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/*
* Copyright ( C ) 2001 Sistina Software ( UK ) Limited .
*
* This file is released under the LGPL .
*/
# include "lib.h"
# include "lvm-types.h"
# include "lvm-string.h"
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# include <ctype.h>
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/*
* On error , up to glibc 2.0 .6 , snprintf returned - 1 if buffer was too small ;
* From glibc 2.1 it returns number of chars ( excl . trailing null ) that would
* have been written had there been room .
*
* lvm_snprintf reverts to the old behaviour .
*/
int lvm_snprintf ( char * buf , size_t bufsize , const char * format , . . . )
{
int n ;
va_list ap ;
va_start ( ap , format ) ;
n = vsnprintf ( buf , bufsize , format , ap ) ;
va_end ( ap ) ;
if ( n < 0 | | ( n > bufsize - 1 ) )
return - 1 ;
return n ;
}
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int emit_to_buffer ( char * * buffer , size_t * size , const char * fmt , . . . )
{
int n ;
va_list ap ;
va_start ( ap , fmt ) ;
n = vsnprintf ( * buffer , * size , fmt , ap ) ;
va_end ( ap ) ;
if ( n < 0 | | ( n = = * size ) )
return 0 ;
* buffer + = n ;
* size - = n ;
return 1 ;
}
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/*
* consume characters while they match the predicate function .
*/
static char * _consume ( char * buffer , int ( * fn ) ( int ) )
{
while ( * buffer & & fn ( * buffer ) )
buffer + + ;
return buffer ;
}
static int _isword ( int c )
{
return ! isspace ( c ) ;
}
/*
* Split buffer into NULL - separated words in argv .
* Returns number of words .
*/
int split_words ( char * buffer , unsigned max , char * * argv )
{
unsigned arg ;
for ( arg = 0 ; arg < max ; arg + + ) {
buffer = _consume ( buffer , isspace ) ;
if ( ! * buffer )
break ;
argv [ arg ] = buffer ;
buffer = _consume ( buffer , _isword ) ;
if ( * buffer ) {
* buffer = ' \0 ' ;
buffer + + ;
}
}
return arg ;
}