mirror of https://github.com/fltk/fltk
224 lines
8.1 KiB
C
224 lines
8.1 KiB
C
/*
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* Author: Jean-Marc Lienher ( http://oksid.ch )
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* Copyright 2000-2010 by O'ksi'D.
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* Copyright 2016-2021 by Bill Spitzak and others.
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*
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* This library is free software. Distribution and use rights are outlined in
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* the file "COPYING" which should have been included with this file. If this
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* file is missing or damaged, see the license at:
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*
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* https://www.fltk.org/COPYING.php
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*
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* Please see the following page on how to report bugs and issues:
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*
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* https://www.fltk.org/bugs.php
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*/
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/* Merged in some functionality from the fltk-2 version. IMM.
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* The following code is an attempt to merge the functions incorporated in FLTK2
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* with the functions provided in OksiD's fltk-1.1.6-utf8 port
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*/
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/**
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\file fl_utf8.h
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\brief header for Unicode and UTF-8 character handling
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*/
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#ifndef _HAVE_FL_UTF8_HDR_
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#define _HAVE_FL_UTF8_HDR_
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#include "Fl_Export.H"
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#include "fl_types.h"
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#include <stdio.h> // FILE *fl_fopen()
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#include <sys/stat.h> // struct stat
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** \addtogroup fl_unicode
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@{
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*/
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/* F2: comes from FLTK2 */
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/* OD: comes from OksiD */
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/**
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Return the number of bytes needed to encode the given UCS4 character in UTF-8.
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\param [in] ucs UCS4 encoded character
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\return number of bytes required
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*/
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FL_EXPORT int fl_utf8bytes(unsigned ucs);
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/* OD: returns the byte length of the first UTF-8 char sequence (returns -1 if not valid) */
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FL_EXPORT int fl_utf8len(char c);
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/* OD: returns the byte length of the first UTF-8 char sequence (returns +1 if not valid) */
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FL_EXPORT int fl_utf8len1(char c);
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/* OD: returns the byte length of a UTF-8 text */
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FL_EXPORT int fl_utf8strlen(const char *text, int len);
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/* OD: returns the number of Unicode chars in the UTF-8 string */
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FL_EXPORT int fl_utf_nb_char(const unsigned char *buf, int len);
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/* F2: Convert the next UTF-8 char-sequence into a Unicode value (and say how many bytes were used) */
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FL_EXPORT unsigned fl_utf8decode(const char* p, const char* end, int* len);
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/* F2: Encode a Unicode value into a UTF-8 sequence, return the number of bytes used */
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FL_EXPORT int fl_utf8encode(unsigned ucs, char* buf);
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/* F2: Move forward to the next valid UTF-8 sequence start betwen start and end */
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FL_EXPORT const char* fl_utf8fwd(const char* p, const char* start, const char* end);
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/* F2: Move backward to the previous valid UTF-8 sequence start */
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FL_EXPORT const char* fl_utf8back(const char* p, const char* start, const char* end);
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/* XX: Convert a single 32-bit Unicode value into UTF16 */
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FL_EXPORT unsigned fl_ucs_to_Utf16(const unsigned ucs, unsigned short *dst, const unsigned dstlen);
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/* F2: Convert a UTF-8 string into UTF16 */
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FL_EXPORT unsigned fl_utf8toUtf16(const char* src, unsigned srclen, unsigned short* dst, unsigned dstlen);
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/* F2: Convert a UTF-8 string into a wide character string - makes UTF16 on win32, "UCS4" elsewhere */
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FL_EXPORT unsigned fl_utf8towc(const char *src, unsigned srclen, wchar_t *dst, unsigned dstlen);
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/* F2: Convert a wide character string to UTF-8 - takes in UTF16 on win32, "UCS4" elsewhere */
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FL_EXPORT unsigned fl_utf8fromwc(char *dst, unsigned dstlen, const wchar_t *src, unsigned srclen);
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/* F2: Convert a UTF-8 string into ASCII, eliding untranslatable glyphs */
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FL_EXPORT unsigned fl_utf8toa (const char *src, unsigned srclen, char *dst, unsigned dstlen);
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/* F2: Convert 8859-1 string to UTF-8 */
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FL_EXPORT unsigned fl_utf8froma (char *dst, unsigned dstlen, const char *src, unsigned srclen);
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/* F2: Returns true if the current O/S locale is UTF-8 */
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FL_EXPORT int fl_utf8locale(void);
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/* F2: Examine the first len characters of src, to determine if the input text is UTF-8 or not
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* NOTE: The value returned is not simply boolean - it contains information about the probable
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* type of the src text. */
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FL_EXPORT int fl_utf8test(const char *src, unsigned len);
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/* XX: return width of "raw" ucs character in columns.
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* for internal use only */
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FL_EXPORT int fl_wcwidth_(unsigned int ucs);
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/* XX: return width of UTF-8 character string in columns.
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* NOTE: this may also do C1 control character (0x80 to 0x9f) to CP1252 mapping,
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* depending on original build options */
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FL_EXPORT int fl_wcwidth(const char *src);
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/* OD: Return true if the character is non-spacing */
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FL_EXPORT unsigned int fl_nonspacing(unsigned int ucs);
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/* F2: Convert UTF-8 to a local multi-byte encoding - mainly for win32? */
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FL_EXPORT unsigned fl_utf8to_mb(const char *src, unsigned srclen, char *dst, unsigned dstlen);
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/* OD: Convert UTF-8 to a local multi-byte encoding */
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FL_EXPORT char* fl_utf2mbcs(const char *src);
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/* F2: Convert a local multi-byte encoding to UTF-8 - mainly for win32? */
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FL_EXPORT unsigned fl_utf8from_mb(char *dst, unsigned dstlen, const char *src, unsigned srclen);
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/*****************************************************************************/
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#ifdef _WIN32
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/* these two Windows-only functions are kept for API compatibility */
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/* OD: Attempt to convert the UTF-8 string to the current locale */
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FL_EXPORT char *fl_utf8_to_locale(const char *s, int len, unsigned int codepage);
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/* OD: Attempt to convert a string in the current locale to UTF-8 */
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FL_EXPORT char *fl_locale_to_utf8(const char *s, int len, unsigned int codepage);
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#endif /* _WIN32 */
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/*****************************************************************************
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* The following functions are intended to provide portable, UTF-8 aware
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* versions of standard functions
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*/
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/* OD: UTF-8 aware strncasecmp - converts to lower case Unicode and tests */
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FL_EXPORT int fl_utf_strncasecmp(const char *s1, const char *s2, int n);
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/* OD: UTF-8 aware strcasecmp - converts to Unicode and tests */
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FL_EXPORT int fl_utf_strcasecmp(const char *s1, const char *s2);
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/* OD: return the Unicode lower case value of ucs */
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FL_EXPORT int fl_tolower(unsigned int ucs);
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/* OD: return the Unicode upper case value of ucs */
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FL_EXPORT int fl_toupper(unsigned int ucs);
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/* OD: converts the UTF-8 string to the lower case equivalent */
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FL_EXPORT int fl_utf_tolower(const unsigned char *str, int len, char *buf);
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/* OD: converts the UTF-8 string to the upper case equivalent */
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FL_EXPORT int fl_utf_toupper(const unsigned char *str, int len, char *buf);
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/* OD: Portable UTF-8 aware chmod wrapper */
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FL_EXPORT int fl_chmod(const char* f, int mode);
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/* OD: Portable UTF-8 aware access wrapper */
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FL_EXPORT int fl_access(const char* f, int mode);
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/* OD: Portable UTF-8 aware stat wrapper */
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FL_EXPORT int fl_stat(const char *path, struct stat *buffer);
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/* OD: Portable UTF-8 aware getcwd wrapper */
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FL_EXPORT char *fl_getcwd(char *buf, int len);
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/* Portable UTF-8 aware chdir wrapper */
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FL_EXPORT int fl_chdir(const char *path);
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/* OD: Portable UTF-8 aware fopen wrapper */
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FL_EXPORT FILE *fl_fopen(const char *f, const char *mode);
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/* OD: Portable UTF-8 aware system wrapper */
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FL_EXPORT int fl_system(const char* f);
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/* OD: Portable UTF-8 aware execvp wrapper */
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FL_EXPORT int fl_execvp(const char *file, char *const *argv);
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/* OD: Portable UTF-8 aware open wrapper */
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FL_EXPORT int fl_open(const char *fname, int oflags, ...);
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FL_EXPORT int fl_open_ext(const char *fname, int binary, int oflags, ...);
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/* Portable wrapper around unix-style close() function */
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FL_EXPORT int fl_close_fd(int fd);
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/* OD: Portable UTF-8 aware unlink wrapper */
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FL_EXPORT int fl_unlink(const char *fname);
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/* OD: Portable UTF-8 aware rmdir wrapper */
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FL_EXPORT int fl_rmdir(const char *f);
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/* OD: Portable UTF-8 aware getenv wrapper */
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FL_EXPORT char* fl_getenv(const char *name);
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/* Portable UTF-8 aware putenv wrapper */
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FL_EXPORT int fl_putenv(const char *var);
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/* OD: Portable UTF-8 aware mkdir wrapper */
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FL_EXPORT int fl_mkdir(const char* f, int mode);
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/* OD: Portable UTF-8 aware rename wrapper */
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FL_EXPORT int fl_rename(const char* f, const char *t);
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/* OD: Given a full pathname, this will create the directory path needed to hold the file named */
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FL_EXPORT void fl_make_path_for_file( const char *path );
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/* OD: recursively create a path in the file system */
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FL_EXPORT char fl_make_path( const char *path );
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/** @} */
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/*****************************************************************************/
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* _HAVE_FL_UTF8_HDR_ */
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