/*   * io.c   *   * Implements the simple I/O 'helper' routines.   *   * Not really essential, but these routines were used extensively in GD,   * so they were moved here. They also make IOCtx calls look better...   *   * Written (or, at least, moved) 1999, Philip Warner.   * */#include <math.h>#include <string.h>#include <stdlib.h>#include "gd.h"/* Use this for commenting out debug-print statements. *//* Just use the first '#define' to allow all the prints... *//*#define IO_DBG(s) (s) */#define IO_DBG(s)#define GD_IO_EOF_CHK(r)	\	if (r == EOF) {		\		return 0;	\	}			\/* * Write out a word to the I/O context pointer */void Putword (int w, gdIOCtx * ctx){	unsigned char buf[2];	buf[0] = w & 0xff;	buf[1] = (w / 256) & 0xff;	(ctx->putBuf) (ctx, (char *) buf, 2);}void Putchar (int c, gdIOCtx * ctx){	(ctx->putC) (ctx, c & 0xff);}void gdPutC (const unsigned char c, gdIOCtx * ctx){	(ctx->putC) (ctx, c);}void gdPutWord (int w, gdIOCtx * ctx){	IO_DBG (php_gd_error("Putting word..."));	(ctx->putC) (ctx, (unsigned char) (w >> 8));	(ctx->putC) (ctx, (unsigned char) (w & 0xFF));	IO_DBG (php_gd_error("put."));}void gdPutInt (int w, gdIOCtx * ctx){	IO_DBG (php_gd_error("Putting int..."));	(ctx->putC) (ctx, (unsigned char) (w >> 24));	(ctx->putC) (ctx, (unsigned char) ((w >> 16) & 0xFF));	(ctx->putC) (ctx, (unsigned char) ((w >> 8) & 0xFF));	(ctx->putC) (ctx, (unsigned char) (w & 0xFF));	IO_DBG (php_gd_error("put."));}int gdGetC (gdIOCtx * ctx){	return ((ctx->getC) (ctx));}int gdGetByte (int *result, gdIOCtx * ctx){	int r;	r = (ctx->getC) (ctx);	GD_IO_EOF_CHK(r);	*result = r;	return 1;}int gdGetWord (int *result, gdIOCtx * ctx){	int r;	r = (ctx->getC) (ctx);	GD_IO_EOF_CHK(r);	*result = r << 8;	r = (ctx->getC) (ctx);	GD_IO_EOF_CHK(r);	*result += r;	return 1;}int gdGetInt (int *result, gdIOCtx * ctx){	int r;	r = (ctx->getC) (ctx);	GD_IO_EOF_CHK(r);	*result = r << 24;	r = (ctx->getC) (ctx);	GD_IO_EOF_CHK(r);	*result += r << 16;	r = (ctx->getC) (ctx);	if (r == EOF) {		return 0;	}	*result += r << 8;	r = (ctx->getC) (ctx);	GD_IO_EOF_CHK(r);	*result += r;	return 1;}int gdPutBuf (const void *buf, int size, gdIOCtx * ctx){	IO_DBG (php_gd_error("Putting buf..."));	return (ctx->putBuf) (ctx, buf, size);	IO_DBG (php_gd_error("put."));}int gdGetBuf (void *buf, int size, gdIOCtx * ctx){	return (ctx->getBuf) (ctx, buf, size);}int gdSeek (gdIOCtx * ctx, const int pos){	IO_DBG (php_gd_error("Seeking..."));	return ((ctx->seek) (ctx, pos));	IO_DBG (php_gd_error("Done."));}long gdTell (gdIOCtx * ctx){	IO_DBG (php_gd_error("Telling..."));	return ((ctx->tell) (ctx));	IO_DBG (php_gd_error ("told."));}