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#include <defs.h>
void
mcpu_text_init( mcpu_text *text )
{
if( text == NULL )
return;
text->data = NULL;
text->length = 0;
text->capacity = 0;
}
void
mcpu_text_free( mcpu_text *text )
{
if( text == NULL )
return;
free( text->data );
text->data = NULL;
text->length = 0;
text->capacity = 0;
}
int
mcpu_text_reserve( mcpu_text *text, size_t need )
{
__mpu_char16_t *p;
size_t capacity;
if( text == NULL )
return( -1 );
if( need <= text->capacity )
return( 0 );
capacity = text->capacity ? text->capacity : 256;
while( capacity < need )
{
if( capacity > (SIZE_MAX / 2) )
{
errno = EOVERFLOW;
return( -1 );
}
capacity *= 2;
}
if( capacity > (SIZE_MAX / sizeof(__mpu_char16_t)) )
{
errno = EOVERFLOW;
return( -1 );
}
p = (__mpu_char16_t *)realloc( text->data,
capacity * sizeof(__mpu_char16_t) );
if( p == NULL )
return( -1 );
text->data = p;
text->capacity = capacity;
return( 0 );
}
int
mcpu_text_append( mcpu_text *text,
const __mpu_char16_t *data, size_t length )
{
if( text == NULL || (data == NULL && length != 0) )
{
errno = EINVAL;
return( -1 );
}
if( length > SIZE_MAX - text->length - 1 )
{
errno = EOVERFLOW;
return( -1 );
}
if( mcpu_text_reserve( text, text->length + length + 1 ) != 0 )
return( -1 );
if( length != 0 )
memcpy( text->data + text->length, data,
length * sizeof(__mpu_char16_t) );
text->length += length;
text->data[text->length] = 0;
return( 0 );
}
int
mcpu_text_append_char( mcpu_text *text, __mpu_char16_t ch )
{
return( mcpu_text_append( text, &ch, 1 ) );
}
int
mcpu_text_append_ascii( mcpu_text *text, const char *s )
{
if( text == NULL || s == NULL )
{
errno = EINVAL;
return( -1 );
}
while( *s )
{
unsigned char c = (unsigned char)*s++;
if( c > 0x7f )
{
errno = EILSEQ;
return( -1 );
}
if( mcpu_text_append_char( text, (__mpu_char16_t)c ) != 0 )
return( -1 );
}
return( 0 );
}
int
mcpu_text_append_utf8( mcpu_text *text, const char *s )
{
__mpu_char16_t *u;
__mpu_size_t n;
int rc;
if( text == NULL || s == NULL )
{
errno = EINVAL;
return( -1 );
}
n = mpu_utf8_to_ucs2( NULL, (const __mpu_char8_t *)s, 0 );
if( n == (__mpu_size_t)-1 )
return( -1 );
u = (__mpu_char16_t *)calloc( (size_t)n + 1, sizeof(__mpu_char16_t) );
if( u == NULL )
return( -1 );
if( mpu_utf8_to_ucs2( u, (const __mpu_char8_t *)s,
(size_t)n + 1 ) == (__mpu_size_t)-1 )
{
free( u );
return( -1 );
}
rc = mcpu_text_append( text, u, (size_t)n );
free( u );
return( rc );
}
int
mcpu_text_from_utf8( mcpu_text *text, const char *s )
{
if( text == NULL || s == NULL )
{
errno = EINVAL;
return( -1 );
}
mcpu_text_free( text );
mcpu_text_init( text );
return( mcpu_text_append_utf8( text, s ) );
}
char *
mcpu_text_to_utf8( const __mpu_char16_t *data, size_t length )
{
__mpu_char16_t *tmp;
__mpu_char8_t *out;
__mpu_size_t n;
if( data == NULL && length != 0 )
{
errno = EINVAL;
return( NULL );
}
tmp = (__mpu_char16_t *)calloc( length + 1, sizeof(__mpu_char16_t) );
if( tmp == NULL )
return( NULL );
if( length != 0 )
memcpy( tmp, data, length * sizeof(__mpu_char16_t) );
n = mpu_ucs2_to_utf8( NULL, tmp, 0 );
if( n == (__mpu_size_t)-1 )
{
free( tmp );
return( NULL );
}
out = (__mpu_char8_t *)calloc( (size_t)n + 1, 1 );
if( out == NULL )
{
free( tmp );
return( NULL );
}
if( mpu_ucs2_to_utf8( out, tmp, (size_t)n + 1 ) == (__mpu_size_t)-1 )
{
free( out );
free( tmp );
return( NULL );
}
free( tmp );
return( (char *)out );
}
int
mcpu_text_equal_ascii( const __mpu_char16_t *data,
size_t length, const char *s )
{
size_t i;
if( data == NULL || s == NULL )
return( 0 );
for( i = 0; i < length && s[i]; ++i )
{
if( data[i] != (__mpu_char16_t)(unsigned char)s[i] )
return( 0 );
}
return( i == length && s[i] == 0 );
}
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