mirror of
git://git.gnupg.org/gnupg.git
synced 2024-06-07 23:27:48 +02:00
c0c2c58054
to libgcrypt functions, using shared error codes from libgpg-error, replacing the old functions we used to have in ../util by those in ../jnlib and ../common, renaming the malloc functions and a couple of types. Note, that not all changes are listed below becuause they are too similar and done at far too many places. As of today the code builds using the current libgcrypt from CVS but it is very unlikely that it actually works.
630 lines
13 KiB
C
630 lines
13 KiB
C
/* stringhelp.c - standard string helper functions
|
||
* Copyright (C) 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 <config.h>
|
||
#include <stdlib.h>
|
||
#include <string.h>
|
||
#include <stdarg.h>
|
||
#include <ctype.h>
|
||
|
||
#include "libjnlib-config.h"
|
||
#include "utf8conv.h"
|
||
#include "stringhelp.h"
|
||
|
||
|
||
/****************
|
||
* 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 jnlib_xmalloc 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 = jnlib_xmalloc( 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 ;
|
||
}
|
||
|
||
/****************
|
||
* remove trailing white spaces
|
||
*/
|
||
char *
|
||
trim_trailing_spaces( char *string )
|
||
{
|
||
char *p, *mark;
|
||
|
||
for( mark = NULL, p = string; *p; p++ ) {
|
||
if( isspace( *(byte*)p ) ) {
|
||
if( !mark )
|
||
mark = p;
|
||
}
|
||
else
|
||
mark = NULL;
|
||
}
|
||
if( mark )
|
||
*mark = '\0' ;
|
||
|
||
return string ;
|
||
}
|
||
|
||
|
||
unsigned
|
||
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" );
|
||
}
|
||
|
||
size_t
|
||
length_sans_trailing_chars (const unsigned char *line, size_t len,
|
||
const char *trimchars )
|
||
{
|
||
const unsigned char *p, *mark;
|
||
size_t 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
|
||
*/
|
||
size_t
|
||
length_sans_trailing_ws (const unsigned char *line, size_t len)
|
||
{
|
||
return length_sans_trailing_chars (line, len, " \t\r\n");
|
||
}
|
||
|
||
|
||
|
||
/***************
|
||
* Extract from a given path the filename component.
|
||
*
|
||
*/
|
||
char *
|
||
make_basename(const char *filepath)
|
||
{
|
||
char *p;
|
||
|
||
if ( !(p=strrchr(filepath, '/')) )
|
||
#ifdef HAVE_DRIVE_LETTERS
|
||
if ( !(p=strrchr(filepath, '\\')) )
|
||
if ( !(p=strrchr(filepath, ':')) )
|
||
#endif
|
||
{
|
||
return jnlib_xstrdup(filepath);
|
||
}
|
||
|
||
return jnlib_xstrdup(p+1);
|
||
}
|
||
|
||
|
||
|
||
/***************
|
||
* Extract from a given filename the path prepended to it.
|
||
* If their isn't a path prepended to the filename, a dot
|
||
* is returned ('.').
|
||
*
|
||
*/
|
||
char *
|
||
make_dirname(const char *filepath)
|
||
{
|
||
char *dirname;
|
||
int dirname_length;
|
||
char *p;
|
||
|
||
if ( !(p=strrchr(filepath, '/')) )
|
||
#ifdef HAVE_DRIVE_LETTERS
|
||
if ( !(p=strrchr(filepath, '\\')) )
|
||
if ( !(p=strrchr(filepath, ':')) )
|
||
#endif
|
||
{
|
||
return jnlib_xstrdup(".");
|
||
}
|
||
|
||
dirname_length = p-filepath;
|
||
dirname = jnlib_xmalloc(dirname_length+1);
|
||
strncpy(dirname, filepath, dirname_length);
|
||
dirname[dirname_length] = 0;
|
||
|
||
return dirname;
|
||
}
|
||
|
||
|
||
|
||
/****************
|
||
* Construct a filename from the NULL terminated list of parts.
|
||
* Tilde expansion is done here.
|
||
*/
|
||
char *
|
||
make_filename( const char *first_part, ... )
|
||
{
|
||
va_list arg_ptr ;
|
||
size_t n;
|
||
const char *s;
|
||
char *name, *home, *p;
|
||
|
||
va_start( arg_ptr, first_part ) ;
|
||
n = strlen(first_part)+1;
|
||
while( (s=va_arg(arg_ptr, const char *)) )
|
||
n += strlen(s) + 1;
|
||
va_end(arg_ptr);
|
||
|
||
home = NULL;
|
||
if( *first_part == '~' && first_part[1] == '/'
|
||
&& (home = getenv("HOME")) && *home )
|
||
n += strlen(home);
|
||
|
||
name = jnlib_xmalloc(n);
|
||
p = home ? stpcpy(stpcpy(name,home), first_part+1)
|
||
: stpcpy(name, first_part);
|
||
va_start( arg_ptr, first_part ) ;
|
||
while( (s=va_arg(arg_ptr, const char *)) )
|
||
p = stpcpy(stpcpy(p,"/"), s);
|
||
va_end(arg_ptr);
|
||
|
||
return name;
|
||
}
|
||
|
||
|
||
int
|
||
compare_filenames( const char *a, const char *b )
|
||
{
|
||
/* ? check whether this is an absolute filename and
|
||
* resolve symlinks?
|
||
*/
|
||
#ifdef HAVE_DRIVE_LETTERS
|
||
return stricmp(a,b);
|
||
#else
|
||
return strcmp(a,b);
|
||
#endif
|
||
}
|
||
|
||
/* Print a BUFFER to stream FP while replacing all control characters
|
||
and the character DELIM with standard C escape sequences. Returns
|
||
the number of characters printed. */
|
||
size_t
|
||
print_sanitized_buffer (FILE *fp, const void *buffer, size_t length,
|
||
int delim)
|
||
{
|
||
const unsigned char *p = buffer;
|
||
size_t count = 0;
|
||
|
||
for (; length; length--, p++, count++)
|
||
{
|
||
if (*p < 0x20 || (*p >= 0x7f && *p < 0xa0) || *p == delim)
|
||
{
|
||
putc ('\\', fp);
|
||
count++;
|
||
if (*p == '\n')
|
||
putc ('n', fp);
|
||
else if (*p == '\r')
|
||
putc ('r', fp);
|
||
else if (*p == '\f')
|
||
putc ('f', fp);
|
||
else if (*p == '\v')
|
||
putc ('v', fp);
|
||
else if (*p == '\b')
|
||
putc ('b', fp);
|
||
else if (!*p)
|
||
putc('0', fp);
|
||
else
|
||
{
|
||
fprintf (fp, "x%02x", *p);
|
||
count += 2;
|
||
}
|
||
}
|
||
else
|
||
putc (*p, fp);
|
||
}
|
||
|
||
return count;
|
||
}
|
||
|
||
size_t
|
||
print_sanitized_utf8_buffer (FILE *fp, const void *buffer,
|
||
size_t length, int delim)
|
||
{
|
||
const char *p = buffer;
|
||
size_t i;
|
||
|
||
/* We can handle plain ascii simpler, so check for it first. */
|
||
for (i=0; i < length; i++ )
|
||
{
|
||
if ( (p[i] & 0x80) )
|
||
break;
|
||
}
|
||
if (i < length)
|
||
{
|
||
char *buf = utf8_to_native (p, length, delim);
|
||
/*(utf8 conversion already does the control character quoting)*/
|
||
i = strlen (buf);
|
||
fputs (buf, fp);
|
||
jnlib_free (buf);
|
||
return i;
|
||
}
|
||
else
|
||
return print_sanitized_buffer (fp, p, length, delim);
|
||
}
|
||
|
||
|
||
size_t
|
||
print_sanitized_string (FILE *fp, const char *string, int delim)
|
||
{
|
||
return string? print_sanitized_buffer (fp, string, strlen (string), delim):0;
|
||
}
|
||
|
||
size_t
|
||
print_sanitized_utf8_string (FILE *fp, const char *string, int delim)
|
||
{
|
||
/* FIXME: convert to local characterset */
|
||
return print_sanitized_string (fp, string, delim);
|
||
}
|
||
|
||
/* Create a string from the buffer P of length N which is suitable for
|
||
printing. Caller must release the created string using xfree. */
|
||
char *
|
||
sanitize_buffer (const unsigned char *p, size_t n, int delim)
|
||
{
|
||
size_t save_n, buflen;
|
||
const byte *save_p;
|
||
char *buffer, *d;
|
||
|
||
/* first count length */
|
||
for (save_n = n, save_p = p, buflen=1 ; n; n--, p++ )
|
||
{
|
||
if ( *p < 0x20 || (*p >= 0x7f && *p < 0xa0) || *p == delim
|
||
|| (delim && *p=='\\'))
|
||
{
|
||
if ( *p=='\n' || *p=='\r' || *p=='\f'
|
||
|| *p=='\v' || *p=='\b' || !*p )
|
||
buflen += 2;
|
||
else
|
||
buflen += 4;
|
||
}
|
||
else
|
||
buflen++;
|
||
}
|
||
p = save_p;
|
||
n = save_n;
|
||
/* and now make the string */
|
||
d = buffer = jnlib_xmalloc( buflen );
|
||
for ( ; n; n--, p++ )
|
||
{
|
||
if (*p < 0x20 || (*p >= 0x7f && *p < 0xa0) || *p == delim
|
||
||(delim && *p=='\\')) {
|
||
*d++ = '\\';
|
||
if( *p == '\n' )
|
||
*d++ = 'n';
|
||
else if( *p == '\r' )
|
||
*d++ = 'r';
|
||
else if( *p == '\f' )
|
||
*d++ = 'f';
|
||
else if( *p == '\v' )
|
||
*d++ = 'v';
|
||
else if( *p == '\b' )
|
||
*d++ = 'b';
|
||
else if( !*p )
|
||
*d++ = '0';
|
||
else {
|
||
sprintf(d, "x%02x", *p );
|
||
d += 2;
|
||
}
|
||
}
|
||
else
|
||
*d++ = *p;
|
||
}
|
||
*d = 0;
|
||
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_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;
|
||
}
|
||
|
||
int
|
||
ascii_strcmp( const char *a, const char *b )
|
||
{
|
||
if (a == b)
|
||
return 0;
|
||
|
||
for (; *a && *b; a++, b++) {
|
||
if (*a != *b )
|
||
break;
|
||
}
|
||
return *a == *b? 0 : (*(signed char *)a - *(signed char *)b);
|
||
}
|
||
|
||
|
||
void *
|
||
ascii_memcasemem (const void *haystack, size_t nhaystack,
|
||
const void *needle, size_t nneedle)
|
||
{
|
||
|
||
if (!nneedle)
|
||
return (void*)haystack; /* finding an empty needle is really easy */
|
||
if (nneedle <= nhaystack)
|
||
{
|
||
const unsigned char *a = haystack;
|
||
const unsigned char *b = a + nhaystack - nneedle;
|
||
|
||
for (; a <= b; a++)
|
||
{
|
||
if ( !ascii_memcasecmp (a, needle, nneedle) )
|
||
return (void *)a;
|
||
}
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
/*********************************************
|
||
********** 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_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
|
||
|
||
|
||
/****************
|
||
* mingw32/cpd has a memicmp()
|
||
*/
|
||
#ifndef HAVE_MEMICMP
|
||
int
|
||
memicmp( const char *a, const char *b, size_t n )
|
||
{
|
||
for( ; n; n--, a++, b++ )
|
||
if( *a != *b && toupper(*(const byte*)a) != toupper(*(const byte*)b) )
|
||
return *(const byte *)a - *(const byte*)b;
|
||
return 0;
|
||
}
|
||
#endif
|