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#include "yarp/enc/yp_encoding.h"
static size_t
yp_encoding_windows_31j_char_width(const uint8_t *b, ptrdiff_t n) {
// These are the single byte characters.
if (*b < 0x80 || (*b >= 0xA1 && *b <= 0xDF)) {
return 1;
}
// These are the double byte characters.
if (
(n > 1) &&
((b[0] >= 0x81 && b[0] <= 0x9F) || (b[0] >= 0xE0 && b[0] <= 0xFC)) &&
(b[1] >= 0x40 && b[1] <= 0xFC)
) {
return 2;
}
return 0;
}
static size_t
yp_encoding_windows_31j_alpha_char(const uint8_t *b, ptrdiff_t n) {
if (yp_encoding_windows_31j_char_width(b, n) == 1) {
return yp_encoding_ascii_alpha_char(b, n);
} else {
return 0;
}
}
static size_t
yp_encoding_windows_31j_alnum_char(const uint8_t *b, ptrdiff_t n) {
if (yp_encoding_windows_31j_char_width(b, n) == 1) {
return yp_encoding_ascii_alnum_char(b, n);
} else {
return 0;
}
}
static bool
yp_encoding_windows_31j_isupper_char(const uint8_t *b, ptrdiff_t n) {
if (yp_encoding_windows_31j_char_width(b, n) == 1) {
return yp_encoding_ascii_isupper_char(b, n);
} else {
return false;
}
}
yp_encoding_t yp_encoding_windows_31j = {
.name = "windows-31j",
.char_width = yp_encoding_windows_31j_char_width,
.alnum_char = yp_encoding_windows_31j_alnum_char,
.alpha_char = yp_encoding_windows_31j_alpha_char,
.isupper_char = yp_encoding_windows_31j_isupper_char,
.multibyte = true
};
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