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654276143b
to avoid passing negative values and potential locale problems. Problem noted by Christian Biere. * strgutil.c (strlwr,strcasecmp,strncasecmp): Make sure we don't pass a negative value. * miscutil.c (scan_isodatestr): Ditto.
362 lines
8.3 KiB
C
362 lines
8.3 KiB
C
/* miscutil.c - miscellaneous utilities
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* Copyright (C) 1998, 1999, 2000, 2001, 2003 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#include <config.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <time.h>
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#include <ctype.h>
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#ifdef HAVE_LANGINFO_H
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#include <langinfo.h>
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#endif
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#include "types.h"
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#include "util.h"
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#include "i18n.h"
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/****************
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* I know that the OpenPGP protocol has a Y2106 problem ;-)
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*/
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u32
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make_timestamp()
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{
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return time(NULL);
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}
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/****************
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* Scan a date string and return a timestamp.
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* The only supported format is "yyyy-mm-dd"
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* Returns 0 for an invalid date.
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*/
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u32
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scan_isodatestr( const char *string )
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{
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int year, month, day;
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struct tm tmbuf;
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time_t stamp;
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int i;
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if( strlen(string) != 10 || string[4] != '-' || string[7] != '-' )
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return 0;
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for( i=0; i < 4; i++ )
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if( !digitp(string+i) )
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return 0;
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if( !digitp(string+5) || !digitp(string+6) )
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return 0;
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if( !digitp(string+8) || !digitp(string+9) )
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return 0;
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year = atoi(string);
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month = atoi(string+5);
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day = atoi(string+8);
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/* some basic checks */
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if( year < 1970 || month < 1 || month > 12 || day < 1 || day > 31 )
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return 0;
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memset( &tmbuf, 0, sizeof tmbuf );
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tmbuf.tm_mday = day;
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tmbuf.tm_mon = month-1;
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tmbuf.tm_year = year - 1900;
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tmbuf.tm_isdst = -1;
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stamp = mktime( &tmbuf );
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if( stamp == (time_t)-1 )
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return 0;
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return stamp;
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}
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u32
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add_days_to_timestamp( u32 stamp, u16 days )
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{
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return stamp + days*86400L;
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}
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/****************
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* Return a string with a time value in the form: x Y, n D, n H
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*/
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const char *
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strtimevalue( u32 value )
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{
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static char buffer[30];
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unsigned int years, days, hours, minutes;
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value /= 60;
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minutes = value % 60;
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value /= 60;
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hours = value % 24;
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value /= 24;
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days = value % 365;
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value /= 365;
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years = value;
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sprintf(buffer,"%uy%ud%uh%um", years, days, hours, minutes );
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if( years )
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return buffer;
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if( days )
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return strchr( buffer, 'y' ) + 1;
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return strchr( buffer, 'd' ) + 1;
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}
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/****************
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* Note: this function returns GMT
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*/
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const char *
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strtimestamp( u32 stamp )
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{
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static char buffer[11+5];
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struct tm *tp;
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time_t atime = stamp;
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if (atime < 0) {
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strcpy (buffer, "????" "-??" "-??");
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}
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else {
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tp = gmtime( &atime );
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sprintf(buffer,"%04d-%02d-%02d",
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1900+tp->tm_year, tp->tm_mon+1, tp->tm_mday );
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}
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return buffer;
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}
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/****************
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* Note: this function returns local time
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*/
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const char *
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asctimestamp( u32 stamp )
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{
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static char buffer[50];
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#if defined (HAVE_STRFTIME) && defined (HAVE_NL_LANGINFO)
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static char fmt[50];
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#endif
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struct tm *tp;
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time_t atime = stamp;
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if (atime < 0) {
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strcpy (buffer, "????" "-??" "-??");
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return buffer;
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}
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tp = localtime( &atime );
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#ifdef HAVE_STRFTIME
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#if defined(HAVE_NL_LANGINFO)
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mem2str( fmt, nl_langinfo(D_T_FMT), DIM(fmt)-3 );
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if( strstr( fmt, "%Z" ) == NULL )
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strcat( fmt, " %Z");
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strftime( buffer, DIM(buffer)-1, fmt, tp );
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#else
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/* fixme: we should check whether the locale appends a " %Z"
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* These locales from glibc don't put the " %Z":
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* fi_FI hr_HR ja_JP lt_LT lv_LV POSIX ru_RU ru_SU sv_FI sv_SE zh_CN
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*/
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strftime( buffer, DIM(buffer)-1, "%c %Z", tp );
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#endif
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buffer[DIM(buffer)-1] = 0;
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#else
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mem2str( buffer, asctime(tp), DIM(buffer) );
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#endif
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return buffer;
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}
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/****************
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* Print a string to FP, but filter all control characters out.
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*/
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void
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print_string( FILE *fp, const byte *p, size_t n, int delim )
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{
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for( ; n; n--, p++ )
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if( *p < 0x20 || (*p >= 0x7f && *p < 0xa0) || *p == delim ||
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(delim && *p=='\\')) {
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putc('\\', fp);
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if( *p == '\n' )
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putc('n', fp);
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else if( *p == '\r' )
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putc('r', fp);
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else if( *p == '\f' )
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putc('f', fp);
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else if( *p == '\v' )
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putc('v', fp);
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else if( *p == '\b' )
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putc('b', fp);
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else if( !*p )
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putc('0', fp);
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else
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fprintf(fp, "x%02x", *p );
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}
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else
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putc(*p, fp);
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}
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/****************
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* Print an UTF8 string to FP and filter all control characters out.
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*/
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void
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print_utf8_string2 ( FILE *fp, const byte *p, size_t n, int delim )
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{
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size_t i;
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char *buf;
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/* we can handle plain ascii simpler, so check for it first */
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for(i=0; i < n; i++ ) {
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if( p[i] & 0x80 )
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break;
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}
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if( i < n ) {
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buf = utf8_to_native ( p, n, delim );
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/*(utf8 conversion already does the control character quoting)*/
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fputs( buf, fp );
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m_free( buf );
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}
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else
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print_string( fp, p, n, delim );
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}
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void
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print_utf8_string( FILE *fp, const byte *p, size_t n )
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{
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print_utf8_string2 (fp, p, n, 0);
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}
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/****************
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* This function returns a string which is suitable for printing
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* Caller must release it with m_free()
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*/
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char *
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make_printable_string( const byte *p, size_t n, int delim )
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{
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size_t save_n, buflen;
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const byte *save_p;
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char *buffer, *d;
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/* first count length */
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for(save_n = n, save_p = p, buflen=1 ; n; n--, p++ ) {
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if( *p < 0x20 || (*p >= 0x7f && *p < 0xa0) || *p == delim ||
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(delim && *p=='\\')) {
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if( *p=='\n' || *p=='\r' || *p=='\f'
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|| *p=='\v' || *p=='\b' || !*p )
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buflen += 2;
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else
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buflen += 4;
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}
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else
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buflen++;
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}
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p = save_p;
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n = save_n;
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/* and now make the string */
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d = buffer = m_alloc( buflen );
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for( ; n; n--, p++ ) {
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if( *p < 0x20 || (*p >= 0x7f && *p < 0xa0) || *p == delim ||
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(delim && *p=='\\')) {
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*d++ = '\\';
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if( *p == '\n' )
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*d++ = 'n';
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else if( *p == '\r' )
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*d++ = 'r';
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else if( *p == '\f' )
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*d++ = 'f';
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else if( *p == '\v' )
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*d++ = 'v';
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else if( *p == '\b' )
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*d++ = 'b';
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else if( !*p )
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*d++ = '0';
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else {
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sprintf(d, "x%02x", *p );
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d += 2;
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}
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}
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else
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*d++ = *p;
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}
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*d = 0;
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return buffer;
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}
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int
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answer_is_yes_no_default( const char *s, int def_answer )
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{
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const char *long_yes = _("yes");
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const char *short_yes = _("yY");
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const char *long_no = _("no");
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const char *short_no = _("nN");
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/* Note: we have to use the local dependent strcasecmp here */
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if( !strcasecmp(s, long_yes ) )
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return 1;
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if( *s && strchr( short_yes, *s ) && !s[1] )
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return 1;
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/* test for no strings to catch ambiguities for the next test */
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if( !strcasecmp(s, long_no ) )
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return 0;
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if( *s && strchr( short_no, *s ) && !s[1] )
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return 0;
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/* test for the english version (for those who are used to type yes) */
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if( !ascii_strcasecmp(s, "yes" ) )
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return 1;
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if( *s && strchr( "yY", *s ) && !s[1] )
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return 1;
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return def_answer;
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}
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int
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answer_is_yes( const char *s )
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{
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return answer_is_yes_no_default(s,0);
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}
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/****************
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* Return 1 for yes, -1 for quit, or 0 for no
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*/
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int
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answer_is_yes_no_quit( const char *s )
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{
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const char *long_yes = _("yes");
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const char *long_no = _("no");
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const char *long_quit = _("quit");
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const char *short_yes = _("yY");
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const char *short_no = _("nN");
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const char *short_quit = _("qQ");
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/* Note: We have to use the locale dependent strcasecmp */
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if( !strcasecmp(s, long_no ) )
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return 0;
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if( !strcasecmp(s, long_yes ) )
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return 1;
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if( !strcasecmp(s, long_quit ) )
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return -1;
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if( *s && strchr( short_no, *s ) && !s[1] )
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return 0;
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if( *s && strchr( short_yes, *s ) && !s[1] )
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return 1;
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if( *s && strchr( short_quit, *s ) && !s[1] )
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return -1;
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/* but not here */
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if( !ascii_strcasecmp(s, "yes" ) )
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return 1;
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if( !ascii_strcasecmp(s, "quit" ) )
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return -1;
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if( *s && strchr( "yY", *s ) && !s[1] )
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return 1;
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if( *s && strchr( "qQ", *s ) && !s[1] )
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return -1;
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return 0;
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}
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