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#ifndef unicode_h
#define unicode_h
/*
** Copyright 2000-2011 Double Precision, Inc.
** See COPYING for distribution information.
**
*/
#ifdef __cplusplus
#include <string>
#include <vector>
#include <list>
extern "C" {
#endif
#if 0
}
#endif
#include "../unicode/unicode_config.h" /* VPATH build */
#include <stdlib.h>
#include <stdio.h>
#if HAVE_WCHAR_H
#include <wchar.h>
#endif
#if HAVE_STDDEF_H
#include <stddef.h>
#endif
#include <stdint.h>
#include <sys/types.h>
typedef uint32_t unicode_char;
/*
** The system default character set, from the locale.
*/
extern const char *unicode_default_chset();
/* Unicode upper/lower/title case conversion functions */
extern unicode_char unicode_uc(unicode_char);
extern unicode_char unicode_lc(unicode_char);
extern unicode_char unicode_tc(unicode_char);
/*
** Look up HTML 4.0/XHTML entity.
**
** n="amp", etc...
**
** Returns the unicode entity value, or 0 if no such entity is defined.
*/
unicode_char unicode_html40ent_lookup(const char *n);
/*
**
** Return "width" of unicode character.
**
** This is defined as follows: for characters having the F or W property in
** tr11 (EastAsianWidth), unicode_wcwidth() returns 2.
**
** Otherwise, characters having the BK, CR, LF, CM, NL, WJ, and ZW line
** breaking property as per tr14, unicode_wcwdith() returns 0. For all other
** cases, 1.
**
** This provides a rough estimate of the "width" of the character if its
** shown on a text console.
*/
extern int unicode_wcwidth(unicode_char c);
extern size_t unicode_wcwidth_str(const unicode_char *c);
/*
** The unicode-ish isspace()
*/
extern int unicode_isspace(unicode_char ch);
/* Internal unicode table lookup function */
extern uint8_t unicode_tab_lookup(unicode_char ch,
const size_t *unicode_indextab,
size_t unicode_indextab_sizeof,
const uint8_t (*unicode_rangetab)[2],
const uint8_t *unicode_classtab,
uint8_t uclass);
/*
** Implementation of grapheme cluster boundary rules, as per tr29,
** including GB9a and GB9b.
**
** Returns non-zero if there's a grapheme break between the two referenced
** characters.
*/
int unicode_grapheme_break(unicode_char a, unicode_char b);
/*
** Implementation of line break rules, as per tr14.
**
** Invoke unicode_lb_init() to initialize the linebreaking algorithm. The
** first parameter is a callback function that gets invoked with two
** arguments: UNICODE_LB_{MANDATORY|NONE|ALLOWED}, and a passthrough argument.
** The second parameter to unicode_lb_init() is the opaque passthrough
** pointer, that is passed as the second argument to the callback function
** with no further interpretation.
**
** unicode_lb_init() returns an opaque handle. Invoke unicode_lb_next(),
** passing the handle and one unicode character. Repeatedly invoke
** unicode_lb_next() to specify the input string for the linebreaking
** algorithm, then invoke unicode_lb_end() to finish calculating the
** linebreaking algorithm, and deallocate the opaque linebreaking handle.
**
** The callback function gets invoked once for each invocation of
** unicode_lb_next(). The contract is that before unicode_lb_end() returns,
** the callback function will get invoked the exact number of times that
** unicode_lb_next(), as long as each invocation of the callback function
** returned 0; nothing more, nothing less. The first parameter to the callback
** function will be one of the following values:
**
** UNICODE_LB_MANDATORY - a linebreak is MANDATORY before the corresponding
** character.
** UNICODE_LB_NONE - a linebreak is PROHIBITED before the corresponding
** character.
** UNICODE_LB_ALLOWED - a linebreak is OPTIONAL before the corresponding
** character (the preceding character is a space, or an equivalent).
**
** The callback function should return 0. A non-zero value indicates an
** error, which gets propagated up to the caller. The contract that the
** callback function gets invoked the same number of times that
** unicode_lb_next() gets invoked is now broken.
*/
#define UNICODE_LB_MANDATORY -1
#define UNICODE_LB_NONE 0
#define UNICODE_LB_ALLOWED 1
struct unicode_lb_info;
typedef struct unicode_lb_info *unicode_lb_info_t;
/*
** Allocate a linebreaking handle.
*/
extern unicode_lb_info_t unicode_lb_init(int (*cb_func)(int, void *),
void *cb_arg);
/*
** Feed the next character through the linebreaking algorithm.
** A non-zero return code indicates that the callback function was invoked
** and it returned a non-zero return code (which is propagated as a return
** value). unicode_lb_end() must still be invoked, in this case.
**
** A zero return code indicates that if the callback function was invoked,
** it returned 0.
*/
extern int unicode_lb_next(unicode_lb_info_t i, unicode_char ch);
/*
** Convenience function that invokes unicode_lb_next() with a list of
** unicode chars. Returns 0 if all invocations of unicode_lb_next() returned
** 0, or the first non-zero return value from unicode_lb_next().
*/
extern int unicode_lb_next_cnt(unicode_lb_info_t i,
const unicode_char *chars,
size_t cnt);
/*
** Finish the linebreaking algorithm.
**
** A non-zero return code indicates that the callback function was invoked
** and it returned a non-zero return code (which is propagated as a return
** value).
**
** A zero return code indicates that if the callback function was invoked,
** it returned 0, and that the callback function was invoked exactly the same
** number of times that unicode_lb_next() was invoked.
**
** In all case, the linebreak handle will no longer be valid when this
** function returns.
*/
extern int unicode_lb_end(unicode_lb_info_t i);
/*
** An alternative linebreak API where the callback function receives the
** original unicode character in addition to its linebreak value.
**
** User unicode_lbc_init(), unicode_lbc_next(), and unicode_lbc_end(), whose
** semantics are the same as their _lb_ counterparts.
*/
struct unicode_lbc_info;
typedef struct unicode_lbc_info *unicode_lbc_info_t;
extern unicode_lbc_info_t unicode_lbc_init(int (*cb_func)(int, unicode_char,
void *),
void *cb_arg);
extern int unicode_lbc_next(unicode_lbc_info_t i, unicode_char ch);
extern int unicode_lbc_end(unicode_lbc_info_t i);
/*
** Set linebreaking options.
**
** OPTIONS SUBJECT TO CHANGE.
*/
extern void unicode_lb_set_opts(unicode_lb_info_t i, int opts);
extern void unicode_lbc_set_opts(unicode_lbc_info_t i, int opts);
/*
** Tailorization of LB24: Prevent pluses, as in "C++", from breaking.
**
** Adds the following to LB24:
**
** PR x PR
**
** AL x PR
**
** ID x PR
**/
#define UNICODE_LB_OPT_PRBREAK 0x0001
/*
** Tailored / breaking rules.
**
** Adds the following rule to LB13:
**
** SY x EX
**
** SY x AL
**
** SY x ID
**
** SP รท SY, which takes precedence over "x SY".
*/
#define UNICODE_LB_OPT_SYBREAK 0x0002
/*
** Implemention of word break rules, as per tr29.
**
** Invoke unicode_wb_init() to initialize the wordbreaking algorithm. The
** first parameter is a callback function that gets invoked with two
** arguments: an int flag, and a passthrough argument. The second parameter to
** unicode_wb_init() is the opaque passthrough pointer, that is passed as the
** second argument to the callback function with no further interpretation.
**
** unicode_wb_init() returns an opaque handle. Invoke unicode_wb_next(),
** passing the handle and one unicode character. Repeatedly invoke
** unicode_wb_next() to specify the input string for the wordbreaking
** algorithm, then invoke unicode_wb_end() to finish calculating the
** wordbreaking algorithm, and deallocate the opaque wordbreaking handle.
**
** The callback function gets invoked once for each invocation of
** unicode_wb_next(). The contract is that before unicode_wb_end() returns,
** the callback function will get invoked the exact number of times that
** unicode_wb_next(), as long as each invocation of the callback function
** returned 0; nothing more, nothing less. The first parameter to the callback
** function will be an int. A non-zero value indicates that there is a word
** break between this character and the preceding one.
**
** The callback function should return 0. A non-zero value indicates an
** error, which gets propagated up to the caller. The contract that the
** callback function gets invoked the same number of times that
** unicode_lb_next() gets invoked is now broken.
*/
struct unicode_wb_info;
typedef struct unicode_wb_info *unicode_wb_info_t;
/*
** Allocate a wordbreaking handle.
*/
extern unicode_wb_info_t unicode_wb_init(int (*cb_func)(int, void *),
void *cb_arg);
/*
** Feed the next character through the wordbreaking algorithm.
** A non-zero return code indicates that the callback function was invoked
** and it returned a non-zero return code (which is propagated as a return
** value). unicode_wb_end() must still be invoked, in this case.
**
** A zero return code indicates that if the callback function was invoked,
** it returned 0.
*/
extern int unicode_wb_next(unicode_wb_info_t i, unicode_char ch);
/*
** Convenience function that invokes unicode_wb_next() with a list of
** unicode chars. Returns 0 if all invocations of unicode_wb_next() returned
** 0, or the first non-zero return value from unicode_wb_next().
*/
extern int unicode_wb_next_cnt(unicode_wb_info_t i,
const unicode_char *chars,
size_t cnt);
/*
** Finish the wordbreaking algorithm.
**
** A non-zero return code indicates that the callback function was invoked
** and it returned a non-zero return code (which is propagated as a return
** value).
**
** A zero return code indicates that if the callback function was invoked,
** it returned 0, and that the callback function was invoked exactly the same
** number of times that unicode_wb_next() was invoked.
**
** In all case, the wordbreak handle will no longer be valid when this
** function returns.
*/
extern int unicode_wb_end(unicode_wb_info_t i);
/*
** Search for a word boundary.
**
** Obtain a handle by calling unicode_wbscan_init(), then invoke
** unicode_wbscan_next() to provide a unicode stream, then invoke
** unicode_wbscan_end(). unicode_wbscan_end() returns the number of unicode
** characters from the beginning of the stream until the first word boundary.
**
** You may prematurely stop calling unicode_wbscan_next() once it returns a
** non-0 value, which means that there is sufficient context to compute the
** first word boundary, and all further calls to unicode_wbscan_next() will
** be internal no-ops.
*/
struct unicode_wbscan_info;
typedef struct unicode_wbscan_info *unicode_wbscan_info_t;
unicode_wbscan_info_t unicode_wbscan_init();
int unicode_wbscan_next(unicode_wbscan_info_t i, unicode_char ch);
size_t unicode_wbscan_end(unicode_wbscan_info_t i);
/*
** A buffer that holds unicode characters, and dynamically grows as needed.
*/
struct unicode_buf {
unicode_char *ptr; /* The unicode characters */
size_t size, /* Buffer size */
len, /* How many characters in ptr are initialized */
max; /* Maximum size the buffer can grow to */
};
/*
** Initialize a buffer. Constructor.
*/
void unicode_buf_init(/* Initialize this structure. ptr, size, len cleared */
struct unicode_buf *p,
/*
** Maximum size the buffer can grow to. (size_t)-1
** means unlimited.
*/
size_t max);
/*
** Like unicode_buf_init, and initialize the new buffer with the contents of
** another buffer. The maximum size of the initialized buffer is exactly the
** number of characters in the existing buffer. This copies a buffer using
** the minimum amount of heap space.
*/
#define unicode_buf_init_copy(a,b) \
do { \
unicode_buf_init((a), unicode_buf_len(b)); \
unicode_buf_append_buf((a),(b)); \
} while (0)
/*
** Deinitialize the buffer. Destructor. Frees memory.
*/
void unicode_buf_deinit(struct unicode_buf *p);
/*
** Official way to access the characters in the unicode buffer.
*/
#define unicode_buf_ptr(p) ((p)->ptr)
/*
** Official way of obtaining the number of characters in the unicode buffer.
*/
#define unicode_buf_len(p) ((p)->len)
/*
** Remove all existing characters from an initialized buffer. Sets len to 0.
*/
#define unicode_buf_clear(p) ((p)->len=0)
/*
** Append characters to the existing characters in the unicode buffer.
** The buffer grows, if needed. If the buffer would exceed its maximum size,
** the extra characters get truncated.
**
** Returns 0 if the characters were appended. -1 for a malloc failure.
*/
int unicode_buf_append(struct unicode_buf *p, /* The buffer */
const unicode_char *uc, /* Characters to append */
size_t l); /* How many of them */
/*
** Convert an iso-8859-1 char string and invoke unicode_buf_append().
*/
void unicode_buf_append_char(struct unicode_buf *dst,
const char *str,
size_t cnt);
/*
** Remove some portion of the unicode buffer
*/
void unicode_buf_remove(struct unicode_buf *p, /* The buffer */
size_t pos, /* Offset in buffer */
size_t cnt); /* How many to remove */
/*
** Append the contents of an existing buffer to another one.
*/
#define unicode_buf_append_buf(a,b) \
unicode_buf_append((a), unicode_buf_ptr(b), unicode_buf_len(b))
/*
** The equivalent of strcmp() for unicode buffers.
*/
int unicode_buf_cmp(const struct unicode_buf *a,
const struct unicode_buf *b);
/*
** The equivalent of unicode_buf_cmp, except that the second buffer is an
** iso-8859-1 string.
*/
int unicode_buf_cmp_str(const struct unicode_buf *p,
const char *c, /* iso-8859-1 string */
size_t cl); /* Number of chars in c */
/*
** A wrapper for iconv(3). This wrapper provides a different API for iconv(3).
** A handle gets created by libmail_u_convert_init().
** libmail_u_convert_init() receives a pointer to the output function
** which receives converted character text.
**
** The output function receives a pointer to the converted character text, and
** the number of characters in the converted text.
**
** The character text to convert gets passed, repeatedly, to
** libmail_u_convert(). Each call to libmail_u_convert() results in
** the output function being invoked, zero or more times, with the converted
** text. Finally, libmail_u_convert_deinit() stops the conversion and
** deallocates the conversion handle.
**
** Internal buffering takes place. libmail_u_convert_deinit() may result
** in the output function being called one or more times, to receive the final
** part of the converted character stream.
**
** The output function should return 0. A non-0 value causes
** libmail_u_convert() and/or libmail_u_convert_deinit() returning
** non-0.
*/
struct libmail_u_convert_hdr;
typedef struct libmail_u_convert_hdr *libmail_u_convert_handle_t;
/*
** libmail_u_convert_init() returns a non-NULL handle for the requested
** conversion, or NULL if the requested conversion is not available.
*/
libmail_u_convert_handle_t
libmail_u_convert_init(/* Convert from this chset */
const char *src_chset,
/* Convert to this chset */
const char *dst_chset,
/* The output function */
int (*output_func)(const char *, size_t, void *),
/* Passthrough arg */
void *convert_arg);
/*
** Repeatedly pass the character text to convert to libmail_u_convert().
**
** Returns non-0 if the output function returned non-0, or 0 if all invocations
** of the output function returned 0.
*/
int libmail_u_convert(/* The conversion handle */
libmail_u_convert_handle_t handle,
/* Text to convert */
const char *text,
/* Number of bytes to convert */
size_t cnt);
/*
** Finish character set conversion. The handle gets deallocated.
**
** May still result in one or more invocations of the output function.
** Returns non-zero if any previous invocation of the output function returned
** non-zero (this includes any invocations of the output function resulting
** from this call, or prior libmail_u_convert() calls), or 0 if all
** invocations of the output function returned 0.
**
** If the errptr is not NULL, *errptr is set to non-zero if there were any
** conversion errors -- if there was any text that could not be converted to
** the destination character text.
*/
int libmail_u_convert_deinit(libmail_u_convert_handle_t handle,
int *errptr);
/*
** Specialization: save converted character text in a buffer.
**
** Implementation: call libmail_u_convert_tocbuf_init() instead of
** libmail_u_convert_init(), then call libmail_u_convert() and
** libmail_u_convert_deinit(), as usual.
**
** If libmail_u_convert_deinit() returns 0, *cbufptr_ret gets initialized to a
** malloc()ed buffer, and the number of converted characters, the size of the
** malloc()ed buffer, are placed into *csize_ret arguments, that were passed
** to libmail_u_convert_tou_init().
**
** Note: if the converted string is an empty string, *cbufsize_ret is set to 0,
** but *cbufptr_ptr still gets initialized (to a dummy malloced buffer).
**
** The optional nullterminate places a trailing \0 character after the
** converted string (this is included in *cbufsize_ret).
*/
libmail_u_convert_handle_t
libmail_u_convert_tocbuf_init(/* Convert from this chset */
const char *src_chset,
/* Convert to this chset */
const char *dst_chset,
/* malloced buffer */
char **cbufptr_ret,
/* size of the malloced buffer */
size_t *cbufsize_ret,
/* null terminate the resulting string */
int nullterminate
);
/*
** Specialization: convert some character text to a unicode_char array.
**
** This is like libmail_u_convert_tocbuf_init(), but converts to a unicode_char
** array.
**
** The returned *ucsize_ret is initialized with the number of unicode_chars,
** rather than the byte count.
**
** In all other ways, this function behaves identically to
** libmail_u_convert_tocbuf_init().
*/
libmail_u_convert_handle_t
libmail_u_convert_tou_init(/* Convert from this chset */
const char *src_chset,
/* malloc()ed buffer pointer, on exit. */
unicode_char **ucptr_ret,
/* size of the malloc()ed buffer, upon exit */
size_t *ucsize_ret,
/* If true, terminate with U+0x0000, for convenience */
int nullterminate
);
/*
** Specialization: convert a unicode_char array to some character text.
**
** This is the opposite of libmail_u_convert_tou_init(). Call this to
** initialize the conversion handle, then use libmail_u_convert_uc()
** instead of libmail_u_convert.
*/
libmail_u_convert_handle_t
libmail_u_convert_fromu_init(/* Convert to this chset */
const char *dst_chset,
/* malloc()ed buffer pointer, on exit. */
char **cbufptr_ret,
/* size of the malloc()ed buffer, upon exit */
size_t *cbufsize_ret,
/* If true, terminate with U+0x0000, for convenience */
int nullterminate
);
int libmail_u_convert_uc(/* The conversion handle */
libmail_u_convert_handle_t handle,
/* Text to convert */
const unicode_char *text,
/* Number of bytes to convert */
size_t cnt);
/*
** Initialize conversion to UTF-8.
**
** This is a wrapper for libmail_u_convert_tocbuf_init() that specifies the
** destination charset as UTF-8.
*/
libmail_u_convert_handle_t
libmail_u_convert_tocbuf_toutf8_init(const char *src_chset,
char **cbufptr_ret,
size_t *cbufsize_ret,
int nullterminate);
/*
** Initialize conversion from UTF-8.
**
** This is a wrapper for libmail_u_convert_tocbuf_init() that specifies the
** source charset as UTF-8.
*/
libmail_u_convert_handle_t
libmail_u_convert_tocbuf_fromutf8_init(const char *dst_chset,
char **cbufptr_ret,
size_t *cbufsize_ret,
int nullterminate);
/*
** Convert a character string to UTF-8.
**
** Returns a malloc-ed buffer holding the UTF-8 string, or NULL if an
** error occured.
*/
char *libmail_u_convert_toutf8(/* Text to convert to UTF-8 */
const char *text,
/* Character set to convert to UTF-8 */
const char *charset,
/*
** If non-NULL, and a non-NULL pointer is
** returned, *error is set to non-zero if
** a character conversion error has occured.
*/
int *error);
/*
** Convert UTF-8 text to another character set.
**
** Returns a malloc-ed buffer holding the string converted to the specified
** character set, or NULL if an error occured.
*/
char *libmail_u_convert_fromutf8(/* A UTF-8 string */
const char *text,
/*
** Convert the UTF-8 string to this character
** set.
*/
const char *charset,
/*
** If non-NULL, and a non-NULL pointer is
** returned, *error is set to non-zero if
** a character conversion error has occured.
*/
int *error);
/*
** Convert one charset to another charset, placing the result in a malloc-ed
** buffer.
**
** Returns a malloc-ed buffer holding the string converted to the specified
** character set, or NULL if an error occured.
*/
char *libmail_u_convert_tobuf(/* A string to convert */
const char *text,
/*
** String's charset.
*/
const char *charset,
/*
** Destination charset
*/
const char *dstcharset,
/*
** If non-NULL, and a non-NULL pointer is
** returned, *error is set to non-zero if
** a character conversion error has occured.
*/
int *error);
/*
** Convenience function: call libmail_u_convert_tou_init(), feed the
** character string through libmail_u_convert(), then call
** libmail_u_convert_deinit().
**
** If this function returns 0, *uc and *ucsize is set to a malloced buffer+size
** holding the unicode char array.
*/
int libmail_u_convert_tou_tobuf(/* Character text to convert */
const char *text,
/* Number of characters */
size_t text_l,
/* text's charset */
const char *charset,
/*
** If this function returns 0, this gets
** initialized
*/
unicode_char **uc,
/*
** Size of the allocated buffer
*/
size_t *ucsize,
/*
** If not null and this function returns 0,
** this is set to non-0 if there
** was a conversion error (but the output
** buffer gets still allocated and
** initialized)
*/
int *err);
/*
** Convenience function: call libmail_u_convert_fromu_init(), feed the
** unicode_array through libmail_u_convert_uc(), then call
** libmail_u_convert_deinit().
**
** If this function returns 0, *uc and *ucsize is set to a malloced buffer+size
** holding the converted character string
*/
int libmail_u_convert_fromu_tobuf(/* Unicode array to convert to a char str */
const unicode_char *utext,
/*
** Size of the unicode array.
** If this is (size_t)-1, utext is a
** 0-terminated array.
*/
size_t utext_l,
/*
** Convert the unicode array to this charset.
*/
const char *charset,
/*
** If libmail_u_convert_fromu_tobuf()
** returns 0, this is initialized to a
** malloced buffer with a 0-terminated
** string is kept.
*/
char **c,
/*
** Size of the initialized array, including
** the 0-terminator.
*/
size_t *csize,
/*
** If libmail_u_convert_fromu_tobuf()
** returns 0 and this is not NULL,
** *err is set to non-0 if there was a
** conversion error to the requested
** character set.
*/
int *err);
/*
** Convenience function: convert a string in a given character set
** to/from uppercase, lowercase, or something else.
**
** This is done by calling libmail_u_convert_tou_tobuf() first,
** applying the title_func and char_func, then using
** libmail_u_convert_fromu_tobuf().
**
** A NULL return indicates that the requested conversion cannot be performed.
*/
char *libmail_u_convert_tocase( /* String to convert */
const char *str,
/* String's character set */
const char *charset,
/*
** Conversion of the first character in
** str: unicode_uc, unicode_lc, or unicode_tc:
*/
unicode_char (*first_char_func)(unicode_char),
/*
** Conversion of the second and the remaining
** character in str. If NULL, same as
** first_char_func.
*/
unicode_char (*char_func)(unicode_char));
/* Either UCS-4BE or UCS-4LE, matching the native unicode_char endianness */
extern const char libmail_u_ucs4_native[];
/* Either UCS-2BE or UCS-2LE, matching the native unicode_char endianness */
extern const char libmail_u_ucs2_native[];
/*
** Modified-UTF7 encoding used for IMAP folder names. Pass it for a charset
** parameter.
**
** This can be followed by a " " and up to 15 characters to be escaped in
** addition to unicode chars.
*/
#define unicode_x_imap_modutf7 "x-imap-modutf7"
#if 0
{
#endif
#ifdef __cplusplus
}
extern size_t unicode_wcwidth(const std::vector<unicode_char> &uc);
namespace mail {
/*
** Interface to iconv.
**
** Subclass converted(). Invoke begin(), then operator(), repeatedly,
** then end().
**
** converted() receives the converted text.
*/
class iconvert {
libmail_u_convert_handle_t handle;
public:
iconvert();
~iconvert();
/* Start conversion.
** Returns false if the requested conversion cannot be done.
**/
bool begin(/* Convert from */
const std::string &src_chset,
/* Convert to */
const std::string &dst_chset);
/* Feed iconv(3). Returns false if the conversion was aborted.
*/
bool operator()(const char *, size_t);
bool operator()(const unicode_char *, size_t);
/*
** Get the results here. If the subclass returns a non-0
** value, the conversion is aborted.
*/
virtual int converted(const char *, size_t);
/*
** End of conversion.
**
** Returns true if all calls to converted() returned 0,
** false if the conversion was aborted.
**
** errflag is set to true if there was a character that could
** not be converted, and passed to converted().
*/
bool end(bool &errflag)
{
return end(&errflag);
}
bool end()
{
return end(NULL);
}
/* Convert between two different charsets */
static std::string convert(const std::string &text,
const std::string &charset,
const std::string &dstcharset,
bool &errflag);
/* Convert between two different charsets */
static std::string convert(const std::string &text,
const std::string &charset,
const std::string &dstcharset)
{
bool dummy;
return convert(text, charset, dstcharset, dummy);
}
/* Convert from unicode to a charset */
static std::string convert(const std::vector<unicode_char> &uc,
const std::string &dstcharset,
bool &errflag);
/* Convert from unicode to a charset */
static std::string convert(const std::vector<unicode_char> &uc,
const std::string &dstcharset)
{
bool dummy;
return convert(uc, dstcharset, dummy);
}
/* Convert charset to unicode */
static bool convert(const std::string &text,
const std::string &charset,
std::vector<unicode_char> &uc);
/* Convert to upper/lower/title case */
static std::string
convert_tocase(/* Text string */
const std::string &text,
/* Its charset */
const std::string &charset,
/* First character: unicode_uc, unicode_lc, or unicode_tc */
unicode_char (*first_char_func)(unicode_char),
/* If not NULL, second and subsequent chars */
unicode_char (*char_func)(unicode_char)
=NULL)
{
bool dummy;
return convert_tocase(text, charset, dummy,
first_char_func,
char_func);
}
/* Convert to upper/lower/title case */
static std::string
convert_tocase(/* Text string */
const std::string &text,
/* Its charset */
const std::string &charset,
/* Set if there's a conversion error */
bool &err,
/* First character: unicode_uc, unicode_lc, or unicode_tc */
unicode_char (*first_char_func)(unicode_char),
/* If not NULL, second and subsequent chars */
unicode_char (*char_func)(unicode_char)
=NULL);
private:
bool end(bool *);
public:
class tou;
class fromu;
};
/* Convert output of iconvert to unicode_chars. */
class iconvert::tou : public iconvert {
public:
bool begin(const std::string &chset);
virtual int converted(const unicode_char *, size_t);
using iconvert::operator();
private:
int converted(const char *ptr, size_t cnt);
public:
template<typename iter_t> class to_iter_class;
template<typename input_iter_t,
typename output_iter_t>
static output_iter_t convert(input_iter_t from_iter,
input_iter_t to_iter,
const std::string &chset,
output_iter_t out_iter);
template<typename input_iter_t>
static void convert(input_iter_t from_iter,
input_iter_t to_iter,
const std::string &chset,
std::vector<unicode_char> &out_buf)
{
out_buf.clear();
std::back_insert_iterator<std::vector<unicode_char> >
insert_iter(out_buf);
convert(from_iter, to_iter, chset, insert_iter);
}
static void convert(const std::string &str,
const std::string &chset,
std::vector<unicode_char> &out_buf);
};
/* Helper class that saves unicode output into an output iterator */
template<typename iter_t>
class iconvert::tou::to_iter_class : public iconvert::tou {
iter_t iter;
public:
to_iter_class(iter_t iterValue)
: iter(iterValue) {}
using tou::operator();
operator iter_t() const { return iter; }
private:
int converted(const unicode_char *ptr, size_t cnt)
{
while (cnt)
{
*iter=*ptr;
++iter;
++ptr;
--cnt;
}
return 0;
}
};
template<typename input_iter_t,
typename output_iter_t>
output_iter_t iconvert::tou::convert(input_iter_t from_iter,
input_iter_t to_iter,
const std::string &chset,
output_iter_t out_iter)
{
class to_iter_class<output_iter_t> out(out_iter);
if (!out.begin(chset))
return out;
std::vector<char> string;
while (from_iter != to_iter)
{
string.push_back(*from_iter++);
if (string.size() > 31)
{
out(&string[0], string.size());
string.clear();
}
}
if (string.size() > 0)
out(&string[0], string.size());
out.end();
return out;
}
/* Convert output of iconvert from unicode_chars. */
class iconvert::fromu : public iconvert {
public:
bool begin(const std::string &chset);
using iconvert::operator();
template<typename iter_t> class to_iter_class;
template<typename input_iter_t,
typename output_iter_t>
static output_iter_t convert(input_iter_t from_iter,
input_iter_t to_iter,
const std::string &chset,
output_iter_t out_iter);
template<typename input_iter_t>
static void convert(input_iter_t from_iter,
input_iter_t to_iter,
const std::string &chset,
std::string &out_buf)
{
out_buf="";
std::back_insert_iterator<std::string>
insert_iter(out_buf);
convert(from_iter, to_iter, chset, insert_iter);
}
static void convert(const std::vector<unicode_char> &ubuf,
const std::string &chset,
std::string &out_buf);
static std::string convert(const std::vector<unicode_char>
&ubuf,
const std::string &chset);
};
/* Helper class that saves unicode output into an output iterator */
template<typename iter_t>
class iconvert::fromu::to_iter_class : public iconvert::fromu {
iter_t iter;
public:
to_iter_class(iter_t iterValue)
: iter(iterValue) {}
using fromu::operator();
operator iter_t() const { return iter; }
private:
int converted(const char *ptr, size_t cnt)
{
while (cnt)
{
*iter=*ptr;
++iter;
++ptr;
--cnt;
}
return 0;
}
};
template<typename input_iter_t,
typename output_iter_t>
output_iter_t iconvert::fromu::convert(input_iter_t from_iter,
input_iter_t to_iter,
const std::string &chset,
output_iter_t out_iter)
{
class to_iter_class<output_iter_t> out(out_iter);
if (!out.begin(chset))
return out;
std::vector<unicode_char> string;
while (from_iter != to_iter)
{
string.push_back(*from_iter++);
if (string.size() > 31)
{
out(&string[0], string.size());
string.clear();
}
}
if (string.size() > 0)
out(&string[0], string.size());
out.end();
return out;
}
/*
** Unicode linebreaking algorithm, tr14.
*/
extern "C" int linebreak_trampoline(int value, void *ptr);
extern "C" int linebreakc_trampoline(int value, unicode_char ch,
void *ptr);
/*
** Subclass linebreak_callback_base, implement operator()(int).
**
** Use operator<< or operator()(iterator, iterator) to feed
** unicode_chars into the linebreaking algorithm. The subclass receives
** UNICODE_LB values, as they become available.
*/
class linebreak_callback_base {
unicode_lb_info_t handle;
int opts;
linebreak_callback_base(const linebreak_callback_base &);
/* NOT IMPLEMENTED */
linebreak_callback_base &operator==(const
linebreak_callback_base &);
/* NOT IMPLEMENTED */
public:
linebreak_callback_base();
~linebreak_callback_base();
void finish();
void set_opts(int opts);
friend int linebreak_trampoline(int, void *);
linebreak_callback_base &operator<<(unicode_char uc);
template<typename iter_type>
linebreak_callback_base &operator()(iter_type beg_iter,
iter_type end_iter)
{
while (beg_iter != end_iter)
operator<<(*beg_iter++);
return *this;
}
linebreak_callback_base &operator<<(const
std::vector<unicode_char>
&vec)
{
return operator()(vec.begin(), vec.end());
}
private:
virtual int operator()(int);
};
class linebreak_callback_save_buf : public linebreak_callback_base {
public:
std::list<int> lb_buf;
linebreak_callback_save_buf();
~linebreak_callback_save_buf();
private:
int operator()(int value);
};
/*
** Convert an input iterator sequence over unicode_chars into
** an input iterator sequence over linebreak values.
*/
template<typename input_t> class linebreak_iter
: public std::iterator<std::input_iterator_tag, int, void>
{
mutable input_t iter_value, end_iter_value;
mutable linebreak_callback_save_buf *buf;
void fill() const
{
if (buf == NULL)
return;
while (buf->lb_buf.empty())
{
if (iter_value == end_iter_value)
{
buf->finish();
if (buf->lb_buf.empty())
{
delete buf;
buf=NULL;
}
break;
}
buf->operator<<(*iter_value++);
}
}
mutable value_type bufvalue;
public:
linebreak_iter(const input_t &iter_valueArg,
const input_t &iter_endvalueArg)
: iter_value(iter_valueArg),
end_iter_value(iter_endvalueArg),
buf(new linebreak_callback_save_buf)
{
}
linebreak_iter() : buf(NULL)
{
}
void set_opts(int opts)
{
if (buf)
buf->set_opts(opts);
}
~linebreak_iter()
{
if (buf)
delete buf;
}
linebreak_iter(const linebreak_iter<input_t> &v)
: buf(NULL)
{
operator=(v);
}
linebreak_iter<input_t> &operator=(const
linebreak_iter<input_t> &v)
{
if (buf)
delete buf;
buf=v.buf;
iter_value=v.iter_value;
end_iter_value=v.end_iter_value;
v.buf=NULL;
return *this;
}
bool operator==(const linebreak_iter<input_t> &v) const
{
fill();
v.fill();
return buf == NULL && v.buf == NULL;
}
bool operator!=(const linebreak_iter<input_t> &v) const
{
return !operator==(v);
}
value_type operator*() const
{
fill();
return buf == NULL ? UNICODE_LB_MANDATORY:
buf->lb_buf.front();
}
linebreak_iter<input_t> &operator++()
{
bufvalue=operator*();
if (buf)
buf->lb_buf.pop_front();
return *this;
}
const value_type *operator++(int)
{
operator++();
return &bufvalue;
}
};
/*
** Like linebreak_callback_base, except the subclass receives both
** the linebreaking value, and the unicode character.
*/
class linebreakc_callback_base {
unicode_lbc_info_t handle;
int opts;
linebreakc_callback_base(const linebreakc_callback_base &);
/* NOT IMPLEMENTED */
linebreakc_callback_base &operator==(const
linebreakc_callback_base
&);
/* NOT IMPLEMENTED */
public:
linebreakc_callback_base();
~linebreakc_callback_base();
void finish();
void set_opts(int opts);
friend int linebreakc_trampoline(int, unicode_char, void *);
linebreakc_callback_base &operator<<(unicode_char uc);
template<typename iter_type>
linebreakc_callback_base &operator()(iter_type beg_iter,
iter_type end_iter)
{
while (beg_iter != end_iter)
operator<<(*beg_iter++);
return *this;
}
linebreakc_callback_base &operator<<(const
std::vector<unicode_char>
&vec)
{
return operator()(vec.begin(), vec.end());
}
private:
virtual int operator()(int, unicode_char);
};
class linebreakc_callback_save_buf : public linebreakc_callback_base {
public:
std::list<std::pair<int, unicode_char> > lb_buf;
linebreakc_callback_save_buf();
~linebreakc_callback_save_buf();
private:
int operator()(int, unicode_char);
};
/*
** Convert an input iterator sequence over unicode_chars into
** an input iterator sequence over std::pair<int, unicode_char>,
** the original unicode character, and the linebreaking value before
** the character.
*/
template<typename input_t> class linebreakc_iter
: public std::iterator<std::input_iterator_tag,
std::pair<int, unicode_char>, void>
{
mutable input_t iter_value, end_iter_value;
mutable linebreakc_callback_save_buf *buf;
void fill() const
{
if (buf == NULL)
return;
while (buf->lb_buf.empty())
{
if (iter_value == end_iter_value)
{
buf->finish();
if (buf->lb_buf.empty())
{
delete buf;
buf=NULL;
}
break;
}
buf->operator<<(*iter_value);
++iter_value;
}
}
mutable value_type bufvalue;
public:
linebreakc_iter(const input_t &iter_valueArg,
const input_t &iter_endvalueArg)
: iter_value(iter_valueArg),
end_iter_value(iter_endvalueArg),
buf(new linebreakc_callback_save_buf)
{
}
linebreakc_iter() : buf(NULL)
{
}
~linebreakc_iter()
{
if (buf)
delete buf;
}
linebreakc_iter(const linebreakc_iter<input_t> &v)
: buf(NULL)
{
operator=(v);
}
linebreakc_iter<input_t> &operator=(const
linebreakc_iter<input_t> &v)
{
if (buf)
delete buf;
buf=v.buf;
iter_value=v.iter_value;
end_iter_value=v.end_iter_value;
v.buf=NULL;
return *this;
}
bool operator==(const linebreakc_iter<input_t> &v) const
{
fill();
v.fill();
return buf == NULL && v.buf == NULL;
}
bool operator!=(const linebreakc_iter<input_t> &v) const
{
return !operator==(v);
}
value_type operator*() const
{
fill();
return buf == NULL ?
std::make_pair(UNICODE_LB_MANDATORY,
(unicode_char)0):
buf->lb_buf.front();
}
linebreakc_iter<input_t> &operator++()
{
bufvalue=operator*();
if (buf)
buf->lb_buf.pop_front();
return *this;
}
const value_type *operator++(int)
{
operator++();
return &bufvalue;
}
};
/*
** Subclass wordbreak_callback_base, implement operator()(int).
**
** Use operator<< or operator()(iterator, iterator) to feed
** unicode_chars into the wordbreaking algorithm. The subclass receives
** word flags, as they become available.
*/
extern "C" int wordbreak_trampoline(int value, void *ptr);
class wordbreak_callback_base {
unicode_wb_info_t handle;
wordbreak_callback_base(const wordbreak_callback_base &);
/* NOT IMPLEMENTED */
wordbreak_callback_base &operator==(const
wordbreak_callback_base &);
/* NOT IMPLEMENTED */
public:
wordbreak_callback_base();
~wordbreak_callback_base();
void finish();
friend int wordbreak_trampoline(int, void *);
wordbreak_callback_base &operator<<(unicode_char uc);
template<typename iter_type>
wordbreak_callback_base &operator()(iter_type beg_iter,
iter_type end_iter)
{
while (beg_iter != end_iter)
operator<<(*beg_iter++);
return *this;
}
wordbreak_callback_base &operator<<(const
std::vector<unicode_char>
&vec)
{
return operator()(vec.begin(), vec.end());
}
private:
virtual int operator()(bool);
};
/*
** A C++ wrapper for unicode_wbscan.
*/
class wordbreakscan {
unicode_wbscan_info_t handle;
wordbreakscan(const wordbreakscan &);
/* NOT IMPLEMENTED */
wordbreakscan &operator==(const wordbreakscan &);
/* NOT IMPLEMENTED */
public:
wordbreakscan();
~wordbreakscan();
bool operator<<(unicode_char uc);
size_t finish();
};
}
#endif
#endif
