From 8c59a0bf0e9e2d87b0ff273ea3f0bf05bbbf6373 Mon Sep 17 00:00:00 2001
From: nobody
Date: Wed, 13 Oct 2004 09:42:10 +0000
Subject: This commit was manufactured by cvs2svn to create tag 'busybox_1_00'.
---
busybox/coreutils/printf.c | 316 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 316 insertions(+)
create mode 100644 busybox/coreutils/printf.c
(limited to 'busybox/coreutils/printf.c')
diff --git a/busybox/coreutils/printf.c b/busybox/coreutils/printf.c
new file mode 100644
index 0000000..da5e46a
--- /dev/null
+++ b/busybox/coreutils/printf.c
@@ -0,0 +1,316 @@
+/* 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);
+ }
+
+ }
+}
--
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