a6d0508dd8
Add %M{essage} extension which prints an errno value as the
corresponding string if possible or numerically otherwise.
It is not currently possible to do the syslog(3) like %m extension
because errno would need to get capatured on entry to the first
function in the printf family, so %M requires you to supply errno
as an argument.
Add %Q{uote} extension which will print a string in double quotes with
appropriate back-slash escapes (only) if necessary.
109 lines
2.9 KiB
C
109 lines
2.9 KiB
C
/*-
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* Copyright (c) 2005 Poul-Henning Kamp
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <namespace.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <wchar.h>
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#include <vis.h>
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#include <assert.h>
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#include <sys/time.h>
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#include "printf.h"
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int
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__printf_arginfo_quote(const struct printf_info *pi __unused, size_t n, int *argt)
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{
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assert(n >= 1);
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argt[0] = PA_POINTER;
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return (1);
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}
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int
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__printf_render_quote(struct __printf_io *io, const struct printf_info *pi __unused, const void *const *arg)
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{
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const char *str, *p, *t, *o;
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char *q, *r;
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int i, ret;
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str = *((const char *const *)arg[0]);
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if (str == NULL)
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return (__printf_out(io, pi, "\"(null)\"", 8));
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i = 0;
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if (*str == '\0')
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i++;
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else if (*str == '#')
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i++;
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else {
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for (p = str; *p; p++)
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if (isspace(*p) || *p == '\\' || *p == '"')
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i++;
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}
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if (!i)
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return (__printf_out(io, pi, str, strlen(str)));
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q = malloc(strlen(str) * 5);
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assert(q != NULL);
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r = q;
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ret = __printf_out(io, pi, "\"", 1);
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t = str;
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for (p = str; *p; p++) {
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o = NULL;
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if (*p == '\\')
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o = "\\\\";
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else if (*p == '\n')
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o = "\\n";
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else if (*p == '\r')
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o = "\\r";
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else if (*p == '\t')
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o = "\\t";
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else if (*p == ' ')
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o = " ";
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else if (*p == '"')
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o = "\\\"";
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else if (isspace(*p)) {
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sprintf(r, "\\%03o", *p);
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o = r;
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r += strlen(r) + 1;
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} else
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continue;
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if (p != t) {
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ret += __printf_out(io, pi, t, p - t);
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t = p + 1;
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}
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ret += __printf_out(io, pi, o, strlen(o));
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}
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if (p != t)
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ret += __printf_out(io, pi, t, p - t);
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ret += __printf_out(io, pi, "\"", 1);
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__printf_flush(io);
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return(ret);
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}
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