/* Iterating through multibyte strings: macros for multi-byte encodings.
- Copyright (C) 2001, 2005, 2007 Free Software Foundation, Inc.
+ Copyright (C) 2001, 2005, 2007, 2009-2014 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
initializes the iterator, starting at startptr and crossing length bytes.
mbi_avail (iter)
- returns true if there are more multibyte chracters available before
+ returns true if there are more multibyte characters available before
the end of string is reached. In this case, mbi_cur (iter) is
- initialized to the next multibyte chracter.
+ initialized to the next multibyte character.
mbi_advance (iter)
advances the iterator by one multibyte character.
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
#include "mbchar.h"
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
+_GL_INLINE_HEADER_BEGIN
+#ifndef MBITER_INLINE
+# define MBITER_INLINE _GL_INLINE
+#endif
+
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
+MBITER_INLINE void
mbiter_multi_next (struct mbiter_multi *iter)
{
if (iter->next_done)
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;
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;
}
-static inline void
+MBITER_INLINE void
mbiter_multi_reloc (struct mbiter_multi *iter, ptrdiff_t ptrdiff)
{
iter->cur.ptr += ptrdiff;
iter->limit += ptrdiff;
}
-static inline void
+MBITER_INLINE void
mbiter_multi_copy (struct mbiter_multi *new_iter, const struct mbiter_multi *old_iter)
{
new_iter->limit = old_iter->limit;
/* Copying an iterator. */
#define mbi_copy mbiter_multi_copy
+_GL_INLINE_HEADER_END
+
#endif /* _MBITER_H */
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