf8_set_data(WsUtf8String *string, const unsigned char *data,
118  size_t len);
119 
120 /* Get a character from the UTF-8 string `string'. The argument
121  `posp' gives the index of the character in the UTF-8 encoded data.
122  It is not the sequence number of the character. It is its starting
123  position within the UTF-8 encoded data. The argument `posp' is
124  updated to point to the beginning of the next character within the
125  data. The character is returned in `ch_return'. The function
126  returns 1 if the operation was successful or 0 otherwise (index
127  `posp' was invalid or there were no more characters in the
128  string). */
129 int ws_utf8_get_char(const WsUtf8String *string, unsigned long *ch_return,
130  size_t *posp);
131 
132 /* Convert the UTF-8 encoded string `string' to null-terminated ISO
133  8859/1 (ISO latin1) string. Those characters of `string' which can
134  not be presented in latin1 are replaced with the character
135  `unknown_char'. If the argument `len_return' is not NULL, it is
136  set to contain the length of the returned string (excluding the
137  trailing null-character). The function returns a pointer to the
138  string or NULL if the operation failed (out of memory). The
139  returned string must be freed with the ws_utf8_free_data()
140  function. */
141 unsigned char *ws_utf8_to_latin1(const WsUtf8String *string,
142  unsigned char unknown_char,
143  size_t *len_return);
144 
145 /* Free a string, returned by the ws_utf8_to_latin1_cstr()
146  function. */
147 void ws_utf8_free_data(unsigned char *data);
148 
149 #endif /* not WSUTF8_H */
WsUtf8StringRec::len
size_t len
Definition: wsutf8.h:81
ws_utf8_alloc
WsUtf8String * ws_utf8_alloc(void)
Definition: wsutf8.c:182
WsUtf8StringRec::data
unsigned char * data
Definition: wsutf8.h:84
ws_utf8_get_char
int ws_utf8_get_char(const WsUtf8String *string, unsigned long *ch_return, size_t *posp)
Definition: wsutf8.c:293
ws_utf8_free
void ws_utf8_free(WsUtf8String *string)
Definition: wsutf8.c:188
ws_utf8_free_data
void ws_utf8_free_data(unsigned char *data)
Definition: wsutf8.c:368
ws_utf8_to_latin1
unsigned char * ws_utf8_to_latin1(const WsUtf8String *string, unsigned char unknown_char, size_t *len_return)
Definition: wsutf8.c:332
ws_utf8_set_data
int ws_utf8_set_data(WsUtf8String *string, const unsigned char *data, size_t len)
Definition: wsutf8.c:266
ws_utf8_verify
int ws_utf8_verify(const unsigned char *data, size_t len, size_t *strlen_return)
Definition: wsutf8.c:233
ws_utf8_append_char
int ws_utf8_append_char(WsUtf8String *string, unsigned long ch)
Definition: wsutf8.c:198
WsUtf8StringRec::num_chars
size_t num_chars
Definition: wsutf8.h:87
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