Sha256: c32e74bea1e430cdcaf30601dccd15428db039fc9b74a1f83abbf2bba8f664b5
Contents?: true
Size: 1.05 KB
Versions: 17
Compression:
Stored size: 1.05 KB
Contents
#include "prism/util/pm_memchr.h"
#define PRISM_MEMCHR_TRAILING_BYTE_MINIMUM 0x40
/**
* We need to roll our own memchr to handle cases where the encoding changes and
* we need to search for a character in a buffer that could be the trailing byte
* of a multibyte character.
*/
void *
pm_memchr(const void *memory, int character, size_t number, bool encoding_changed, const pm_encoding_t *encoding) {
if (encoding_changed && encoding->multibyte && character >= PRISM_MEMCHR_TRAILING_BYTE_MINIMUM) {
const uint8_t *source = (const uint8_t *) memory;
size_t index = 0;
while (index < number) {
if (source[index] == character) {
return (void *) (source + index);
}
size_t width = encoding->char_width(source + index, (ptrdiff_t) (number - index));
if (width == 0) {
return NULL;
}
index += width;
}
return NULL;
} else {
return memchr(memory, character, number);
}
}
#undef PRISM_MEMCHR_TRAILING_BYTE_MINIMUM
Version data entries
17 entries across 17 versions & 2 rubygems