Diff: printf-stdarg.c

Revision:

11:4348bba086a4

Parent:

10:716484b1ddb5

Child:

12:54e7d8ff3a74

--- a/printf-stdarg.c	Tue Apr 05 18:30:41 2016 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,266 +0,0 @@
-/*
-	Copyright 2001, 2002 Georges Menie (www.menie.org)
-	stdarg version contributed by Christian Ettinger
-
-    This program is free software; you can redistribute it and/or modify
-    it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
-
-    You should have received a copy of the GNU Lesser 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
-*/
-
-/*
-	putchar is the only external dependency for this file,
-	if you have a working putchar, leave it commented out.
-	If not, uncomment the define below and
-	replace outbyte(c) by your own function call. */
-
-#define putchar(c) putcharNB(c)
-
-
-#include <stdarg.h>
-
-static void printchar(char **str, int c)
-{
-	extern int putchar(int c);
-	
-	if (str) {
-		**str = c;
-		++(*str);
-	}
-	else (void)putchar(c);
-}
-
-#define PAD_RIGHT 1
-#define PAD_ZERO 2
-
-static int prints(char **out, const char *string, int width, int pad)
-{
-	register int pc = 0, padchar = ' ';
-
-	if (width > 0) {
-		register int len = 0;
-		register const char *ptr;
-		for (ptr = string; *ptr; ++ptr) ++len;
-		if (len >= width) width = 0;
-		else width -= len;
-		if (pad & PAD_ZERO) padchar = '0';
-	}
-	if (!(pad & PAD_RIGHT)) {
-		for ( ; width > 0; --width) {
-			printchar (out, padchar);
-			++pc;
-		}
-	}
-	for ( ; *string ; ++string) {
-		printchar (out, *string);
-		++pc;
-	}
-	for ( ; width > 0; --width) {
-		printchar (out, padchar);
-		++pc;
-	}
-
-	return pc;
-}
-
-/* the following should be enough for 32 bit int */
-#define PRINT_BUF_LEN 12
-
-static int printi(char **out, int i, int b, int sg, int width, int pad, int letbase)
-{
-	char print_buf[PRINT_BUF_LEN];
-	register char *s;
-	register int t, neg = 0, pc = 0;
-	register unsigned int u = i;
-
-	if (i == 0) {
-		print_buf[0] = '0';
-		print_buf[1] = '\0';
-		return prints (out, print_buf, width, pad);
-	}
-
-	if (sg && b == 10 && i < 0) {
-		neg = 1;
-		u = -i;
-	}
-
-	s = print_buf + PRINT_BUF_LEN-1;
-	*s = '\0';
-
-	while (u) {
-		t = u % b;
-		if( t >= 10 )
-			t += letbase - '0' - 10;
-		*--s = t + '0';
-		u /= b;
-	}
-
-	if (neg) {
-		if( width && (pad & PAD_ZERO) ) {
-			printchar (out, '-');
-			++pc;
-			--width;
-		}
-		else {
-			*--s = '-';
-		}
-	}
-
-	return pc + prints (out, s, width, pad);
-}
-
-static int print(char **out, const char *format, va_list args )
-{
-	register int width, pad;
-	register int pc = 0;
-	char scr[2];
-
-	for (; *format != 0; ++format) {
-		if (*format == '%') {
-			++format;
-			width = pad = 0;
-			if (*format == '\0') break;
-			if (*format == '%') goto out;
-			if (*format == '-') {
-				++format;
-				pad = PAD_RIGHT;
-			}
-			while (*format == '0') {
-				++format;
-				pad |= PAD_ZERO;
-			}
-			for ( ; *format >= '0' && *format <= '9'; ++format) {
-				width *= 10;
-				width += *format - '0';
-			}
-			if( *format == 's' ) {
-				register char *s = (char *)va_arg( args, int );
-				pc += prints (out, s?s:"(null)", width, pad);
-				continue;
-			}
-			if( *format == 'd' ) {
-				pc += printi (out, va_arg( args, int ), 10, 1, width, pad, 'a');
-				continue;
-			}
-			if( *format == 'x' ) {
-				pc += printi (out, va_arg( args, int ), 16, 0, width, pad, 'a');
-				continue;
-			}
-			if( *format == 'X' ) {
-				pc += printi (out, va_arg( args, int ), 16, 0, width, pad, 'A');
-				continue;
-			}
-			if( *format == 'u' ) {
-				pc += printi (out, va_arg( args, int ), 10, 0, width, pad, 'a');
-				continue;
-			}
-			if( *format == 'c' ) {
-				/* char are converted to int then pushed on the stack */
-				scr[0] = (char)va_arg( args, int );
-				scr[1] = '\0';
-				pc += prints (out, scr, width, pad);
-				continue;
-			}
-		}
-		else {
-		out:
-			printchar (out, *format);
-			++pc;
-		}
-	}
-	if (out) **out = '\0';
-	va_end( args );
-	return pc;
-}
-
-int printfNB(const char *format, ...)
-{
-        va_list args;
-        
-        va_start( args, format );
-        return print( 0, format, args );
-}
-
-int sprintf(char *out, const char *format, ...)
-{
-        va_list args;
-        
-        va_start( args, format );
-        return print( &out, format, args );
-}
-
-#ifdef TEST_PRINTF
-int main(void)
-{
-	char *ptr = "Hello world!";
-	char *np = 0;
-	int i = 5;
-	unsigned int bs = sizeof(int)*8;
-	int mi;
-	char buf[80];
-
-	mi = (1 << (bs-1)) + 1;
-	printf("%s\n", ptr);
-	printf("printf test\n");
-	printf("%s is null pointer\n", np);
-	printf("%d = 5\n", i);
-	printf("%d = - max int\n", mi);
-	printf("char %c = 'a'\n", 'a');
-	printf("hex %x = ff\n", 0xff);
-	printf("hex %02x = 00\n", 0);
-	printf("signed %d = unsigned %u = hex %x\n", -3, -3, -3);
-	printf("%d %s(s)%", 0, "message");
-	printf("\n");
-	printf("%d %s(s) with %%\n", 0, "message");
-	sprintf(buf, "justif: \"%-10s\"\n", "left"); printf("%s", buf);
-	sprintf(buf, "justif: \"%10s\"\n", "right"); printf("%s", buf);
-	sprintf(buf, " 3: %04d zero padded\n", 3); printf("%s", buf);
-	sprintf(buf, " 3: %-4d left justif.\n", 3); printf("%s", buf);
-	sprintf(buf, " 3: %4d right justif.\n", 3); printf("%s", buf);
-	sprintf(buf, "-3: %04d zero padded\n", -3); printf("%s", buf);
-	sprintf(buf, "-3: %-4d left justif.\n", -3); printf("%s", buf);
-	sprintf(buf, "-3: %4d right justif.\n", -3); printf("%s", buf);
-
-	return 0;
-}
-
-/*
- * if you compile this file with
- *   gcc -Wall $(YOUR_C_OPTIONS) -DTEST_PRINTF -c printf.c
- * you will get a normal warning:
- *   printf.c:214: warning: spurious trailing `%' in format
- * this line is testing an invalid % at the end of the format string.
- *
- * this should display (on 32bit int machine) :
- *
- * Hello world!
- * printf test
- * (null) is null pointer
- * 5 = 5
- * -2147483647 = - max int
- * char a = 'a'
- * hex ff = ff
- * hex 00 = 00
- * signed -3 = unsigned 4294967293 = hex fffffffd
- * 0 message(s)
- * 0 message(s) with %
- * justif: "left      "
- * justif: "     right"
- *  3: 0003 zero padded
- *  3: 3    left justif.
- *  3:    3 right justif.
- * -3: -003 zero padded
- * -3: -3   left justif.
- * -3:   -3 right justif.
- */
-
-#endif