/* * Copyright 1996 by Jutta Degener and Carsten Bormann, Technische * Universitaet Berlin.  See the accompanying file "COPYRIGHT" for * details.  THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE. *//*$Header*//* Generate code to pack a bit array from a name:#bits description */#include	<stdio.h>#include	"taste.h"#include	"proto.h"#include	<limits.h>/* This module goes back to one Jeff Chilton used for his implementation * of the #49 WAV GSM format.  (In his original patch 8, it replaced * bitter.c.) * * In Microsoft's WAV #49 version of the GSM format, two 32 1/2 * byte GSM frames are packed together to make one WAV frame, and * the GSM parameters are packed into bytes right-to-left rather * than left-to-right. * * That is, where toast's GSM format writes * * 	aaaaaabb bbbbcccc cdddddee ... *	___1____ ___2____ ___3____ * *  for parameters a (6 bits), b (6 bits), c (5 bits), d (5 bits), e .. *  the WAV format has * * 	bbaaaaaa ccccbbbb eedddddc ... *	___1____ ___2____ ___3____ * *  (This format looks a lot prettier if one pictures octets coming *  in through a fifo queue from the left, rather than waiting in the *  right-hand remainder of a C array.) */#define WORD_BITS	16	/* sizeof(uword) * CHAR_BIT on the 				 * target architecture---if this isn't 16,				 * you're in trouble with this library anyway.				 */#define CHAR_BITS	 8	/* CHAR_BIT on the target architecture---				 * if this isn't 8, you're in *deep* trouble.				 */void write_code P2((s_spex, n_spex), struct spex * s_spex, int n_spex){	struct spex	* sp = s_spex;	int		  n_in = 0;	printf("uword sr = 0;\n");	for (; n_spex > 0; n_spex--, sp++) {		/*	insert       old 		 *	new var	     value     unused		 *	here  		 *		 *	[____________xxxxxx**********]		 *		 *	<----- n_in ------>		 */		printf("sr = sr >> %d | %s << %d;\n",			sp->varsize,			sp->var, 			WORD_BITS - sp->varsize);		n_in += sp->varsize;		while (n_in >= CHAR_BIT) {			printf("*c++ = sr >> %d;\n",				WORD_BITS - n_in);			n_in -= CHAR_BIT;		}	}	while (n_in >= CHAR_BIT) {		printf("*c++ = sr >> %d;\n", WORD_BITS - n_in);		n_in -= CHAR_BIT;	}	if (n_in > 0) {		fprintf(stderr, "warning: %d bits left over\n", n_in);	}}