114 lines
1.7 KiB
C
114 lines
1.7 KiB
C
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/*++
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Copyright (c) 1991 Microsoft Corporation
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Module Name:
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beep.c
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Abstract:
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User mode beep program. This program simply calls the beep function
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Author:
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Steve Wood (stevewo) 8-23-94
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Revision History:
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--*/
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#include <windows.h>
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#include <stdio.h>
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#include <stdlib.h>
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//
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// Local definitions
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//
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VOID
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DisplayUsage( VOID );
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DWORD
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AsciiToInteger(
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char *Number
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);
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int
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__cdecl main(
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int argc,
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char *argv[]
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)
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{
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char *s;
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DWORD dwFreq = 0;
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DWORD dwDuration = 0;
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while (--argc) {
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s = *++argv;
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if (*s == '/' || *s == '-') {
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DisplayUsage();
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exit( 1 );
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}
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else
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if (dwFreq == 0) {
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dwFreq = AsciiToInteger( s );
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if (dwFreq == 0xFFFFFFFF) {
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DisplayUsage();
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exit( 1 );
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}
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}
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else
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if (dwDuration == 0) {
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dwDuration = AsciiToInteger( s );
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if (dwDuration == 0xFFFFFFFF) {
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DisplayUsage();
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exit( 1 );
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}
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}
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}
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//
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// No bounds checking here. Live with it.
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//
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if (dwFreq == 0) {
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dwFreq = 800;
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}
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if (dwDuration == 0) {
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dwDuration = 200;
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}
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Beep( dwFreq, dwDuration );
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return 0;
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}
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VOID
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DisplayUsage( VOID )
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{
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printf( "Usage: BEEP frequency(in Hertz) duration(in milliseconds)\n" );
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}
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DWORD
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AsciiToInteger(
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char *Number
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)
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{
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int total = 0;
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while ( *Number != '\0' ) {
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if ( *Number >= '0' && *Number <= '9' ) {
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total = total * 10 + *Number - '0';
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Number++;
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} else {
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total = -1;
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break;
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}
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}
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return total;
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}
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