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public: utflib: simplify Q_EncodeUTF8

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This commit is contained in:
Alibek Omarov 2025-02-02 02:31:20 +03:00
parent 5378494199
commit 93ebddfba3
1 changed files with 16 additions and 20 deletions
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36
public/utflib.c
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@ -114,27 +114,35 @@ uint32_t Q_DecodeUTF16( utfstate_t *s, uint32_t in )
return 0; return 0;
} }
size_t Q_EncodeUTF8( char dst[4], uint32_t ch ) static size_t Q_CodepointLength( uint32_t ch )
{ {
if( ch <= 0x7fu ) if( ch <= 0x7fu )
return 1;
else if( ch <= 0x7ffu )
return 2;
else if( ch <= 0xffffu )
return 3;
return 4;
}
size_t Q_EncodeUTF8( char dst[4], uint32_t ch )
{
switch( Q_CodepointLength( ch ))
{ {
case 1:
dst[0] = ch; dst[0] = ch;
return 1; return 1;
} case 2:
else if( ch <= 0x7ffu )
{
dst[0] = 0xc0u | (( ch >> 6 ) & 0x1fu ); dst[0] = 0xc0u | (( ch >> 6 ) & 0x1fu );
dst[1] = 0x80u | (( ch ) & 0x3fu ); dst[1] = 0x80u | (( ch ) & 0x3fu );
return 2; return 2;
} case 3:
else if( ch <= 0xffffu )
{
dst[0] = 0xe0u | (( ch >> 12 ) & 0x0fu ); dst[0] = 0xe0u | (( ch >> 12 ) & 0x0fu );
dst[1] = 0x80u | (( ch >> 6 ) & 0x3fu ); dst[1] = 0x80u | (( ch >> 6 ) & 0x3fu );
dst[2] = 0x80u | (( ch ) & 0x3fu ); dst[2] = 0x80u | (( ch ) & 0x3fu );
return 3; return 3;
} }
dst[0] = 0xf0u | (( ch >> 18 ) & 0x07u ); dst[0] = 0xf0u | (( ch >> 18 ) & 0x07u );
dst[1] = 0x80u | (( ch >> 12 ) & 0x3fu ); dst[1] = 0x80u | (( ch >> 12 ) & 0x3fu );
dst[2] = 0x80u | (( ch >> 6 ) & 0x3fu ); dst[2] = 0x80u | (( ch >> 6 ) & 0x3fu );
@ -163,18 +171,6 @@ size_t Q_UTF8Length( const char *s )
return len; return len;
} }
static size_t Q_CodepointLength( uint32_t ch )
{
if( ch <= 0x7fu )
return 1;
else if( ch <= 0x7ffu )
return 2;
else if( ch <= 0xffffu )
return 3;
return 4;
}
size_t Q_UTF16ToUTF8( char *dst, size_t dstsize, const uint16_t *src, size_t srcsize ) size_t Q_UTF16ToUTF8( char *dst, size_t dstsize, const uint16_t *src, size_t srcsize )
{ {
utfstate_t state = { 0 }; utfstate_t state = { 0 };