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/* _PDCLIB_strtok( char *, rsize_t *, const char *, char ** )
This file is part of the Public Domain C Library (PDCLib).
Permission is granted to use, modify, and / or redistribute at will.
*/
#ifndef REGTEST
#define __STDC_WANT_LIB_EXT1__ 1
#include <string.h>
#include <stdint.h>
#include <stdlib.h>
char * _PDCLIB_strtok( char * _PDCLIB_restrict s1, rsize_t * _PDCLIB_restrict s1max, const char * _PDCLIB_restrict s2, char ** _PDCLIB_restrict ptr )
{
const char * p = s2;
if ( s1max == NULL || s2 == NULL || ptr == NULL || ( s1 == NULL && *ptr == NULL ) || *s1max > RSIZE_MAX )
{
_PDCLIB_constraint_handler( _PDCLIB_CONSTRAINT_VIOLATION( _PDCLIB_EINVAL ) );
return NULL;
}
if ( s1 != NULL )
{
/* new string */
*ptr = s1;
}
else
{
/* old string continued */
if ( *ptr == NULL )
{
/* No old string, no new string, nothing to do */
return NULL;
}
s1 = *ptr;
}
/* skip leading s2 characters */
while ( *p && *s1 )
{
if ( *s1 == *p )
{
/* found separator; skip and start over */
if ( *s1max == 0 )
{
_PDCLIB_constraint_handler( _PDCLIB_CONSTRAINT_VIOLATION( _PDCLIB_EINVAL ) );
return NULL;
}
++s1;
--( *s1max );
p = s2;
continue;
}
++p;
}
if ( ! *s1 )
{
/* no more to parse */
*ptr = s1;
return NULL;
}
/* skipping non-s2 characters */
*ptr = s1;
while ( **ptr )
{
p = s2;
while ( *p )
{
if ( **ptr == *p++ )
{
/* found separator; overwrite with '\0', position *ptr, return */
if ( *s1max == 0 )
{
_PDCLIB_constraint_handler( _PDCLIB_CONSTRAINT_VIOLATION( _PDCLIB_EINVAL ) );
return NULL;
}
--( *s1max );
*( ( *ptr )++ ) = '\0';
return s1;
}
}
if ( *s1max == 0 )
{
_PDCLIB_constraint_handler( _PDCLIB_CONSTRAINT_VIOLATION( _PDCLIB_EINVAL ) );
return NULL;
}
--( *s1max );
++( *ptr );
}
/* parsed to end of string */
return s1;
}
#endif
#ifdef TEST
#include "_PDCLIB_test.h"
#ifndef REGTEST
static int HANDLER_CALLS = 0;
static void test_handler( const char * _PDCLIB_restrict msg, void * _PDCLIB_restrict ptr, errno_t error )
{
++HANDLER_CALLS;
}
#endif
int main( void )
{
#ifndef REGTEST
/* The original PDCLib strtok() test */
char s[] = "_a_bc__d_";
rsize_t max = strlen( s );
char * p;
TESTCASE( _PDCLIB_strtok( s, &max, "_", &p ) == &s[1] );
TESTCASE( max == 6 );
TESTCASE( s[1] == 'a' );
TESTCASE( s[2] == '\0' );
TESTCASE( _PDCLIB_strtok( NULL, &max, "_", &p ) == &s[3] );
TESTCASE( max == 3 );
TESTCASE( s[3] == 'b' );
TESTCASE( s[4] == 'c' );
TESTCASE( s[5] == '\0' );
TESTCASE( _PDCLIB_strtok( NULL, &max, "_", &p ) == &s[7] );
TESTCASE( max == 0 );
TESTCASE( s[6] == '_' );
TESTCASE( s[7] == 'd' );
TESTCASE( s[8] == '\0' );
TESTCASE( _PDCLIB_strtok( NULL, &max, "_", &p ) == NULL );
TESTCASE( max == 0 );
strcpy( s, "ab_cd" );
max = strlen( s );
TESTCASE( _PDCLIB_strtok( s, &max, "_", &p ) == &s[0] );
TESTCASE( s[0] == 'a' );
TESTCASE( s[1] == 'b' );
TESTCASE( s[2] == '\0' );
TESTCASE( _PDCLIB_strtok( NULL, &max, "_", &p ) == &s[3] );
TESTCASE( s[3] == 'c' );
TESTCASE( s[4] == 'd' );
TESTCASE( s[5] == '\0' );
TESTCASE( _PDCLIB_strtok( NULL, &max, "_", &p ) == NULL );
/* Testing the constraint handling */
strcpy( s, "ab.cd" );
max = 2;
TESTCASE( set_constraint_handler_s( test_handler ) == abort_handler_s );
TESTCASE( _PDCLIB_strtok( s, &max, ".", &p ) == NULL );
TESTCASE( HANDLER_CALLS == 1 );
{
/* The strtok_s() example code from the standard */
char str1[] = "?a???b,,,#c";
char str2[] = "\t \t";
rsize_t max1 = strlen( str1 );
rsize_t max2 = strlen( str2 );
char * ptr1;
char * ptr2;
TESTCASE( _PDCLIB_strtok( str1, &max1, "?", &ptr1 ) == &str1[1] );
TESTCASE( _PDCLIB_strtok( NULL, &max1, ",", &ptr1 ) == &str1[3] );
TESTCASE( _PDCLIB_strtok( str2, &max2, " \t", &ptr2 ) == NULL );
TESTCASE( _PDCLIB_strtok( NULL, &max1, "#,", &ptr1 ) == &str1[10] );
TESTCASE( _PDCLIB_strtok( NULL, &max1, "?", &ptr1 ) == NULL );
}
#endif
return TEST_RESULTS;
}
#endif
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