projects / wxWidgets.git / blame
| Commit | Line | Data |
|---|---|---|
| 65ec6247 RD |
1 | // Scintilla source code edit control |
| 2 | /** @file UniConversion.cxx | |
| 3 | ** Functions to handle UFT-8 and UCS-2 strings. | |
| 4 | **/ | |
| 5 | // Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org> | |
| f6bcfd97 BP |
6 | // The License.txt file describes the conditions under which this software may be distributed. |
| 7 | ||
| 8 | #include <stdlib.h> | |
| 9 | ||
| 10 | #include "UniConversion.h" | |
| 11 | ||
| 12 | unsigned int UTF8Length(const wchar_t *uptr, unsigned int tlen) { | |
| 13 | unsigned int len = 0; | |
| 14 | for (unsigned int i = 0; i < tlen && uptr[i]; i++) { | |
| 15 | unsigned int uch = uptr[i]; | |
| 16 | if (uch < 0x80) | |
| 17 | len++; | |
| 18 | else if (uch < 0x800) | |
| 19 | len+=2; | |
| 20 | else | |
| 21 | len +=3; | |
| 22 | } | |
| 23 | return len; | |
| 24 | } | |
| 25 | ||
| 26 | void UTF8FromUCS2(const wchar_t *uptr, unsigned int tlen, char *putf, unsigned int len) { | |
| 27 | int k = 0; | |
| 28 | for (unsigned int i = 0; i < tlen && uptr[i]; i++) { | |
| 29 | unsigned int uch = uptr[i]; | |
| 30 | if (uch < 0x80) { | |
| 31 | putf[k++] = static_cast<char>(uch); | |
| 32 | } else if (uch < 0x800) { | |
| 33 | putf[k++] = static_cast<char>(0xC0 | (uch >> 6)); | |
| 34 | putf[k++] = static_cast<char>(0x80 | (uch & 0x3f)); | |
| 35 | } else { | |
| 36 | putf[k++] = static_cast<char>(0xE0 | (uch >> 12)); | |
| 37 | putf[k++] = static_cast<char>(0x80 | ((uch >> 6) & 0x3f)); | |
| 38 | putf[k++] = static_cast<char>(0x80 | (uch & 0x3f)); | |
| 39 | } | |
| 40 | } | |
| 41 | putf[len] = '\0'; | |
| 42 | } | |
| 43 | ||
| 44 | unsigned int UCS2Length(const char *s, unsigned int len) { | |
| 45 | unsigned int ulen = 0; | |
| 46 | for (unsigned int i=0;i<len;i++) { | |
| 47 | unsigned char ch = static_cast<unsigned char>(s[i]); | |
| 48 | if ((ch < 0x80) || (ch > (0x80 + 0x40))) | |
| 49 | ulen++; | |
| 50 | } | |
| 51 | return ulen; | |
| 52 | } | |
| 53 | ||
| 54 | unsigned int UCS2FromUTF8(const char *s, unsigned int len, wchar_t *tbuf, unsigned int tlen) { | |
| f6bcfd97 BP |
55 | unsigned int ui=0; |
| 56 | const unsigned char *us = reinterpret_cast<const unsigned char *>(s); | |
| 57 | unsigned int i=0; | |
| 58 | while ((i<len) && (ui<tlen)) { | |
| 59 | unsigned char ch = us[i++]; | |
| 60 | if (ch < 0x80) { | |
| 61 | tbuf[ui] = ch; | |
| 62 | } else if (ch < 0x80 + 0x40 + 0x20) { | |
| 63 | tbuf[ui] = static_cast<wchar_t>((ch & 0x1F) << 6); | |
| 64 | ch = us[i++]; | |
| 65 | tbuf[ui] = static_cast<wchar_t>(tbuf[ui] + (ch & 0x7F)); | |
| 66 | } else { | |
| 67 | tbuf[ui] = static_cast<wchar_t>((ch & 0xF) << 12); | |
| 68 | ch = us[i++]; | |
| 69 | tbuf[ui] = static_cast<wchar_t>(tbuf[ui] + ((ch & 0x7F) << 6)); | |
| 70 | ch = us[i++]; | |
| 71 | tbuf[ui] = static_cast<wchar_t>(tbuf[ui] + (ch & 0x7F)); | |
| 72 | } | |
| 73 | ui++; | |
| 74 | } | |
| 75 | return ui; | |
| f6bcfd97 | 76 | } |