1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
/* vsscanf( const char *, const char *, va_list )
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>
#include <ctype.h>
#ifndef REGTEST
int vsscanf( const char * _PDCLIB_restrict s, const char * _PDCLIB_restrict format, va_list arg )
{
/* TODO: This function should interpret format as multibyte characters. */
struct _PDCLIB_status_t status;
status.base = 0;
status.flags = 0;
status.n = 0;
status.i = 0;
status.current = 0;
status.s = (char *) s;
status.width = 0;
status.prec = EOF;
status.stream = NULL;
va_copy( status.arg, arg );
while ( *format != '\0' )
{
const char * rc;
if ( ( *format != '%' ) || ( ( rc = _PDCLIB_scan( format, &status ) ) == format ) )
{
/* No conversion specifier, match verbatim */
if ( isspace( *format ) )
{
/* Whitespace char in format string: Skip all whitespaces */
/* No whitespaces in input do not result in matching error */
while ( isspace( *status.s ) )
{
++status.s;
++status.i;
}
}
else
{
/* Non-whitespace char in format string: Match verbatim */
if ( *status.s != *format )
{
if ( *status.s == '\0' && status.n == 0 )
{
/* Early input error */
return EOF;
}
/* Matching error */
return status.n;
}
else
{
++status.s;
++status.i;
}
}
++format;
}
else
{
/* NULL return code indicates error */
if ( rc == NULL )
{
if ( ( *status.s == '\n' ) && ( status.n == 0 ) )
{
status.n = EOF;
}
break;
}
/* Continue parsing after conversion specifier */
format = rc;
}
}
va_end( status.arg );
return status.n;
}
#endif
#ifdef TEST
#define _PDCLIB_FILEID "stdio/vsscanf.c"
#define _PDCLIB_STRINGIO
#include "_PDCLIB_test.h"
static int testscanf( const char * stream, const char * format, ... )
{
va_list ap;
int result;
va_start( ap, format );
result = vsscanf( stream, format, ap );
va_end( ap );
return result;
}
int main( void )
{
char source[100];
#include "scanf_testcases.h"
return TEST_RESULTS;
}
#endif
|
