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326 lines
6.8 KiB
C
326 lines
6.8 KiB
C
/* $NetBSD: fmtcheck.c,v 1.8 2008/04/28 20:22:59 martin Exp $ */
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/*-
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* Copyright (c) 2000 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code was contributed to The NetBSD Foundation by Allen Briggs.
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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__weak_reference(__fmtcheck, fmtcheck);
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enum __e_fmtcheck_types {
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FMTCHECK_START,
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FMTCHECK_SHORT,
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FMTCHECK_INT,
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FMTCHECK_WINTT,
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FMTCHECK_LONG,
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FMTCHECK_QUAD,
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FMTCHECK_INTMAXT,
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FMTCHECK_PTRDIFFT,
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FMTCHECK_SIZET,
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FMTCHECK_CHARPOINTER,
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FMTCHECK_SHORTPOINTER,
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FMTCHECK_INTPOINTER,
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FMTCHECK_LONGPOINTER,
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FMTCHECK_QUADPOINTER,
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FMTCHECK_INTMAXTPOINTER,
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FMTCHECK_PTRDIFFTPOINTER,
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FMTCHECK_SIZETPOINTER,
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#ifndef NO_FLOATING_POINT
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FMTCHECK_DOUBLE,
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FMTCHECK_LONGDOUBLE,
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#endif
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FMTCHECK_STRING,
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FMTCHECK_WSTRING,
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FMTCHECK_WIDTH,
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FMTCHECK_PRECISION,
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FMTCHECK_DONE,
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FMTCHECK_UNKNOWN
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};
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typedef enum __e_fmtcheck_types EFT;
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enum e_modifier {
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MOD_NONE,
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MOD_CHAR,
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MOD_SHORT,
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MOD_LONG,
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MOD_QUAD,
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MOD_INTMAXT,
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MOD_LONGDOUBLE,
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MOD_PTRDIFFT,
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MOD_SIZET,
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};
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#define RETURN(pf,f,r) do { \
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*(pf) = (f); \
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return r; \
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} /*NOTREACHED*/ /*CONSTCOND*/ while (0)
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static EFT
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get_next_format_from_precision(const char **pf)
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{
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enum e_modifier modifier;
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const char *f;
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f = *pf;
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switch (*f) {
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case 'h':
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f++;
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if (!*f) RETURN(pf,f,FMTCHECK_UNKNOWN);
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if (*f == 'h') {
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f++;
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modifier = MOD_CHAR;
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} else {
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modifier = MOD_SHORT;
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}
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break;
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case 'j':
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f++;
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modifier = MOD_INTMAXT;
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break;
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case 'l':
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f++;
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if (!*f) RETURN(pf,f,FMTCHECK_UNKNOWN);
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if (*f == 'l') {
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f++;
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modifier = MOD_QUAD;
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} else {
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modifier = MOD_LONG;
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}
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break;
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case 'q':
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f++;
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modifier = MOD_QUAD;
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break;
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case 't':
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f++;
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modifier = MOD_PTRDIFFT;
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break;
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case 'z':
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f++;
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modifier = MOD_SIZET;
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break;
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case 'L':
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f++;
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modifier = MOD_LONGDOUBLE;
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break;
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default:
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modifier = MOD_NONE;
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break;
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}
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if (!*f) RETURN(pf,f,FMTCHECK_UNKNOWN);
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if (strchr("diouxX", *f)) {
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switch (modifier) {
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case MOD_LONG:
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RETURN(pf,f,FMTCHECK_LONG);
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case MOD_QUAD:
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RETURN(pf,f,FMTCHECK_QUAD);
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case MOD_INTMAXT:
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RETURN(pf,f,FMTCHECK_INTMAXT);
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case MOD_PTRDIFFT:
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RETURN(pf,f,FMTCHECK_PTRDIFFT);
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case MOD_SIZET:
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RETURN(pf,f,FMTCHECK_SIZET);
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case MOD_CHAR:
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case MOD_SHORT:
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case MOD_NONE:
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RETURN(pf,f,FMTCHECK_INT);
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default:
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RETURN(pf,f,FMTCHECK_UNKNOWN);
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}
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}
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if (*f == 'n') {
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switch (modifier) {
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case MOD_CHAR:
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RETURN(pf,f,FMTCHECK_CHARPOINTER);
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case MOD_SHORT:
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RETURN(pf,f,FMTCHECK_SHORTPOINTER);
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case MOD_LONG:
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RETURN(pf,f,FMTCHECK_LONGPOINTER);
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case MOD_QUAD:
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RETURN(pf,f,FMTCHECK_QUADPOINTER);
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case MOD_INTMAXT:
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RETURN(pf,f,FMTCHECK_INTMAXTPOINTER);
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case MOD_PTRDIFFT:
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RETURN(pf,f,FMTCHECK_PTRDIFFTPOINTER);
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case MOD_SIZET:
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RETURN(pf,f,FMTCHECK_SIZETPOINTER);
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case MOD_NONE:
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RETURN(pf,f,FMTCHECK_INTPOINTER);
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default:
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RETURN(pf,f,FMTCHECK_UNKNOWN);
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}
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}
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if (strchr("DOU", *f)) {
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if (modifier != MOD_NONE)
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RETURN(pf,f,FMTCHECK_UNKNOWN);
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RETURN(pf,f,FMTCHECK_LONG);
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}
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#ifndef NO_FLOATING_POINT
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if (strchr("aAeEfFgG", *f)) {
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switch (modifier) {
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case MOD_LONGDOUBLE:
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RETURN(pf,f,FMTCHECK_LONGDOUBLE);
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case MOD_LONG:
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case MOD_NONE:
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RETURN(pf,f,FMTCHECK_DOUBLE);
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default:
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RETURN(pf,f,FMTCHECK_UNKNOWN);
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}
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}
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#endif
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if (*f == 'c') {
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switch (modifier) {
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case MOD_LONG:
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RETURN(pf,f,FMTCHECK_WINTT);
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case MOD_NONE:
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RETURN(pf,f,FMTCHECK_INT);
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default:
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RETURN(pf,f,FMTCHECK_UNKNOWN);
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}
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}
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if (*f == 'C') {
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if (modifier != MOD_NONE)
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RETURN(pf,f,FMTCHECK_UNKNOWN);
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RETURN(pf,f,FMTCHECK_WINTT);
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}
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if (*f == 's') {
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switch (modifier) {
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case MOD_LONG:
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RETURN(pf,f,FMTCHECK_WSTRING);
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case MOD_NONE:
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RETURN(pf,f,FMTCHECK_STRING);
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default:
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RETURN(pf,f,FMTCHECK_UNKNOWN);
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}
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}
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if (*f == 'S') {
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if (modifier != MOD_NONE)
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RETURN(pf,f,FMTCHECK_UNKNOWN);
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RETURN(pf,f,FMTCHECK_WSTRING);
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}
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if (*f == 'p') {
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if (modifier != MOD_NONE)
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RETURN(pf,f,FMTCHECK_UNKNOWN);
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RETURN(pf,f,FMTCHECK_LONG);
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}
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RETURN(pf,f,FMTCHECK_UNKNOWN);
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/*NOTREACHED*/
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}
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static EFT
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get_next_format_from_width(const char **pf)
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{
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const char *f;
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f = *pf;
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if (*f == '.') {
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f++;
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if (*f == '*') {
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RETURN(pf,f,FMTCHECK_PRECISION);
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}
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/* eat any precision (empty is allowed) */
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while (isdigit(*f)) f++;
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if (!*f) RETURN(pf,f,FMTCHECK_UNKNOWN);
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}
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RETURN(pf,f,get_next_format_from_precision(pf));
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/*NOTREACHED*/
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}
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static EFT
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get_next_format(const char **pf, EFT eft)
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{
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int infmt;
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const char *f;
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if (eft == FMTCHECK_WIDTH) {
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(*pf)++;
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return get_next_format_from_width(pf);
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} else if (eft == FMTCHECK_PRECISION) {
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(*pf)++;
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return get_next_format_from_precision(pf);
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}
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f = *pf;
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infmt = 0;
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while (!infmt) {
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f = strchr(f, '%');
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if (f == NULL)
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RETURN(pf,f,FMTCHECK_DONE);
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f++;
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if (!*f)
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RETURN(pf,f,FMTCHECK_UNKNOWN);
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if (*f != '%')
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infmt = 1;
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else
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f++;
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}
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/* Eat any of the flags */
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while (*f && (strchr("#'0- +", *f)))
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f++;
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if (*f == '*') {
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RETURN(pf,f,FMTCHECK_WIDTH);
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}
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/* eat any width */
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while (isdigit(*f)) f++;
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if (!*f) {
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RETURN(pf,f,FMTCHECK_UNKNOWN);
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}
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RETURN(pf,f,get_next_format_from_width(pf));
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/*NOTREACHED*/
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}
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const char *
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__fmtcheck(const char *f1, const char *f2)
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{
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const char *f1p, *f2p;
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EFT f1t, f2t;
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if (!f1) return f2;
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f1p = f1;
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f1t = FMTCHECK_START;
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f2p = f2;
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f2t = FMTCHECK_START;
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while ((f1t = get_next_format(&f1p, f1t)) != FMTCHECK_DONE) {
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if (f1t == FMTCHECK_UNKNOWN)
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return f2;
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f2t = get_next_format(&f2p, f2t);
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if (f1t != f2t)
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return f2;
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}
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return f1;
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}
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