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-rw-r--r--src/kash/bltin/printf.c659
1 files changed, 659 insertions, 0 deletions
diff --git a/src/kash/bltin/printf.c b/src/kash/bltin/printf.c
new file mode 100644
index 0000000..4a6a952
--- /dev/null
+++ b/src/kash/bltin/printf.c
@@ -0,0 +1,659 @@
+/* $NetBSD: printf.c,v 1.31 2005/03/22 23:55:46 dsl Exp $ */
+
+/*
+ * Copyright (c) 1989, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if 0
+#if !defined(BUILTIN) && !defined(SHELL)
+__COPYRIGHT("@(#) Copyright (c) 1989, 1993\n\
+ The Regents of the University of California. All rights reserved.\n");
+#endif
+#ifndef lint
+static char sccsid[] = "@(#)printf.c 8.2 (Berkeley) 3/22/95";
+#else
+__RCSID("$NetBSD: printf.c,v 1.31 2005/03/22 23:55:46 dsl Exp $");
+#endif /* not lint */
+#endif
+
+#include <sys/types.h>
+
+#include <ctype.h>
+#include <err.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <locale.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "shinstance.h"
+
+#ifdef __GNUC__
+#define ESCAPE '\e'
+#else
+#define ESCAPE 033
+#endif
+
+static void conv_escape_str(char *, void (*)(int));
+static char *conv_escape(char *, char *);
+static char *conv_expand(const char *);
+static int getchr(void);
+static double getdouble(void);
+static int getwidth(void);
+static intmax_t getintmax(void);
+static uintmax_t getuintmax(void);
+static char *getstr(void);
+static char *mklong(const char *, int);
+static void check_conversion(const char *, const char *);
+static void usage(void);
+
+static void b_count(int);
+static void b_output(int);
+static size_t b_length;
+static char *b_fmt;
+
+static int rval;
+static char **gargv;
+
+#ifdef BUILTIN /* csh builtin */
+#define main progprintf
+#endif
+
+#ifdef SHELL /* sh (aka ash) builtin */
+#define main printfcmd
+#include "../../bin/sh/bltin/bltin.h"
+#endif /* SHELL */
+
+#define PF(f, func) { \
+ if (fieldwidth != -1) { \
+ if (precision != -1) \
+ (void)printf(f, fieldwidth, precision, func); \
+ else \
+ (void)printf(f, fieldwidth, func); \
+ } else if (precision != -1) \
+ (void)printf(f, precision, func); \
+ else \
+ (void)printf(f, func); \
+}
+
+#define APF(cpp, f, func) { \
+ if (fieldwidth != -1) { \
+ if (precision != -1) \
+ (void)asprintf(cpp, f, fieldwidth, precision, func); \
+ else \
+ (void)asprintf(cpp, f, fieldwidth, func); \
+ } else if (precision != -1) \
+ (void)asprintf(cpp, f, precision, func); \
+ else \
+ (void)asprintf(cpp, f, func); \
+}
+
+int main(int, char **);
+int main(int argc, char *argv[])
+{
+ char *fmt, *start;
+ int fieldwidth, precision;
+ char nextch;
+ char *format;
+ int ch;
+
+#if !defined(SHELL) && !defined(BUILTIN)
+ (void)setlocale (LC_ALL, "");
+#endif
+
+ while ((ch = getopt(argc, argv, "")) != -1) {
+ switch (ch) {
+ case '?':
+ default:
+ usage();
+ return 1;
+ }
+ }
+ argc -= optind;
+ argv += optind;
+
+ if (argc < 1) {
+ usage();
+ return 1;
+ }
+
+ format = *argv;
+ gargv = ++argv;
+
+#define SKIP1 "#-+ 0"
+#define SKIP2 "*0123456789"
+ do {
+ /*
+ * Basic algorithm is to scan the format string for conversion
+ * specifications -- once one is found, find out if the field
+ * width or precision is a '*'; if it is, gather up value.
+ * Note, format strings are reused as necessary to use up the
+ * provided arguments, arguments of zero/null string are
+ * provided to use up the format string.
+ */
+
+ /* find next format specification */
+ for (fmt = format; (ch = *fmt++) != '\0';) {
+ if (ch == '\\') {
+ char c_ch;
+ fmt = conv_escape(fmt, &c_ch);
+ putchar(c_ch);
+ continue;
+ }
+ if (ch != '%' || (*fmt == '%' && ++fmt)) {
+ (void)putchar(ch);
+ continue;
+ }
+
+ /* Ok - we've found a format specification,
+ Save its address for a later printf(). */
+ start = fmt - 1;
+
+ /* skip to field width */
+ fmt += strspn(fmt, SKIP1);
+ fieldwidth = *fmt == '*' ? getwidth() : -1;
+
+ /* skip to possible '.', get following precision */
+ fmt += strspn(fmt, SKIP2);
+ if (*fmt == '.')
+ ++fmt;
+ precision = *fmt == '*' ? getwidth() : -1;
+
+ fmt += strspn(fmt, SKIP2);
+
+ ch = *fmt;
+ if (!ch) {
+ warnx("missing format character");
+ return (1);
+ }
+ /* null terminate format string to we can use it
+ as an argument to printf. */
+ nextch = fmt[1];
+ fmt[1] = 0;
+ switch (ch) {
+
+ case 'B': {
+ const char *p = conv_expand(getstr());
+ *fmt = 's';
+ PF(start, p);
+ break;
+ }
+ case 'b': {
+ /* There has to be a better way to do this,
+ * but the string we generate might have
+ * embedded nulls. */
+ static char *a, *t;
+ char *cp = getstr();
+ /* Free on entry in case shell longjumped out */
+ if (a != NULL)
+ free(a);
+ a = NULL;
+ if (t != NULL)
+ free(t);
+ t = NULL;
+ /* Count number of bytes we want to output */
+ b_length = 0;
+ conv_escape_str(cp, b_count);
+ t = malloc(b_length + 1);
+ if (t == NULL)
+ break;
+ memset(t, 'x', b_length);
+ t[b_length] = 0;
+ /* Get printf to calculate the lengths */
+ *fmt = 's';
+ APF(&a, start, t);
+ b_fmt = a;
+ /* Output leading spaces and data bytes */
+ conv_escape_str(cp, b_output);
+ /* Add any trailing spaces */
+ printf("%s", b_fmt);
+ break;
+ }
+ case 'c': {
+ char p = getchr();
+ PF(start, p);
+ break;
+ }
+ case 's': {
+ char *p = getstr();
+ PF(start, p);
+ break;
+ }
+ case 'd':
+ case 'i': {
+ intmax_t p = getintmax();
+ char *f = mklong(start, ch);
+ PF(f, p);
+ break;
+ }
+ case 'o':
+ case 'u':
+ case 'x':
+ case 'X': {
+ uintmax_t p = getuintmax();
+ char *f = mklong(start, ch);
+ PF(f, p);
+ break;
+ }
+ case 'e':
+ case 'E':
+ case 'f':
+ case 'g':
+ case 'G': {
+ double p = getdouble();
+ PF(start, p);
+ break;
+ }
+ default:
+ warnx("%s: invalid directive", start);
+ return 1;
+ }
+ *fmt++ = ch;
+ *fmt = nextch;
+ /* escape if a \c was encountered */
+ if (rval & 0x100)
+ return rval & ~0x100;
+ }
+ } while (gargv != argv && *gargv);
+
+ return rval;
+}
+
+/* helper functions for conv_escape_str */
+
+static void
+/*ARGSUSED*/
+b_count(int ch)
+{
+ b_length++;
+}
+
+/* Output one converted character for every 'x' in the 'format' */
+
+static void
+b_output(int ch)
+{
+ for (;;) {
+ switch (*b_fmt++) {
+ case 0:
+ b_fmt--;
+ return;
+ case ' ':
+ putchar(' ');
+ break;
+ default:
+ putchar(ch);
+ return;
+ }
+ }
+}
+
+
+/*
+ * Print SysV echo(1) style escape string
+ * Halts processing string if a \c escape is encountered.
+ */
+static void
+conv_escape_str(char *str, void (*do_putchar)(int))
+{
+ int value;
+ int ch;
+ char c;
+
+ while ((ch = *str++) != '\0') {
+ if (ch != '\\') {
+ do_putchar(ch);
+ continue;
+ }
+
+ ch = *str++;
+ if (ch == 'c') {
+ /* \c as in SYSV echo - abort all processing.... */
+ rval |= 0x100;
+ break;
+ }
+
+ /*
+ * %b string octal constants are not like those in C.
+ * They start with a \0, and are followed by 0, 1, 2,
+ * or 3 octal digits.
+ */
+ if (ch == '0') {
+ int octnum = 0, i;
+ for (i = 0; i < 3; i++) {
+ if (!isdigit((unsigned char)*str) || *str > '7')
+ break;
+ octnum = (octnum << 3) | (*str++ - '0');
+ }
+ do_putchar(octnum);
+ continue;
+ }
+
+ /* \[M][^|-]C as defined by vis(3) */
+ if (ch == 'M' && *str == '-') {
+ do_putchar(0200 | str[1]);
+ str += 2;
+ continue;
+ }
+ if (ch == 'M' && *str == '^') {
+ str++;
+ value = 0200;
+ ch = '^';
+ } else
+ value = 0;
+ if (ch == '^') {
+ ch = *str++;
+ if (ch == '?')
+ value |= 0177;
+ else
+ value |= ch & 037;
+ do_putchar(value);
+ continue;
+ }
+
+ /* Finally test for sequences valid in the format string */
+ str = conv_escape(str - 1, &c);
+ do_putchar(c);
+ }
+}
+
+/*
+ * Print "standard" escape characters
+ */
+static char *
+conv_escape(char *str, char *conv_ch)
+{
+ int value;
+ int ch;
+ char num_buf[4], *num_end;
+
+ ch = *str++;
+
+ switch (ch) {
+ case '0': case '1': case '2': case '3':
+ case '4': case '5': case '6': case '7':
+ num_buf[0] = ch;
+ ch = str[0];
+ num_buf[1] = ch;
+ num_buf[2] = ch ? str[1] : 0;
+ num_buf[3] = 0;
+ value = strtoul(num_buf, &num_end, 8);
+ str += num_end - (num_buf + 1);
+ break;
+
+ case 'x':
+ /* Hexadecimal character constants are not required to be
+ supported (by SuS v1) because there is no consistent
+ way to detect the end of the constant.
+ Supporting 2 byte constants is a compromise. */
+ ch = str[0];
+ num_buf[0] = ch;
+ num_buf[1] = ch ? str[1] : 0;
+ num_buf[2] = 0;
+ value = strtoul(num_buf, &num_end, 16);
+ str += num_end - num_buf;
+ break;
+
+ case '\\': value = '\\'; break; /* backslash */
+ case '\'': value = '\''; break; /* single quote */
+ case '"': value = '"'; break; /* double quote */
+ case 'a': value = '\a'; break; /* alert */
+ case 'b': value = '\b'; break; /* backspace */
+ case 'e': value = ESCAPE; break; /* escape */
+ case 'f': value = '\f'; break; /* form-feed */
+ case 'n': value = '\n'; break; /* newline */
+ case 'r': value = '\r'; break; /* carriage-return */
+ case 't': value = '\t'; break; /* tab */
+ case 'v': value = '\v'; break; /* vertical-tab */
+
+ default:
+ warnx("unknown escape sequence `\\%c'", ch);
+ rval = 1;
+ value = ch;
+ break;
+ }
+
+ *conv_ch = value;
+ return str;
+}
+
+/* expand a string so that everything is printable */
+
+static char *
+conv_expand(const char *str)
+{
+ static char *conv_str;
+ static char no_memory[] = "<no memory>";
+ char *cp;
+ int ch;
+
+ if (conv_str)
+ free(conv_str);
+ /* get a buffer that is definitely large enough.... */
+ conv_str = malloc(4 * strlen(str) + 1);
+ if (!conv_str)
+ return no_memory;
+ cp = conv_str;
+
+ while ((ch = *(const unsigned char *)str++) != '\0') {
+ switch (ch) {
+ /* Use C escapes for expected control characters */
+ case '\\': ch = '\\'; break; /* backslash */
+ case '\'': ch = '\''; break; /* single quote */
+ case '"': ch = '"'; break; /* double quote */
+ case '\a': ch = 'a'; break; /* alert */
+ case '\b': ch = 'b'; break; /* backspace */
+ case ESCAPE: ch = 'e'; break; /* escape */
+ case '\f': ch = 'f'; break; /* form-feed */
+ case '\n': ch = 'n'; break; /* newline */
+ case '\r': ch = 'r'; break; /* carriage-return */
+ case '\t': ch = 't'; break; /* tab */
+ case '\v': ch = 'v'; break; /* vertical-tab */
+ default:
+ /* Copy anything printable */
+ if (isprint(ch)) {
+ *cp++ = ch;
+ continue;
+ }
+ /* Use vis(3) encodings for the rest */
+ *cp++ = '\\';
+ if (ch & 0200) {
+ *cp++ = 'M';
+ ch &= ~0200;
+ }
+ if (ch == 0177) {
+ *cp++ = '^';
+ *cp++ = '?';
+ continue;
+ }
+ if (ch < 040) {
+ *cp++ = '^';
+ *cp++ = ch | 0100;
+ continue;
+ }
+ *cp++ = '-';
+ *cp++ = ch;
+ continue;
+ }
+ *cp++ = '\\';
+ *cp++ = ch;
+ }
+
+ *cp = 0;
+ return conv_str;
+}
+
+static char *
+mklong(const char *str, int ch)
+{
+ static char copy[64];
+ size_t len;
+
+ len = strlen(str) + 2;
+ if (len > sizeof copy) {
+ warnx("format %s too complex\n", str);
+ len = 4;
+ }
+ (void)memmove(copy, str, len - 3);
+ copy[len - 3] = 'j';
+ copy[len - 2] = ch;
+ copy[len - 1] = '\0';
+ return copy;
+}
+
+static int
+getchr(void)
+{
+ if (!*gargv)
+ return 0;
+ return (int)**gargv++;
+}
+
+static char *
+getstr(void)
+{
+ static char empty[] = "";
+ if (!*gargv)
+ return empty;
+ return *gargv++;
+}
+
+static int
+getwidth(void)
+{
+ long val;
+ char *s, *ep;
+
+ s = *gargv;
+ if (!*gargv)
+ return (0);
+ gargv++;
+
+ errno = 0;
+ val = strtoul(s, &ep, 0);
+ check_conversion(s, ep);
+
+ /* Arbitrarily 'restrict' field widths to 1Mbyte */
+ if (val < 0 || val > 1 << 20) {
+ warnx("%s: invalid field width", s);
+ return 0;
+ }
+
+ return val;
+}
+
+static intmax_t
+getintmax(void)
+{
+ intmax_t val;
+ char *cp, *ep;
+
+ cp = *gargv;
+ if (cp == NULL)
+ return 0;
+ gargv++;
+
+ if (*cp == '\"' || *cp == '\'')
+ return *(cp+1);
+
+ errno = 0;
+ val = strtoimax(cp, &ep, 0);
+ check_conversion(cp, ep);
+ return val;
+}
+
+static uintmax_t
+getuintmax(void)
+{
+ uintmax_t val;
+ char *cp, *ep;
+
+ cp = *gargv;
+ if (cp == NULL)
+ return 0;
+ gargv++;
+
+ if (*cp == '\"' || *cp == '\'')
+ return *(cp + 1);
+
+ /* strtoumax won't error -ve values */
+ while (isspace(*(unsigned char *)cp))
+ cp++;
+ if (*cp == '-') {
+ warnx("%s: expected positive numeric value", cp);
+ rval = 1;
+ return 0;
+ }
+
+ errno = 0;
+ val = strtoumax(cp, &ep, 0);
+ check_conversion(cp, ep);
+ return val;
+}
+
+static double
+getdouble(void)
+{
+ double val;
+ char *ep;
+
+ if (!*gargv)
+ return (0.0);
+
+ if (**gargv == '\"' || **gargv == '\'')
+ return (double) *((*gargv++)+1);
+
+ errno = 0;
+ val = strtod(*gargv, &ep);
+ check_conversion(*gargv++, ep);
+ return val;
+}
+
+static void
+check_conversion(const char *s, const char *ep)
+{
+ if (*ep) {
+ if (ep == s)
+ warnx("%s: expected numeric value", s);
+ else
+ warnx("%s: not completely converted", s);
+ rval = 1;
+ } else if (errno == ERANGE) {
+ warnx("%s: %s", s, sh_strerror(psh, ERANGE));
+ rval = 1;
+ }
+}
+
+static void
+usage(void)
+{
+ (void)fprintf(stderr, "Usage: %s format [arg ...]\n", getprogname());
+}
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