/* $Id$ */

/* sscanf( const char *, const char *, ... )

   This file is part of the Public Domain C Library (PDCLib).
   Permission is granted to use, modify, and / or redistribute at will.
*/

#include <stdio.h>
#include <stdarg.h>

#ifndef REGTEST

int sscanf( const char * _PDCLIB_restrict s, const char * _PDCLIB_restrict format, ... )
{
    int rc;
    va_list ap;
    va_start( ap, format );
    rc = vsscanf( s, format, ap );
    va_end( ap );
    return rc;
}

#endif

#ifdef TEST
#include <_PDCLIB_test.h>

#include <string.h>
#include <limits.h>

#define symbol2value( x ) #x
#define symbol2string( x ) symbol2value( x )

#define CHECK_TRUE( a ) do { if ( a == 0 ) { fprintf( stderr, "Unexpected failure in " symbol2string( __LINE__ ) ": '" #a "' evaluated to false.\n" ); rc += 1; } } while ( 0 )
#define CHECK_FALSE( a ) do { if ( a != 0 ) { fprintf( stderr, "Unexpected failure in " symbol2string( __LINE__ ) ": '" #a "' evaluated to true.\n" ); rc += 1; } } while ( 0 )
#define CHECK_EQUAL( a, b ) do { int x = a; int y = b; if ( x != y ) { fprintf( stderr, "Mismatch in " symbol2string( __LINE__ ) ": result is %d, expected %d.\n", x, y ); rc += 1; } } while ( 0 )
#define CHECK_FEQUAL( a, b, T, F ) do { T x = a; T y = b; if ( x != y ) { fprintf( stderr, "Mismatch in " symbol2string( __LINE__ ) ": result is " F ", expected " F ".\n", x, y ); rc += 1; } } while ( 0 )

// literal matches, character matches, and basic integer matches
void suite_one( void );
// decimal integer matches
void suite_two( void );
// hexadecimal integer matches
void suite_three( void );
// octal integer matches
void suite_four( void );
// string matches
void suite_five( void );

int main()
{
    suite_one();
    suite_two();
    suite_three();
    suite_four();
    suite_five();
}

// literal matches, character matches, and basic integer matches
void suite_one()
{
    char const * string = "12345678901\0003-5+7\0009\3772 4 6 8 0\3771 \011 5%%  0";
    CHECK_EQUAL( string[39], '0' );

    // -----------------------------------------------------------------------
    // Literal matching
    // -----------------------------------------------------------------------
    {
    // matching six characters literally
    // checking via %n
    // should report six characters read
    int n;
    CHECK_EQUAL( sscanf( string + 0, "123456%n", &n ), 0 );
    CHECK_EQUAL( n, 6 );
    }
    {
    // matching a character, three whitespace chars, and another character
    // checking via %n
    // should report five characters read
    int n;
    CHECK_EQUAL( sscanf( string + 30, "1 5%n", &n ), 0 );
    CHECK_EQUAL( n, 5 );
    }
    {
    // matching three characters, not matching whitespaces, and matching another three characters
    // checking via %n
    // should report six characters matched
    int n;
    CHECK_EQUAL( sscanf( string + 0, "123  456%n", &n ), 0 );
    CHECK_EQUAL( n, 6 );
    }
    {
    // matching a character, two '%' characters, and two whitespaces
    // checking via %n
    // should report five characters matched
    int n;
    CHECK_EQUAL( sscanf( string + 34, "5%%%% %n", &n ), 0 );
    CHECK_EQUAL( n, 5 );
    }
    {
    // seeking to last character in file, trying to match that char and a whitespace
    // checking via %n
    // should report one character matched and EOF
    int n;
    CHECK_EQUAL( sscanf( string + 39, "0 %n", &n ), 0 );
    CHECK_EQUAL( n, 1 );
    }
    {
    // seeking to end of file, trying to match a -1
    // checking via %n
    // should report error, not executing %n
    int n = -1;
    CHECK_EQUAL( sscanf( string + 0, "\377%n", &n ), 0 );
    CHECK_EQUAL( n, -1 );
    }

    // -----------------------------------------------------------------------
    // Character matching ('%c')
    // -----------------------------------------------------------------------
    {
    // reading a char array of specified width, including zero bytes
    // should report the characters read up to first zero
    char buffer[ 8 ];
    memset( buffer, '\177', 8 );
    CHECK_EQUAL( sscanf( string + 10, "%7c", buffer ), 1 );
    CHECK_FALSE( memcmp( buffer, "1\177\177", 3 ) );
    }
    {
    // reading a char array of unspecified width when positioned at -1 value 
    // should default to width one, read the -1 value, no zero termination of the array
    char buffer[ 2 ];
    memset( buffer, '\177', 2 );
    CHECK_EQUAL( sscanf( string + 19, "%c", buffer ), 1 );
    CHECK_FALSE( memcmp( buffer, "\377\177", 2 ) );
    }
    {
    // reading a char array of specified width 1 when positioned at (non-space) whitespace
    // should read the whitespace (literally), no zero termination of the array
    char buffer[ 2 ];
    memset( buffer, '\177', 2 );
    CHECK_EQUAL( sscanf( string + 32, "%1c", buffer ), 1 );
    CHECK_FALSE( memcmp( buffer, "\011\177", 2 ) );
    }
    {
    // reading a char array of specified width 2 when positioned at last char of file
    // should read the character, and report EOF
    char buffer[ 2 ];
    memset( buffer, '\177', 2 );
    CHECK_EQUAL( sscanf( string + 39, "%2c", buffer ), 1 );
    CHECK_FALSE( memcmp( buffer, "0\177", 2 ) );
    }
    {
    // reading a char array of specified width 1 when positioned at last char of file
    // should read the character, and NOT report EOF
    char buffer[ 2 ];
    memset( buffer, '\177', 2 );
    CHECK_EQUAL( sscanf( string + 39, "%1c", buffer ), 1 );
    CHECK_FALSE( memcmp( buffer, "0\177", 2 ) );
    }
    {
    // reading a char array of specified width 1 when positioned at EOF
    // should report input error before any conversion (-1)
    char buffer[ 2 ];
    memset( buffer, '\177', 2 );
    CHECK_EQUAL( sscanf( string + 40, "%1c", buffer ), -1 );
    CHECK_FALSE( memcmp( buffer, "\177\177", 2 ) );
    }

    // -----------------------------------------------------------------------
    // Integer matching ('%d')
    // -----------------------------------------------------------------------
    {
    // reading a whitespace-terminated integer
    int i;
    int n;
    CHECK_EQUAL( sscanf( string + 20, "%d%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 2 );
    CHECK_EQUAL( n, 1 );
    }
    {
    // reading a -1 terminated integer
    int i;
    int n;
    CHECK_EQUAL( sscanf( string + 18, "%d%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 9 );
    CHECK_EQUAL( n, 1 );
    }
    {
    // reading a EOF terminated integer
    int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 39, "%d%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 1 );
    }
    {
    // trying to read an integer when positioned at whitespace
    // should skip whitespaces
    int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 32, "%d%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 5 );
    CHECK_EQUAL( n, 3 );
    }
    {
    // trying to read an integer when positioned at -1 value
    // should report matching failure
    int i = 0;
    int n = -1;
    CHECK_EQUAL( sscanf( string + 19, "%d%n", &i, &n ), 0 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, -1 );
    }
    {
    // trying to read an integer when positioned at EOF
    // should report reading failure
    int i = 0;
    int n = -1;
    CHECK_EQUAL( sscanf( string + 40, "%d%n", &i, &n ), -1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, -1 );
    }
    {
    // reading a '-'-prefixed integer
    int i;
    int n;
    CHECK_EQUAL( sscanf( string + 13, "%d%n", &i, &n ), 1 );
    CHECK_EQUAL( i, -5 );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading a '+'-prefixed integer
    int i;
    int n;
    CHECK_EQUAL( sscanf( string + 15, "%d%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 7 );
    CHECK_EQUAL( n, 2 );
    }
}

// decimal integer matches
void suite_two()
{
    char const * string = "-0 +0 -128 +127 +255 -32768 +32767 +65535\n"
                          "-2147483648 +2147483647 +4294967295\n"
                          "-9223372036854775808 +9223372036854775807\n"
                          "+18446744073709551615\n";
    CHECK_EQUAL( string[141], '\n' );
    {
    // reading 0, d
    signed char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 1, "%hhd%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 1 );
    }
    {
    // reading -0, d
    signed char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%hhd%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading +0, d
    signed char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 3, "%hhd%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading -128, d
    signed char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 6, "%hhd%n", &i, &n ), 1 );
    CHECK_EQUAL( i, -128 );
    CHECK_EQUAL( n, 4 );
    }
    {
    // reading 127, d
    signed char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 12, "%hhd%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 127 );
    CHECK_EQUAL( n, 3 );
    }
    {
    // reading +127, d
    signed char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 11, "%hhd%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 127 );
    CHECK_EQUAL( n, 4 );
    }
    {
    // reading 0, u
    unsigned char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 1, "%hhu%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 1 );
    }
    {
    // reading -0, u
    unsigned char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%hhu%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading +0, u
    unsigned char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 3, "%hhu%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading 127, u
    unsigned char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 12, "%hhu%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 127 );
    CHECK_EQUAL( n, 3 );
    }
    {
    // reading +127, u
    unsigned char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 11, "%hhu%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 127 );
    CHECK_EQUAL( n, 4 );
    }
    {
    // reading 255, u
    unsigned char i = 0;
    int n;
    CHECK_EQUAL( sscanf( string + 17, "%hhu%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 255 );
    CHECK_EQUAL( n, 3 );
    }
    {
    // reading +255, u
    unsigned char i = 0;
    int n;
    CHECK_EQUAL( sscanf( string + 16, "%hhu%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 255 );
    CHECK_EQUAL( n, 4 );
    }
    {
    // reading 0, i
    signed char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 1, "%hhi%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 1 );
    }
    {
    // reading -0, i
    signed char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%hhi%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading +0, i
    signed char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 3, "%hhi%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading -128, i
    signed char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 6, "%hhi%n", &i, &n ), 1 );
    CHECK_EQUAL( i, -128 );
    CHECK_EQUAL( n, 4 );
    }
    {
    // reading 127, i
    signed char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 12, "%hhi%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 127 );
    CHECK_EQUAL( n, 3 );
    }
    {
    // reading +127, i
    signed char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 11, "%hhi%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 127 );
    CHECK_EQUAL( n, 4 );
    }
    {
    // reading 0, d
    signed short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 1, "%hd%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 1 );
    }
    {
    // reading -0, d
    signed short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%hd%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading +0, d
    signed short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 3, "%hd%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading -32768, d
    signed short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 21, "%hd%n", &i, &n ), 1 );
    CHECK_EQUAL( i, -32768 );
    CHECK_EQUAL( n, 6 );
    }
    {
    // reading 32767, d
    signed short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 29, "%hd%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 32767 );
    CHECK_EQUAL( n, 5 );
    }
    {
    // reading +32767, d
    signed short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 28, "%hd%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 32767 );
    CHECK_EQUAL( n, 6 );
    }
    {
    // reading 0, u
    unsigned short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 1, "%hu%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 1 );
    }
    {
    // reading -0, u
    unsigned short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%hu%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading +0, u
    unsigned short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 3, "%hu%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading 32767, u
    unsigned short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 29, "%hu%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 32767 );
    CHECK_EQUAL( n, 5 );
    }
    {
    // reading +32767, u
    unsigned short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 28, "%hu%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 32767 );
    CHECK_EQUAL( n, 6 );
    }
    {
    // reading 65535, u
    unsigned short i = 0;
    int n;
    CHECK_EQUAL( sscanf( string + 36, "%hu%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 65535 );
    CHECK_EQUAL( n, 5 );
    }
    {
    // reading +65535, u
    unsigned short i = 0;
    int n;
    CHECK_EQUAL( sscanf( string + 35, "%hu%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 65535 );
    CHECK_EQUAL( n, 6 );
    }
    {
    // reading 0, i
    signed short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 1, "%hi%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 1 );
    }
    {
    // reading -0, i
    signed short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%hi%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading +0, i
    signed short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 3, "%hi%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading -32768, i
    signed short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 21, "%hi%n", &i, &n ), 1 );
    CHECK_EQUAL( i, -32768 );
    CHECK_EQUAL( n, 6 );
    }
    {
    // reading 32767, i
    signed short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 29, "%hi%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 32767 );
    CHECK_EQUAL( n, 5 );
    }
    {
    // reading +32767, i
    signed short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 28, "%hi%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 32767 );
    CHECK_EQUAL( n, 6 );
    }
    {
    // reading 0, d
    signed int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 1, "%d%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 1 );
    }
    {
    // reading -0, d
    signed int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%d%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading +0, d
    signed int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 3, "%d%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading -2147483648, d
    signed int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 42, "%d%n", &i, &n ), 1 );
    CHECK_EQUAL( i, -2147483648 );
    CHECK_EQUAL( n, 11 );
    }
    {
    // reading 2147483647, d
    signed int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 55, "%d%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 2147483647 );
    CHECK_EQUAL( n, 10 );
    }
    {
    // reading +2147483647, d
    signed int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 54, "%d%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 2147483647 );
    CHECK_EQUAL( n, 11 );
    }
    {
    // reading 0, u
    unsigned int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 1, "%u%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 1 );
    }
    {
    // reading -0, u
    unsigned int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%u%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading +0, u
    unsigned int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 3, "%u%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading 2147483647, u
    unsigned int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 55, "%u%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 2147483647 );
    CHECK_EQUAL( n, 10 );
    }
    {
    // reading +2147483647, u
    unsigned int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 54, "%u%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 2147483647 );
    CHECK_EQUAL( n, 11 );
    }
    {
    // reading 4294967295, u
    unsigned int i = 0;
    int n;
    CHECK_EQUAL( sscanf( string + 67, "%u%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 4294967295, unsigned int, "%u" );
    CHECK_EQUAL( n, 10 );
    }
    {
    // reading +4294967295, u
    unsigned int i = 0;
    int n;
    CHECK_EQUAL( sscanf( string + 66, "%u%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 4294967295, unsigned int, "%u" );
    CHECK_EQUAL( n, 11 );
    }
    {
    // reading 0, i
    signed int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 1, "%i%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 1 );
    }
    {
    // reading -0, i
    signed int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%i%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading +0, i
    signed int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 3, "%i%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading -2147483648, i
    signed int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 42, "%i%n", &i, &n ), 1 );
    CHECK_EQUAL( i, -2147483648 );
    CHECK_EQUAL( n, 11 );
    }
    {
    // reading 2147483647, i
    signed int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 55, "%i%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 2147483647 );
    CHECK_EQUAL( n, 10 );
    }
    {
    // reading +2147483647, i
    signed int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 54, "%i%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 2147483647 );
    CHECK_EQUAL( n, 11 );
    }
    {
    // reading 0, d
    signed long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 1, "%ld%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0l );
    CHECK_EQUAL( n, 1 );
    }
    {
    // reading -0, d
    signed long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%ld%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0l );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading +0, d
    signed long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 3, "%ld%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0l );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading -2147483648, d
    signed long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 42, "%ld%n", &i, &n ), 1 );
    CHECK_EQUAL( i, -2147483648l );
    CHECK_EQUAL( n, 11 );
    }
    {
    // reading 2147483647, d
    signed long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 55, "%ld%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 2147483647l );
    CHECK_EQUAL( n, 10 );
    }
    {
    // reading +2147483647, d
    signed long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 54, "%ld%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 2147483647l );
    CHECK_EQUAL( n, 11 );
    }
    {
    // reading 0, u
    unsigned long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 1, "%lu%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0ul );
    CHECK_EQUAL( n, 1 );
    }
    {
    // reading -0, u
    unsigned long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%lu%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0ul );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading +0, u
    unsigned long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 3, "%lu%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0ul );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading 2147483647, u
    unsigned long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 55, "%lu%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 2147483647ul );
    CHECK_EQUAL( n, 10 );
    }
    {
    // reading +2147483647, u
    unsigned long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 54, "%lu%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 2147483647ul );
    CHECK_EQUAL( n, 11 );
    }
    {
    // reading 4294967295, u
    unsigned long i = 0;
    int n;
    CHECK_EQUAL( sscanf( string + 67, "%lu%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 4294967295ul, unsigned long, "%lu" );
    CHECK_EQUAL( n, 10 );
    }
    {
    // reading +4294967295, u
    unsigned long i = 0;
    int n;
    CHECK_EQUAL( sscanf( string + 66, "%lu%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 4294967295ul, unsigned long, "%lu" );
    CHECK_EQUAL( n, 11 );
    }
    {
    // reading 0, i
    signed long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 1, "%li%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0l );
    CHECK_EQUAL( n, 1 );
    }
    {
    // reading -0, i
    signed long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%li%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0l );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading +0, i
    signed long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 3, "%li%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0l );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading -2147483648, i
    signed long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 42, "%li%n", &i, &n ), 1 );
    CHECK_EQUAL( i, -2147483648l );
    CHECK_EQUAL( n, 11 );
    }
    {
    // reading 2147483647, i
    signed long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 55, "%li%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 2147483647l );
    CHECK_EQUAL( n, 10 );
    }
    {
    // reading +2147483647, i
    signed long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 54, "%li%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 2147483647l );
    CHECK_EQUAL( n, 11 );
    }
    {
    // reading 0, d
    signed long long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 1, "%lld%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0ll );
    CHECK_EQUAL( n, 1 );
    }
    {
    // reading -0, d
    signed long long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%lld%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0ll );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading +0, d
    signed long long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 3, "%lld%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0ll );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading -9223372036854775808, d
    signed long long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 78, "%lld%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, LLONG_MIN, signed long long, "%lld" ); // should be literal -9223372036854775808ll but GCC balks.
    CHECK_EQUAL( i < 0ll, 1 );
    CHECK_EQUAL( n, 20 );
    }
    {
    // reading 9223372036854775807, d
    signed long long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 100, "%lld%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 9223372036854775807ll, signed long long, "%lld" );
    CHECK_EQUAL( n, 19 );
    }
    {
    // reading +9223372036854775807, d
    signed long long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 99, "%lld%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 9223372036854775807ll, signed long long, "%lld" );
    CHECK_EQUAL( n, 20 );
    }
    {
    // reading 0, u
    unsigned long long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 1, "%llu%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0ull );
    CHECK_EQUAL( n, 1 );
    }
    {
    // reading -0, u
    unsigned long long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%llu%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0ull );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading +0, u
    unsigned long long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 3, "%llu%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0ull );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading 9223372036854775807, u
    unsigned long long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 100, "%llu%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 9223372036854775807ull, unsigned long long, "%llu" );
    CHECK_EQUAL( n, 19 );
    }
    {
    // reading +9223372036854775807, u
    unsigned long long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 99, "%llu%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 9223372036854775807ull, unsigned long long, "%llu" );
    CHECK_EQUAL( n, 20 );
    }
    {
    // reading 18446744073709551615, u
    unsigned long long i = 0;
    int n;
    CHECK_EQUAL( sscanf( string + 121, "%llu%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 18446744073709551615ull, unsigned long long, "%llu" );
    CHECK_EQUAL( n, 20 );
    }
    {
    // reading +18446744073709551615, u
    unsigned long long i = 0;
    int n;
    CHECK_EQUAL( sscanf( string + 120, "%llu%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 18446744073709551615ull, unsigned long long, "%llu" );
    CHECK_EQUAL( n, 21 );
    }
    {
    // reading 0, i
    signed long long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 1, "%lli%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0ll );
    CHECK_EQUAL( n, 1 );
    }
    {
    // reading -0, i
    signed long long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%lli%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0ll );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading +0, i
    signed long long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 3, "%lli%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0ll );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading -9223372036854775808, i
    signed long long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 78, "%lli%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, LLONG_MIN, signed long long, "%lli" ); // should be literal -9223372036854775808ll but GCC balks.
    CHECK_EQUAL( i < 0ll, 1 );
    CHECK_EQUAL( n, 20 );
    }
    {
    // reading 9223372036854775807, i
    signed long long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 100, "%lli%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 9223372036854775807ll, signed long long, "%lli" );
    CHECK_EQUAL( n, 19 );
    }
    {
    // reading +9223372036854775807, i
    signed long long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 99, "%lli%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 9223372036854775807ll, signed long long, "%lli" );
    CHECK_EQUAL( n, 20 );
    }
}

// hexadecimal integer matches
void suite_three()
{
    char const * string = "-0x0 -0x000 -0x7f 0x80 0xff -0x7fff 0x8000\n"
                          "0xffff -0x7fffffff 0x80000000 0xffffffff\n"
                          "-0x7fffffffffffffff 0x8000000000000000\n"
                          "0xffffffffffffffff -0x\n";
    CHECK_EQUAL( string[145], '\n' );
    {
    // reading 0, x
    unsigned char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 3, "%hhx%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 1 );
    }
    {
    // reading -0x0, x
    unsigned char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%hhx%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 4 );
    }
    {
    // reading -0x, x
    unsigned char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 142, "%hhx%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 3 );
    }
    {
    // reading 0x000, x
    unsigned char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 5, "%hhx%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 6 );
    }
    {
    // reading 0x0, i
    signed char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%hhi%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 4 );
    }
    {
    // reading 7f, x
    unsigned char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 15, "%hhx%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 127 );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading -0x7f, x
    unsigned char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 12, "%hhx%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, -127, unsigned char, "%hhu" );
    CHECK_EQUAL( n, 5 );
    }
    {
    // reading 0x80, i
    signed char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 18, "%hhi%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, -128, signed char, "%hd" );
    CHECK_EQUAL( n, 4 );
    }
    {
    // reading ff, x
    unsigned char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 25, "%hhx%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0xff );
    CHECK_EQUAL( n, 2 );
    }
    {
    // reading 0xff, x
    unsigned char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 23, "%hhx%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 255 );
    CHECK_EQUAL( n, 4 );
    }
    {
    // reading 0xff, i
    signed char i = 0;
    int n;
    CHECK_EQUAL( sscanf( string + 23, "%hhi%n", &i, &n ), 1 );
    CHECK_EQUAL( i, -1 );
    CHECK_EQUAL( n, 4 );
    }
    {
    // reading 0, x
    unsigned short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 3, "%hx%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 1 );
    }
    {
    // reading -0x0, x
    unsigned short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%hx%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 4 );
    }
    {
    // reading -0x, x
    unsigned short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 142, "%hx%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 3 );
    }
    {
    // reading 0x000, x
    unsigned short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 5, "%hx%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 6 );
    }
    {
    // reading 0x0, i
    signed short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%hi%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 4 );
    }
    {
    // reading 7fff, x
    unsigned short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 31, "%hx%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 32767 );
    CHECK_EQUAL( n, 4 );
    }
    {
    // reading -0x7fff, x
    unsigned short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 28, "%hx%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, -32767, unsigned short, "%hu" );
    CHECK_EQUAL( n, 7 );
    }
    {
    // reading 0x8000, i
    signed short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 36, "%hi%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, -32768, signed short, "%hd" );
    CHECK_EQUAL( n, 6 );
    }
    {
    // reading ffff, x
    unsigned short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 45, "%hx%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 65535 );
    CHECK_EQUAL( n, 4 );
    }
    {
    // reading 0xffff, x
    unsigned short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 43, "%hx%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 65535 );
    CHECK_EQUAL( n, 6 );
    }
    {
    // reading 0xffff, i
    signed short i = 0;
    int n;
    CHECK_EQUAL( sscanf( string + 43, "%hi%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, -1, signed short, "%hd" );
    CHECK_EQUAL( n, 6 );
    }
    {
    // reading 0, x
    unsigned int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 3, "%x%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 1 );
    }
    {
    // reading -0x0, x
    unsigned int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%x%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 4 );
    }
    {
    // reading -0x, x
    unsigned int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 142, "%x%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 3 );
    }
    {
    // reading 0x000, x
    unsigned int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 5, "%x%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 6 );
    }
    {
    // reading 0x0, i
    signed int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%i%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0 );
    CHECK_EQUAL( n, 4 );
    }
    {
    // reading 7fffffff, x
    unsigned int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 53, "%x%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 2147483647 );
    CHECK_EQUAL( n, 8 );
    }
    {
    // reading -0x7fffffff, x
    unsigned int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 50, "%x%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, -2147483647, unsigned int, "%u" );
    CHECK_EQUAL( n, 11 );
    }
    {
    // reading 0x80000000, i
    signed int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 62, "%i%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 2147483647, signed int, "%d" ); // NOT overflowing, see strtol() specs.
    CHECK_EQUAL( n, 10 );
    }
    {
    // reading ffffffff, x
    unsigned int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 75, "%x%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 4294967295, unsigned int, "%d" );
    CHECK_EQUAL( n, 8 );
    }
    {
    // reading 0xffffffff, x
    unsigned int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 73, "%x%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 4294967295, unsigned int, "%d" );
    CHECK_EQUAL( n, 10 );
    }
    {
    // reading 0xffffffff, i
    signed int i = 0;
    int n;
    CHECK_EQUAL( sscanf( string + 73, "%i%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 2147483647, signed int, "%d" ); // NOT overflowing; see strtol() specs.
    CHECK_EQUAL( n, 10 );
    }
}

// octal integer matches
void suite_four()
{
    char const * string = "+0000 -0000 +0177 +0377 -0377 +077777 +0177777\n"
                          "-0177777 +017777777777 +037777777777\n"
                          "-037777777777 +0777777777777777777777\n"
                          "+01777777777777777777777\n"
                          "-01777777777777777777777\n";
    CHECK_EQUAL( string[171], '\n' );
    {
    // reading 0, o
    unsigned char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 4, "%hho%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0u );
    CHECK_EQUAL( n, 1 );
    }
    {
    // reading +0000, o
    unsigned char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%hho%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0u );
    CHECK_EQUAL( n, 5 );
    }
    {
    // reading -0000, o
    unsigned char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 6, "%hho%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 0u );
    CHECK_EQUAL( n, 5 );
    }
    {
    // reading 0177, o
    unsigned char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 13, "%hho%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 127u );
    CHECK_EQUAL( n, 4 );
    }
    {
    // reading +0177, o
    unsigned char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 12, "%hho%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 127u );
    CHECK_EQUAL( n, 5 );
    }
    {
    // reading 0377, o
    unsigned char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 19, "%hho%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 255u, unsigned char, "%hhu" );
    CHECK_EQUAL( n, 4 );
    }
    {
    // reading +0377, o
    unsigned char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 18, "%hho%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 255u, unsigned char, "%hhu" );
    CHECK_EQUAL( n, 5 );
    }
    {
    // reading -0377, o
    unsigned char i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 24, "%hho%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 1u, unsigned char, "%hhu" );
    CHECK_EQUAL( n, 5 );
    }
    {
    // reading 077777, o
    unsigned short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 31, "%ho%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 32767u );
    CHECK_EQUAL( n, 6 );
    }
    {
    // reading +077777, o
    unsigned short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 30, "%ho%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 32767u );
    CHECK_EQUAL( n, 7 );
    }
    {
    // reading 0177777, o
    unsigned short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 39, "%ho%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 65535u, unsigned short, "%hu" );
    CHECK_EQUAL( n, 7 );
    }
    {
    // reading +0177777, o
    unsigned short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 38, "%ho%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 65535u, unsigned short, "%hu" );
    CHECK_EQUAL( n, 8 );
    }
    {
    // reading -0177777, o
    unsigned short i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 47, "%ho%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 1u, unsigned short, "%hu" );
    CHECK_EQUAL( n, 8 );
    }
    {
    // reading 017777777777, o
    unsigned int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 57, "%o%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 2147483647u );
    CHECK_EQUAL( n, 12 );
    }
    {
    // reading +017777777777, o
    unsigned int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 56, "%o%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 2147483647u );
    CHECK_EQUAL( n, 13 );
    }
    {
    // reading 037777777777, o
    unsigned int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 71, "%o%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 4294967295u, unsigned int, "%u" );
    CHECK_EQUAL( n, 12 );
    }
    {
    // reading +037777777777, o
    unsigned int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 70, "%o%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 4294967295u, unsigned int, "%u" );
    CHECK_EQUAL( n, 13 );
    }
    {
    // reading -037777777777, o
    unsigned int i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 84, "%o%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 1u, unsigned int, "%u" );
    CHECK_EQUAL( n, 13 );
    }
    {
    // reading 017777777777, o
    unsigned long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 57, "%lo%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 2147483647lu );
    CHECK_EQUAL( n, 12 );
    }
    {
    // reading +017777777777, o
    unsigned long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 56, "%lo%n", &i, &n ), 1 );
    CHECK_EQUAL( i, 2147483647lu );
    CHECK_EQUAL( n, 13 );
    }
    {
    // reading 037777777777, o
    unsigned long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 71, "%lo%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 4294967295lu, unsigned long, "%lu" );
    CHECK_EQUAL( n, 12 );
    }
    {
    // reading +037777777777, o
    unsigned long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 70, "%lo%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 4294967295lu, unsigned long, "%lu" );
    CHECK_EQUAL( n, 13 );
    }
    {
    // reading -037777777777, o
    unsigned long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 84, "%lo%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 1lu, unsigned long, "%lu" );
    CHECK_EQUAL( n, 13 );
    }
    {
    // reading 0777777777777777777777, o
    unsigned long long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 99, "%llo%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 9223372036854775807llu, unsigned long long, "%llu" );
    CHECK_EQUAL( n, 22 );
    }
    {
    // reading +0777777777777777777777, o
    unsigned long long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 98, "%llo%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 9223372036854775807llu, unsigned long long, "%llu" );
    CHECK_EQUAL( n, 23 );
    }
    {
    // reading 01777777777777777777777, o
    unsigned long long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 123, "%llo%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 18446744073709551615llu, unsigned long long, "%llu" );
    CHECK_EQUAL( n, 23 );
    }
    {
    // reading +01777777777777777777777, o
    unsigned long long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 122, "%llo%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 18446744073709551615llu, unsigned long long, "%llu" );
    CHECK_EQUAL( n, 24 );
    }
    {
    // reading -01777777777777777777777, o
    unsigned long long i = -1;
    int n;
    CHECK_EQUAL( sscanf( string + 147, "%llo%n", &i, &n ), 1 );
    CHECK_FEQUAL( i, 1llu, unsigned long long, "%llu" );
    CHECK_EQUAL( n, 24 );
    }
}

// string matches
void suite_five()
{
    char const * string = "abcdefgh-ijklmnop[qrs%uvw]xyz";
    CHECK_EQUAL( string[28], 'z' );
    size_t const BUFSIZE = 29;
    char buffer[ BUFSIZE ];
    {
    // reading abc
    memset( buffer, '\0', BUFSIZE );
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%[abc]%n", buffer, &n ), 1 );
    CHECK_EQUAL( n, 3 );
    CHECK_FALSE( memcmp( buffer, "abc", n + 1 ) );
    }
    {
    // reading a-c
    memset( buffer, '\0', BUFSIZE );
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%[a-c]%n", buffer, &n ), 1 );
    CHECK_EQUAL( n, 3 );
    CHECK_FALSE( memcmp( buffer, "abc", n + 1 ) );
    }
    {
    // reading a-h
    memset( buffer, '\0', BUFSIZE );
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%[a-h]%n", buffer, &n ), 1 );
    CHECK_EQUAL( n, 8 );
    CHECK_FALSE( memcmp( buffer, "abcdefgh", n + 1 ) );
    }
    {
    // reading o-r, including [, seperate char
    memset( buffer, '\0', BUFSIZE );
    int n;
    CHECK_EQUAL( sscanf( string + 15, "%[[o-qr]%n", buffer, &n ), 1 );
    CHECK_EQUAL( n, 5 );
    CHECK_FALSE( memcmp( buffer, "op[qr", n + 1 ) );
    }
    {
    // reading v-y, including ], two groups
    memset( buffer, '\0', BUFSIZE );
    int n;
    CHECK_EQUAL( sscanf( string + 23, "%[]v-wx-y]%n", buffer, &n ), 1 );
    CHECK_EQUAL( n, 5 );
    CHECK_FALSE( memcmp( buffer, "vw]xy", n + 1 ) );
    }
    {
    // missing on first character
    memset( buffer, '\0', BUFSIZE );
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%[b]%n", buffer, &n ), 0 );
    CHECK_FALSE( memcmp( buffer, "", 1 ) );
    }
    {
    // eof while reading, two groups
    memset( buffer, '\0', BUFSIZE );
    int n;
    CHECK_EQUAL( sscanf( string + 27, "%[a-zA-Z]%n", buffer, &n ), 1 );
    CHECK_EQUAL( n, 2 );
    CHECK_FALSE( memcmp( buffer, "yz", n + 1 ) );
    }
    {
    // eof before reading
    memset( buffer, '\0', BUFSIZE );
    int n;
    CHECK_EQUAL( sscanf( string + 29, "%[a-z]%n", buffer, &n ), -1 );
    CHECK_FALSE( memcmp( buffer, "", 1 ) );
    }
    {
    // negation - [^...]
    memset( buffer, '\0', BUFSIZE );
    int n;
    CHECK_EQUAL( sscanf( string + 0, "%[^d-f]%n", buffer, &n ), 1 );
    CHECK_EQUAL( n, 3 );
    CHECK_FALSE( memcmp( buffer, "abc", 4 ) );
    }
}

#endif