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1442 lines
42 KiB
1442 lines
42 KiB
/*******************************Module*Header*********************************\
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* Module Name: mciparse.c
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*
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* Media Control Architecture Command Parser
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*
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* Created: 3/2/90
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* Author: DLL (DavidLe)
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*
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* History:
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*
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* Copyright (c) 1990 Microsoft Corporation
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*
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\******************************************************************************/
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#include <windows.h>
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#define MMNOMIDI
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#define MMNOWAVE
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#define MMNOSOUND
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#define MMNOTIMER
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#define MMNOJOY
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#define MMNOSEQ
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#include "mmsystem.h"
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#define NOMIDIDEV
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#define NOWAVEDEV
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#define NOTIMERDEV
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#define NOJOYDEV
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#define NOSEQDEV
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#define NOTASKDEV
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#include "mmddk.h"
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#include "mmsysi.h"
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#ifndef STATICFN
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#define STATICFN
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#endif
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#define WCODE UINT _based(_segname("_CODE"))
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extern char far szOpen[]; // in MCI.C
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#ifdef DEBUG_RETAIL
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extern int DebugmciSendCommand;
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#endif
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// Number of command tables registered, including "holes"
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static UINT number_of_command_tables;
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// Command table list
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command_table_type command_tables[MAX_COMMAND_TABLES];
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static SZCODE szTypeTableExtension[] = ".mci";
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static SZCODE szCoreTable[] = "core";
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// Core table is loaded when the first MCI command table is requested
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static BOOL bCoreTableLoaded;
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// One element for each device type. Value is the table type to use
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// or 0 if there is no device type specific table.
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static WCODE table_types[] =
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{
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MCI_DEVTYPE_VCR, // vcr
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MCI_DEVTYPE_VIDEODISC, // videodisc
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MCI_DEVTYPE_OVERLAY, // overlay
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MCI_DEVTYPE_CD_AUDIO, // cdaudio
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MCI_DEVTYPE_DAT, // dat
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MCI_DEVTYPE_SCANNER, // scanner
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MCI_DEVTYPE_ANIMATION, // animation
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MCI_DEVTYPE_DIGITAL_VIDEO, // digitalvideo
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MCI_DEVTYPE_OTHER, // other
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MCI_DEVTYPE_WAVEFORM_AUDIO, // waveaudio
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MCI_DEVTYPE_SEQUENCER // sequencer
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};
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/*!!
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void PASCAL NEAR mciToLower (LPSTR lpstrString)
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{
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while (*lpstrString != '\0')
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{
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if (*lpstrString >= 'A' && *lpstrString <= 'Z')
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*lpstrString += 0x20;
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++lpstrString;
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}
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}
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*/
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/*
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* @doc INTERNAL MCI
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* @func UINT | mciEatCommandEntry | Read a command resource entry and
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* return its length and its value and identifier
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*
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* @parm LPCSTR | lpEntry | The start of the command resource entry
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*
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* @parm LPDWORD | lpValue | The value of the entry, returned to caller
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* May be NULL
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*
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* @parm UINT FAR* | lpID | The identifier of the entry, returned to caller
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* May be NULL
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*
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* @rdesc The total number of bytes in the entry
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*
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*/
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UINT PASCAL NEAR mciEatCommandEntry (
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LPCSTR lpEntry,
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LPDWORD lpValue,
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UINT FAR* lpID)
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{
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LPCSTR lpScan = lpEntry;
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while (*lpScan++ != '\0')
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;
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if (lpValue != NULL)
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*lpValue = *(LPDWORD)lpScan;
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lpScan += sizeof(DWORD);
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if (lpID != NULL)
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*lpID = *(LPWORD)lpScan;
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lpScan += sizeof(UINT);
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return lpScan - lpEntry;
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}
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// Return the size used by this token in the parameter list
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UINT PASCAL NEAR mciGetParamSize (DWORD dwValue, UINT wID)
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{
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switch (wID)
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{
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case MCI_CONSTANT:
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case MCI_INTEGER:
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case MCI_STRING:
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return sizeof(DWORD);
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case MCI_RECT:
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return sizeof(RECT);
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case MCI_RETURN:
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switch ((UINT)dwValue)
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{
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case MCI_INTEGER:
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return sizeof(DWORD);
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case MCI_STRING:
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case MCI_RECT:
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return sizeof(RECT);
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default:
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DOUT ("mciGetParamSize: Unknown return type\r\n");
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return 0;
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}
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break;
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}
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return 0;
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}
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/*
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* @doc INTERNAL MCI
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* @func UINT | mciRegisterCommandTable | This function adds a new
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* table for the MCI parser.
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*
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* @parm HGLOBAL | hResource | Handle to the RCDATA resource
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*
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* @parm UINT FAR* | lpwIndex | Pointer to command table index
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*
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* @parm UINT | wType | Specifies the device type for this command table.
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* Driver tables and the core table are type 0.
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*
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* @parm HINSTANCE | hModule | Module instance registering table.
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*
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* @rdesc Returns the command table index number that was assigned or -1
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* on error.
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*
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*/
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STATICFN UINT PASCAL NEAR
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mciRegisterCommandTable(
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HGLOBAL hResource,
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UINT FAR* lpwIndex,
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UINT wType,
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HINSTANCE hModule
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)
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{
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UINT wID;
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/* First check for free slots */
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for (wID = 0; wID < number_of_command_tables; ++wID)
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if (command_tables[wID].hResource == NULL)
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break;
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/* If no empty slots then allocate another one */
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if (wID >= number_of_command_tables)
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{
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if (number_of_command_tables == MAX_COMMAND_TABLES)
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{
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DOUT ("mciRegisterCommandTable: No more tables\r\n");
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return (UINT)-1;
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}
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else
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wID = number_of_command_tables++;
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}
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/* Fill in the slot */
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command_tables[wID].wType = wType;
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command_tables[wID].hResource = hResource;
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command_tables[wID].lpwIndex = lpwIndex;
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command_tables[wID].hModule = hModule;
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#ifdef DEBUG
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command_tables[wID].wLockCount = 0;
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#endif
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#ifdef DEBUG
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if (DebugmciSendCommand > 2)
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{
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DPRINTF(("mciRegisterCommandTable INFO: assigned slot %u\r\n", wID));
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DPRINTF(("mciRegisterCommandTable INFO: #tables is %u\r\n",
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number_of_command_tables));
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}
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#endif
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return wID;
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}
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/*
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* @doc DDK MCI
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* @api UINT | mciLoadCommandResource | Registers the indicated
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* resource as an MCI command table and builds a command table
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* index. If a file with the resource name and the extension '.mci' is
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* found in the path then the resource is taken from that file.
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*
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* @parm HINSTANCE | hInstance | The instance of the module whose executable
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* file contains the resource. This parameter is ignored if an external file
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* is found.
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*
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* @parm LPCSTR | lpResName | The name of the resource
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*
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* @parm UINT | wType | The table type. Custom device specific tables MUST
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* give a table type of 0.
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*
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* @rdesc Returns the command table index number that was assigned or -1
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* on error.
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*
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*/
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UINT WINAPI mciLoadCommandResource (
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HINSTANCE hInstance,
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LPCSTR lpResName,
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UINT wType)
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{
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UINT FAR* lpwIndex, FAR* lpwScan;
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HINSTANCE hExternal;
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HRSRC hResInfo;
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HGLOBAL hResource;
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LPSTR lpResource, lpScan;
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int nCommands = 0;
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UINT wID;
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UINT wLen;
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// Name + '.' + Extension + '\0'
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char strFile[8 + 1 + 3 + 1];
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LPSTR lpstrFile = strFile;
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LPCSTR lpstrType = lpResName;
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OFSTRUCT ofs;
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#ifdef DEBUG
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if (DebugmciSendCommand > 2)
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DPRINTF(("mciLoadCommandResource INFO: %s loading\r\n", (LPSTR)lpResName));
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#endif
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// Initialize the device list
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if (!MCI_bDeviceListInitialized && !mciInitDeviceList())
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return MCIERR_OUT_OF_MEMORY;
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// Load the core table if its not already there
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if (!bCoreTableLoaded)
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{
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bCoreTableLoaded = TRUE;
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// If its not the core table being loaded
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if (lstrcmpi (szCoreTable, lpResName) != 0)
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if (mciLoadCommandResource (ghInst, szCoreTable, 0) == -1)
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{
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DOUT ("mciLoadCommandResource: Cannot load core table\r\n");
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}
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}
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// Check for a file with the extension ".mci"
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// Copy up to the first eight characters of device type
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while (lpstrType < lpResName + 8 && *lpstrType != '\0')
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*lpstrFile++ = *lpstrType++;
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// Tack extension onto end
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lstrcpy (lpstrFile, szTypeTableExtension);
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// If the file exists and can be loaded then set flag
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// otherwise load resource from MMSYSTEM.DLL
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if (OpenFile (strFile, &ofs, OF_EXIST) == HFILE_ERROR ||
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(hExternal = LoadLibrary(strFile)) < HINSTANCE_ERROR)
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hExternal = NULL;
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// Load the given table from the file or from the module if not found
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if (hExternal != NULL &&
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(hResInfo = FindResource (hExternal, lpResName, RT_RCDATA)) != NULL)
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hInstance = hExternal;
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else
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hResInfo = FindResource (hInstance, lpResName, RT_RCDATA);
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if (hResInfo == NULL)
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{
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DOUT ("mciLoadCommandResource: Cannot find command resource\r\n");
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return (UINT)-1;
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}
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if ((hResource = LoadResource (hInstance, hResInfo)) == NULL)
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{
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DOUT ("mciLoadCommandResource: Cannot load command resource\r\n");
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return (UINT)-1;
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}
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if ((lpResource = LockResource (hResource)) == NULL)
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{
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DOUT ("mciLoadCommandResource: Cannot lock resource\r\n");
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FreeResource (hResource);
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return (UINT)-1;
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}
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/* Count the number of commands */
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lpScan = lpResource;
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while (TRUE)
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{
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lpScan += mciEatCommandEntry(lpScan, NULL, &wID);
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// End of command?
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if (wID == MCI_COMMAND_HEAD)
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++nCommands;
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// End of command list?
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else if (wID == MCI_END_COMMAND_LIST)
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break;
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}
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// There must be at least on command in the table
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if (nCommands == 0)
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{
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DOUT ("mciLoadCommandResource: No commands in the specified table\r\n");
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UnlockResource (hResource);
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FreeResource (hResource);
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return (UINT)-1;
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}
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// Allocate storage for the command table index
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// Leave room for a -1 entry to terminate it
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if ((lpwIndex = (UINT FAR*)
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mciAlloc ((UINT)sizeof (UINT) * (nCommands + 1)))
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== NULL)
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{
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DOUT ("mciLoadCommandResource: cannot allocate command table index\r\n");
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UnlockResource (hResource);
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FreeResource (hResource);
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return (UINT)-1;
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}
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/* Build Command Table */
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lpwScan = lpwIndex;
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lpScan = lpResource;
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while (TRUE)
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{
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// Get next command entry
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wLen = mciEatCommandEntry (lpScan, NULL, &wID);
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if (wID == MCI_COMMAND_HEAD)
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// Add an index to this command
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*lpwScan++ = lpScan - lpResource;
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else if (wID == MCI_END_COMMAND_LIST)
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{
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// Mark the end of the table
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*lpwScan = (UINT)-1;
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break;
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}
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lpScan += wLen;
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}
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UnlockResource (hResource);
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return mciRegisterCommandTable (hResource, lpwIndex, wType, hExternal);
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}
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/*
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* @doc INTERNAL MCI
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* @func UINT | mciLoadTableType | If the table of the given type
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* has not been loaded, register it
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*
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* @parm UINT | wType | The table type to load
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*
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* @rdesc Returns the command table index number that was assigned or -1
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* on error.
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*/
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UINT PASCAL NEAR mciLoadTableType (
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UINT wType)
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{
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UINT wID;
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char buf[MCI_MAX_DEVICE_TYPE_LENGTH];
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int nTypeLen;
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// Check to see if this table type is already loaded
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for (wID = 0; wID < number_of_command_tables; ++wID)
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if (command_tables[wID].wType == wType)
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return wID;
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// Must load table
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// First look up what device type specific table to load for this type
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if (wType < MCI_DEVTYPE_FIRST || wType > MCI_DEVTYPE_LAST)
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return (UINT)-1;
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// Load string that corresponds to table type
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LoadString (ghInst, table_types[wType - MCI_DEVTYPE_FIRST],
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buf, sizeof(buf));
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//Must be at least one character in type name
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if ((nTypeLen = lstrlen (buf)) < 1)
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return (UINT)-1;
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// Register the table with MCI
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return mciLoadCommandResource (ghInst, buf, wType);
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}
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/*
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* @doc DDK MCI
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*
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* @api BOOL | mciFreeCommandResource | Frees the memory used
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* by the specified command table.
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*
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* @parm UINT | wTable | The table index returned from a previous call to
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* mciLoadCommandResource.
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*
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* @rdesc FALSE if the table index is not valid, TRUE otherwise.
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*
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*/
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BOOL WINAPI mciFreeCommandResource (
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UINT wTable)
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{
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UINT wID;
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HGLOBAL hResource;
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UINT FAR* lpwIndex;
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#ifdef DEBUG
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if (DebugmciSendCommand > 2)
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{
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DPRINTF(("mciFreeCommandResource INFO: Free table %d\r\n", wTable));
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DPRINTF(("mciFreeCommandResource INFO: Lockcount is %d\r\n",
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command_tables[wTable].wLockCount));
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}
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#endif
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/* Validate input -- do not let the core table be free'd */
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if (wTable <= 0 || wTable >= number_of_command_tables)
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{
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#ifdef DEBUG
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// wTable == -1 is OK
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if (wTable != -1)
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DOUT ("mciFreeCommandResource: Bad table number\r\n");
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#endif
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return FALSE;
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}
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// If this table is being used elsewhere then keep it around
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for (wID = 1; wID < MCI_wNextDeviceID; ++wID)
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if (MCI_lpDeviceList[wID] != NULL)
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if (MCI_lpDeviceList[wID]->wCustomCommandTable == wTable ||
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MCI_lpDeviceList[wID]->wCommandTable == wTable)
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{
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#ifdef DEBUG
|
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if (DebugmciSendCommand > 2)
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DOUT ("mciFreeCommandResource INFO: table in use\r\n");
|
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#endif
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return FALSE;
|
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}
|
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|
|
#if 0
|
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/* Search the list of tables */
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for (wID = 0; wID < number_of_command_tables; ++wID)
|
|
|
|
/* If this resource is still in use, keep it around */
|
|
if (command_tables[wID].hResource == hResource)
|
|
{
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|
#ifdef DEBUG
|
|
if (DebugmciSendCommand > 2)
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DOUT ("mciFreeCommandResource INFO: resource in use\r\n");
|
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#endif
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return FALSE;
|
|
}
|
|
#endif
|
|
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hResource = command_tables[wTable].hResource;
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command_tables[wTable].hResource = NULL;
|
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lpwIndex = command_tables[wTable].lpwIndex;
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command_tables[wTable].lpwIndex = NULL;
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command_tables[wTable].wType = 0;
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|
|
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FreeResource (hResource);
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mciFree (lpwIndex);
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|
|
if (command_tables[wTable].hModule != NULL)
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FreeLibrary (command_tables[wTable].hModule);
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|
// Make space at top of list
|
|
if (wTable == number_of_command_tables - 1)
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--number_of_command_tables;
|
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|
|
#ifdef DEBUG
|
|
if (DebugmciSendCommand > 2)
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DPRINTF(("mciFreeCommandResource INFO: number_of_command_tables: %u\r\n",
|
|
number_of_command_tables));
|
|
#endif
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
void PASCAL NEAR mciCheckLocks (void)
|
|
{
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|
UINT wTable;
|
|
|
|
if (DebugmciSendCommand <= 2)
|
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return;
|
|
|
|
for (wTable = 0; wTable < number_of_command_tables; ++wTable)
|
|
{
|
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if (command_tables[wTable].hResource == NULL)
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continue;
|
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DPRINTF(("mciCheckLocks INFO: table %u ", wTable));
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|
DPRINTF(("user: %x ",
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GlobalFlags (command_tables[wTable].hResource) & GMEM_LOCKCOUNT));
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DPRINTF(("mci: %u ", command_tables[wTable].wLockCount));
|
|
if (GlobalFlags (command_tables[wTable].hResource) & GMEM_DISCARDABLE)
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DPRINTF(("discardable\r\n"));
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|
else
|
|
DPRINTF(("NOT discardable\r\n"));
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* @doc INTERNAL MCI
|
|
* @func BOOL | mciUnlockCommandTable | Unlocks the command table given by
|
|
* a table index
|
|
*
|
|
* @parm UINT | wCommandTable | Table to unlock
|
|
*
|
|
* @rdesc TRUE if success, FALSE otherwise
|
|
*
|
|
* @comm Used external to this module by mci.c
|
|
*
|
|
*/
|
|
BOOL PASCAL NEAR mciUnlockCommandTable (
|
|
UINT wCommandTable)
|
|
{
|
|
UnlockResource(command_tables[wCommandTable].hResource);
|
|
#ifdef DEBUG
|
|
--command_tables[wCommandTable].wLockCount;
|
|
if (DebugmciSendCommand > 2)
|
|
{
|
|
DPRINTF(("mciUnlockCommandTable INFO: table %d\r\n", wCommandTable));
|
|
DOUT ("mciUnlockCommandTable INFO: check locks...\r\n");
|
|
mciCheckLocks();
|
|
}
|
|
#endif
|
|
return TRUE;
|
|
}
|
|
|
|
/*
|
|
* @doc INTERNAL MCI
|
|
* @func LPSTR | FindCommandInTable | Look up the given
|
|
* command string in the GIVEN parser command table
|
|
*
|
|
* @parm UINT | wTable | Command table to use
|
|
*
|
|
* @parm LPCSTR | lpstrCommand | The command to look up. It must
|
|
* be in lower case with no leading or trailing blanks and with at
|
|
* least one character.
|
|
*
|
|
* @parm UINT FAR * | lpwMessage | The message corresponding to the command
|
|
* Returned to caller.
|
|
*
|
|
* @rdesc NULL if the command is unknown or on error, otherwise a pointer to
|
|
* the command list for the input command string.
|
|
*
|
|
* @comm If the command is found, the command resource will be locked on exit.
|
|
*
|
|
*/
|
|
LPSTR PASCAL NEAR FindCommandInTable (
|
|
UINT wTable,
|
|
LPCSTR lpstrCommand,
|
|
UINT FAR * lpwMessage)
|
|
{
|
|
UINT FAR* lpwIndex;
|
|
LPSTR lpResource, lpstrThisCommand;
|
|
UINT wMessage;
|
|
|
|
/* Validate table */
|
|
|
|
if (wTable >= number_of_command_tables)
|
|
{
|
|
// Check the core table but its not yet loaded
|
|
if (wTable == 0)
|
|
{
|
|
// Try to load it
|
|
if (mciLoadCommandResource (ghInst, szCoreTable, 0) == -1)
|
|
{
|
|
DOUT ("FindCommandInTable: cannot load core table\r\n");
|
|
return NULL;
|
|
}
|
|
} else
|
|
{
|
|
DOUT ("MCI FindCommandInTable: invalid table ID\r\n");
|
|
return NULL;
|
|
}
|
|
|
|
}
|
|
|
|
if ((lpResource = LockResource (command_tables[wTable].hResource)) == NULL)
|
|
{
|
|
DOUT ("MCI FindCommandInTable: Cannot lock table resource\r\n");
|
|
return NULL;
|
|
}
|
|
#ifdef DEBUG
|
|
++command_tables[wTable].wLockCount;
|
|
#endif
|
|
|
|
// Look at each command in the table
|
|
lpwIndex = command_tables[wTable].lpwIndex;
|
|
if (lpwIndex == NULL)
|
|
{
|
|
DOUT ("MCI FindCommandInTable: null command table index\r\n");
|
|
return NULL;
|
|
}
|
|
|
|
while (*lpwIndex != -1)
|
|
{
|
|
DWORD dwMessage;
|
|
|
|
lpstrThisCommand = *lpwIndex++ + lpResource;
|
|
|
|
// Get message number from the table
|
|
mciEatCommandEntry (lpstrThisCommand, &dwMessage, NULL);
|
|
wMessage = (UINT)dwMessage;
|
|
|
|
// Does this command match the input?
|
|
|
|
// String case
|
|
if (HIWORD (lpstrCommand) != 0 &&
|
|
lstrcmpi (lpstrThisCommand, lpstrCommand) == 0 ||
|
|
|
|
// Message case
|
|
HIWORD (lpstrCommand) == 0 &&
|
|
wMessage == LOWORD ((DWORD)lpstrCommand))
|
|
{
|
|
// Retain the locked resource pointer
|
|
command_tables[wTable].lpResource = lpResource;
|
|
|
|
// Address the message ID which comes after the command name
|
|
if (lpwMessage != NULL)
|
|
*lpwMessage = wMessage;
|
|
// Leave table locked on exit
|
|
return lpstrThisCommand;
|
|
}
|
|
|
|
// Strings don't match, go to the next command in the table
|
|
}
|
|
|
|
UnlockResource (command_tables[wTable].hResource);
|
|
#ifdef DEBUG
|
|
--command_tables[wTable].wLockCount;
|
|
#endif
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* @doc INTERNAL MCI
|
|
* @func LPSTR | FindCommandItem | Look up the given
|
|
* command string in the parser command tables
|
|
*
|
|
* @parm UINT | wDeviceID | The device ID used for this command.
|
|
* If 0 then only the system core command table is searched.
|
|
*
|
|
* @parm LPCSTR | lpstrType | The type name of the device
|
|
*
|
|
* @parm LPCSTR | lpstrCommand | The command to look up. It must
|
|
* be in lower case with no leading or trailing blanks and with at
|
|
* least one character. If the HIWORD is 0 then the LOWORD contains
|
|
* the command message ID instead of a command name and the function is
|
|
* merely to find the command list pointer.
|
|
*
|
|
* If the high word is 0 then the low word is an command ID value instead
|
|
* of a command name
|
|
*
|
|
* @parm UINT FAR* | lpwMessage | The message corresponding to the command
|
|
* Returned to caller.
|
|
*
|
|
* @parm UINT FAR* | lpwTable | The table index in which the command was found
|
|
* Returned to caller.
|
|
*
|
|
* @rdesc NULL if the command is unknown, otherwise a pointer to
|
|
* the command list for the input command string.
|
|
*/
|
|
LPSTR PASCAL NEAR FindCommandItem (
|
|
UINT wDeviceID,
|
|
LPCSTR lpstrType,
|
|
LPCSTR lpstrCommand,
|
|
UINT FAR* lpwMessage,
|
|
UINT FAR* lpwTable)
|
|
{
|
|
LPSTR lpCommand;
|
|
UINT wTable;
|
|
LPMCI_DEVICE_NODE nodeWorking;
|
|
|
|
// Only check hiword per comments above
|
|
if (HIWORD (lpstrCommand) != NULL && *lpstrCommand == '\0')
|
|
{
|
|
DOUT ("MCI FindCommandItem: lpstrCommand is NULL or empty string\r\n");
|
|
return NULL;
|
|
}
|
|
|
|
// If a specific device ID was specified then look in any custom table
|
|
// or type table
|
|
if (wDeviceID != 0 && wDeviceID != MCI_ALL_DEVICE_ID)
|
|
{
|
|
// If the device ID is valid
|
|
if (!MCI_VALID_DEVICE_ID(wDeviceID))
|
|
{
|
|
DOUT ("MCI FindCommandItem: Invalid device ID\r\n");
|
|
return NULL;
|
|
}
|
|
nodeWorking = MCI_lpDeviceList[wDeviceID];
|
|
|
|
// If there is a custom command table then use it
|
|
if ((wTable = nodeWorking->wCustomCommandTable) != -1)
|
|
{
|
|
lpCommand = FindCommandInTable (wTable, lpstrCommand, lpwMessage);
|
|
if (lpCommand != NULL)
|
|
goto exit;
|
|
}
|
|
// Get the device type table from the existing device
|
|
// Relies on mciReparseCommand in mciLoadDevice to catch all device type
|
|
// tables when device is not yet open.
|
|
if ((wTable = nodeWorking->wCommandTable) != -1)
|
|
{
|
|
lpCommand = FindCommandInTable (wTable, lpstrCommand, lpwMessage);
|
|
if (lpCommand != NULL)
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
// If no match was found in the device or type specific tables
|
|
// Look in the core table
|
|
wTable = 0;
|
|
lpCommand = FindCommandInTable (wTable, lpstrCommand, lpwMessage);
|
|
if (lpCommand == NULL)
|
|
wTable = (UINT)-1;
|
|
|
|
exit:
|
|
if (lpwTable != NULL)
|
|
*lpwTable = wTable;
|
|
|
|
#ifdef DEBUG
|
|
if (DebugmciSendCommand > 2)
|
|
{
|
|
DOUT ("FindCommandItem INFO: check locks...\r\n");
|
|
mciCheckLocks();
|
|
}
|
|
#endif
|
|
|
|
return lpCommand;
|
|
}
|
|
|
|
/*
|
|
* @doc INTERNAL MCI
|
|
* @func LPSTR | mciCheckToken | Check to see if the command item matches
|
|
* the given string, allowing multiple blanks in the input parameter to
|
|
* match a corresponding single blank in the command token and ignoring
|
|
* case.
|
|
*
|
|
* @parm LPCSTR | lpstrToken | The command token to check
|
|
*
|
|
* @parm LPCSTR | lpstrParam | The input parameter
|
|
*
|
|
* @rdesc NULL if no match, otherwise points to the first character
|
|
* after the parameter
|
|
*
|
|
*/
|
|
STATICFN LPSTR PASCAL NEAR
|
|
mciCheckToken(
|
|
LPCSTR lpstrToken,
|
|
LPCSTR lpstrParam
|
|
)
|
|
{
|
|
/* Check for legal input */
|
|
if (lpstrToken == NULL || lpstrParam == NULL)
|
|
return NULL;
|
|
|
|
while (*lpstrToken != '\0' && MCI_TOLOWER(*lpstrParam) == *lpstrToken)
|
|
{
|
|
// If the token contains a blank, allow more than one blank in the
|
|
// parameter
|
|
if (*lpstrToken == ' ')
|
|
while (*lpstrParam == ' ')
|
|
++lpstrParam;
|
|
else
|
|
*lpstrParam++;
|
|
*lpstrToken++;
|
|
}
|
|
if (*lpstrToken != '\0'|| (*lpstrParam != '\0' && *lpstrParam != ' '))
|
|
return NULL;
|
|
else
|
|
return (LPSTR)lpstrParam;
|
|
}
|
|
|
|
/*
|
|
* @doc INTERNAL MCI
|
|
* @api BOOL | mciParseInteger | Parse the given integer
|
|
*
|
|
* @parm LPSTR FAR * | lplpstrInput | The string containing the argument.
|
|
* It is updated and returned to the caller pointing to the first character
|
|
* after the argument or to the first character that is in error.
|
|
*
|
|
* @parm LPDWORD | lpdwArgument | The place to put the output
|
|
*
|
|
* @rdesc Returns TRUE if not error
|
|
*
|
|
* @comm If there are colons in the input (':') the result is "colonized".
|
|
* This means that each time a colon is read, the current result is written
|
|
* and any subsequent digits are shifted left one byte. No one "segment"
|
|
* can be more than 0xFF. For example, "0:1:2:3" is parsed to 0x03020100.
|
|
*
|
|
*/
|
|
|
|
#pragma warning(4:4146)
|
|
|
|
STATICFN BOOL PASCAL NEAR
|
|
mciParseInteger(
|
|
LPSTR FAR * lplpstrInput,
|
|
LPDWORD lpdwArgument
|
|
)
|
|
{
|
|
LPSTR lpstrInput = *lplpstrInput;
|
|
BOOL fDigitFound;
|
|
DWORD dwResult;
|
|
LPSTR lpstrResult = (LPSTR)lpdwArgument;
|
|
int nDigitPosition = 0;
|
|
BOOL bSigned = FALSE;
|
|
|
|
// Leading blanks have been removed by mciParseParams
|
|
|
|
if (*lpstrInput == '-')
|
|
{
|
|
++lpstrInput;
|
|
bSigned = TRUE;
|
|
}
|
|
|
|
// Read digits
|
|
*lpdwArgument = 0; /* Initialize */
|
|
dwResult = 0;
|
|
fDigitFound = FALSE; /* Initialize */
|
|
while (*lpstrInput >= '0' && *lpstrInput <= '9' || *lpstrInput == ':')
|
|
{
|
|
// ':' indicates colonized data
|
|
if (*lpstrInput == ':')
|
|
{
|
|
// Cannot mix colonized and signed forms
|
|
if (bSigned)
|
|
{
|
|
DOUT ("Bad integer: mixing signed and colonized forms\r\n");
|
|
return FALSE;
|
|
}
|
|
// Check for overflow in accumulated colonized byte
|
|
if (dwResult > 0xFF)
|
|
return FALSE;
|
|
|
|
// Copy and move to next byte converted in output
|
|
*lpstrResult++ = (char)dwResult;
|
|
++lpstrInput;
|
|
// Initialize next colonized byte
|
|
dwResult = 0;
|
|
++nDigitPosition;
|
|
// Only allow four colonized components
|
|
if (nDigitPosition > 3)
|
|
{
|
|
DOUT ("Bad integer: Too many colonized components\r\n");
|
|
return FALSE;
|
|
}
|
|
} else
|
|
{
|
|
char cDigit = (char)(*lpstrInput++ - '0');
|
|
// Satisfies condition that at least one digit must be read
|
|
fDigitFound = TRUE;
|
|
|
|
if (dwResult > 0xFFFFFFFF / 10)
|
|
// Overflow if multiply was to occur
|
|
return FALSE;
|
|
else
|
|
// Multiply for next digit
|
|
dwResult *= 10;
|
|
|
|
// Add new digit
|
|
dwResult += cDigit;
|
|
}
|
|
}
|
|
if (nDigitPosition == 0)
|
|
{
|
|
// No colonized components
|
|
if (bSigned)
|
|
{
|
|
// Check for overflow from negation
|
|
if (dwResult > 0x7FFFFFFF)
|
|
return FALSE;
|
|
// Negate result because a '-' sign was parsed
|
|
dwResult = -dwResult;
|
|
}
|
|
|
|
*lpdwArgument = dwResult;
|
|
}
|
|
else
|
|
// Store last colonized component
|
|
{
|
|
// Check for overflow
|
|
if (dwResult > 0xFF)
|
|
return FALSE;
|
|
// Store component
|
|
*lpstrResult = (char)dwResult;
|
|
}
|
|
|
|
*lplpstrInput = lpstrInput;
|
|
|
|
/*
|
|
If there were no digits or if the digits were followed by a character
|
|
other than a blank or a '\0', then return a syntax error.
|
|
*/
|
|
return fDigitFound && (!*lpstrInput || *lpstrInput == ' ');
|
|
}
|
|
|
|
/*
|
|
* @doc INTERNAL MCI
|
|
* @func BOOL | mciParseConstant | Parse the given integer
|
|
*
|
|
* @parm LPSTR FAR * | lplpstrInput | The string containing the argument.
|
|
* It is updated and returned to the caller pointing to the first character
|
|
* after the argument or to the first character that is in error.
|
|
*
|
|
* @parm LPDWORD | lpdwArgument | The place to put the output
|
|
*
|
|
* @parm LPSTR | lpItem | Pointer into command table.
|
|
*
|
|
* @rdesc Returns TRUE if not error
|
|
*
|
|
*/
|
|
STATICFN BOOL PASCAL NEAR
|
|
mciParseConstant(
|
|
LPSTR FAR * lplpstrInput,
|
|
LPDWORD lpdwArgument,
|
|
LPSTR lpItem
|
|
)
|
|
{
|
|
LPSTR lpPrev;
|
|
DWORD dwValue;
|
|
UINT wID;
|
|
|
|
// Skip past constant header
|
|
lpItem += mciEatCommandEntry (lpItem, &dwValue, &wID);
|
|
|
|
while (TRUE)
|
|
{
|
|
LPSTR lpstrAfter;
|
|
|
|
lpPrev = lpItem;
|
|
|
|
lpItem += mciEatCommandEntry (lpItem, &dwValue, &wID);
|
|
|
|
if (wID == MCI_END_CONSTANT)
|
|
break;
|
|
|
|
if ((lpstrAfter = mciCheckToken (lpPrev, *lplpstrInput)) != NULL)
|
|
{
|
|
*lpdwArgument = dwValue;
|
|
*lplpstrInput = lpstrAfter;
|
|
return TRUE;
|
|
}
|
|
|
|
}
|
|
|
|
return mciParseInteger (lplpstrInput, lpdwArgument);
|
|
}
|
|
|
|
/*
|
|
* @doc INTERNAL MCI
|
|
* @func UINT | mciParseArgument | Parse the given argument
|
|
*
|
|
* @parm DWORD | dwValue | The argument value
|
|
*
|
|
* @parm UINT | wID | The argument ID
|
|
*
|
|
* @parm LPSTR FAR * | lplpstrOutput | The string containing the argument.
|
|
* It is updated and returned to the caller pointing to the first character
|
|
* after the argument or to the first character that is in error.
|
|
*
|
|
* @parm LPDWORD | lpdwFlags | The output flags
|
|
*
|
|
* @parm LPDWORD | lpArgument | The place to put the output
|
|
*
|
|
* @rdesc Returns 0 if no error or
|
|
* @flag MCIERR_BAD_INTEGER | An integer argument could not be parsed
|
|
* @flag MCIERR_MISSING_STRING_ARGUMENT | An expected string argument
|
|
* @flag MCIERR_PARM_OVERFLOW | The output buffer was a NULL pointer
|
|
* was missing
|
|
*
|
|
*/
|
|
STATICFN UINT PASCAL NEAR
|
|
mciParseArgument(
|
|
DWORD dwValue,
|
|
UINT wID,
|
|
LPSTR FAR * lplpstrOutput,
|
|
LPDWORD lpdwFlags,
|
|
LPSTR lpArgument,
|
|
LPSTR lpCurrentCommandItem
|
|
)
|
|
{
|
|
LPSTR lpstrInput = *lplpstrOutput;
|
|
UINT wRetval = 0;
|
|
|
|
/* Switch on the argument type */
|
|
switch (wID)
|
|
{
|
|
|
|
// The parameter is a flag
|
|
case MCI_FLAG:
|
|
break; /* switch */
|
|
|
|
case MCI_CONSTANT:
|
|
if (*lpstrInput == '\0')
|
|
wRetval = MCIERR_NO_INTEGER;
|
|
else if (!mciParseConstant (&lpstrInput, (LPDWORD)lpArgument,
|
|
lpCurrentCommandItem))
|
|
wRetval = MCIERR_BAD_CONSTANT;
|
|
break;
|
|
|
|
/* The parameter has an integer argument, try to parse it */
|
|
case MCI_INTEGER:
|
|
if (!mciParseInteger (&lpstrInput, (LPDWORD)lpArgument))
|
|
wRetval = MCIERR_BAD_INTEGER;
|
|
|
|
break; /* switch */
|
|
case MCI_RECT:
|
|
{
|
|
// Read in four RECT components. Resulting structure is the
|
|
// same as a Windows RECT
|
|
long lTemp;
|
|
int n;
|
|
for (n = 0; n < 4; ++n)
|
|
{
|
|
if (!mciParseInteger (&lpstrInput, &lTemp))
|
|
{
|
|
wRetval = MCIERR_BAD_INTEGER;
|
|
break;
|
|
}
|
|
// Each component is a signed 16 bit number
|
|
if (lTemp > 32768 || lTemp < -32767)
|
|
{
|
|
wRetval = MCIERR_BAD_INTEGER;
|
|
break;
|
|
}
|
|
((int FAR *)lpArgument)[n] = (int)lTemp;
|
|
// Remove leading blanks before next digit
|
|
while (*lpstrInput == ' ') ++lpstrInput;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case MCI_STRING:
|
|
{
|
|
LPSTR lpstrOutput;
|
|
|
|
/* The parameter has an string argument, read it */
|
|
|
|
// Leading blanks have been removed by mciParseParams
|
|
|
|
/* Are there any non-blank characters left in the input? */
|
|
if (*lpstrInput == '\0')
|
|
{
|
|
/* Return an error */
|
|
wRetval = MCIERR_MISSING_STRING_ARGUMENT;
|
|
break; /* switch */
|
|
}
|
|
|
|
if ((wRetval = mciEatToken (&lpstrInput, ' ', &lpstrOutput, FALSE))
|
|
!= 0)
|
|
{
|
|
DOUT ("mciParseArgument: error parsing string\r\n");
|
|
return wRetval;
|
|
}
|
|
|
|
*(LPDWORD)lpArgument = (DWORD)lpstrOutput;
|
|
|
|
// NOTE: mciSendString frees the output string after command execution
|
|
// by calling mciParserFree
|
|
|
|
break; /* switch */
|
|
} /* case */
|
|
} /* switch */
|
|
|
|
/* Update the output flags if there was no error */
|
|
if (wRetval == 0)
|
|
{
|
|
if (*lpdwFlags & dwValue)
|
|
{
|
|
if (wID == MCI_CONSTANT)
|
|
wRetval = MCIERR_FLAGS_NOT_COMPATIBLE;
|
|
else
|
|
wRetval = MCIERR_DUPLICATE_FLAGS;
|
|
} else
|
|
*lpdwFlags |= dwValue;
|
|
}
|
|
/*
|
|
Return the input pointer pointing at the first character after
|
|
the argument or to the first character that is in error
|
|
*/
|
|
*lplpstrOutput = lpstrInput;
|
|
return wRetval;
|
|
}
|
|
|
|
/*
|
|
* @doc MCI INTERNAL
|
|
* @func UINT | mciParseParams | Parse the command parameters
|
|
*
|
|
* @parm LPCSTR | lpstrParams | The parameter string
|
|
*
|
|
* @parm LPCSTR | lpCommandList | The command table description
|
|
* of the command tokens
|
|
*
|
|
* @parm LPDWORD | lpdwFlags | Return the parsed flags here
|
|
*
|
|
* @parm LPDWORD | lpdwOutputParams | Return the list of parameters here
|
|
*
|
|
* @parm UINT | wParamsSize | The size allocated for the parameter list
|
|
*
|
|
* @parm LPSTR FAR * FAR * | lpPointerList | A NULL terminated list of
|
|
* pointers allocated by this function that should be free'd when
|
|
* no longer needed. The list itself should be free'd also. In both
|
|
* cases, use mciFree().
|
|
*
|
|
* @parm UINT FAR* | lpwParsingError | If not NULL then if the command is
|
|
* 'open', unrecognized keywords return an error here, and the
|
|
* function return value is 0 (unless other errors occur). This
|
|
* is used to allow reparsing of the command by mciLoadDevice
|
|
*
|
|
* @rdesc Returns zero if successful or one of the following error codes:
|
|
* @flag MCIERR_PARM_OVERFLOW | Not enough space for parameters
|
|
* @flag MCIERR_UNRECOGNIZED_KEYWORD | Unrecognized keyword
|
|
*
|
|
* @comm Any syntax error, including missing arguments, will result in
|
|
* a non-zero error return and invalid output data.
|
|
*
|
|
*/
|
|
UINT PASCAL NEAR
|
|
mciParseParams(
|
|
LPCSTR lpstrParams,
|
|
LPCSTR lpCommandList,
|
|
LPDWORD lpdwFlags,
|
|
LPSTR lpOutputParams,
|
|
UINT wParamsSize,
|
|
LPSTR FAR * FAR *lpPointerList,
|
|
UINT FAR* lpwOpenError
|
|
)
|
|
{
|
|
LPSTR lpFirstCommandItem, lpCurrentCommandItem;
|
|
UINT wArgumentPosition, wErr, wLen, wID, wDefaultID;
|
|
DWORD dwValue, dwDefaultValue;
|
|
BOOL bOpenCommand;
|
|
LPSTR FAR *lpstrPointerList;
|
|
UINT wPointers = 0;
|
|
UINT wHeaderSize = 0;
|
|
LPSTR lpDefaultCommandItem = NULL;
|
|
UINT wDefaultArgumentPosition;
|
|
|
|
if (lpwOpenError != NULL)
|
|
*lpwOpenError = 0;
|
|
|
|
// If the parameter pointer is NULL, return
|
|
if (lpstrParams == NULL)
|
|
{
|
|
DOUT ("Warning: lpstrParams is null in mciParseParams()\r\n");
|
|
return 0;
|
|
}
|
|
|
|
if ((lpstrPointerList =
|
|
mciAlloc ((MCI_MAX_PARAM_SLOTS + 1) * sizeof (LPSTR)))
|
|
== NULL)
|
|
{
|
|
*lpPointerList = NULL;
|
|
return MCIERR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
// If this is the "open" command then allow parameter errors
|
|
bOpenCommand = lstrcmpi (lpCommandList, szOpen) == 0;
|
|
|
|
/* Clear all the flags */
|
|
*lpdwFlags = 0;
|
|
|
|
/* Initialize the entry for the callback message window handle */
|
|
wHeaderSize += sizeof (DWORD);
|
|
if (wHeaderSize > wParamsSize)
|
|
{
|
|
wErr = MCIERR_PARAM_OVERFLOW;
|
|
goto error_exit;
|
|
}
|
|
|
|
/* Skip past the header */
|
|
lpFirstCommandItem = (LPSTR)lpCommandList +
|
|
mciEatCommandEntry (lpCommandList, NULL, NULL);
|
|
|
|
wLen = mciEatCommandEntry (lpFirstCommandItem, &dwValue, &wID);
|
|
/* Make room in lpdwOutputParams for the return arguments if any */
|
|
if (wID == MCI_RETURN)
|
|
{
|
|
lpFirstCommandItem += wLen;
|
|
wHeaderSize += mciGetParamSize (dwValue, wID);
|
|
if (wHeaderSize > wParamsSize)
|
|
{
|
|
wErr = MCIERR_PARAM_OVERFLOW;
|
|
goto error_exit;
|
|
}
|
|
}
|
|
|
|
lpOutputParams += wHeaderSize;
|
|
|
|
// Scan the parameter string looking up each parameter in the given command
|
|
// list
|
|
|
|
while (TRUE)
|
|
{
|
|
LPCSTR lpstrArgument = NULL;
|
|
|
|
/* Remove leading blanks */
|
|
while (*lpstrParams == ' ') ++lpstrParams;
|
|
|
|
/* Break at end of parameter string */
|
|
if (*lpstrParams == '\0') break;
|
|
|
|
/* Scan for this parameter in the command list */
|
|
lpCurrentCommandItem = lpFirstCommandItem;
|
|
|
|
wLen = mciEatCommandEntry (lpCurrentCommandItem, &dwValue, &wID);
|
|
|
|
wArgumentPosition = 0;
|
|
|
|
/* While there are more tokens in the Command List */
|
|
while (wID != MCI_END_COMMAND)
|
|
{
|
|
/* Check for a default argument if not already read */
|
|
if (lpDefaultCommandItem == NULL &&
|
|
*lpCurrentCommandItem == '\0')
|
|
{
|
|
// Remember default argument
|
|
lpDefaultCommandItem = lpCurrentCommandItem;
|
|
dwDefaultValue = dwValue;
|
|
wDefaultID = wID;
|
|
wDefaultArgumentPosition = wArgumentPosition;
|
|
// break;
|
|
}
|
|
/* Check to see if this token matches */
|
|
else if ((lpstrArgument =
|
|
mciCheckToken (lpCurrentCommandItem, lpstrParams)) != NULL)
|
|
break;
|
|
|
|
/* This token did not match the input but advance the argument position */
|
|
wArgumentPosition += mciGetParamSize (dwValue, wID);
|
|
|
|
/* Go to next token */
|
|
lpCurrentCommandItem += wLen;
|
|
|
|
// Is this command parameter a constant?
|
|
if (wID == MCI_CONSTANT)
|
|
// Skip constant list
|
|
do
|
|
lpCurrentCommandItem +=
|
|
mciEatCommandEntry (lpCurrentCommandItem, &dwValue, &wID);
|
|
while (wID != MCI_END_CONSTANT);
|
|
|
|
wLen = mciEatCommandEntry (lpCurrentCommandItem, &dwValue, &wID);
|
|
} /* while */
|
|
|
|
/* If there were no matches */
|
|
if (lpstrArgument == NULL)
|
|
{
|
|
// If a default argument exists then try it
|
|
if (lpDefaultCommandItem != NULL)
|
|
{
|
|
lpstrArgument = lpstrParams;
|
|
dwValue = dwDefaultValue;
|
|
wID = wDefaultID;
|
|
lpCurrentCommandItem = lpDefaultCommandItem;
|
|
wArgumentPosition = wDefaultArgumentPosition;
|
|
} else
|
|
{
|
|
// Allow missing paramters on OPEN command if indicated by a non-null
|
|
// lpwOpenError address
|
|
if (!bOpenCommand || lpwOpenError == NULL)
|
|
{
|
|
wErr = MCIERR_UNRECOGNIZED_KEYWORD;
|
|
goto error_exit;
|
|
} else
|
|
{
|
|
// Skip the parameter if OPEN command
|
|
while (*lpstrParams != ' ' && *lpstrParams != '\0')
|
|
++lpstrParams;
|
|
if (lpwOpenError != NULL)
|
|
*lpwOpenError = MCIERR_UNRECOGNIZED_KEYWORD;
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Is there room in the output buffer for this argument? */
|
|
if (wArgumentPosition + wHeaderSize + mciGetParamSize (dwValue, wID)
|
|
> wParamsSize)
|
|
{
|
|
DOUT ("mciParseParams: parameter space overflow\r\n");
|
|
wErr = MCIERR_PARAM_OVERFLOW;
|
|
goto error_exit;
|
|
}
|
|
|
|
// Remove leading blanks
|
|
while (*lpstrArgument == ' ') ++lpstrArgument;
|
|
|
|
/* Process this parameter, filling in any flags or arguments */
|
|
if ((wErr = mciParseArgument (dwValue, wID,
|
|
&lpstrArgument, lpdwFlags,
|
|
&lpOutputParams[wArgumentPosition],
|
|
lpCurrentCommandItem))
|
|
!= 0)
|
|
goto error_exit;
|
|
|
|
lpstrParams = lpstrArgument;
|
|
|
|
if (wID == MCI_STRING)
|
|
{
|
|
if (wPointers >= MCI_MAX_PARAM_SLOTS)
|
|
{
|
|
DOUT ("Warning: Out of pointer list slots in mciParseParams\r\n");
|
|
break;
|
|
}
|
|
|
|
(DWORD)lpstrPointerList[wPointers++] =
|
|
*(LPDWORD)&lpOutputParams[wArgumentPosition];
|
|
}
|
|
|
|
/* Continue reading the parameter string */
|
|
} /* while */
|
|
|
|
// Terminate list
|
|
lpstrPointerList[wPointers] = NULL;
|
|
// Copy reference for caller
|
|
*lpPointerList = lpstrPointerList;
|
|
// Return Success
|
|
return 0;
|
|
|
|
error_exit:
|
|
*lpPointerList = NULL;
|
|
// Terminate list
|
|
lpstrPointerList[wPointers] = NULL;
|
|
mciParserFree (lpstrPointerList);
|
|
return wErr;
|
|
}
|
|
|
|
/*
|
|
* @doc INTERNAL MCI
|
|
* @func UINT | mciParseCommand | This function converts an MCI
|
|
* control string to an MCI control message suitable for sending to
|
|
* <f mciSendCommand>. The input string usually comes from <f mciSendString>
|
|
* and always has the device name stripped off the front.
|
|
*
|
|
* @parm UINT | wDeviceID | Identifies the device. First searches the parsing
|
|
* table belonging to the driver.
|
|
* Then searches the command tables matching the type
|
|
* of the given device. Then searches the core command table.
|
|
*
|
|
* @parm LPSTR | lpstrCommand | An MCI control command without
|
|
* a device name prefix. There must be no leading or trailing
|
|
* blanks.
|
|
*
|
|
* @parm LPCSTR | lpstrDeviceName | The device name (second token on the
|
|
* command line). It is used to identify the device type.
|
|
*
|
|
* @parm LPSTR FAR * | lpCommandList | If not NULL then the address of
|
|
* the command list for the parsed command (if successful) is copied here.
|
|
* It is used later by mciSendString when parsing arguments
|
|
*
|
|
* @parm UINT FAR* | lpwTable | The table resource ID to be unlocked
|
|
* after parsing. Returned to caller.
|
|
*
|
|
* @rdesc Returns the command ID or 0 if not found.
|
|
*
|
|
*/
|
|
UINT PASCAL NEAR
|
|
mciParseCommand(
|
|
UINT wDeviceID,
|
|
LPSTR lpstrCommand,
|
|
LPCSTR lpstrDeviceName,
|
|
LPSTR FAR * lpCommandList,
|
|
UINT FAR* lpwTable)
|
|
{
|
|
LPSTR lpCommandItem;
|
|
UINT wMessage;
|
|
|
|
// Put the command in lower case
|
|
//!! mciToLower (lpstrCommand);
|
|
|
|
// Look up lpstrCommand in the parser's command tables.
|
|
if ((lpCommandItem = FindCommandItem (wDeviceID, lpstrDeviceName,
|
|
lpstrCommand,
|
|
&wMessage, lpwTable))
|
|
== NULL)
|
|
return 0;
|
|
|
|
/* Return the command list to the caller */
|
|
if (lpCommandList != NULL)
|
|
*lpCommandList = lpCommandItem;
|
|
else
|
|
DOUT ("Warning: NULL lpCommandList in mciParseCommanad\r\n");
|
|
|
|
return wMessage;
|
|
}
|
|
|
|
/*
|
|
* @doc INTERNAL MCI
|
|
* @func void | mciParserFree | Free any buffers allocated to
|
|
* receive string arguments.
|
|
*
|
|
* @parm LPSTR FAR * | lpstrPointerList | A NULL terminated list of far
|
|
* pointers to strings to be free'd
|
|
*
|
|
*/
|
|
void PASCAL NEAR
|
|
mciParserFree(
|
|
LPSTR FAR *lpstrPointerList
|
|
)
|
|
{
|
|
LPSTR FAR *lpstrOriginal = lpstrPointerList;
|
|
|
|
if (lpstrPointerList == NULL)
|
|
return;
|
|
|
|
while (*lpstrPointerList != NULL)
|
|
mciFree (*lpstrPointerList++);
|
|
|
|
mciFree (lpstrOriginal);
|
|
}
|