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/*
clsync - file tree sync utility based on inotify/kqueue/bsm
Copyright (C) 2014 Dmitry Yu Okunev <dyokunev@ut.mephi.ru> 0x8E30679C
This program 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 3 of the License, or
(at your option) any later version.
This program 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, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h> // free()
#include <string.h> // strtok_r()
#include <errno.h> // errno
#include "malloc.h"
#include "error.h"
static int _str_splitargs (
char *ptr,
char **arg_start_p,
int quotes,
int ( *handler ) ( char *, size_t, void * ),
char *additional_arg
)
{
char *arg_start, *arg;
size_t arg_len;
int rc;
arg_start = *arg_start_p;
*arg_start_p = &ptr[1];
arg_len = ptr - arg_start;
if ( arg_len == 0 ) // Skipping nearby spaces
return 0;
arg = xmalloc ( arg_len + 1 );
if ( quotes ) {
size_t s, d;
s = d = 0;
while ( s < arg_len ) {
if ( arg_start[s] )
arg[d++] = arg_start[s];
s++;
}
arg_len = d;
} else
memcpy ( arg, arg_start, arg_len );
#ifdef _DEBUG
debug ( 15, "%p %p %i: <%s>", arg_start, ptr, arg_len, arg );
#endif
arg[arg_len] = 0;
if ( ( rc = handler ( arg, arg_len, additional_arg ) ) ) {
free ( arg );
return rc;
}
return 0;
}
int str_splitargs (
char *_instr,
int ( *handler ) ( char *, size_t, void * ),
void *arg
)
{
debug ( 9, "" );
char *arg_start, *ptr, *instr;
int quotes = 0;
instr = strdup ( _instr );
ptr = instr;
arg_start = instr;
while ( 1 ) {
ptr = strpbrk ( ptr, " \t\"\'" );
#ifdef _DEBUG
debug ( 10, "ptr == %p", ptr );
#endif
if ( ptr == NULL )
break;
#ifdef _DEBUG
debug ( 10, "*ptr == \"%c\" (%i)", *ptr, *ptr );
#endif
switch ( * ( ptr++ ) ) {
case ' ':
case '\t': {
int rc;
if ( ( rc = _str_splitargs ( &ptr[-1], &arg_start, quotes, handler, arg ) ) )
return rc;
quotes = 0;
break;
}
case '"':
ptr[-1] = 0;
quotes++;
while ( ( ptr = strchr ( ptr, '"' ) ) != NULL ) {
// Checking for escaping
char *p;
p = &ptr[-1];
while ( *p == '\\' ) {
p--;
#ifdef PARANOID
if ( p < instr )
critical ( "Dangerous internal error" );
#endif
}
if ( ( ptr - p ) % 2 )
break;
}
if ( ptr == NULL ) {
errno = EINVAL;
error ( "Unterminated quote <\"> in string: <%s>", instr );
return errno;
}
*ptr = 0;
quotes++;
ptr++;
break;
case '\'':
ptr[-1] = 0;
quotes++;
ptr = strchr ( ptr, '\'' );
if ( ptr == NULL ) {
errno = EINVAL;
error ( "Unterminated quote <'> in string: <%s>", instr );
return errno;
}
*ptr = 0;
quotes++;
ptr++;
break;
}
}
int rc = _str_splitargs ( strchr ( arg_start, 0 ), &arg_start, quotes, handler, arg );
free ( instr );
return rc;
}
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