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gnupg/util/strgutil.c
David Shaw 3f51f7db3d Update head to match stable 1.0
2002-06-29 13:46:34 +00:00

896 lines
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/* strgutil.c - string utilities
* Copyright (C) 1994, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include <config.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "types.h"
#include "util.h"
#include "memory.h"
static ushort koi8_unicode[128] = {
0x2500,0x2502,0x250c,0x2510,0x2514,0x2518,0x251c,0x2524,
0x252c,0x2534,0x253c,0x2580,0x2584,0x2588,0x258c,0x2590,
0x2591,0x2592,0x2593,0x2320,0x25a0,0x2219,0x221a,0x2248,
0x2264,0x2265,0x00a0,0x2321,0x00b0,0x00b2,0x00b7,0x00f7,
0x2550,0x2551,0x2552,0x0451,0x2553,0x2554,0x2555,0x2556,
0x2557,0x2558,0x2559,0x255a,0x255b,0x255c,0x255d,0x255e,
0x255f,0x2560,0x2561,0x0401,0x2562,0x2563,0x2564,0x2565,
0x2566,0x2567,0x2568,0x2569,0x256a,0x256b,0x256c,0x00a9,
0x044e,0x0430,0x0431,0x0446,0x0434,0x0435,0x0444,0x0433,
0x0445,0x0438,0x0439,0x043a,0x043b,0x043c,0x043d,0x043e,
0x043f,0x044f,0x0440,0x0441,0x0442,0x0443,0x0436,0x0432,
0x044c,0x044b,0x0437,0x0448,0x044d,0x0449,0x0447,0x044a,
0x042e,0x0410,0x0411,0x0426,0x0414,0x0415,0x0424,0x0413,
0x0425,0x0418,0x0419,0x041a,0x041b,0x041c,0x041d,0x041e,
0x041f,0x042f,0x0420,0x0421,0x0422,0x0423,0x0416,0x0412,
0x042c,0x042b,0x0417,0x0428,0x042d,0x0429,0x0427,0x042a
};
static ushort latin2_unicode[128] = {
0x0080,0x0081,0x0082,0x0083,0x0084,0x0085,0x0086,0x0087,
0x0088,0x0089,0x008A,0x008B,0x008C,0x008D,0x008E,0x008F,
0x0090,0x0091,0x0092,0x0093,0x0094,0x0095,0x0096,0x0097,
0x0098,0x0099,0x009A,0x009B,0x009C,0x009D,0x009E,0x009F,
0x00A0,0x0104,0x02D8,0x0141,0x00A4,0x013D,0x015A,0x00A7,
0x00A8,0x0160,0x015E,0x0164,0x0179,0x00AD,0x017D,0x017B,
0x00B0,0x0105,0x02DB,0x0142,0x00B4,0x013E,0x015B,0x02C7,
0x00B8,0x0161,0x015F,0x0165,0x017A,0x02DD,0x017E,0x017C,
0x0154,0x00C1,0x00C2,0x0102,0x00C4,0x0139,0x0106,0x00C7,
0x010C,0x00C9,0x0118,0x00CB,0x011A,0x00CD,0x00CE,0x010E,
0x0110,0x0143,0x0147,0x00D3,0x00D4,0x0150,0x00D6,0x00D7,
0x0158,0x016E,0x00DA,0x0170,0x00DC,0x00DD,0x0162,0x00DF,
0x0155,0x00E1,0x00E2,0x0103,0x00E4,0x013A,0x0107,0x00E7,
0x010D,0x00E9,0x0119,0x00EB,0x011B,0x00ED,0x00EE,0x010F,
0x0111,0x0144,0x0148,0x00F3,0x00F4,0x0151,0x00F6,0x00F7,
0x0159,0x016F,0x00FA,0x0171,0x00FC,0x00FD,0x0163,0x02D9
};
static const char *active_charset_name = "iso-8859-1";
static ushort *active_charset = NULL;
static int no_translation = 0;
void
free_strlist( STRLIST sl )
{
STRLIST sl2;
for(; sl; sl = sl2 ) {
sl2 = sl->next;
m_free(sl);
}
}
STRLIST
add_to_strlist( STRLIST *list, const char *string )
{
STRLIST sl;
sl = m_alloc( sizeof *sl + strlen(string));
sl->flags = 0;
strcpy(sl->d, string);
sl->next = *list;
*list = sl;
return sl;
}
/****************
* ame as add_to_strlist() but if is_utf8 is *not* set a conversion
* to UTF8 is done
*/
STRLIST
add_to_strlist2( STRLIST *list, const char *string, int is_utf8 )
{
STRLIST sl;
if( is_utf8 )
sl = add_to_strlist( list, string );
else {
char *p = native_to_utf8( string );
sl = add_to_strlist( list, p );
m_free( p );
}
return sl;
}
STRLIST
append_to_strlist( STRLIST *list, const char *string )
{
STRLIST r, sl;
sl = m_alloc( sizeof *sl + strlen(string));
sl->flags = 0;
strcpy(sl->d, string);
sl->next = NULL;
if( !*list )
*list = sl;
else {
for( r = *list; r->next; r = r->next )
;
r->next = sl;
}
return sl;
}
STRLIST
append_to_strlist2( STRLIST *list, const char *string, int is_utf8 )
{
STRLIST sl;
if( is_utf8 )
sl = append_to_strlist( list, string );
else {
char *p = native_to_utf8( string );
sl = append_to_strlist( list, p );
m_free( p );
}
return sl;
}
STRLIST
strlist_prev( STRLIST head, STRLIST node )
{
STRLIST n;
for(n=NULL; head && head != node; head = head->next )
n = head;
return n;
}
STRLIST
strlist_last( STRLIST node )
{
if( node )
for( ; node->next ; node = node->next )
;
return node;
}
char *
pop_strlist( STRLIST *list )
{
char *str=NULL;
STRLIST sl=*list;
if(sl)
{
str=m_alloc(strlen(sl->d)+1);
strcpy(str,sl->d);
*list=sl->next;
m_free(sl);
}
return str;
}
/****************
* look for the substring SUB in buffer and return a pointer to that
* substring in BUF or NULL if not found.
* Comparison is case-insensitive.
*/
const char *
memistr( const char *buf, size_t buflen, const char *sub )
{
const byte *t, *s ;
size_t n;
for( t=buf, n=buflen, s=sub ; n ; t++, n-- )
if( toupper(*t) == toupper(*s) ) {
for( buf=t++, buflen = n--, s++;
n && toupper(*t) == toupper(*s); t++, s++, n-- )
;
if( !*s )
return buf;
t = buf; n = buflen; s = sub ;
}
return NULL ;
}
const char *
ascii_memistr( const char *buf, size_t buflen, const char *sub )
{
const byte *t, *s ;
size_t n;
for( t=buf, n=buflen, s=sub ; n ; t++, n-- )
if( ascii_toupper(*t) == ascii_toupper(*s) ) {
for( buf=t++, buflen = n--, s++;
n && ascii_toupper(*t) == ascii_toupper(*s); t++, s++, n-- )
;
if( !*s )
return buf;
t = buf; n = buflen; s = sub ;
}
return NULL ;
}
/****************
* Wie strncpy(), aber es werden maximal n-1 zeichen kopiert und ein
* '\0' angeh<65>ngt. Ist n = 0, so geschieht nichts, ist Destination
* gleich NULL, so wird via m_alloc Speicher besorgt, ist dann nicht
* gen<65>gend Speicher vorhanden, so bricht die funktion ab.
*/
char *
mem2str( char *dest , const void *src , size_t n )
{
char *d;
const char *s;
if( n ) {
if( !dest )
dest = m_alloc( n ) ;
d = dest;
s = src ;
for(n--; n && *s; n-- )
*d++ = *s++;
*d = '\0' ;
}
return dest ;
}
/****************
* remove leading and trailing white spaces
*/
char *
trim_spaces( char *str )
{
char *string, *p, *mark;
string = str;
/* find first non space character */
for( p=string; *p && isspace( *(byte*)p ) ; p++ )
;
/* move characters */
for( (mark = NULL); (*string = *p); string++, p++ )
if( isspace( *(byte*)p ) ) {
if( !mark )
mark = string ;
}
else
mark = NULL ;
if( mark )
*mark = '\0' ; /* remove trailing spaces */
return str ;
}
unsigned int
trim_trailing_chars( byte *line, unsigned len, const char *trimchars )
{
byte *p, *mark;
unsigned n;
for(mark=NULL, p=line, n=0; n < len; n++, p++ ) {
if( strchr(trimchars, *p ) ) {
if( !mark )
mark = p;
}
else
mark = NULL;
}
if( mark ) {
*mark = 0;
return mark - line;
}
return len;
}
/****************
* remove trailing white spaces and return the length of the buffer
*/
unsigned
trim_trailing_ws( byte *line, unsigned len )
{
return trim_trailing_chars( line, len, " \t\r\n" );
}
unsigned int
check_trailing_chars( const byte *line, unsigned int len,
const char *trimchars )
{
const byte *p, *mark;
unsigned int n;
for(mark=NULL, p=line, n=0; n < len; n++, p++ ) {
if( strchr(trimchars, *p ) ) {
if( !mark )
mark = p;
}
else
mark = NULL;
}
if( mark ) {
return mark - line;
}
return len;
}
/****************
* remove trailing white spaces and return the length of the buffer
*/
unsigned int
check_trailing_ws( const byte *line, unsigned int len )
{
return check_trailing_chars( line, len, " \t\r\n" );
}
int
string_count_chr( const char *string, int c )
{
int count;
for(count=0; *string; string++ )
if( *string == c )
count++;
return count;
}
int
set_native_charset( const char *newset )
{
if( !ascii_strcasecmp( newset, "iso-8859-1" ) ) {
active_charset_name = "iso-8859-1";
no_translation = 0;
active_charset = NULL;
}
else if( !ascii_strcasecmp( newset, "iso-8859-2" ) ) {
active_charset_name = "iso-8859-2";
no_translation = 0;
active_charset = latin2_unicode;
}
else if( !ascii_strcasecmp( newset, "koi8-r" ) ) {
active_charset_name = "koi8-r";
no_translation = 0;
active_charset = koi8_unicode;
}
else if( !ascii_strcasecmp (newset, "utf8" )
|| !ascii_strcasecmp(newset, "utf-8") ) {
active_charset_name = "utf-8";
no_translation = 1;
active_charset = NULL;
}
else
return G10ERR_GENERAL;
return 0;
}
const char*
get_native_charset()
{
return active_charset_name;
}
/****************
* Convert string, which is in native encoding to UTF8 and return the
* new allocated UTF8 string.
*/
char *
native_to_utf8( const char *string )
{
const byte *s;
char *buffer;
byte *p;
size_t length=0;
if (no_translation) {
buffer = m_strdup (string);
}
else if( active_charset ) {
for(s=string; *s; s++ ) {
length++;
if( *s & 0x80 )
length += 2; /* we may need 3 bytes */
}
buffer = m_alloc( length + 1 );
for(p=buffer, s=string; *s; s++ ) {
if( *s & 0x80 ) {
ushort val = active_charset[ *s & 0x7f ];
if( val < 0x0800 ) {
*p++ = 0xc0 | ( (val >> 6) & 0x1f );
*p++ = 0x80 | ( val & 0x3f );
}
else {
*p++ = 0xe0 | ( (val >> 12) & 0x0f );
*p++ = 0x80 | ( (val >> 6) & 0x3f );
*p++ = 0x80 | ( val & 0x3f );
}
}
else
*p++ = *s;
}
*p = 0;
}
else {
for(s=string; *s; s++ ) {
length++;
if( *s & 0x80 )
length++;
}
buffer = m_alloc( length + 1 );
for(p=buffer, s=string; *s; s++ ) {
if( *s & 0x80 ) {
*p++ = 0xc0 | ((*s >> 6) & 3);
*p++ = 0x80 | ( *s & 0x3f );
}
else
*p++ = *s;
}
*p = 0;
}
return buffer;
}
/****************
* Convert string, which is in UTF8 to native encoding. illegal
* encodings by some "\xnn" and quote all control characters. A
* character with value DELIM will always be quoted, it must be a
* vanilla ASCII character.
*/
char *
utf8_to_native( const char *string, size_t length, int delim )
{
int nleft;
int i;
byte encbuf[8];
int encidx;
const byte *s;
size_t n;
byte *buffer = NULL, *p = NULL;
unsigned long val = 0;
size_t slen;
int resync = 0;
/* 1. pass (p==NULL): count the extended utf-8 characters */
/* 2. pass (p!=NULL): create string */
for( ;; ) {
for( slen=length, nleft=encidx=0, n=0, s=string; slen; s++, slen-- ) {
if( resync ) {
if( !(*s < 128 || (*s >= 0xc0 && *s <= 0xfd)) ) {
/* still invalid */
if( p ) {
sprintf(p, "\\x%02x", *s );
p += 4;
}
n += 4;
continue;
}
resync = 0;
}
if( !nleft ) {
if( !(*s & 0x80) ) { /* plain ascii */
if( *s < 0x20 || *s == 0x7f || *s == delim ||
(delim && *s=='\\')) {
n++;
if( p )
*p++ = '\\';
switch( *s ) {
case '\n': n++; if( p ) *p++ = 'n'; break;
case '\r': n++; if( p ) *p++ = 'r'; break;
case '\f': n++; if( p ) *p++ = 'f'; break;
case '\v': n++; if( p ) *p++ = 'v'; break;
case '\b': n++; if( p ) *p++ = 'b'; break;
case 0 : n++; if( p ) *p++ = '0'; break;
default:
n += 3;
if ( p ) {
sprintf( p, "x%02x", *s );
p += 3;
}
break;
}
}
else {
if( p ) *p++ = *s;
n++;
}
}
else if( (*s & 0xe0) == 0xc0 ) { /* 110x xxxx */
val = *s & 0x1f;
nleft = 1;
encidx = 0;
encbuf[encidx++] = *s;
}
else if( (*s & 0xf0) == 0xe0 ) { /* 1110 xxxx */
val = *s & 0x0f;
nleft = 2;
encidx = 0;
encbuf[encidx++] = *s;
}
else if( (*s & 0xf8) == 0xf0 ) { /* 1111 0xxx */
val = *s & 0x07;
nleft = 3;
encidx = 0;
encbuf[encidx++] = *s;
}
else if( (*s & 0xfc) == 0xf8 ) { /* 1111 10xx */
val = *s & 0x03;
nleft = 4;
encidx = 0;
encbuf[encidx++] = *s;
}
else if( (*s & 0xfe) == 0xfc ) { /* 1111 110x */
val = *s & 0x01;
nleft = 5;
encidx = 0;
encbuf[encidx++] = *s;
}
else { /* invalid encoding: print as \xnn */
if( p ) {
sprintf(p, "\\x%02x", *s );
p += 4;
}
n += 4;
resync = 1;
}
}
else if( *s < 0x80 || *s >= 0xc0 ) { /* invalid */
if( p ) {
for(i=0; i < encidx; i++ ) {
sprintf(p, "\\x%02x", encbuf[i] );
p += 4;
}
sprintf(p, "\\x%02x", *s );
p += 4;
}
n += 4 + 4*encidx;
nleft = 0;
encidx = 0;
resync = 1;
}
else {
encbuf[encidx++] = *s;
val <<= 6;
val |= *s & 0x3f;
if( !--nleft ) { /* ready */
if (no_translation) {
if( p ) {
for(i=0; i < encidx; i++ )
*p++ = encbuf[i];
}
n += encidx;
encidx = 0;
}
else if( active_charset ) { /* table lookup */
for(i=0; i < 128; i++ ) {
if( active_charset[i] == val )
break;
}
if( i < 128 ) { /* we can print this one */
if( p ) *p++ = i+128;
n++;
}
else { /* we do not have a translation: print utf8 */
if( p ) {
for(i=0; i < encidx; i++ ) {
sprintf(p, "\\x%02x", encbuf[i] );
p += 4;
}
}
n += encidx*4;
encidx = 0;
}
}
else { /* native set */
if( val >= 0x80 && val < 256 ) {
n++; /* we can simply print this character */
if( p ) *p++ = val;
}
else { /* we do not have a translation: print utf8 */
if( p ) {
for(i=0; i < encidx; i++ ) {
sprintf(p, "\\x%02x", encbuf[i] );
p += 4;
}
}
n += encidx*4;
encidx = 0;
}
}
}
}
}
if( !buffer ) { /* allocate the buffer after the first pass */
buffer = p = m_alloc( n + 1 );
}
else {
*p = 0; /* make a string */
return buffer;
}
}
}
/****************************************************
******** locale insensitive ctype functions ********
****************************************************/
/* FIXME: replace them by a table lookup and macros */
int
ascii_isupper (int c)
{
return c >= 'A' && c <= 'Z';
}
int
ascii_islower (int c)
{
return c >= 'a' && c <= 'z';
}
int
ascii_toupper (int c)
{
if (c >= 'a' && c <= 'z')
c &= ~0x20;
return c;
}
int
ascii_tolower (int c)
{
if (c >= 'A' && c <= 'Z')
c |= 0x20;
return c;
}
int
ascii_strcasecmp( const char *a, const char *b )
{
if (a == b)
return 0;
for (; *a && *b; a++, b++) {
if (*a != *b && ascii_toupper(*a) != ascii_toupper(*b))
break;
}
return *a == *b? 0 : (ascii_toupper (*a) - ascii_toupper (*b));
}
int
ascii_memcasecmp( const char *a, const char *b, size_t n )
{
if (a == b)
return 0;
for ( ; n; n--, a++, b++ ) {
if( *a != *b && ascii_toupper (*a) != ascii_toupper (*b) )
return *a == *b? 0 : (ascii_toupper (*a) - ascii_toupper (*b));
}
return 0;
}
/*********************************************
********** missing string functions *********
*********************************************/
#ifndef HAVE_STPCPY
char *
stpcpy(char *a,const char *b)
{
while( *b )
*a++ = *b++;
*a = 0;
return (char*)a;
}
#endif
#ifndef HAVE_STRSEP
/* code taken from glibc-2.2.1/sysdeps/generic/strsep.c */
char *
strsep (char **stringp, const char *delim)
{
char *begin, *end;
begin = *stringp;
if (begin == NULL)
return NULL;
/* A frequent case is when the delimiter string contains only one
character. Here we don't need to call the expensive `strpbrk'
function and instead work using `strchr'. */
if (delim[0] == '\0' || delim[1] == '\0')
{
char ch = delim[0];
if (ch == '\0')
end = NULL;
else
{
if (*begin == ch)
end = begin;
else if (*begin == '\0')
end = NULL;
else
end = strchr (begin + 1, ch);
}
}
else
/* Find the end of the token. */
end = strpbrk (begin, delim);
if (end)
{
/* Terminate the token and set *STRINGP past NUL character. */
*end++ = '\0';
*stringp = end;
}
else
/* No more delimiters; this is the last token. */
*stringp = NULL;
return begin;
}
#endif /*HAVE_STRSEP*/
#ifndef HAVE_STRLWR
char *
strlwr(char *s)
{
char *p;
for(p=s; *p; p++ )
*p = tolower(*p);
return s;
}
#endif
#ifndef HAVE_STRCASECMP
int
strcasecmp( const char *a, const char *b )
{
for( ; *a && *b; a++, b++ ) {
if( *a != *b && toupper(*a) != toupper(*b) )
break;
}
return *(const byte*)a - *(const byte*)b;
}
#endif
#ifndef HAVE_STRNCASECMP
int
strncasecmp( const char *a, const char *b, size_t n )
{
for( ; n && *a && *b; a++, b++, n--) {
if( *a != *b && toupper(*a) != toupper(*b) )
break;
}
if (!n)
return 0;
return *(const byte*)a - *(const byte*)b;
}
#endif
#ifdef __MINGW32__
/*
* Like vsprintf but provides a pointer to malloc'd storage, which
* must be freed by the caller (m_free). Taken from libiberty as
* found in gcc-2.95.2 and a little bit modernized.
* FIXME: Write a new CRT for W32.
*/
int
vasprintf ( char **result, const char *format, va_list args)
{
const char *p = format;
/* Add one to make sure that it is never zero, which might cause malloc
to return NULL. */
int total_width = strlen (format) + 1;
va_list ap;
/* this is not really portable but works under Windows */
memcpy ( &ap, &args, sizeof (va_list));
while (*p != '\0')
{
if (*p++ == '%')
{
while (strchr ("-+ #0", *p))
++p;
if (*p == '*')
{
++p;
total_width += abs (va_arg (ap, int));
}
else
{
char *endp;
total_width += strtoul (p, &endp, 10);
p = endp;
}
if (*p == '.')
{
++p;
if (*p == '*')
{
++p;
total_width += abs (va_arg (ap, int));
}
else
{
char *endp;
total_width += strtoul (p, &endp, 10);
p = endp;
}
}
while (strchr ("hlL", *p))
++p;
/* Should be big enough for any format specifier except %s
and floats. */
total_width += 30;
switch (*p)
{
case 'd':
case 'i':
case 'o':
case 'u':
case 'x':
case 'X':
case 'c':
(void) va_arg (ap, int);
break;
case 'f':
case 'e':
case 'E':
case 'g':
case 'G':
(void) va_arg (ap, double);
/* Since an ieee double can have an exponent of 307, we'll
make the buffer wide enough to cover the gross case. */
total_width += 307;
case 's':
total_width += strlen (va_arg (ap, char *));
break;
case 'p':
case 'n':
(void) va_arg (ap, char *);
break;
}
}
}
*result = m_alloc (total_width);
if (*result != NULL)
return vsprintf (*result, format, args);
else
return 0;
}
#endif /*__MINGW32__*/
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