diff options
Diffstat (limited to 'utf8.cpp')
| -rw-r--r-- | utf8.cpp | 93 |
1 files changed, 76 insertions, 17 deletions
@@ -1,7 +1,7 @@ /* Brainuino Aleph - Copyright (C) 2012, 2013 Dmitry Mikhirev + Copyright (C) 2012-2014 Dmitry Mikhirev This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -15,15 +15,16 @@ You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. -*/ + */ #include "utf8.h" #include <string.h> -utf8::utf8 (char* input) +utf8::utf8 (const char* input) { _bytes = strlen(input); _string = strdup(input); + _string_p = NULL; _chars = 0; for (_index = 0; _index < _bytes; _index++) { if ((_string[_index] & 0x80) == 0x00) { @@ -42,25 +43,83 @@ utf8::utf8 (char* input) _index = 0; } +utf8::utf8 (const __FlashStringHelper* input) +{ + _string_p = (char*) input; + _string = NULL; + _bytes = strlen_P(_string_p); + _chars = 0; + for (_index = 0; _index < _bytes; _index++) { + if ((pgm_read_byte(_string_p + _index) & 0x80) == 0x00) { + _chars++; + } else if ((pgm_read_byte(_string_p + _index) & 0x20) == 0x00) { + _chars++; + _index ++; + } else if ((pgm_read_byte(_string_p + _index) & 0x10) == 0x00) { + _chars++; + _index += 2; + } else if ((pgm_read_byte(_string_p + _index) & 0x08) == 0x00) { + _chars++; + _index += 3; + } + } + _index = 0; +} + utf8::~utf8 () { - free(_string); + if (_string != NULL) + free(_string); } -int32_t utf8::get() +wchar_t utf8::get() { - int32_t code; - if ((_string[_index] & 0x80) == 0) { - code = int32_t(_string[_index]); - _index++; - } else if ((_string[_index] & 0x20) == 0) { - code = int32_t(_string[_index] & 0x1f) << 6 | int32_t(_string[_index+1] & 0x3f); - _index += 2; - } else if ((_string[_index] & 0x10) == 0) { - code = int32_t(_string[_index] & 0xf) << 12 | int32_t(_string[_index+1] & 0x3f) << 6 | int32_t(_string[_index+2] & 0x3f); - _index += 3; - } else if ((_string[_index] & 0x8) == 0) { - code = int32_t(_string[_index] & 0x7) << 18 | int32_t(_string[_index+1] & 0x3f) << 12 | int32_t(_string[_index+2] & 0x3f) << 6 | int32_t(_string[_index+3] & 0x3f); + wchar_t code; + if (_string_p == NULL) { // string in RAM + if ((_string[_index] & 0x80) == 0) { + code = wchar_t(_string[_index]); + _index++; + } else if ((_string[_index] & 0x20) == 0) { + code = wchar_t(_string[_index] & 0x1f) << 6 | + wchar_t(_string[_index+1] & 0x3f); + _index += 2; + } else if ((_string[_index] & 0x10) == 0) { + code = wchar_t(_string[_index] & 0x0f) << 12 | + wchar_t(_string[_index+1] & 0x3f) << 6 | + wchar_t(_string[_index+2] & 0x3f); + _index += 3; + } else if (((_string[_index] & 0x8) == 0) && (sizeof(code) >= 3)) { + code = wchar_t(_string[_index] & 0x07) << 18 | + wchar_t(_string[_index+1] & 0x3f) << 12 | + wchar_t(_string[_index+2] & 0x3f) << 6 | + wchar_t(_string[_index+3] & 0x3f); + } else { + code = '?'; + _index++; + } + } else { // string in flash + byte first = pgm_read_byte(_string_p + _index); + if ((first & 0x80) == 0) { + code = wchar_t(first); + _index++; + } else if ((first & 0x20) == 0) { + code = wchar_t(first & 0x1f) << 6 | + wchar_t(pgm_read_byte(_string_p + _index + 1) & 0x3f); + _index += 2; + } else if ((first & 0x10) == 0) { + code = wchar_t(first & 0x0f) << 12 | + wchar_t(pgm_read_byte(_string_p + _index + 1) & 0x3f) << 6 | + wchar_t(pgm_read_byte(_string_p + _index + 2) & 0x3f); + _index += 3; + } else if (((first & 0x8) == 0) && (sizeof(code) >= 3)) { + code = wchar_t(first & 0x07) << 18 | + wchar_t(pgm_read_byte(_string_p + _index + 1) & 0x3f) << 12 | + wchar_t(pgm_read_byte(_string_p + _index + 2) & 0x3f) << 6 | + wchar_t(pgm_read_byte(_string_p + _index + 3) & 0x3f); + } else { + code = '?'; + _index++; + } } if (_index >= _bytes) _index = 0; return code; |