From a8c3c2a391b4ae20c7f490ab42f6a0d192ca6451 Mon Sep 17 00:00:00 2001 From: ShizZy Date: Mon, 23 Sep 2013 21:46:59 -0400 Subject: [PATCH] added utf8 to common module, utils for dealing with utf8 --- src/common/common.vcxproj | 2 + src/common/common.vcxproj.filters | 2 + src/common/src/utf8.cpp | 463 ++++++++++++++++++++++++++++++ src/common/src/utf8.h | 67 +++++ 4 files changed, 534 insertions(+) create mode 100644 src/common/src/utf8.cpp create mode 100644 src/common/src/utf8.h diff --git a/src/common/common.vcxproj b/src/common/common.vcxproj index 467195e0f..9cf382c29 100644 --- a/src/common/common.vcxproj +++ b/src/common/common.vcxproj @@ -179,6 +179,7 @@ + @@ -196,6 +197,7 @@ + diff --git a/src/common/common.vcxproj.filters b/src/common/common.vcxproj.filters index 0553ce433..ccc15d613 100644 --- a/src/common/common.vcxproj.filters +++ b/src/common/common.vcxproj.filters @@ -17,6 +17,7 @@ + @@ -55,6 +56,7 @@ + diff --git a/src/common/src/utf8.cpp b/src/common/src/utf8.cpp new file mode 100644 index 000000000..283cffdc2 --- /dev/null +++ b/src/common/src/utf8.cpp @@ -0,0 +1,463 @@ +/* + Basic UTF-8 manipulation routines + by Jeff Bezanson + placed in the public domain Fall 2005 + + This code is designed to provide the utilities you need to manipulate + UTF-8 as an internal string encoding. These functions do not perform the + error checking normally needed when handling UTF-8 data, so if you happen + to be from the Unicode Consortium you will want to flay me alive. + I do this because error checking can be performed at the boundaries (I/O), + with these routines reserved for higher performance on data known to be + valid. +*/ + +#ifdef _WIN32 +#include +#undef min +#undef max +#endif + +#include +#include +#include +#include + +#include +#include + +#include "common_types.h" +#include "utf8.h" + +// is start of UTF sequence +inline bool isutf(char c) { + return (c & 0xC0) != 0x80; +} + +static const u32 offsetsFromUTF8[6] = { + 0x00000000UL, 0x00003080UL, 0x000E2080UL, + 0x03C82080UL, 0xFA082080UL, 0x82082080UL +}; + +static const u8 trailingBytesForUTF8[256] = { + 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, + 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, + 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, + 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, + 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, + 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, + 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, + 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 3,3,3,3,3,3,3,3,4,4,4,4,5,5,5,5, +}; + +/* returns length of next utf-8 sequence */ +int u8_seqlen(const char *s) +{ + return trailingBytesForUTF8[(unsigned int)(unsigned char)s[0]] + 1; +} + +/* conversions without error checking + only works for valid UTF-8, i.e. no 5- or 6-byte sequences + srcsz = source size in bytes, or -1 if 0-terminated + sz = dest size in # of wide characters + + returns # characters converted + dest will always be L'\0'-terminated, even if there isn't enough room + for all the characters. + if sz = srcsz+1 (i.e. 4*srcsz+4 bytes), there will always be enough space. +*/ +int u8_toucs(u32 *dest, int sz, const char *src, int srcsz) +{ + u32 ch; + const char *src_end = src + srcsz; + int nb; + int i=0; + + while (i < sz-1) { + nb = trailingBytesForUTF8[(unsigned char)*src]; + if (srcsz == -1) { + if (*src == 0) + goto done_toucs; + } + else { + if (src + nb >= src_end) + goto done_toucs; + } + ch = 0; + switch (nb) { + /* these fall through deliberately */ + case 3: ch += (unsigned char)*src++; ch <<= 6; + case 2: ch += (unsigned char)*src++; ch <<= 6; + case 1: ch += (unsigned char)*src++; ch <<= 6; + case 0: ch += (unsigned char)*src++; + } + ch -= offsetsFromUTF8[nb]; + dest[i++] = ch; + } + done_toucs: + dest[i] = 0; + return i; +} + +/* srcsz = number of source characters, or -1 if 0-terminated + sz = size of dest buffer in bytes + + returns # characters converted + dest will only be '\0'-terminated if there is enough space. this is + for consistency; imagine there are 2 bytes of space left, but the next + character requires 3 bytes. in this case we could NUL-terminate, but in + general we can't when there's insufficient space. therefore this function + only NUL-terminates if all the characters fit, and there's space for + the NUL as well. + the destination string will never be bigger than the source string. +*/ +int u8_toutf8(char *dest, int sz, u32 *src, int srcsz) +{ + u32 ch; + int i = 0; + char *dest_end = dest + sz; + + while (srcsz<0 ? src[i]!=0 : i < srcsz) { + ch = src[i]; + if (ch < 0x80) { + if (dest >= dest_end) + return i; + *dest++ = (char)ch; + } + else if (ch < 0x800) { + if (dest >= dest_end-1) + return i; + *dest++ = (ch>>6) | 0xC0; + *dest++ = (ch & 0x3F) | 0x80; + } + else if (ch < 0x10000) { + if (dest >= dest_end-2) + return i; + *dest++ = (ch>>12) | 0xE0; + *dest++ = ((ch>>6) & 0x3F) | 0x80; + *dest++ = (ch & 0x3F) | 0x80; + } + else if (ch < 0x110000) { + if (dest >= dest_end-3) + return i; + *dest++ = (ch>>18) | 0xF0; + *dest++ = ((ch>>12) & 0x3F) | 0x80; + *dest++ = ((ch>>6) & 0x3F) | 0x80; + *dest++ = (ch & 0x3F) | 0x80; + } + i++; + } + if (dest < dest_end) + *dest = '\0'; + return i; +} + +int u8_wc_toutf8(char *dest, u32 ch) +{ + if (ch < 0x80) { + dest[0] = (char)ch; + return 1; + } + if (ch < 0x800) { + dest[0] = (ch>>6) | 0xC0; + dest[1] = (ch & 0x3F) | 0x80; + return 2; + } + if (ch < 0x10000) { + dest[0] = (ch>>12) | 0xE0; + dest[1] = ((ch>>6) & 0x3F) | 0x80; + dest[2] = (ch & 0x3F) | 0x80; + return 3; + } + if (ch < 0x110000) { + dest[0] = (ch>>18) | 0xF0; + dest[1] = ((ch>>12) & 0x3F) | 0x80; + dest[2] = ((ch>>6) & 0x3F) | 0x80; + dest[3] = (ch & 0x3F) | 0x80; + return 4; + } + return 0; +} + +/* charnum => byte offset */ +int u8_offset(const char *str, int charnum) +{ + int offs=0; + + while (charnum > 0 && str[offs]) { + (void)(isutf(str[++offs]) || isutf(str[++offs]) || + isutf(str[++offs]) || ++offs); + charnum--; + } + return offs; +} + +/* byte offset => charnum */ +int u8_charnum(const char *s, int offset) +{ + int charnum = 0, offs=0; + + while (offs < offset && s[offs]) { + (void)(isutf(s[++offs]) || isutf(s[++offs]) || + isutf(s[++offs]) || ++offs); + charnum++; + } + return charnum; +} + +/* number of characters */ +int u8_strlen(const char *s) +{ + int count = 0; + int i = 0; + + while (u8_nextchar(s, &i) != 0) + count++; + + return count; +} + +/* reads the next utf-8 sequence out of a string, updating an index */ +u32 u8_nextchar(const char *s, int *i) +{ + u32 ch = 0; + int sz = 0; + + do { + ch <<= 6; + ch += (unsigned char)s[(*i)++]; + sz++; + } while (s[*i] && !isutf(s[*i])); + ch -= offsetsFromUTF8[sz-1]; + + return ch; +} + +void u8_inc(const char *s, int *i) +{ + (void)(isutf(s[++(*i)]) || isutf(s[++(*i)]) || + isutf(s[++(*i)]) || ++(*i)); +} + +void u8_dec(const char *s, int *i) +{ + (void)(isutf(s[--(*i)]) || isutf(s[--(*i)]) || + isutf(s[--(*i)]) || --(*i)); +} + +int octal_digit(char c) +{ + return (c >= '0' && c <= '7'); +} + +int hex_digit(char c) +{ + return ((c >= '0' && c <= '9') || + (c >= 'A' && c <= 'F') || + (c >= 'a' && c <= 'f')); +} + +/* assumes that src points to the character after a backslash + returns number of input characters processed */ +int u8_read_escape_sequence(const char *str, u32 *dest) +{ + u32 ch; + char digs[9]="\0\0\0\0\0\0\0\0"; + int dno=0, i=1; + + ch = (u32)str[0]; /* take literal character */ + if (str[0] == 'n') + ch = L'\n'; + else if (str[0] == 't') + ch = L'\t'; + else if (str[0] == 'r') + ch = L'\r'; + else if (str[0] == 'b') + ch = L'\b'; + else if (str[0] == 'f') + ch = L'\f'; + else if (str[0] == 'v') + ch = L'\v'; + else if (str[0] == 'a') + ch = L'\a'; + else if (octal_digit(str[0])) { + i = 0; + do { + digs[dno++] = str[i++]; + } while (octal_digit(str[i]) && dno < 3); + ch = strtol(digs, NULL, 8); + } + else if (str[0] == 'x') { + while (hex_digit(str[i]) && dno < 2) { + digs[dno++] = str[i++]; + } + if (dno > 0) + ch = strtol(digs, NULL, 16); + } + else if (str[0] == 'u') { + while (hex_digit(str[i]) && dno < 4) { + digs[dno++] = str[i++]; + } + if (dno > 0) + ch = strtol(digs, NULL, 16); + } + else if (str[0] == 'U') { + while (hex_digit(str[i]) && dno < 8) { + digs[dno++] = str[i++]; + } + if (dno > 0) + ch = strtol(digs, NULL, 16); + } + *dest = ch; + + return i; +} + +/* convert a string with literal \uxxxx or \Uxxxxxxxx characters to UTF-8 + example: u8_unescape(mybuf, 256, "hello\\u220e") + note the double backslash is needed if called on a C string literal */ +int u8_unescape(char *buf, int sz, char *src) +{ + int c=0, amt; + u32 ch; + char temp[4]; + + while (*src && c < sz) { + if (*src == '\\') { + src++; + amt = u8_read_escape_sequence(src, &ch); + } + else { + ch = (u32)*src; + amt = 1; + } + src += amt; + amt = u8_wc_toutf8(temp, ch); + if (amt > sz-c) + break; + memcpy(&buf[c], temp, amt); + c += amt; + } + if (c < sz) + buf[c] = '\0'; + return c; +} + +const char *u8_strchr(const char *s, u32 ch, int *charn) +{ + int i = 0, lasti=0; + u32 c; + + *charn = 0; + while (s[i]) { + c = u8_nextchar(s, &i); + if (c == ch) { + return &s[lasti]; + } + lasti = i; + (*charn)++; + } + return NULL; +} + +const char *u8_memchr(const char *s, u32 ch, size_t sz, int *charn) +{ + u32 i = 0, lasti=0; + u32 c; + int csz; + + *charn = 0; + while (i < sz) { + c = csz = 0; + do { + c <<= 6; + c += (unsigned char)s[i++]; + csz++; + } while (i < sz && !isutf(s[i])); + c -= offsetsFromUTF8[csz-1]; + + if (c == ch) { + return &s[lasti]; + } + lasti = i; + (*charn)++; + } + return NULL; +} + +int u8_is_locale_utf8(const char *locale) +{ + /* this code based on libutf8 */ + const char* cp = locale; + + for (; *cp != '\0' && *cp != '@' && *cp != '+' && *cp != ','; cp++) { + if (*cp == '.') { + const char* encoding = ++cp; + for (; *cp != '\0' && *cp != '@' && *cp != '+' && *cp != ','; cp++) + ; + if ((cp-encoding == 5 && !strncmp(encoding, "UTF-8", 5)) + || (cp-encoding == 4 && !strncmp(encoding, "utf8", 4))) + return 1; /* it's UTF-8 */ + break; + } + } + return 0; +} + +int UTF8StringNonASCIICount(const char *utf8string) { + UTF8 utf(utf8string); + int count = 0; + while (!utf.end()) { + int c = utf.next(); + if (c > 127) + ++count; + } + return count; +} + +bool UTF8StringHasNonASCII(const char *utf8string) { + return UTF8StringNonASCIICount(utf8string) > 0; +} + +#ifdef _WIN32 + +std::string ConvertWStringToUTF8(const wchar_t *wstr) { + int len = (int)wcslen(wstr); + int size = (int)WideCharToMultiByte(CP_UTF8, 0, wstr, len, 0, 0, NULL, NULL); + std::string s; + s.resize(size); + if (size > 0) { + WideCharToMultiByte(CP_UTF8, 0, wstr, len, &s[0], size, NULL, NULL); + } + return s; +} + +std::string ConvertWStringToUTF8(const std::wstring &wstr) { + int len = (int)wstr.size(); + int size = (int)WideCharToMultiByte(CP_UTF8, 0, wstr.c_str(), len, 0, 0, NULL, NULL); + std::string s; + s.resize(size); + if (size > 0) { + WideCharToMultiByte(CP_UTF8, 0, wstr.c_str(), len, &s[0], size, NULL, NULL); + } + return s; +} + +void ConvertUTF8ToWString(wchar_t *dest, size_t destSize, const std::string &source) { + int len = (int)source.size(); + int size = (int)MultiByteToWideChar(CP_UTF8, 0, source.c_str(), len, NULL, 0); + MultiByteToWideChar(CP_UTF8, 0, source.c_str(), len, dest, std::min((int)destSize, size)); +} + +std::wstring ConvertUTF8ToWString(const std::string &source) { + int len = (int)source.size(); + int size = (int)MultiByteToWideChar(CP_UTF8, 0, source.c_str(), len, NULL, 0); + std::wstring str; + str.resize(size); + if (size > 0) { + MultiByteToWideChar(CP_UTF8, 0, source.c_str(), len, &str[0], size); + } + return str; +} + +#endif \ No newline at end of file diff --git a/src/common/src/utf8.h b/src/common/src/utf8.h new file mode 100644 index 000000000..8df4ffa3a --- /dev/null +++ b/src/common/src/utf8.h @@ -0,0 +1,67 @@ +/* + Basic UTF-8 manipulation routines + by Jeff Bezanson + placed in the public domain Fall 2005 + + This code is designed to provide the utilities you need to manipulate + UTF-8 as an internal string encoding. These functions do not perform the + error checking normally needed when handling UTF-8 data, so if you happen + to be from the Unicode Consortium you will want to flay me alive. + I do this because error checking can be performed at the boundaries (I/O), + with these routines reserved for higher performance on data known to be + valid. +*/ + +// Further modified, and C++ stuff added, by hrydgard@gmail.com. + +#pragma once + +#include "common_types.h" +#include + +u32 u8_nextchar(const char *s, int *i); +int u8_wc_toutf8(char *dest, u32 ch); +int u8_strlen(const char *s); + +class UTF8 { +public: + static const u32 INVALID = (u32)-1; + UTF8(const char *c) : c_(c), index_(0) {} + bool end() const { return c_[index_] == 0; } + u32 next() { + return u8_nextchar(c_, &index_); + } + u32 peek() { + int tempIndex = index_; + return u8_nextchar(c_, &tempIndex); + } + int length() const { + return u8_strlen(c_); + } + int byteIndex() const { + return index_; + } + static int encode(char *dest, u32 ch) { + return u8_wc_toutf8(dest, ch); + } + +private: + const char *c_; + int index_; +}; + +int UTF8StringNonASCIICount(const char *utf8string); + +bool UTF8StringHasNonASCII(const char *utf8string); + + +// UTF8 to Win32 UTF-16 +// Should be used when calling Win32 api calls +#ifdef _WIN32 + +std::string ConvertWStringToUTF8(const std::wstring &wstr); +std::string ConvertWStringToUTF8(const wchar_t *wstr); +void ConvertUTF8ToWString(wchar_t *dest, size_t destSize, const std::string &source); +std::wstring ConvertUTF8ToWString(const std::string &source); + +#endif \ No newline at end of file