зеркало из https://github.com/github/ruby.git
63 строки
1.7 KiB
C
63 строки
1.7 KiB
C
#include "prism/enc/pm_encoding.h"
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static size_t
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pm_encoding_gbk_char_width(const uint8_t *b, ptrdiff_t n) {
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// These are the single byte characters.
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if (*b < 0x80) {
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return 1;
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}
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// These are the double byte characters.
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if (
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(n > 1) &&
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(
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((b[0] >= 0xA1 && b[0] <= 0xA9) && (b[1] >= 0xA1 && b[1] <= 0xFE)) || // GBK/1
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((b[0] >= 0xB0 && b[0] <= 0xF7) && (b[1] >= 0xA1 && b[1] <= 0xFE)) || // GBK/2
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((b[0] >= 0x81 && b[0] <= 0xA0) && (b[1] >= 0x40 && b[1] <= 0xFE) && (b[1] != 0x7F)) || // GBK/3
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((b[0] >= 0xAA && b[0] <= 0xFE) && (b[1] >= 0x40 && b[1] <= 0xA0) && (b[1] != 0x7F)) || // GBK/4
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((b[0] >= 0xA8 && b[0] <= 0xA9) && (b[1] >= 0x40 && b[1] <= 0xA0) && (b[1] != 0x7F)) // GBK/5
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)
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) {
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return 2;
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}
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return 0;
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}
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static size_t
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pm_encoding_gbk_alpha_char(const uint8_t *b, ptrdiff_t n) {
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if (pm_encoding_gbk_char_width(b, n) == 1) {
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return pm_encoding_ascii_alpha_char(b, n);
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} else {
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return 0;
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}
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}
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static size_t
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pm_encoding_gbk_alnum_char(const uint8_t *b, ptrdiff_t n) {
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if (pm_encoding_gbk_char_width(b, n) == 1) {
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return pm_encoding_ascii_alnum_char(b, n);
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} else {
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return 0;
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}
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}
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static bool
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pm_encoding_gbk_isupper_char(const uint8_t *b, ptrdiff_t n) {
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if (pm_encoding_gbk_char_width(b, n) == 1) {
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return pm_encoding_ascii_isupper_char(b, n);
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} else {
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return false;
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}
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}
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/** GBK encoding */
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pm_encoding_t pm_encoding_gbk = {
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.name = "gbk",
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.char_width = pm_encoding_gbk_char_width,
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.alnum_char = pm_encoding_gbk_alnum_char,
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.alpha_char = pm_encoding_gbk_alpha_char,
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.isupper_char = pm_encoding_gbk_isupper_char,
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.multibyte = true
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};
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