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86 lines
2.3 KiB
C
86 lines
2.3 KiB
C
/* utilities.c: miscellaneous utility routines
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Copyright (c) 2011 Philip Kendall
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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Author contact information:
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E-mail: Philip Kendall <philip-fuse@shadowmagic.org.uk>
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*/
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#include "config.h"
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif /* #ifdef HAVE_STRING_H */
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#include "internals.h"
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#define TZX_HZ 3500000
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static const libspectrum_dword tstates_per_ms = TZX_HZ / 1000;
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libspectrum_dword
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libspectrum_ms_to_tstates( libspectrum_dword ms )
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{
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return ms * tstates_per_ms;
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}
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libspectrum_dword
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libspectrum_tstates_to_ms( libspectrum_dword tstates )
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{
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return tstates / tstates_per_ms;
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}
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void
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libspectrum_set_pause_ms( libspectrum_tape_block *block,
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libspectrum_dword pause_ms )
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{
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libspectrum_tape_block_set_pause( block, pause_ms );
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libspectrum_tape_block_set_pause_tstates( block,
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libspectrum_ms_to_tstates( pause_ms ) );
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}
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void
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libspectrum_set_pause_tstates( libspectrum_tape_block *block,
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libspectrum_dword pause_tstates )
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{
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libspectrum_tape_block_set_pause_tstates( block, pause_tstates );
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libspectrum_tape_block_set_pause( block,
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libspectrum_tstates_to_ms( pause_tstates ) );
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}
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size_t
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libspectrum_bits_to_bytes( size_t bits )
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{
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return ( bits + LIBSPECTRUM_BITS_IN_BYTE - 1 ) / LIBSPECTRUM_BITS_IN_BYTE;
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}
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char*
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libspectrum_safe_strdup( const char *src )
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{
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size_t length;
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char *dest = NULL;
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if( src ) {
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length = strlen( src ) + 1;
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dest = libspectrum_new( char, length );
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memcpy( dest, src, length );
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}
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return dest;
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}
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