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/*
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/*
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	stringbuf: mimicking a bit of C++ to more safely handle strings
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	stringbuf: mimicking a bit of C++ to more safely handle strings
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	copyright 2006-8 by the mpg123 project - free software under the terms of the LGPL 2.1
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	copyright 2006-10 by the mpg123 project - free software under the terms of the LGPL 2.1
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	see COPYING and AUTHORS files in distribution or http://mpg123.org
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	see COPYING and AUTHORS files in distribution or http://mpg123.org
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	initially written by Thomas Orgis
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	initially written by Thomas Orgis
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*/
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*/
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int attribute_align_arg mpg123_set_string(mpg123_string* sb, const char* stuff)
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int attribute_align_arg mpg123_set_string(mpg123_string* sb, const char* stuff)
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{
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{
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	sb->fill = 0;
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	sb->fill = 0;
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	return mpg123_add_string(sb, stuff);
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	return mpg123_add_string(sb, stuff);
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}
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}
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size_t attribute_align_arg mpg123_strlen(mpg123_string *sb, int utf8)
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{
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	size_t i;
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	size_t bytelen;
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	/* Notions of empty string. If there's only a single character, it has to be the trailing zero, and if the first is the trailing zero anyway, we got empty. */
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	if(sb->fill < 2 || sb->p[0] == 0) return 0;
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	/* Find the first non-null character from the back.
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	   We already established that the first character is non-null
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	   That at fill-2 has to be null, though. */
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	for(i=sb->fill-2; i>0; --i)
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	if(sb->p[i] != 0) break;
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	/* For simple byte strings, we are done now. */
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	bytelen = i+1;
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	if(!utf8) return bytelen;
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	else
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	{
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		/* Work out the actual count of UTF8 bytes.
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		   This employs no particular encoding error checking. */
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		size_t len = 0;
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		for(i=0; i
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		{
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			/* Every byte that is not a continuation byte ( 0xc0 == 10xx xxxx ) stands for a character. */
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			if((sb->p[i] & 0xc0) != 0x80) len++;
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		}
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		return len;
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	}
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}
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int attribute_align_arg mpg123_chomp_string(mpg123_string *sb)
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{
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	ssize_t i;
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	if(!sb || !sb->fill) return 0;
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	/* Ensure that it is zero-terminated. */
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	sb->p[sb->fill-1] = 0;
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	for(i=sb->fill-2; i>=0; --i)
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	{
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		char *c = sb->p+i;
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		/* Stop at the first proper character. */
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		if(*c && *c != '\r' && *c != '\n') break;
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		else *c = 0;
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	}
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	/* initial fill at least 1, so i at least -1,
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	   +2 means nothing happened for fill=1 .
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	   With i=0, we got one non-null character, fill shall be 2
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	   to accomodate the trailing zero. */
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	sb->fill = (size_t)i+2;
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	return 1;
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}