89 lines
2.9 KiB
C
89 lines
2.9 KiB
C
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#include "precomp.h"
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#pragma hdrstop
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/***************************************************************************/
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/***** Common Library Component - Path Manipulation Routines - 2 ***********/
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/***************************************************************************/
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/*
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** Purpose:
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** Creates a valid FAT path from two pieces - a dir string (includes
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** drive, colon, root backslash and zero or more subdirs - backslash
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** at end is optional), and a subpath string.
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** Arguments:
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** szDir: string to a volume consisting of a drive letter (upper
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** or lower case), a colon, a root backslash, and zero or more
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** subdirs, optionally ending with a backslash.
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** szSubPath: string for a subpath of zero or more subdirs and a file
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** name separated by backslashes. (No backslash at the beginning.)
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** szBuf: buffer in which to store the constructed FAT path. It
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** have room for cchpBufMax physical characters which will include
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** the zero terminator.
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** cchpBufMax: non-negative maximum number of useable physical
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** characters in szBuf.
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** Returns:
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** fFalse if any of the string buffers are NULL, if szDir does not
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** start with a valid drive letter, colon and root backslash, or
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** if szSubPath starts with a backslash or is invalid, or if there
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** is not enough space in szBuf to store the newly constructed FAT
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** path.
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** fTrue if a valid FAT path can be constructed from the pieces and
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** stored in szBuf.
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**
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**************************************************************************/
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BOOL APIENTRY FMakeFATPathFromDirAndSubPath(szDir, szSubPath,
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szBuf, cchpBufMax)
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SZ szDir;
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SZ szSubPath;
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SZ szBuf;
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CCHP cchpBufMax;
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{
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CB cbBackSlash = (CB)0;
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SZ szPathTmp;
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SZ szLastChar;
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CB cb;
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AssertDataSeg();
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ChkArg(szDir != (SZ)NULL &&
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*szDir != '\0', 1, fFalse);
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ChkArg(szSubPath != (SZ)NULL, 2, fFalse);
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ChkArg(szBuf != (SZ)NULL, 3, fFalse);
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ChkArg(cchpBufMax > (CCHP)4, 4, fFalse);
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EvalAssert((szLastChar = SzLastChar(szDir)) != (SZ)NULL);
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//
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// szLastChar could be a lead byte, but lead bytes aren't in the
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// ASCII range so we just check for the \ without checking if
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// szLastChar is a lead byte.
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//
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if(*szLastChar != '\\') {
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cbBackSlash = (CB)2;
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}
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cb = strlen(szDir) + strlen(szSubPath) + cbBackSlash + 1;
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if ((szPathTmp = SAlloc(cb)) == (SZ)NULL ||
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strcpy(szPathTmp, szDir) != szPathTmp ||
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(cbBackSlash > 0 &&
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SzStrCat(szPathTmp, "\\") != szPathTmp) ||
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SzStrCat(szPathTmp, szSubPath) != szPathTmp)
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{
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if(szPathTmp) {
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SFree(szPathTmp);
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}
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return(fFalse);
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}
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if (_fullpath(szBuf, szPathTmp, cchpBufMax) == (SZ)NULL)
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{
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SFree(szPathTmp);
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return(fFalse);
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}
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SFree(szPathTmp);
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return fTrue;
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}
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