/* strgutil.c - string utilities * Copyright (C) 1994, 1998, 1999, 2000, 2001, * 2003 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 #include #include #include #ifdef HAVE_LANGINFO_CODESET #include #endif #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' angehängt. Ist n = 0, so geschieht nichts, ist Destination * gleich NULL, so wird via m_alloc Speicher besorgt, ist dann nicht * genügend 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 (!newset) #ifdef HAVE_LANGINFO_CODESET newset = nl_langinfo (CODESET); #else newset = "8859-1"; #endif if (strlen (newset) > 3 && !ascii_memcasecmp (newset, "iso", 3)) { newset += 3; if (*newset == '-' || *newset == '_') newset++; } if( !*newset || !ascii_strcasecmp (newset, "8859-1" ) || !ascii_strcasecmp (newset, "8859-15" ) ) { active_charset_name = "iso-8859-1"; no_translation = 0; active_charset = NULL; } else if( !ascii_strcasecmp( newset, "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) { const unsigned char *p1 = (const unsigned char *)a; const unsigned char *p2 = (const unsigned char *)b; unsigned char c1, c2; if (p1 == p2) return 0; do { c1 = ascii_tolower (*p1); c2 = ascii_tolower (*p2); if (c1 == '\0') break; ++p1; ++p2; } while (c1 == c2); return c1 - c2; } int ascii_strncasecmp (const char *a, const char *b, size_t n) { const unsigned char *p1 = (const unsigned char *)a; const unsigned char *p2 = (const unsigned char *)b; unsigned char c1, c2; if (p1 == p2 || !n ) return 0; do { c1 = ascii_tolower (*p1); c2 = ascii_tolower (*p2); if ( !--n || c1 == '\0') break; ++p1; ++p2; } while (c1 == c2); return c1 - c2; } 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(*(unsigned char *)p); return s; } #endif #ifndef HAVE_STRCASECMP int strcasecmp( const char *a, const char *b ) { for( ; *a && *b; a++, b++ ) { if( *a != *b && toupper(*(const byte *)a) != toupper(*(const byte *)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(*(const byte *)a) != toupper(*(const byte *)b) ) break; } if (!n) return 0; return *(const byte*)a - *(const byte*)b; } #endif #ifdef _WIN32 /* * 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; } int asprintf (char **buf, const char *fmt, ...) { int status; va_list ap; va_start (ap, fmt); status = vasprintf (buf, fmt, ap); va_end (ap); return status; } #endif /*_WIN32*/