/*
 * $Id: str_dyn.c 197 2008-06-09 06:24:10Z baconevi $
 *
 * {License}
 */

#include <ase/cmn/str.h>
#include <ase/cmn/mem.h>

ase_str_t* ase_str_open (ase_str_t* str, ase_size_t capa, ase_mmgr_t* mmgr)
{
	if (str == ASE_NULL) 
	{
		str = (ase_str_t*) 
			ASE_MALLOC (mmgr, ASE_SIZEOF(ase_str_t));
		if (str == ASE_NULL) return ASE_NULL;
		str->__dynamic = ASE_TRUE;
	}
	else str->__dynamic = ASE_FALSE;

	str->mmgr = mmgr;
	str->buf = (ase_char_t*) ASE_MALLOC (
		mmgr, ASE_SIZEOF(ase_char_t) * (capa + 1));
	if (str->buf == ASE_NULL) 
	{
		if (str->__dynamic) ASE_FREE (mmgr, str);
		return ASE_NULL;
	}

	str->size = 0;
	str->capa  = capa;
	str->buf[0] = ASE_T('\0');

	return str;
}

void ase_str_close (ase_str_t* str)
{
	ASE_FREE (str->mmgr, str->buf);
	if (str->__dynamic) ASE_FREE (str->mmgr, str);
}

void ase_str_clear (ase_str_t* str)
{
	str->size = 0;
	str->buf[0] = ASE_T('\0');
}

void ase_str_forfeit (ase_str_t* str)
{
	if (str->__dynamic) ASE_FREE (str->mmgr, str);
}

void ase_str_swap (ase_str_t* str, ase_str_t* str1)
{
	ase_str_t tmp;

	tmp.buf = str->buf;
	tmp.size = str->size;
	tmp.capa = str->capa;
	tmp.mmgr = str->mmgr;

	str->buf = str1->buf;
	str->size = str1->size;
	str->capa = str1->capa;
	str->mmgr = str1->mmgr;

	str1->buf = tmp.buf;
	str1->size = tmp.size;
	str1->capa = tmp.capa;
	str1->mmgr = tmp.mmgr;
}

ase_size_t ase_str_cpy (ase_str_t* str, const ase_char_t* s)
{
	/* TODO: improve it */
	return ase_str_ncpy (str, s, ase_strlen(s));
}

ase_size_t ase_str_ncpy (ase_str_t* str, const ase_char_t* s, ase_size_t len)
{
	ase_char_t* buf;

	if (len > str->capa) 
	{
		buf = (ase_char_t*) ASE_MALLOC (
			str->mmgr, ASE_SIZEOF(ase_char_t) * (len + 1));
		if (buf == ASE_NULL) return (ase_size_t)-1;

		ASE_FREE (str->mmgr, str->buf);
		str->capa = len;
		str->buf = buf;
	}

	str->size = ase_strncpy (str->buf, s, len);
	str->buf[str->size] = ASE_T('\0');
	return str->size;
}

ase_size_t ase_str_cat (ase_str_t* str, const ase_char_t* s)
{
	/* TODO: improve it */
	return ase_str_ncat (str, s, ase_strlen(s));
}

ase_size_t ase_str_ncat (ase_str_t* str, const ase_char_t* s, ase_size_t len)
{
	if (len > str->capa - str->size) 
	{
		ase_char_t* tmp;
		ase_size_t capa;

		capa = str->size + len;

		/* double the capa if necessary for concatenation */
		if (capa < str->capa * 2) capa = str->capa * 2;

		if (str->mmgr->realloc != ASE_NULL)
		{
			tmp = (ase_char_t*) ASE_REALLOC (
				str->mmgr, str->buf, 
				ASE_SIZEOF(ase_char_t) * (capa + 1));
			if (tmp == ASE_NULL) return (ase_size_t)-1;
		}
		else
		{
			tmp = (ase_char_t*) ASE_MALLOC (
				str->mmgr, ASE_SIZEOF(ase_char_t)*(capa+1));
			if (tmp == ASE_NULL) return (ase_size_t)-1;
			if (str->buf != ASE_NULL)
			{
				ase_memcpy (tmp, str->buf, 
					ASE_SIZEOF(ase_char_t)*(str->capa+1));
				ASE_FREE (str->mmgr, str->buf);
			}
		}

		str->capa = capa;
		str->buf = tmp;
	}

	str->size += ase_strncpy (&str->buf[str->size], s, len);
	str->buf[str->size] = ASE_T('\0');
	return str->size;
}

ase_size_t ase_str_ccat (ase_str_t* str, ase_char_t c)
{
	return ase_str_ncat (str, &c, 1);
}

ase_size_t ase_str_nccat (ase_str_t* str, ase_char_t c, ase_size_t len)
{
	while (len > 0)
	{
		if (ase_str_ncat (str, &c, 1) == (ase_size_t)-1) 
		{
			return (ase_size_t)-1;
		}

		len--;
	}
	return str->size;
}