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Slightly modified UTF-8 handling. Based on http://man7.org/linux/man-pages/man7/utf-8.7.html.

This commit is contained in:
Steve 2019-11-06 19:18:03 +00:00
parent cbd7425a31
commit 98274ffa34
1 changed files with 129 additions and 108 deletions
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45
src/system/text.c
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@ -397,26 +397,47 @@ static char *nextCharacter(const char *str, int *i)
static char character[MAX_NAME_LENGTH]; static char character[MAX_NAME_LENGTH];
unsigned char bit; unsigned char bit;
int n; int n, numBits;
memset(character, '\0', MAX_NAME_LENGTH); memset(character, '\0', MAX_NAME_LENGTH);
n = 0;
while (1)
{
bit = (unsigned char)str[*i]; bit = (unsigned char)str[*i];
if ((bit >= ' ' && bit <= '~') || bit >= 0xC0 || bit == '\0') numBits = 0;
if (bit == '\0')
{ {
if (n > 0) return NULL;
{
return character[0] != '\0' ? character : NULL;
} }
else if (bit <= 0x0000007F)
{
numBits = 1;
}
else if (bit <= 0x000007FF)
{
numBits = 2;
}
else if (bit <= 0x0000FFFF)
{
numBits = 3;
}
else if (bit <= 0x001FFFFF)
{
numBits = 4;
}
else if (bit <= 0x03FFFFFF)
{
numBits = 5;
}
else if (bit <= 0x7FFFFFFF)
{
numBits = 6;
} }
character[n++] = str[*i]; for (n = 0 ; n < numBits ; n++)
{
*i = *i + 1; character[n] = str[(*i)++];
} }
return character;
} }