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CPM OPERATING SYSTEMS/CPM 68K/1.0X SOURCES/v103/libe/printf.c

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+/*
+	Copyright 1982
+	Alcyon Corporation
+	8716 Production Ave.
+	San Diego, Ca.  92121
+*/
+
+//char *version "@(#)printf - Mar 7, 1982";
+#include <stdio.h>
+
+/**
+ **	formated print
+ **/
+
+#define BSIZE	80
+#define MAXFILES 15
+
+char *etoa();
+char *ftoa();
+char *petoa();
+char *pftoa();
+
+printf(arg1,arg2,arg3)
+char *arg1, *arg2, *arg3;
+{
+	register char	*fmt, c;
+	char		buf[BSIZE];
+	extern char	*__prtshort(), *__pprtld(), *__prtld();
+	int		mode;
+	char	*fd;
+	register char 	**p;
+	register int *pi;
+	int		width, prec;
+	int		left, longf;
+	char	padchar;
+	char	*s;
+	int		n;
+	auto	(*fn)();
+	int		len;
+
+	if( arg1 == -1 ) {
+		mode = 2;
+		fd = arg2;
+		p = &arg3;
+	}
+	else if( arg1 < MAXFILES ) {
+		mode = 1;		/* printf(fd,fmt,...) or printf(-1,str,fmt,...) */
+		fd = arg1;
+		p = &arg2;
+	}
+	else {
+		mode = 0;
+		fd = 0;
+		p = &arg1;
+	}
+	fmt = *p++;
+
+	pi = p;
+	while (c = *fmt++)
+	{
+		p = pi;
+		if (c != '%')
+		{
+			__pputch(mode, &fd, c);
+			continue;
+		}
+		left = 0;
+		if ((c = *fmt++) == '-')
+		{
+			c = *fmt++;
+			left++;
+		}
+		padchar = ' ';
+		if (c == '0')
+		{
+			padchar = c;
+			c = *fmt++;
+		}
+		width = -1;
+		while (c >= '0' && c <= '9')
+		{
+			if (width < 0)
+				width = 0;
+			width = width * 10 + (c - '0');
+			c = *fmt++;
+		}
+		prec = -1;
+		if (c == '.')
+		{
+			prec = 0;
+			c = *fmt++;
+		}
+		while (c >= '0' && c <= '9')
+		{
+			prec = prec * 10 + (c - '0');
+			c = *fmt++;
+		}
+		longf = 0;
+		if (c == 'l')
+		{
+			longf++;
+			c = *fmt++;
+		}
+		/* we now have all the prelims out of the way;
+		   let's see what we want to print */
+
+		s = buf;
+		switch (c)
+		{
+
+		  case 'd':		/* decimal signed */
+		  case 'D':
+			if (longf)
+				fn = __prtld;
+			else
+				fn = __prtshort;
+			__prtint(pi++, buf, 10, 1, fn, 0);
+			if (longf)
+				pi++;
+			break;
+
+		  case 'u':		/* decimal unsigned */
+		  case 'U':
+			__prtint(pi++, buf, 10, 0, __prtshort, 0);
+			break;
+
+		  case 'o':		/* octal unsigned */
+		  case 'O':
+			if (longf)
+				fn = __prtld;
+			else
+				fn = __prtshort;
+			__prtint(pi++, buf, 8, 0, fn, 0);
+			if (longf)
+				pi++;
+			break;
+
+		  case 'x':		/* hexadecimal unsigned */
+		  case 'X':
+			if (longf)
+				fn = __prtld;
+			else
+				fn = __prtshort;
+			__prtint(pi++, buf, 16, 0, fn, c == 'X');
+			if (longf)
+				pi++;
+			break;
+
+		  case 's':		/* string */
+		  case 'S':
+			s = *p++;
+			pi = p;
+			break;
+
+		  case 'c':		/* character */
+		  case 'C':
+			n = *pi++;
+			buf[0] = n;
+			buf[1] = '\0';
+			break;
+
+		  case 'e':		/* exponential */
+		  case 'E':
+			petoa(pi, buf, prec);
+			pi =+ 2;
+			prec = -1;
+			break;
+
+		  case 'f':		/* floating */
+		  case 'F':
+			pftoa(pi, buf,  prec);
+			pi =+ 2;
+			prec = -1;
+			break;
+
+		  case 'g':		/* e or f */
+		  case 'G':
+			pftoa(pi, buf, prec);
+			if (strlen(buf) > (7 + prec) )	/* smallest fp string */
+				petoa(pi, buf, prec);
+			pi =+ 2;
+			prec = -1;
+			break;
+
+		  default:		/* just print the character */
+			__pputch(mode, &fd, c);
+			continue;
+
+		}
+		len = __length(s);
+		if (prec < len && prec >= 0)
+			len = prec;
+		n = width - len;
+		if (!left)
+		{
+			if (padchar != ' ' && *s == '-')
+			{
+				len--;
+				__pputch(mode, &fd, *s++);
+			}
+			while (n-- > 0)
+				__pputch(mode, &fd, padchar);
+		}
+		while (len--)
+			__pputch(mode, &fd, *s++);
+		while (n-- > 0)
+			__pputch(mode, &fd, padchar);
+	}
+	if (mode == 2)
+		*fd = '\0';
+}
+
+
+__pputch(mode, pfd, c)
+int	mode;
+char	c;
+char	**pfd;
+{
+	register long fd;
+
+	switch (mode)
+	{
+
+	  case 0:
+		putchar(c);
+		break;
+
+	  case 1:
+		fd = *pfd;
+		if (write((int)fd,&c,1) != 1) return(-1);
+		break;
+
+	  case 2:
+		*(*pfd)++ = c;
+		break;
+
+	}
+	return (c);
+}
+
+char *
+pftoa(addr,buf,prec)
+float *addr;
+char *buf;
+int prec;
+{
+	float fp;
+
+	if (prec<0)
+		prec = 6;
+	fp = *addr;
+	return( ftoa(fp, buf, prec) );
+}
+
+char *
+petoa(addr,buf,prec)
+float *addr;
+char *buf;
+int prec;
+{
+	float fp;
+
+	if (prec<0)
+		prec = 6;
+	fp = *addr;
+	return( etoa(fp, buf, prec) );
+}