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#include "yarp/enc/yp_encoding.h"
static size_t
yp_encoding_gbk_char_width(const uint8_t *b, ptrdiff_t n) {
// These are the single byte characters.
if (*b < 0x80) {
return 1;
}
// These are the double byte characters.
if (
(n > 1) &&
(
((b[0] >= 0xA1 && b[0] <= 0xA9) && (b[1] >= 0xA1 && b[1] <= 0xFE)) || // GBK/1
((b[0] >= 0xB0 && b[0] <= 0xF7) && (b[1] >= 0xA1 && b[1] <= 0xFE)) || // GBK/2
((b[0] >= 0x81 && b[0] <= 0xA0) && (b[1] >= 0x40 && b[1] <= 0xFE) && (b[1] != 0x7F)) || // GBK/3
((b[0] >= 0xAA && b[0] <= 0xFE) && (b[1] >= 0x40 && b[1] <= 0xA0) && (b[1] != 0x7F)) || // GBK/4
((b[0] >= 0xA8 && b[0] <= 0xA9) && (b[1] >= 0x40 && b[1] <= 0xA0) && (b[1] != 0x7F)) // GBK/5
)
) {
return 2;
}
return 0;
}
static size_t
yp_encoding_gbk_alpha_char(const uint8_t *b, ptrdiff_t n) {
if (yp_encoding_gbk_char_width(b, n) == 1) {
return yp_encoding_ascii_alpha_char(b, n);
} else {
return 0;
}
}
static size_t
yp_encoding_gbk_alnum_char(const uint8_t *b, ptrdiff_t n) {
if (yp_encoding_gbk_char_width(b, n) == 1) {
return yp_encoding_ascii_alnum_char(b, n);
} else {
return 0;
}
}
static bool
yp_encoding_gbk_isupper_char(const uint8_t *b, ptrdiff_t n) {
if (yp_encoding_gbk_char_width(b, n) == 1) {
return yp_encoding_ascii_isupper_char(b, n);
} else {
return false;
}
}
yp_encoding_t yp_encoding_gbk = {
.name = "gbk",
.char_width = yp_encoding_gbk_char_width,
.alnum_char = yp_encoding_gbk_alnum_char,
.alpha_char = yp_encoding_gbk_alpha_char,
.isupper_char = yp_encoding_gbk_isupper_char,
.multibyte = true
};
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