diff options
Diffstat (limited to 'code/fe310/eos/unicode.c')
| -rw-r--r-- | code/fe310/eos/unicode.c | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/code/fe310/eos/unicode.c b/code/fe310/eos/unicode.c deleted file mode 100644 index 2915791..0000000 --- a/code/fe310/eos/unicode.c +++ /dev/null @@ -1,180 +0,0 @@ -#include "unicode.h" - -int utf8_enc(utf32_t ch, utf8_t *str) { - if (ch <= 0x7f) { - str[0] = ch; - return 1; - } else if (ch <= 0x7ff) { - str[0] = 0xc0 | (ch >> 6); - str[1] = 0x80 | (ch & 0x3f); - return 2; - } else if (ch <= 0xffff) { - if ((ch >= 0xd800) && (ch <= 0xdfff)) return UTF_ERR; - str[0] = 0xe0 | (ch >> 12); - str[1] = 0x80 | ((ch >> 6) & 0x3f); - str[2] = 0x80 | (ch & 0x3f); - return 3; - } else if (ch <= 0x10ffff) { - str[0] = 0xf0 | (ch >> 18); - str[1] = 0x80 | ((ch >> 12) & 0x3f); - str[2] = 0x80 | ((ch >> 6) & 0x3f); - str[3] = 0x80 | (ch & 0x3f); - return 4; - } else { - return UTF_ERR; - } -} - -int utf8_dec(utf8_t *str, utf32_t *ch) { - if ((str[0] & 0x80) == 0x00) { - *ch = str[0]; - return 1; - } else if ((str[0] & 0xe0) == 0xc0) { - if ((str[1] & 0xc0) != 0x80) return UTF_ERR; - *ch = (utf32_t)(str[0] & 0x1f) << 6; - *ch |= (utf32_t)(str[1] & 0x3f); - if (*ch < 0x80) return UTF_ERR; - return 2; - } else if ((str[0] & 0xf0) == 0xe0) { - if (((str[1] & 0xc0) != 0x80) || ((str[2] & 0xc0) != 0x80)) return UTF_ERR; - *ch = (utf32_t)(str[0] & 0x0f) << 12; - *ch |= (utf32_t)(str[1] & 0x3f) << 6; - *ch |= (utf32_t)(str[2] & 0x3f); - if ((*ch >= 0xd800) && (*ch <= 0xdfff)) return UTF_ERR; - if (*ch < 0x800) return UTF_ERR; - return 3; - } else if ((str[0] & 0xf8) == 0xf0) { - if (((str[1] & 0xc0) != 0x80) || ((str[2] & 0xc0) != 0x80) || ((str[3] & 0xc0) != 0x80)) return UTF_ERR; - *ch = (utf32_t)(str[0] & 0x07) << 18; - *ch |= (utf32_t)(str[1] & 0x0f) << 12; - *ch |= (utf32_t)(str[2] & 0x3f) << 6; - *ch |= (utf32_t)(str[3] & 0x3f); - if (*ch < 0x010000) return UTF_ERR; - if (*ch > 0x10ffff) return UTF_ERR; - return 4; - } else { - return UTF_ERR; - } -} - -int utf8_seek(utf8_t *str, int off, utf32_t *ch) { - int i; - int len = 0; - - if (off < 0) { - off = -off; - for (i=0; i<off; i++) { - len--; - while ((str[len] & 0xc0) == 0x80) len--; - } - } else { - for (i=0; i<off; i++) { - if ((str[len] & 0x80) == 0x00) { - len += 1; - } else if ((str[0] & 0xe0) == 0xc0) { - len += 2; - } else if ((str[0] & 0xf0) == 0xe0) { - len += 3; - } else if ((str[0] & 0xf8) == 0xf0) { - len += 4; - } - } - } - utf8_dec(str + len, ch); - return len; -} - -int utf8_verify(utf8_t *str, int str_size, int *str_len) { - utf32_t ch; - uint8_t ch_l; - int len = 0; - - while (len < str_size) { - if (str_size - len < 4) { - if (((str[len] & 0xf8) == 0xf0) || - (((str[len] & 0xf0) == 0xe0) && (str_size - len < 3)) || - (((str[len] & 0xe0) == 0xc0) && (str_size - len < 2))) { - break; - } - } - ch_l = utf8_dec(str + len, &ch); - if (ch_l > 0) { - if (ch == 0) { - *str_len = len; - return UTF_OK; - } - len += ch_l; - } else { - break; - } - } - *str_len = len; - return UTF_ERR; -} - -int utf16_enc(utf32_t ch, uint8_t *str) { - if (ch <= 0xffff) { - if ((ch >= 0xd800) && (ch <= 0xdfff)) return UTF_ERR; - str[0] = ch >> 8; - str[1] = ch & 0xff; - return 2; - } else if (ch <= 0x10ffff) { - uint16_t hi; - uint16_t lo; - - ch -= 0x10000; - hi = (ch >> 10) + 0xd800; - lo = (ch & 0x3ff) + 0xdc00; - str[0] = hi >> 8; - str[1] = hi & 0xff; - str[2] = lo >> 8; - str[3] = lo & 0xff; - return 4; - } else { - return UTF_ERR; - } -} - -int utf16_dec(uint8_t *str, utf32_t *ch) { - *ch = (str[0] << 8) | str[1]; - if ((*ch >= 0xd800) && (*ch <= 0xdfff)) { - uint16_t hi = *ch; - uint16_t lo; - - if (hi > 0xdbff) return UTF_ERR; - lo = (str[2] << 8) | str[3]; - if ((lo < 0xdc00) || (lo > 0xdfff)) return UTF_ERR; - *ch = (((hi - 0xd800) << 10) | (lo - 0xdc00)) + 0x10000; - return 4; - } else { - return 2; - } -} - -int utf16_seek(uint8_t *str, int off, utf32_t *ch) { - int i; - int len = 0; - uint16_t cu; - - if (off < 0) { - off = -off; - for (i=0; i<off; i++) { - len -= 2; - cu = (str[len] << 8) | str[len + 1]; - if ((cu >= 0xdc00) && (cu <= 0xdfff)) { - len -= 2; - } - } - } else { - for (i=0; i<off; i++) { - cu = (str[len] << 8) | str[len + 1]; - if ((cu >= 0xd800) && (cu <= 0xdbff)) { - len += 4; - } else { - len += 2; - } - } - } - utf16_dec(str + len, ch); - return len; -} |