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Search backwards for a UTF-8 character in a string
#include <utf8.h>
char *utf8strrchr( char const *string_base,
char const *start_char,
char const *mbchar,
int *count );
- string_base
- A pointer to the beginning of the string to search.
- start_char
- A pointer to the character in the string from which to search.
- mbchar
- The character to look for.
- count
- A pointer to the location where utf8strrchr() stores the
number of UTF-8 characters the matching character is from the start of
the search.
ph
This function searches backwards from start_char to
string_base (inclusive) for a UTF-8 character that matches
mbchar.
If such a match is found, count (if provided)
is set to the number of UTF-8 characters the matching character is from
the start of the search. For example, if mbchar matches the
start_char character in string, count is set
to 0. If
mbchar matches the previous character in string,
count is set to 1.
A pointer to the beginning of the matching character within
string_base is returned.
If no match is found, the function returns NULL and doesn't
change count.
Note that
start_char doesn't need to be on a character boundary.
A pointer to the matched character, or NULL if none was
found.
Search from the end of a string for a match to the provided UTF-8 character:
#include <Pt.h>
int main()
{
char string[] = "Hello there: äîòéü found";
char mbchar[] = "é";
int count;
char *p;
if( (p = utf8strrchr( string, string + strlen( string ) - 1,
mbchar, &count ) ) )
{
printf(
"Character found: \n%d characters from the end.\n",
count );
printf( "Byte offset %d.\n", p - string );
}
else
printf( "Not found.\n" );
}
Photon
Safety: | |
Interrupt handler |
No |
Signal handler |
Yes |
Thread |
Yes |
utf8strchr(),
utf8strichr(),
utf8strnchr(),
utf8strnichr(),
utf8strirchr()
Unicode Multilingual Support
in the Photon Programmer's Guide
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