/*
	This C language subroutine searches for a character
	within a string.

	The Run Time Library for the C Language.

	Gordon A. Sterling	(617) 461 - 3076
	DSP Development Tools Engineering

	Created on 4/30/90
	Updated on 5/94 by AS
	Updated on 3/95 by AS - seperated polymorphic functions

	#include <string.h>				<Header>
	char *strchr(const char *s1, int c);		<Prototype>
*/

#include "lib_glob.h"
#include "str_glob.h"

.SEGMENT/CODE	Code_Space_Name;
.FILE  		RTL_FILENAME;

.GLOBAL	    _strchr;
.GLOBAL	    ___strchrD;

_strchr:
___strchrD:		
chr_core:	R0=PASS R4, FETCH_RETURN
		R4=PASS R8, dm_ptr=R0;		/*Point to start*/

dm_chr:		R8=DM(dm_ptr,1);		    /*Read first sample*/
		DO find_dm_chr UNTIL FOREVER;
		   COMP(R4,R8);
		   IF EQ JUMP (PC, restore_state) (LA);
		   R8=PASS R8;
		   IF EQ JUMP (PC, end_of_array) (LA);
find_dm_chr:	   R0=R0+1, R8=DM(dm_ptr,1);
		
		COMP(R4,R8);
		IF NE R0=R0-R0;

restore_state:	RETURN (DB);
		RESTORE_STACK
                RESTORE_FRAME

end_of_array:	JUMP (PC, restore_state) (DB);	    /*End of array reached*/
		R0=0;
		nop;

.ENDSEG;