77 lines
1.7 KiB
C
77 lines
1.7 KiB
C
/* fputs( const char *, FILE * )
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This file is part of the Public Domain C Library (PDCLib).
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Permission is granted to use, modify, and / or redistribute at will.
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*/
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#include <stdio.h>
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#ifndef REGTEST
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#include "_PDCLIB_io.h"
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int _PDCLIB_fputs_unlocked( const char * _PDCLIB_restrict s,
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FILE * _PDCLIB_restrict stream )
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{
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if ( _PDCLIB_prepwrite( stream ) == EOF )
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{
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return EOF;
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}
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while ( *s != '\0' )
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{
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/* Unbuffered and line buffered streams get flushed when fputs() does
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write the terminating end-of-line. All streams get flushed if the
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buffer runs full.
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*/
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stream->buffer[ stream->bufidx++ ] = *s;
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if ( ( stream->bufidx == stream->bufsize ) ||
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( ( stream->status & _IOLBF ) && *s == '\n' )
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)
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{
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if ( _PDCLIB_flushbuffer( stream ) == EOF )
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{
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return EOF;
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}
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}
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++s;
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}
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if ( stream->status & _IONBF )
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{
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if ( _PDCLIB_flushbuffer( stream ) == EOF )
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{
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return EOF;
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}
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}
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return 0;
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}
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int fputs( const char * _PDCLIB_restrict s,
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FILE * _PDCLIB_restrict stream )
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{
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_PDCLIB_flockfile( stream );
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int r = _PDCLIB_fputs_unlocked( s, stream );
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_PDCLIB_funlockfile( stream );
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return r;
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}
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#endif
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#ifdef TEST
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#include "_PDCLIB_test.h"
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int main( void )
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{
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char const * const message = "SUCCESS testing fputs()";
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FILE * fh;
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TESTCASE( ( fh = tmpfile() ) != NULL );
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TESTCASE( fputs( message, fh ) >= 0 );
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rewind( fh );
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for ( size_t i = 0; i < 23; ++i )
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{
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TESTCASE( fgetc( fh ) == message[i] );
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}
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TESTCASE( fclose( fh ) == 0 );
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return TEST_RESULTS;
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}
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#endif
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