175 lines
3.0 KiB
C
175 lines
3.0 KiB
C
// calback.c
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//
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// these are the default callbacks for the library
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//
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#include <string.h>
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#include <stdio.h>
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#include <malloc.h>
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#include <stdlib.h>
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#include <io.h>
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#if defined(OS2)
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#define INCL_NOCOMMON
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#define INCL_DOSPROCESS
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#define INCL_DOSSEMAPHORES
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#define INCL_DOSFILEMGR
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#define INCL_DOSERRORS
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#define INCL_DOSMISC
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#include <os2.h>
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#else
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#include <windows.h>
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#endif
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#include <dos.h>
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#include "hungary.h"
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#include "bsc.h"
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typedef char bscbuf[2048];
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// you must define the following callbacks for the library to use
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LPV BSC_API LpvAllocCb(WORD cb)
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// allocate a block of memory
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//
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{
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return malloc(cb);
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}
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VOID BSC_API FreeLpv(LPV lpv)
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// free a block of memory
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//
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{
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free(lpv);
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}
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VOID BSC_API SeekError(LSZ lszFileName) // do not return!
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// error handling
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//
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{
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BSCPrintf("BSC Library: Error seeking in file '%s'\n", lszFileName);
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exit(1);
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}
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VOID BSC_API ReadError(LSZ lszFileName) // do not return!
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// error handling
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//
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{
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BSCPrintf("BSC Library: Error reading in file '%s'\n", lszFileName);
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exit(1);
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}
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VOID BSC_API BadBSCVer(LSZ lszFileName) // do not return!
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// error handling
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//
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{
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BSCPrintf("BSC Library: '%s' not in current .bsc format\n", lszFileName);
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exit(1);
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}
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FILEHANDLE BSC_API
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BSCOpen(LSZ lszFileName, FILEMODE mode)
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// open the specified file
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//
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{
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#if defined (OS2)
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bscbuf b;
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strcpy(b, lszFileName);
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return open(b, mode);
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#else
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return OpenFile( lszFileName, mode, FALSE, FILE_SHARE_READ);
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#endif
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}
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int BSC_API
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BSCRead(FILEHANDLE handle, LPCH lpchBuf, WORD cb)
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// read in the specified number of bytes
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//
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{
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#if defined (OS2)
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bscbuf b;
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while (cb > sizeof(b)) {
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if (read(handle, b, sizeof(b)) == -1) return -1;
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memcpy(lpchBuf, b, sizeof(b));
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cb -= sizeof(b);
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lpchBuf += sizeof(b);
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}
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if (read(handle, b, cb) == -1) return -1;
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memcpy(lpchBuf, b, cb);
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return cb;
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#else
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return ReadFile(handle, lpchBuf, cb);
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#endif
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}
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int BSC_API
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BSCClose(FILEHANDLE handle)
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// close the specified handle
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//
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{
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#if defined (OS2)
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return close(handle);
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#else
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return !CloseHandle( handle );
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#endif
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}
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int BSC_API
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BSCSeek(FILEHANDLE handle, long lPos, FILEMODE mode)
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// seek on the specified handle
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//
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{
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#if defined (OS2)
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if (lseek(handle, lPos, mode) == -1)
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return -1;
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else
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return 0;
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#else
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if (SetFilePointer( handle, lPos, 0L, mode) == -1) {
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return -1;
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} else {
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return 0;
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}
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#endif
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}
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VOID BSC_API
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BSCOutput(LSZ lsz)
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// write the given string to the standard output
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//
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{
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bscbuf b;
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int cb;
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cb = strlen(lsz);
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while (cb > sizeof(b)) {
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memcpy(b, lsz, sizeof(b));
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if (write(1, b, sizeof(b)) == -1) return;
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cb -= sizeof(b);
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lsz += sizeof(b);
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}
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memcpy(b, lsz, cb);
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write(1, b, cb);
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return;
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}
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#ifdef DEBUG
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VOID BSC_API
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BSCDebugOut(LSZ lsz)
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// ignore debug output by default
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//
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{
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// unreferenced lsz
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lsz = NULL;
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}
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#endif
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