This commit was manufactured by cvs2svn to create tag 'busybox_1_00'.

1 files changed, 316 insertions, 0 deletions

diff --git a/busybox/coreutils/printf.c b/busybox/coreutils/printf.c
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+/* vi: set sw=4 ts=4: */
+/* printf - format and print data
+   Copyright (C) 90, 91, 92, 93, 94, 95, 1996 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, 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 General Public License for more details.
+
+   You should have received a copy of the GNU 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.  */
+
+/* Usage: printf format [argument...]
+
+   A front end to the printf function that lets it be used from the shell.
+
+   Backslash escapes:
+
+   \" = double quote
+   \\ = backslash
+   \a = alert (bell)
+   \b = backspace
+   \c = produce no further output
+   \f = form feed
+   \n = new line
+   \r = carriage return
+   \t = horizontal tab
+   \v = vertical tab
+   \0ooo = octal number (ooo is 0 to 3 digits)
+   \xhhh = hexadecimal number (hhh is 1 to 3 digits)
+
+   Additional directive:
+
+   %b = print an argument string, interpreting backslash escapes
+
+   The `format' argument is re-used as many times as necessary
+   to convert all of the given arguments.
+
+   David MacKenzie <djm@gnu.ai.mit.edu> */
+
+
+//   19990508 Busy Boxed! Dave Cinege
+
+#include <unistd.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <string.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <assert.h>
+#include "busybox.h"
+
+static double xstrtod __P((char *s));
+static long xstrtol __P((char *s));
+static unsigned long xstrtoul __P((char *s));
+static void print_esc_string __P((char *str));
+static int print_formatted __P((char *format, int argc, char **argv));
+static void print_direc __P( (char *start, size_t length,
+			int field_width, int precision, char *argument));
+
+int printf_main(int argc, char **argv)
+{
+	char *format;
+	int args_used;
+
+	if (argc <= 1 || **(argv + 1) == '-') {
+		bb_show_usage();
+	}
+
+	format = argv[1];
+	argc -= 2;
+	argv += 2;
+
+	do {
+		args_used = print_formatted(format, argc, argv);
+		argc -= args_used;
+		argv += args_used;
+	}
+	while (args_used > 0 && argc > 0);
+
+/*
+  if (argc > 0)
+    fprintf(stderr, "excess args ignored");
+*/
+
+	return EXIT_SUCCESS;
+}
+
+/* Print the text in FORMAT, using ARGV (with ARGC elements) for
+   arguments to any `%' directives.
+   Return the number of elements of ARGV used.  */
+
+static int print_formatted(char *format, int argc, char **argv)
+{
+	int save_argc = argc;		/* Preserve original value.  */
+	char *f;					/* Pointer into `format'.  */
+	char *direc_start;			/* Start of % directive.  */
+	size_t direc_length;		/* Length of % directive.  */
+	int field_width;			/* Arg to first '*', or -1 if none.  */
+	int precision;				/* Arg to second '*', or -1 if none.  */
+
+	for (f = format; *f; ++f) {
+		switch (*f) {
+		case '%':
+			direc_start = f++;
+			direc_length = 1;
+			field_width = precision = -1;
+			if (*f == '%') {
+				putchar('%');
+				break;
+			}
+			if (*f == 'b') {
+				if (argc > 0) {
+					print_esc_string(*argv);
+					++argv;
+					--argc;
+				}
+				break;
+			}
+			if (strchr("-+ #", *f)) {
+				++f;
+				++direc_length;
+			}
+			if (*f == '*') {
+				++f;
+				++direc_length;
+				if (argc > 0) {
+					field_width = xstrtoul(*argv);
+					++argv;
+					--argc;
+				} else
+					field_width = 0;
+			} else
+				while (isdigit(*f)) {
+					++f;
+					++direc_length;
+				}
+			if (*f == '.') {
+				++f;
+				++direc_length;
+				if (*f == '*') {
+					++f;
+					++direc_length;
+					if (argc > 0) {
+						precision = xstrtoul(*argv);
+						++argv;
+						--argc;
+					} else
+						precision = 0;
+				} else
+					while (isdigit(*f)) {
+						++f;
+						++direc_length;
+					}
+			}
+			if (*f == 'l' || *f == 'L' || *f == 'h') {
+				++f;
+				++direc_length;
+			}
+			/*
+			   if (!strchr ("diouxXfeEgGcs", *f))
+			   fprintf(stderr, "%%%c: invalid directive", *f);
+			 */
+			++direc_length;
+			if (argc > 0) {
+				print_direc(direc_start, direc_length, field_width,
+							precision, *argv);
+				++argv;
+				--argc;
+			} else
+				print_direc(direc_start, direc_length, field_width,
+							precision, "");
+			break;
+
+		case '\\':
+			if (*++f == 'c')
+				exit(0);
+			putchar(bb_process_escape_sequence((const char **)&f));
+			f--;
+			break;
+
+		default:
+			putchar(*f);
+		}
+	}
+
+	return save_argc - argc;
+}
+
+static void
+print_direc(char *start, size_t length, int field_width, int precision,
+			char *argument)
+{
+	char *p;					/* Null-terminated copy of % directive. */
+
+	p = xmalloc((unsigned) (length + 1));
+	strncpy(p, start, length);
+	p[length] = 0;
+
+	switch (p[length - 1]) {
+	case 'd':
+	case 'i':
+		if (field_width < 0) {
+			if (precision < 0)
+				printf(p, xstrtol(argument));
+			else
+				printf(p, precision, xstrtol(argument));
+		} else {
+			if (precision < 0)
+				printf(p, field_width, xstrtol(argument));
+			else
+				printf(p, field_width, precision, xstrtol(argument));
+		}
+		break;
+
+	case 'o':
+	case 'u':
+	case 'x':
+	case 'X':
+		if (field_width < 0) {
+			if (precision < 0)
+				printf(p, xstrtoul(argument));
+			else
+				printf(p, precision, xstrtoul(argument));
+		} else {
+			if (precision < 0)
+				printf(p, field_width, xstrtoul(argument));
+			else
+				printf(p, field_width, precision, xstrtoul(argument));
+		}
+		break;
+
+	case 'f':
+	case 'e':
+	case 'E':
+	case 'g':
+	case 'G':
+		if (field_width < 0) {
+			if (precision < 0)
+				printf(p, xstrtod(argument));
+			else
+				printf(p, precision, xstrtod(argument));
+		} else {
+			if (precision < 0)
+				printf(p, field_width, xstrtod(argument));
+			else
+				printf(p, field_width, precision, xstrtod(argument));
+		}
+		break;
+
+	case 'c':
+		printf(p, *argument);
+		break;
+
+	case 's':
+		if (field_width < 0) {
+			if (precision < 0)
+				printf(p, argument);
+			else
+				printf(p, precision, argument);
+		} else {
+			if (precision < 0)
+				printf(p, field_width, argument);
+			else
+				printf(p, field_width, precision, argument);
+		}
+		break;
+	}
+
+	free(p);
+}
+
+static unsigned long xstrtoul(char *arg)
+{
+	unsigned long result;
+	if (safe_strtoul(arg, &result))
+		fprintf(stderr, "%s", arg);
+	return result;
+}
+
+static long xstrtol(char *arg)
+{
+	long result;
+	if (safe_strtol(arg, &result))
+		fprintf(stderr, "%s", arg);
+	return result;
+}
+
+static double xstrtod(char *arg)
+{
+	double result;
+	if (safe_strtod(arg, &result))
+		fprintf(stderr, "%s", arg);
+	return result;
+}
+
+static void print_esc_string(char *str)
+{
+	for (; *str; str++) {
+		if (*str == '\\') {
+			str++;
+			putchar(bb_process_escape_sequence((const char **)&str));
+		} else {
+			putchar(*str);
+		}
+
+	}
+}