size_t
buffer_read_ (scew_reader *reader, XML_Char *buffer, size_t char_no)
{
size_t read_no = 0;
size_t maxlen = 0;
scew_reader_buffer *buf_reader = NULL;
assert (reader != NULL);
assert (buffer != NULL);
buf_reader = scew_reader_data (reader);
/* Get maximum number of available bytes in buffer. */
maxlen = buf_reader->size - buf_reader->current;
read_no = (char_no > maxlen) ? maxlen : char_no;
scew_memcpy (buffer, buf_reader->buffer + buf_reader->current, read_no);
buf_reader->current += read_no;
return read_no;
}
XML_Char*
scew_strescape (XML_Char const *src)
{
XML_Char *p = (XML_Char *) src;
XML_Char *escaped = NULL;
unsigned int len = 0;
assert (src != NULL);
/* We first need to calculate the size of the new escaped string. */
while (*p != _XT('\0'))
{
switch (*p)
{
case CHR_LT_:
len += LT_SIZE_;
break;
case CHR_GT_:
len += GT_SIZE_;
break;
case CHR_AMP_:
len += AMP_SIZE_;
break;
case CHR_APOS_:
len += APOS_SIZE_;
break;
case CHR_QUOT_:
len += QUOT_SIZE_;
break;
default:
len += 1;
break;
}
p += 1;
}
/* Allocate new string (if necessary). */
escaped = calloc (len + 1, sizeof (XML_Char));
/* Append characters to new string, escaping the needed ones. */
p = (XML_Char *) src;
len = 0;
while (*p != _XT('\0'))
{
switch (*p)
{
case CHR_LT_:
scew_memcpy (&escaped[len], XML_LT_, LT_SIZE_);
len += LT_SIZE_;
break;
case CHR_GT_:
scew_memcpy (&escaped[len], XML_GT_, GT_SIZE_);
len += GT_SIZE_;
break;
case CHR_AMP_:
scew_memcpy (&escaped[len], XML_AMP_, AMP_SIZE_);
len += AMP_SIZE_;
break;
case CHR_APOS_:
scew_memcpy (&escaped[len], XML_APOS_, APOS_SIZE_);
len += APOS_SIZE_;
break;
case CHR_QUOT_:
scew_memcpy (&escaped[len], XML_QUOT_, QUOT_SIZE_);
len += QUOT_SIZE_;
break;
default:
escaped[len] = *p;
len += 1;
break;
}
p += 1;
}
return escaped;
}
