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#include "commonheaders.h"
LPSTR szOut = nullptr;
LPWSTR wszOut = nullptr;
LPSTR __cdecl utf8encode(LPCWSTR str)
{
LPWSTR wszTemp, w;
int len, i;
if (str == nullptr)
return nullptr;
wszTemp = (LPWSTR)str;
len = 0;
for (w = wszTemp; *w; w++) {
if (*w < 0x0080) len++;
else if (*w < 0x0800) len += 2;
else len += 3;
}
SAFE_FREE(szOut);
if ((szOut = (LPSTR)malloc(len + 1)) == nullptr)
return nullptr;
i = 0;
for (w = wszTemp; *w; w++) {
if (*w < 0x0080)
szOut[i++] = (uint8_t)*w;
else if (*w < 0x0800) {
szOut[i++] = 0xc0 | (((*w) >> 6) & 0x3f);
szOut[i++] = 0x80 | ((*w) & 0x3f);
}
else {
szOut[i++] = 0xe0 | ((*w) >> 12);
szOut[i++] = 0x80 | (((*w) >> 6) & 0x3f);
szOut[i++] = 0x80 | ((*w) & 0x3f);
}
}
szOut[i] = '\0';
return szOut;
}
LPWSTR __cdecl utf8decode(LPCSTR str)
{
int i;
LPSTR p;
// LPWSTR wszOut;
if (str == nullptr) return nullptr;
size_t len = strlen(str) + 1;
SAFE_FREE(wszOut);
if ((wszOut = (LPWSTR)malloc(len*sizeof(wchar_t))) == nullptr)
return nullptr;
p = (LPSTR)str;
i = 0;
while (*p) {
if ((p[0] & 0x80) == 0) {
wszOut[i++] = *(p++);
continue;
}
if ((p[0] & 0xe0) == 0xe0 && (p[1] & 0xc0) == 0x80 && (p[2] & 0xc0) == 0x80) {
wszOut[i] = (*(p++) & 0x0f) << 12;
wszOut[i] |= (*(p++) & 0x3f) << 6;
wszOut[i++] |= (*(p++) & 0x3f);
continue;
}
if ((p[0] & 0xe0) == 0xc0 && (p[1] & 0xc0) == 0x80) {
wszOut[i] = (*(p++) & 0x1f) << 6;
wszOut[i++] |= (*(p++) & 0x3f);
continue;
}
wszOut[i++] = *p++;
}
wszOut[i] = '\0';
return wszOut;
}
// Returns true if the buffer only contains 7-bit characters.
int __cdecl is_7bit_string(LPCSTR str)
{
while (*str) {
if (*str & 0x80) {
return FALSE;
break;
}
str++;
}
return TRUE;
}
//Copyright (C) 2001, 2002 Peter Verthez
//under GNU LGPL
int __cdecl is_utf8_string(LPCSTR str)
{
int expect_bytes = 0;
if (!str) return 0;
while (*str) {
if ((*str & 0x80) == 0) {
/* Looks like an ASCII character */
if (expect_bytes)
/* byte of UTF-8 character expected */
return 0;
else {
/* OK, ASCII character expected */
str++;
}
}
else {
/* Looks like byte of an UTF-8 character */
if (expect_bytes) {
/* expect_bytes already set: first byte of UTF-8 char already seen */
if ((*str & 0xC0) == 0x80) {
/* OK, next byte of UTF-8 character */
/* Decrement number of expected bytes */
expect_bytes--;
str++;
}
else {
/* again first byte ?!?! */
return 0;
}
}
else {
/* First byte of the UTF-8 character */
/* count initial one bits and set expect_bytes to 1 less */
char ch = *str;
while (ch & 0x80) {
expect_bytes++;
ch = (ch & 0x7f) << 1;
}
expect_bytes--;
str++;
}
}
}
return (expect_bytes == 0);
}
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