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/*
SuperCollider real time audio synthesis system
Copyright (c) 2002 James McCartney. All rights reserved.
http://www.audiosynth.com
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* a 4 byte aligned and zero padded string allows faster string operations. */
#ifndef _SC_Str4_
#define _SC_Str4_
#include "Hash.h"
#include <stdio.h>
#include <limits.h>
#ifndef _LASTCHAR_
#define _LASTCHAR_
#if BYTE_ORDER == LITTLE_ENDIAN
const int32 kLASTCHAR = 0xFF000000;
#else
const int32 kLASTCHAR = 0x000000FF;
#endif
#endif
void str4cpy(int32 *dst, const char *src);
void mem4cpy(int32 *dst, const char *src, int charlen);
// returns the number of pad bytes to add to a string of a given length
inline int str4padbytes(int charlen)
{
return 4 - (charlen & 3);
}
// converts length in bytes to length in words
inline int str4len(int charlen)
{
return (charlen + 4) >> 2;
}
// returns length in words of a char *
inline int str4len(const char *src)
{
const char *src0 = src;
while (*src) { src++; }
return str4len(src - src0);
}
// returns length in words of a int32 *
inline int str4len(const int32 *src)
{
const int32 *src0 = src;
while (*src++ & kLASTCHAR) {}
int wordlen = src - src0;
return wordlen;
}
// returns length in words of a int32 *
inline bool str4eq(const int32 *a, const int32 *b)
{
while(true) {
if (*a != *b) return false;
if ((*a & kLASTCHAR) == 0) return true;
a++; b++;
}
}
// copy an int32 *
inline void str4cpy(int32 *dst, const int32 *src)
{
int32 c;
do {
*dst++ = c = *src++;
} while (c & kLASTCHAR);
}
inline int sc_atoi(char *string)
{
int value = 0;
if (*string == 0) return -1;
uint32 c;
while ((c = *string++ - '0') <= 9) {
value = value * 10 + c;
}
return value;
}
#endif
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