diff options
Diffstat (limited to 'lib/mbiter.h')
| -rw-r--r-- | lib/mbiter.h | 104 |
1 files changed, 52 insertions, 52 deletions
diff --git a/lib/mbiter.h b/lib/mbiter.h index a4782d4..8f443b5 100644 --- a/lib/mbiter.h +++ b/lib/mbiter.h @@ -1,5 +1,5 @@ /* Iterating through multibyte strings: macros for multi-byte encodings. - Copyright (C) 2001, 2005, 2007 Free Software Foundation, Inc. + Copyright (C) 2001, 2005, 2007, 2009, 2010 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by @@ -69,14 +69,14 @@ Here are the function prototypes of the macros. - extern void mbi_init (mbi_iterator_t iter, - const char *startptr, size_t length); - extern bool mbi_avail (mbi_iterator_t iter); - extern void mbi_advance (mbi_iterator_t iter); - extern mbchar_t mbi_cur (mbi_iterator_t iter); - extern const char * mbi_cur_ptr (mbi_iterator_t iter); - extern void mbi_reloc (mbi_iterator_t iter, ptrdiff_t ptrdiff); - extern void mbi_copy (mbi_iterator_t *new, const mbi_iterator_t *old); + extern void mbi_init (mbi_iterator_t iter, + const char *startptr, size_t length); + extern bool mbi_avail (mbi_iterator_t iter); + extern void mbi_advance (mbi_iterator_t iter); + extern mbchar_t mbi_cur (mbi_iterator_t iter); + extern const char * mbi_cur_ptr (mbi_iterator_t iter); + extern void mbi_reloc (mbi_iterator_t iter, ptrdiff_t ptrdiff); + extern void mbi_copy (mbi_iterator_t *new, const mbi_iterator_t *old); */ #ifndef _MBITER_H @@ -99,17 +99,17 @@ struct mbiter_multi { - const char *limit; /* pointer to end of string */ - bool in_shift; /* true if next byte may not be interpreted as ASCII */ - mbstate_t state; /* if in_shift: current shift state */ - bool next_done; /* true if mbi_avail has already filled the following */ - struct mbchar cur; /* the current character: - const char *cur.ptr pointer to current character - The following are only valid after mbi_avail. - size_t cur.bytes number of bytes of current character - bool cur.wc_valid true if wc is a valid wide character - wchar_t cur.wc if wc_valid: the current character - */ + const char *limit; /* pointer to end of string */ + bool in_shift; /* true if next byte may not be interpreted as ASCII */ + mbstate_t state; /* if in_shift: current shift state */ + bool next_done; /* true if mbi_avail has already filled the following */ + struct mbchar cur; /* the current character: + const char *cur.ptr pointer to current character + The following are only valid after mbi_avail. + size_t cur.bytes number of bytes of current character + bool cur.wc_valid true if wc is a valid wide character + wchar_t cur.wc if wc_valid: the current character + */ }; static inline void @@ -123,8 +123,8 @@ mbiter_multi_next (struct mbiter_multi *iter) if (is_basic (*iter->cur.ptr)) { /* These characters are part of the basic character set. ISO C 99 - guarantees that their wide character code is identical to their - char code. */ + guarantees that their wide character code is identical to their + char code. */ iter->cur.bytes = 1; iter->cur.wc = *iter->cur.ptr; iter->cur.wc_valid = true; @@ -135,39 +135,39 @@ mbiter_multi_next (struct mbiter_multi *iter) iter->in_shift = true; with_shift: iter->cur.bytes = mbrtowc (&iter->cur.wc, iter->cur.ptr, - iter->limit - iter->cur.ptr, &iter->state); + iter->limit - iter->cur.ptr, &iter->state); if (iter->cur.bytes == (size_t) -1) - { - /* An invalid multibyte sequence was encountered. */ - iter->cur.bytes = 1; - iter->cur.wc_valid = false; - /* Whether to set iter->in_shift = false and reset iter->state - or not is not very important; the string is bogus anyway. */ - } + { + /* An invalid multibyte sequence was encountered. */ + iter->cur.bytes = 1; + iter->cur.wc_valid = false; + /* Whether to set iter->in_shift = false and reset iter->state + or not is not very important; the string is bogus anyway. */ + } else if (iter->cur.bytes == (size_t) -2) - { - /* An incomplete multibyte character at the end. */ - iter->cur.bytes = iter->limit - iter->cur.ptr; - iter->cur.wc_valid = false; - /* Whether to set iter->in_shift = false and reset iter->state - or not is not important; the string end is reached anyway. */ - } + { + /* An incomplete multibyte character at the end. */ + iter->cur.bytes = iter->limit - iter->cur.ptr; + iter->cur.wc_valid = false; + /* Whether to set iter->in_shift = false and reset iter->state + or not is not important; the string end is reached anyway. */ + } else - { - if (iter->cur.bytes == 0) - { - /* A null wide character was encountered. */ - iter->cur.bytes = 1; - assert (*iter->cur.ptr == '\0'); - assert (iter->cur.wc == 0); - } - iter->cur.wc_valid = true; - - /* When in the initial state, we can go back treating ASCII - characters more quickly. */ - if (mbsinit (&iter->state)) - iter->in_shift = false; - } + { + if (iter->cur.bytes == 0) + { + /* A null wide character was encountered. */ + iter->cur.bytes = 1; + assert (*iter->cur.ptr == '\0'); + assert (iter->cur.wc == 0); + } + iter->cur.wc_valid = true; + + /* When in the initial state, we can go back treating ASCII + characters more quickly. */ + if (mbsinit (&iter->state)) + iter->in_shift = false; + } } iter->next_done = true; } |