156 lines
2.3 KiB
C
156 lines
2.3 KiB
C
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/* stream.c - OLE stream I/O routines.
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*
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* Created by Microsoft Corporation.
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*/
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#include "packager.h"
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static LPSTR *glplpstr;
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static STREAMOP gsop;
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/* SetFile() - Set the file to be written.
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*/
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VOID
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SetFile(
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STREAMOP sop,
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INT fh,
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LPSTR *lplpstr
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)
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{
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switch (gsop = sop)
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{
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case SOP_FILE:
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glpStream->fh = fh;
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break;
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case SOP_MEMORY:
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gcbObject = 0L;
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glplpstr = lplpstr;
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break;
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}
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}
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/* ReadStream() - Read bytes from memory, from a file, or just count them.
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*/
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DWORD
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ReadStream(
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LPAPPSTREAM lpStream,
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LPSTR lpstr,
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DWORD cb
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)
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{
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switch (gsop)
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{
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case SOP_FILE:
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return _lread(lpStream->fh, lpstr, cb);
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break;
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case SOP_MEMORY:
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gcbObject += cb;
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if (glplpstr)
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MemRead(glplpstr, lpstr, cb);
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break;
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}
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return cb;
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}
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/* PosStream() - Reset the position of the file pointer.
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*
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* Note: This is never used; luckily, or it would mess up the count.
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*/
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DWORD
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PosStream(
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LPAPPSTREAM lpStream,
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LONG pos,
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INT iorigin)
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{
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return _llseek(lpStream->fh, pos, iorigin);
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}
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/* WriteStream() - Write bytes to memory, to a file, or just count them.
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*/
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DWORD
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WriteStream(
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LPAPPSTREAM lpStream,
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LPSTR lpstr,
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DWORD cb
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)
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{
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switch (gsop)
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{
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case SOP_FILE:
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return _lwrite(lpStream->fh, lpstr, cb);
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case SOP_MEMORY:
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gcbObject += cb;
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if (glplpstr)
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MemWrite(glplpstr, lpstr, cb);
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break;
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}
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return cb;
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}
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/********************* Memory read/write functions ********************/
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/* MemRead() - Read bytes from the memory (stream).
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*/
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DWORD
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MemRead(
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LPSTR *lplpStream,
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LPSTR lpItem,
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DWORD dwSize
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)
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{
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DWORD cb;
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CHAR *hpDest = lpItem;
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CHAR *hpSrc = *lplpStream;
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for (cb = dwSize; cb; cb--)
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*hpDest++ = *hpSrc++;
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*lplpStream = hpSrc;
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return dwSize;
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}
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/* MemWrite() - Write bytes to the memory (stream).
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*/
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DWORD
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MemWrite(
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LPSTR *lplpStream,
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LPSTR lpItem,
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DWORD dwSize
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)
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{
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DWORD cb;
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CHAR *hpDest = *lplpStream;
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CHAR *hpSrc = lpItem;
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for (cb = dwSize; cb; cb--)
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*hpDest++ = *hpSrc++;
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*lplpStream = hpDest;
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return dwSize;
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}
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