| 1 | /* $NetBSD: printf.c,v 1.31 2005/03/22 23:55:46 dsl Exp $ */
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| 2 |
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| 3 | /*
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| 4 | * Copyright (c) 1989, 1993
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| 5 | * The Regents of the University of California. All rights reserved.
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| 6 | *
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| 7 | * Redistribution and use in source and binary forms, with or without
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| 8 | * modification, are permitted provided that the following conditions
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| 9 | * are met:
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| 10 | * 1. Redistributions of source code must retain the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer.
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| 12 | * 2. Redistributions in binary form must reproduce the above copyright
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| 13 | * notice, this list of conditions and the following disclaimer in the
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| 14 | * documentation and/or other materials provided with the distribution.
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| 15 | * 3. Neither the name of the University nor the names of its contributors
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| 16 | * may be used to endorse or promote products derived from this software
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| 17 | * without specific prior written permission.
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| 18 | *
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| 19 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 29 | * SUCH DAMAGE.
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| 30 | */
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| 31 |
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| 32 | #if 0
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| 33 | #if !defined(BUILTIN) && !defined(SHELL)
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| 34 | __COPYRIGHT("@(#) Copyright (c) 1989, 1993\n\
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| 35 | The Regents of the University of California. All rights reserved.\n");
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| 36 | #endif
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| 37 | #ifndef lint
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| 38 | static char sccsid[] = "@(#)printf.c 8.2 (Berkeley) 3/22/95";
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| 39 | #else
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| 40 | __RCSID("$NetBSD: printf.c,v 1.31 2005/03/22 23:55:46 dsl Exp $");
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| 41 | #endif /* not lint */
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| 42 | #endif
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| 43 |
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| 44 | #include <sys/types.h>
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| 45 |
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| 46 | #include <ctype.h>
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| 47 | #include <err.h>
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| 48 | #include <errno.h>
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| 49 | #include <inttypes.h>
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| 50 | #include <limits.h>
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| 51 | #include <locale.h>
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| 52 | #include <stdarg.h>
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| 53 | #include <stdio.h>
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| 54 | #include <stdlib.h>
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| 55 | #include <string.h>
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| 56 | #include <unistd.h>
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| 57 |
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| 58 | #ifdef __GNUC__
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| 59 | #define ESCAPE '\e'
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| 60 | #else
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| 61 | #define ESCAPE 033
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| 62 | #endif
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| 63 |
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| 64 | static void conv_escape_str(char *, void (*)(int));
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| 65 | static char *conv_escape(char *, char *);
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| 66 | static char *conv_expand(const char *);
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| 67 | static int getchr(void);
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| 68 | static double getdouble(void);
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| 69 | static int getwidth(void);
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| 70 | static intmax_t getintmax(void);
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| 71 | static uintmax_t getuintmax(void);
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| 72 | static char *getstr(void);
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| 73 | static char *mklong(const char *, int);
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| 74 | static void check_conversion(const char *, const char *);
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| 75 | static void usage(void);
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| 76 |
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| 77 | static void b_count(int);
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| 78 | static void b_output(int);
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| 79 | static size_t b_length;
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| 80 | static char *b_fmt;
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| 81 |
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| 82 | static int rval;
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| 83 | static char **gargv;
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| 84 |
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| 85 | #ifdef BUILTIN /* csh builtin */
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| 86 | #define main progprintf
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| 87 | #endif
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| 88 |
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| 89 | #ifdef SHELL /* sh (aka ash) builtin */
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| 90 | #define main printfcmd
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| 91 | #include "../../bin/sh/bltin/bltin.h"
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| 92 | #endif /* SHELL */
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| 93 |
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| 94 | #define PF(f, func) { \
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| 95 | if (fieldwidth != -1) { \
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| 96 | if (precision != -1) \
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| 97 | (void)printf(f, fieldwidth, precision, func); \
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| 98 | else \
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| 99 | (void)printf(f, fieldwidth, func); \
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| 100 | } else if (precision != -1) \
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| 101 | (void)printf(f, precision, func); \
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| 102 | else \
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| 103 | (void)printf(f, func); \
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| 104 | }
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| 105 |
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| 106 | #define APF(cpp, f, func) { \
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| 107 | if (fieldwidth != -1) { \
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| 108 | if (precision != -1) \
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| 109 | (void)asprintf(cpp, f, fieldwidth, precision, func); \
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| 110 | else \
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| 111 | (void)asprintf(cpp, f, fieldwidth, func); \
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| 112 | } else if (precision != -1) \
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| 113 | (void)asprintf(cpp, f, precision, func); \
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| 114 | else \
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| 115 | (void)asprintf(cpp, f, func); \
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| 116 | }
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| 117 |
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| 118 | int main(int, char **);
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| 119 | int main(int argc, char *argv[])
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| 120 | {
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| 121 | char *fmt, *start;
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| 122 | int fieldwidth, precision;
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| 123 | char nextch;
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| 124 | char *format;
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| 125 | int ch;
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| 126 |
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| 127 | #if !defined(SHELL) && !defined(BUILTIN)
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| 128 | (void)setlocale (LC_ALL, "");
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| 129 | #endif
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| 130 |
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| 131 | while ((ch = getopt(argc, argv, "")) != -1) {
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| 132 | switch (ch) {
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| 133 | case '?':
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| 134 | default:
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| 135 | usage();
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| 136 | return 1;
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| 137 | }
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| 138 | }
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| 139 | argc -= optind;
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| 140 | argv += optind;
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| 141 |
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| 142 | if (argc < 1) {
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| 143 | usage();
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| 144 | return 1;
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| 145 | }
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| 146 |
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| 147 | format = *argv;
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| 148 | gargv = ++argv;
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| 149 |
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| 150 | #define SKIP1 "#-+ 0"
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| 151 | #define SKIP2 "*0123456789"
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| 152 | do {
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| 153 | /*
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| 154 | * Basic algorithm is to scan the format string for conversion
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| 155 | * specifications -- once one is found, find out if the field
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| 156 | * width or precision is a '*'; if it is, gather up value.
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| 157 | * Note, format strings are reused as necessary to use up the
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| 158 | * provided arguments, arguments of zero/null string are
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| 159 | * provided to use up the format string.
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| 160 | */
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| 161 |
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| 162 | /* find next format specification */
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| 163 | for (fmt = format; (ch = *fmt++) != '\0';) {
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| 164 | if (ch == '\\') {
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| 165 | char c_ch;
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| 166 | fmt = conv_escape(fmt, &c_ch);
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| 167 | putchar(c_ch);
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| 168 | continue;
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| 169 | }
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| 170 | if (ch != '%' || (*fmt == '%' && ++fmt)) {
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| 171 | (void)putchar(ch);
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| 172 | continue;
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| 173 | }
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| 174 |
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| 175 | /* Ok - we've found a format specification,
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| 176 | Save its address for a later printf(). */
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| 177 | start = fmt - 1;
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| 178 |
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| 179 | /* skip to field width */
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| 180 | fmt += strspn(fmt, SKIP1);
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| 181 | fieldwidth = *fmt == '*' ? getwidth() : -1;
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| 182 |
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| 183 | /* skip to possible '.', get following precision */
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| 184 | fmt += strspn(fmt, SKIP2);
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| 185 | if (*fmt == '.')
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| 186 | ++fmt;
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| 187 | precision = *fmt == '*' ? getwidth() : -1;
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| 188 |
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| 189 | fmt += strspn(fmt, SKIP2);
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| 190 |
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| 191 | ch = *fmt;
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| 192 | if (!ch) {
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| 193 | warnx("missing format character");
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| 194 | return (1);
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| 195 | }
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| 196 | /* null terminate format string to we can use it
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| 197 | as an argument to printf. */
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| 198 | nextch = fmt[1];
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| 199 | fmt[1] = 0;
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| 200 | switch (ch) {
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| 201 |
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| 202 | case 'B': {
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| 203 | const char *p = conv_expand(getstr());
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| 204 | *fmt = 's';
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| 205 | PF(start, p);
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| 206 | break;
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| 207 | }
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| 208 | case 'b': {
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| 209 | /* There has to be a better way to do this,
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| 210 | * but the string we generate might have
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| 211 | * embedded nulls. */
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| 212 | static char *a, *t;
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| 213 | char *cp = getstr();
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| 214 | /* Free on entry in case shell longjumped out */
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| 215 | if (a != NULL)
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| 216 | free(a);
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| 217 | a = NULL;
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| 218 | if (t != NULL)
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| 219 | free(t);
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| 220 | t = NULL;
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| 221 | /* Count number of bytes we want to output */
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| 222 | b_length = 0;
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| 223 | conv_escape_str(cp, b_count);
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| 224 | t = malloc(b_length + 1);
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| 225 | if (t == NULL)
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| 226 | break;
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| 227 | memset(t, 'x', b_length);
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| 228 | t[b_length] = 0;
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| 229 | /* Get printf to calculate the lengths */
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| 230 | *fmt = 's';
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| 231 | APF(&a, start, t);
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| 232 | b_fmt = a;
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| 233 | /* Output leading spaces and data bytes */
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| 234 | conv_escape_str(cp, b_output);
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| 235 | /* Add any trailing spaces */
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| 236 | printf("%s", b_fmt);
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| 237 | break;
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| 238 | }
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| 239 | case 'c': {
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| 240 | char p = getchr();
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| 241 | PF(start, p);
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| 242 | break;
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| 243 | }
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| 244 | case 's': {
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| 245 | char *p = getstr();
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| 246 | PF(start, p);
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| 247 | break;
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| 248 | }
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| 249 | case 'd':
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| 250 | case 'i': {
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| 251 | intmax_t p = getintmax();
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| 252 | char *f = mklong(start, ch);
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| 253 | PF(f, p);
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| 254 | break;
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| 255 | }
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| 256 | case 'o':
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| 257 | case 'u':
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| 258 | case 'x':
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| 259 | case 'X': {
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| 260 | uintmax_t p = getuintmax();
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| 261 | char *f = mklong(start, ch);
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| 262 | PF(f, p);
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| 263 | break;
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| 264 | }
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| 265 | case 'e':
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| 266 | case 'E':
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| 267 | case 'f':
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| 268 | case 'g':
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| 269 | case 'G': {
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| 270 | double p = getdouble();
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| 271 | PF(start, p);
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| 272 | break;
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| 273 | }
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| 274 | default:
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| 275 | warnx("%s: invalid directive", start);
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| 276 | return 1;
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| 277 | }
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| 278 | *fmt++ = ch;
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| 279 | *fmt = nextch;
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| 280 | /* escape if a \c was encountered */
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| 281 | if (rval & 0x100)
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| 282 | return rval & ~0x100;
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| 283 | }
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| 284 | } while (gargv != argv && *gargv);
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| 285 |
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| 286 | return rval;
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| 287 | }
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| 288 |
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| 289 | /* helper functions for conv_escape_str */
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| 290 |
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| 291 | static void
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| 292 | /*ARGSUSED*/
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| 293 | b_count(int ch)
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| 294 | {
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| 295 | b_length++;
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| 296 | }
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| 297 |
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| 298 | /* Output one converted character for every 'x' in the 'format' */
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| 299 |
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| 300 | static void
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| 301 | b_output(int ch)
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| 302 | {
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| 303 | for (;;) {
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| 304 | switch (*b_fmt++) {
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| 305 | case 0:
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| 306 | b_fmt--;
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| 307 | return;
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| 308 | case ' ':
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| 309 | putchar(' ');
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| 310 | break;
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| 311 | default:
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| 312 | putchar(ch);
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| 313 | return;
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| 314 | }
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| 315 | }
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| 316 | }
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| 317 |
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| 318 |
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| 319 | /*
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| 320 | * Print SysV echo(1) style escape string
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| 321 | * Halts processing string if a \c escape is encountered.
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| 322 | */
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| 323 | static void
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| 324 | conv_escape_str(char *str, void (*do_putchar)(int))
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| 325 | {
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| 326 | int value;
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| 327 | int ch;
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| 328 | char c;
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| 329 |
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| 330 | while ((ch = *str++) != '\0') {
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| 331 | if (ch != '\\') {
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| 332 | do_putchar(ch);
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| 333 | continue;
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| 334 | }
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| 335 |
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| 336 | ch = *str++;
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| 337 | if (ch == 'c') {
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| 338 | /* \c as in SYSV echo - abort all processing.... */
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| 339 | rval |= 0x100;
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| 340 | break;
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| 341 | }
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| 342 |
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| 343 | /*
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| 344 | * %b string octal constants are not like those in C.
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| 345 | * They start with a \0, and are followed by 0, 1, 2,
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| 346 | * or 3 octal digits.
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| 347 | */
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| 348 | if (ch == '0') {
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| 349 | int octnum = 0, i;
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| 350 | for (i = 0; i < 3; i++) {
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| 351 | if (!isdigit((unsigned char)*str) || *str > '7')
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| 352 | break;
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| 353 | octnum = (octnum << 3) | (*str++ - '0');
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| 354 | }
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| 355 | do_putchar(octnum);
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| 356 | continue;
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| 357 | }
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| 358 |
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| 359 | /* \[M][^|-]C as defined by vis(3) */
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| 360 | if (ch == 'M' && *str == '-') {
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| 361 | do_putchar(0200 | str[1]);
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| 362 | str += 2;
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| 363 | continue;
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| 364 | }
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| 365 | if (ch == 'M' && *str == '^') {
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| 366 | str++;
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| 367 | value = 0200;
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| 368 | ch = '^';
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| 369 | } else
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| 370 | value = 0;
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| 371 | if (ch == '^') {
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| 372 | ch = *str++;
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| 373 | if (ch == '?')
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| 374 | value |= 0177;
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| 375 | else
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| 376 | value |= ch & 037;
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| 377 | do_putchar(value);
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| 378 | continue;
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| 379 | }
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| 380 |
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| 381 | /* Finally test for sequences valid in the format string */
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| 382 | str = conv_escape(str - 1, &c);
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| 383 | do_putchar(c);
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| 384 | }
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| 385 | }
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| 386 |
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| 387 | /*
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| 388 | * Print "standard" escape characters
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| 389 | */
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| 390 | static char *
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| 391 | conv_escape(char *str, char *conv_ch)
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| 392 | {
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| 393 | int value;
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| 394 | int ch;
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| 395 | char num_buf[4], *num_end;
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| 396 |
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| 397 | ch = *str++;
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| 398 |
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| 399 | switch (ch) {
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| 400 | case '0': case '1': case '2': case '3':
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| 401 | case '4': case '5': case '6': case '7':
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| 402 | num_buf[0] = ch;
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| 403 | ch = str[0];
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| 404 | num_buf[1] = ch;
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| 405 | num_buf[2] = ch ? str[1] : 0;
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| 406 | num_buf[3] = 0;
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| 407 | value = strtoul(num_buf, &num_end, 8);
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| 408 | str += num_end - (num_buf + 1);
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| 409 | break;
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| 410 |
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| 411 | case 'x':
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| 412 | /* Hexadecimal character constants are not required to be
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| 413 | supported (by SuS v1) because there is no consistent
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| 414 | way to detect the end of the constant.
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| 415 | Supporting 2 byte constants is a compromise. */
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| 416 | ch = str[0];
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| 417 | num_buf[0] = ch;
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| 418 | num_buf[1] = ch ? str[1] : 0;
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| 419 | num_buf[2] = 0;
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| 420 | value = strtoul(num_buf, &num_end, 16);
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| 421 | str += num_end - num_buf;
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| 422 | break;
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| 423 |
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| 424 | case '\\': value = '\\'; break; /* backslash */
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| 425 | case '\'': value = '\''; break; /* single quote */
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| 426 | case '"': value = '"'; break; /* double quote */
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| 427 | case 'a': value = '\a'; break; /* alert */
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| 428 | case 'b': value = '\b'; break; /* backspace */
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| 429 | case 'e': value = ESCAPE; break; /* escape */
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| 430 | case 'f': value = '\f'; break; /* form-feed */
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| 431 | case 'n': value = '\n'; break; /* newline */
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| 432 | case 'r': value = '\r'; break; /* carriage-return */
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| 433 | case 't': value = '\t'; break; /* tab */
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| 434 | case 'v': value = '\v'; break; /* vertical-tab */
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| 435 |
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| 436 | default:
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| 437 | warnx("unknown escape sequence `\\%c'", ch);
|
|---|
| 438 | rval = 1;
|
|---|
| 439 | value = ch;
|
|---|
| 440 | break;
|
|---|
| 441 | }
|
|---|
| 442 |
|
|---|
| 443 | *conv_ch = value;
|
|---|
| 444 | return str;
|
|---|
| 445 | }
|
|---|
| 446 |
|
|---|
| 447 | /* expand a string so that everything is printable */
|
|---|
| 448 |
|
|---|
| 449 | static char *
|
|---|
| 450 | conv_expand(const char *str)
|
|---|
| 451 | {
|
|---|
| 452 | static char *conv_str;
|
|---|
| 453 | static char no_memory[] = "<no memory>";
|
|---|
| 454 | char *cp;
|
|---|
| 455 | int ch;
|
|---|
| 456 |
|
|---|
| 457 | if (conv_str)
|
|---|
| 458 | free(conv_str);
|
|---|
| 459 | /* get a buffer that is definitely large enough.... */
|
|---|
| 460 | conv_str = malloc(4 * strlen(str) + 1);
|
|---|
| 461 | if (!conv_str)
|
|---|
| 462 | return no_memory;
|
|---|
| 463 | cp = conv_str;
|
|---|
| 464 |
|
|---|
| 465 | while ((ch = *(const unsigned char *)str++) != '\0') {
|
|---|
| 466 | switch (ch) {
|
|---|
| 467 | /* Use C escapes for expected control characters */
|
|---|
| 468 | case '\\': ch = '\\'; break; /* backslash */
|
|---|
| 469 | case '\'': ch = '\''; break; /* single quote */
|
|---|
| 470 | case '"': ch = '"'; break; /* double quote */
|
|---|
| 471 | case '\a': ch = 'a'; break; /* alert */
|
|---|
| 472 | case '\b': ch = 'b'; break; /* backspace */
|
|---|
| 473 | case ESCAPE: ch = 'e'; break; /* escape */
|
|---|
| 474 | case '\f': ch = 'f'; break; /* form-feed */
|
|---|
| 475 | case '\n': ch = 'n'; break; /* newline */
|
|---|
| 476 | case '\r': ch = 'r'; break; /* carriage-return */
|
|---|
| 477 | case '\t': ch = 't'; break; /* tab */
|
|---|
| 478 | case '\v': ch = 'v'; break; /* vertical-tab */
|
|---|
| 479 | default:
|
|---|
| 480 | /* Copy anything printable */
|
|---|
| 481 | if (isprint(ch)) {
|
|---|
| 482 | *cp++ = ch;
|
|---|
| 483 | continue;
|
|---|
| 484 | }
|
|---|
| 485 | /* Use vis(3) encodings for the rest */
|
|---|
| 486 | *cp++ = '\\';
|
|---|
| 487 | if (ch & 0200) {
|
|---|
| 488 | *cp++ = 'M';
|
|---|
| 489 | ch &= ~0200;
|
|---|
| 490 | }
|
|---|
| 491 | if (ch == 0177) {
|
|---|
| 492 | *cp++ = '^';
|
|---|
| 493 | *cp++ = '?';
|
|---|
| 494 | continue;
|
|---|
| 495 | }
|
|---|
| 496 | if (ch < 040) {
|
|---|
| 497 | *cp++ = '^';
|
|---|
| 498 | *cp++ = ch | 0100;
|
|---|
| 499 | continue;
|
|---|
| 500 | }
|
|---|
| 501 | *cp++ = '-';
|
|---|
| 502 | *cp++ = ch;
|
|---|
| 503 | continue;
|
|---|
| 504 | }
|
|---|
| 505 | *cp++ = '\\';
|
|---|
| 506 | *cp++ = ch;
|
|---|
| 507 | }
|
|---|
| 508 |
|
|---|
| 509 | *cp = 0;
|
|---|
| 510 | return conv_str;
|
|---|
| 511 | }
|
|---|
| 512 |
|
|---|
| 513 | static char *
|
|---|
| 514 | mklong(const char *str, int ch)
|
|---|
| 515 | {
|
|---|
| 516 | static char copy[64];
|
|---|
| 517 | size_t len;
|
|---|
| 518 |
|
|---|
| 519 | len = strlen(str) + 2;
|
|---|
| 520 | if (len > sizeof copy) {
|
|---|
| 521 | warnx("format %s too complex\n", str);
|
|---|
| 522 | len = 4;
|
|---|
| 523 | }
|
|---|
| 524 | (void)memmove(copy, str, len - 3);
|
|---|
| 525 | copy[len - 3] = 'j';
|
|---|
| 526 | copy[len - 2] = ch;
|
|---|
| 527 | copy[len - 1] = '\0';
|
|---|
| 528 | return copy;
|
|---|
| 529 | }
|
|---|
| 530 |
|
|---|
| 531 | static int
|
|---|
| 532 | getchr(void)
|
|---|
| 533 | {
|
|---|
| 534 | if (!*gargv)
|
|---|
| 535 | return 0;
|
|---|
| 536 | return (int)**gargv++;
|
|---|
| 537 | }
|
|---|
| 538 |
|
|---|
| 539 | static char *
|
|---|
| 540 | getstr(void)
|
|---|
| 541 | {
|
|---|
| 542 | static char empty[] = "";
|
|---|
| 543 | if (!*gargv)
|
|---|
| 544 | return empty;
|
|---|
| 545 | return *gargv++;
|
|---|
| 546 | }
|
|---|
| 547 |
|
|---|
| 548 | static int
|
|---|
| 549 | getwidth(void)
|
|---|
| 550 | {
|
|---|
| 551 | long val;
|
|---|
| 552 | char *s, *ep;
|
|---|
| 553 |
|
|---|
| 554 | s = *gargv;
|
|---|
| 555 | if (!*gargv)
|
|---|
| 556 | return (0);
|
|---|
| 557 | gargv++;
|
|---|
| 558 |
|
|---|
| 559 | errno = 0;
|
|---|
| 560 | val = strtoul(s, &ep, 0);
|
|---|
| 561 | check_conversion(s, ep);
|
|---|
| 562 |
|
|---|
| 563 | /* Arbitrarily 'restrict' field widths to 1Mbyte */
|
|---|
| 564 | if (val < 0 || val > 1 << 20) {
|
|---|
| 565 | warnx("%s: invalid field width", s);
|
|---|
| 566 | return 0;
|
|---|
| 567 | }
|
|---|
| 568 |
|
|---|
| 569 | return val;
|
|---|
| 570 | }
|
|---|
| 571 |
|
|---|
| 572 | static intmax_t
|
|---|
| 573 | getintmax(void)
|
|---|
| 574 | {
|
|---|
| 575 | intmax_t val;
|
|---|
| 576 | char *cp, *ep;
|
|---|
| 577 |
|
|---|
| 578 | cp = *gargv;
|
|---|
| 579 | if (cp == NULL)
|
|---|
| 580 | return 0;
|
|---|
| 581 | gargv++;
|
|---|
| 582 |
|
|---|
| 583 | if (*cp == '\"' || *cp == '\'')
|
|---|
| 584 | return *(cp+1);
|
|---|
| 585 |
|
|---|
| 586 | errno = 0;
|
|---|
| 587 | val = strtoimax(cp, &ep, 0);
|
|---|
| 588 | check_conversion(cp, ep);
|
|---|
| 589 | return val;
|
|---|
| 590 | }
|
|---|
| 591 |
|
|---|
| 592 | static uintmax_t
|
|---|
| 593 | getuintmax(void)
|
|---|
| 594 | {
|
|---|
| 595 | uintmax_t val;
|
|---|
| 596 | char *cp, *ep;
|
|---|
| 597 |
|
|---|
| 598 | cp = *gargv;
|
|---|
| 599 | if (cp == NULL)
|
|---|
| 600 | return 0;
|
|---|
| 601 | gargv++;
|
|---|
| 602 |
|
|---|
| 603 | if (*cp == '\"' || *cp == '\'')
|
|---|
| 604 | return *(cp + 1);
|
|---|
| 605 |
|
|---|
| 606 | /* strtoumax won't error -ve values */
|
|---|
| 607 | while (isspace(*(unsigned char *)cp))
|
|---|
| 608 | cp++;
|
|---|
| 609 | if (*cp == '-') {
|
|---|
| 610 | warnx("%s: expected positive numeric value", cp);
|
|---|
| 611 | rval = 1;
|
|---|
| 612 | return 0;
|
|---|
| 613 | }
|
|---|
| 614 |
|
|---|
| 615 | errno = 0;
|
|---|
| 616 | val = strtoumax(cp, &ep, 0);
|
|---|
| 617 | check_conversion(cp, ep);
|
|---|
| 618 | return val;
|
|---|
| 619 | }
|
|---|
| 620 |
|
|---|
| 621 | static double
|
|---|
| 622 | getdouble(void)
|
|---|
| 623 | {
|
|---|
| 624 | double val;
|
|---|
| 625 | char *ep;
|
|---|
| 626 |
|
|---|
| 627 | if (!*gargv)
|
|---|
| 628 | return (0.0);
|
|---|
| 629 |
|
|---|
| 630 | if (**gargv == '\"' || **gargv == '\'')
|
|---|
| 631 | return (double) *((*gargv++)+1);
|
|---|
| 632 |
|
|---|
| 633 | errno = 0;
|
|---|
| 634 | val = strtod(*gargv, &ep);
|
|---|
| 635 | check_conversion(*gargv++, ep);
|
|---|
| 636 | return val;
|
|---|
| 637 | }
|
|---|
| 638 |
|
|---|
| 639 | static void
|
|---|
| 640 | check_conversion(const char *s, const char *ep)
|
|---|
| 641 | {
|
|---|
| 642 | if (*ep) {
|
|---|
| 643 | if (ep == s)
|
|---|
| 644 | warnx("%s: expected numeric value", s);
|
|---|
| 645 | else
|
|---|
| 646 | warnx("%s: not completely converted", s);
|
|---|
| 647 | rval = 1;
|
|---|
| 648 | } else if (errno == ERANGE) {
|
|---|
| 649 | warnx("%s: %s", s, strerror(ERANGE));
|
|---|
| 650 | rval = 1;
|
|---|
| 651 | }
|
|---|
| 652 | }
|
|---|
| 653 |
|
|---|
| 654 | static void
|
|---|
| 655 | usage(void)
|
|---|
| 656 | {
|
|---|
| 657 | (void)fprintf(stderr, "Usage: %s format [arg ...]\n", getprogname());
|
|---|
| 658 | }
|
|---|
