text: /*
   * ----------------------------------------------------------------------------
   * nmakehlp.c --
   *
   *	This is used to fix limitations within nmake and the environment.
   *
   * Copyright (c) 2002 by David Gravereaux.
   * Copyright (c) 2006 by Pat Thoyts
   *
   * See the file "license.terms" for information on usage and redistribution of
   * this file, and for a DISCLAIMER OF ALL WARRANTIES.
   * ----------------------------------------------------------------------------
   */
  
  #define _CRT_SECURE_NO_DEPRECATE
  #include <windows.h>
  #pragma comment (lib, "user32.lib")
  #pragma comment (lib, "kernel32.lib")
  #include <stdio.h>
  #include <math.h>
  
  /*
   * This library is required for x64 builds with _some_ versions of MSVC
   */
  #if defined(_M_IA64) || defined(_M_AMD64)
  #if _MSC_VER >= 1400 && _MSC_VER < 1500
  #pragma comment(lib, "bufferoverflowU")
  #endif
  #endif
  
  /* ISO hack for dumb VC++ */
  #ifdef _MSC_VER
  #define   snprintf	_snprintf
  #endif
  
  
  /* protos */
  
  static int CheckForCompilerFeature(const char *option);
  static int CheckForLinkerFeature(const char **options, int count);
  static int IsIn(const char *string, const char *substring);
  static int SubstituteFile(const char *substs, const char *filename);
  static int QualifyPath(const char *path);
  static int LocateDependency(const char *keyfile);
  static const char *GetVersionFromFile(const char *filename, const char *match, int numdots);
  static DWORD WINAPI ReadFromPipe(LPVOID args);
  
  /* globals */
  
  #define CHUNK	25
  #define STATICBUFFERSIZE    1000
  typedef struct {
      HANDLE pipe;
      char buffer[STATICBUFFERSIZE];
  } pipeinfo;
  
  pipeinfo Out = {INVALID_HANDLE_VALUE, '\0'};
  pipeinfo Err = {INVALID_HANDLE_VALUE, '\0'};
  
  /*
   * exitcodes: 0 == no, 1 == yes, 2 == error
   */
  
  int
  main(
      int argc,
      char *argv[])
  {
      char msg[300];
      DWORD dwWritten;
      int chars;
      const char *s;
  
      /*
       * Make sure children (cl.exe and link.exe) are kept quiet.
       */
  
      SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOOPENFILEERRORBOX);
  
      /*
       * Make sure the compiler and linker aren't effected by the outside world.
       */
  
      SetEnvironmentVariable("CL", "");
      SetEnvironmentVariable("LINK", "");
  
      if (argc > 1 && *argv[1] == '-') {
  	switch (*(argv[1]+1)) {
  	case 'c':
  	    if (argc != 3) {
  		chars = snprintf(msg, sizeof(msg) - 1,
  		        "usage: %s -c <compiler option>\n"
  			"Tests for whether cl.exe supports an option\n"
  			"exitcodes: 0 == no, 1 == yes, 2 == error\n", argv[0]);
  		WriteFile(GetStdHandle(STD_ERROR_HANDLE), msg, chars,
  			&dwWritten, NULL);
  		return 2;
  	    }
  	    return CheckForCompilerFeature(argv[2]);
  	case 'l':
  	    if (argc < 3) {
  		chars = snprintf(msg, sizeof(msg) - 1,
  	       		"usage: %s -l <linker option> ?<mandatory option> ...?\n"
  			"Tests for whether link.exe supports an option\n"
  			"exitcodes: 0 == no, 1 == yes, 2 == error\n", argv[0]);
  		WriteFile(GetStdHandle(STD_ERROR_HANDLE), msg, chars,
  			&dwWritten, NULL);
  		return 2;
  	    }
  	    return CheckForLinkerFeature(&argv[2], argc-2);
  	case 'f':
  	    if (argc == 2) {
  		chars = snprintf(msg, sizeof(msg) - 1,
  			"usage: %s -f <string> <substring>\n"
  			"Find a substring within another\n"
  			"exitcodes: 0 == no, 1 == yes, 2 == error\n", argv[0]);
  		WriteFile(GetStdHandle(STD_ERROR_HANDLE), msg, chars,
  			&dwWritten, NULL);
  		return 2;
  	    } else if (argc == 3) {
  		/*
  		 * If the string is blank, there is no match.
  		 */
  
  		return 0;
  	    } else {
  		return IsIn(argv[2], argv[3]);
  	    }
  	case 's':
  	    if (argc == 2) {
  		chars = snprintf(msg, sizeof(msg) - 1,
  			"usage: %s -s <substitutions file> <file>\n"
  			"Perform a set of string map type substutitions on a file\n"
  			"exitcodes: 0\n",
  			argv[0]);
  		WriteFile(GetStdHandle(STD_ERROR_HANDLE), msg, chars,
  			&dwWritten, NULL);
  		return 2;
  	    }
  	    return SubstituteFile(argv[2], argv[3]);
  	case 'V':
  	    if (argc != 4) {
  		chars = snprintf(msg, sizeof(msg) - 1,
  		    "usage: %s -V filename matchstring\n"
  		    "Extract a version from a file:\n"
  		    "eg: pkgIndex.tcl \"package ifneeded http\"",
  		    argv[0]);
  		WriteFile(GetStdHandle(STD_ERROR_HANDLE), msg, chars,
  		    &dwWritten, NULL);
  		return 0;
  	    }
  	    s = GetVersionFromFile(argv[2], argv[3], *(argv[1]+2) - '0');
  	    if (s && *s) {
  		printf("%s\n", s);
  		return 0;
  	    } else
  		return 1; /* Version not found. Return non-0 exit code */
  
  	case 'Q':
  	    if (argc != 3) {
  		chars = snprintf(msg, sizeof(msg) - 1,
  		    "usage: %s -Q path\n"
  		    "Emit the fully qualified path\n"
  		    "exitcodes: 0 == no, 1 == yes, 2 == error\n", argv[0]);
  		WriteFile(GetStdHandle(STD_ERROR_HANDLE), msg, chars,
  		    &dwWritten, NULL);
  		return 2;
  	    }
  	    return QualifyPath(argv[2]);
  
  	case 'L':
  	    if (argc != 3) {
  		chars = snprintf(msg, sizeof(msg) - 1,
  		    "usage: %s -L keypath\n"
  		    "Emit the fully qualified path of directory containing keypath\n"
  		    "exitcodes: 0 == success, 1 == not found, 2 == error\n", argv[0]);
  		WriteFile(GetStdHandle(STD_ERROR_HANDLE), msg, chars,
  		    &dwWritten, NULL);
  		return 2;
  	    }
  	    return LocateDependency(argv[2]);
  	}
      }
      chars = snprintf(msg, sizeof(msg) - 1,
  	    "usage: %s -c|-f|-l|-Q|-s|-V ...\n"
  	    "This is a little helper app to equalize shell differences between WinNT and\n"
  	    "Win9x and get nmake.exe to accomplish its job.\n",
  	    argv[0]);
      WriteFile(GetStdHandle(STD_ERROR_HANDLE), msg, chars, &dwWritten, NULL);
      return 2;
  }
  
  static int
  CheckForCompilerFeature(
      const char *option)
  {
      STARTUPINFO si;
      PROCESS_INFORMATION pi;
      SECURITY_ATTRIBUTES sa;
      DWORD threadID;
      char msg[300];
      BOOL ok;
      HANDLE hProcess, h, pipeThreads[2];
      char cmdline[100];
  
      hProcess = GetCurrentProcess();
  
      ZeroMemory(&pi, sizeof(PROCESS_INFORMATION));
      ZeroMemory(&si, sizeof(STARTUPINFO));
      si.cb = sizeof(STARTUPINFO);
      si.dwFlags   = STARTF_USESTDHANDLES;
      si.hStdInput = INVALID_HANDLE_VALUE;
  
      ZeroMemory(&sa, sizeof(SECURITY_ATTRIBUTES));
      sa.nLength = sizeof(SECURITY_ATTRIBUTES);
      sa.lpSecurityDescriptor = NULL;
      sa.bInheritHandle = FALSE;
  
      /*
       * Create a non-inheritible pipe.
       */
  
      CreatePipe(&Out.pipe, &h, &sa, 0);
  
      /*
       * Dupe the write side, make it inheritible, and close the original.
       */
  
      DuplicateHandle(hProcess, h, hProcess, &si.hStdOutput, 0, TRUE,
  	    DUPLICATE_SAME_ACCESS | DUPLICATE_CLOSE_SOURCE);
  
      /*
       * Same as above, but for the error side.
       */
  
      CreatePipe(&Err.pipe, &h, &sa, 0);
      DuplicateHandle(hProcess, h, hProcess, &si.hStdError, 0, TRUE,
  	    DUPLICATE_SAME_ACCESS | DUPLICATE_CLOSE_SOURCE);
  
      /*
       * Base command line.
       */
  
      lstrcpy(cmdline, "cl.exe -nologo -c -TC -Zs -X -Fp.\\_junk.pch ");
  
      /*
       * Append our option for testing
       */
  
      lstrcat(cmdline, option);
  
      /*
       * Filename to compile, which exists, but is nothing and empty.
       */
  
      lstrcat(cmdline, " .\\nul");
  
      ok = CreateProcess(
  	    NULL,	    /* Module name. */
  	    cmdline,	    /* Command line. */
  	    NULL,	    /* Process handle not inheritable. */
  	    NULL,	    /* Thread handle not inheritable. */
  	    TRUE,	    /* yes, inherit handles. */
  	    DETACHED_PROCESS, /* No console for you. */
  	    NULL,	    /* Use parent's environment block. */
  	    NULL,	    /* Use parent's starting directory. */
  	    &si,	    /* Pointer to STARTUPINFO structure. */
  	    &pi);	    /* Pointer to PROCESS_INFORMATION structure. */
  
      if (!ok) {
  	DWORD err = GetLastError();
  	int chars = snprintf(msg, sizeof(msg) - 1,
  		"Tried to launch: \"%s\", but got error [%u]: ", cmdline, err);
  
  	FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS|
  		FORMAT_MESSAGE_MAX_WIDTH_MASK, 0L, err, 0, (LPVOID)&msg[chars],
  		(300-chars), 0);
  	WriteFile(GetStdHandle(STD_ERROR_HANDLE), msg, lstrlen(msg), &err,NULL);
  	return 2;
      }
  
      /*
       * Close our references to the write handles that have now been inherited.
       */
  
      CloseHandle(si.hStdOutput);
      CloseHandle(si.hStdError);
  
      WaitForInputIdle(pi.hProcess, 5000);
      CloseHandle(pi.hThread);
  
      /*
       * Start the pipe reader threads.
       */
  
      pipeThreads[0] = CreateThread(NULL, 0, ReadFromPipe, &Out, 0, &threadID);
      pipeThreads[1] = CreateThread(NULL, 0, ReadFromPipe, &Err, 0, &threadID);
  
      /*
       * Block waiting for the process to end.
       */
  
      WaitForSingleObject(pi.hProcess, INFINITE);
      CloseHandle(pi.hProcess);
  
      /*
       * Wait for our pipe to get done reading, should it be a little slow.
       */
  
      WaitForMultipleObjects(2, pipeThreads, TRUE, 500);
      CloseHandle(pipeThreads[0]);
      CloseHandle(pipeThreads[1]);
  
      /*
       * Look for the commandline warning code in both streams.
       *  - in MSVC 6 & 7 we get D4002, in MSVC 8 we get D9002.
       */
  
      return !(strstr(Out.buffer, "D4002") != NULL
               || strstr(Err.buffer, "D4002") != NULL
               || strstr(Out.buffer, "D9002") != NULL
               || strstr(Err.buffer, "D9002") != NULL
               || strstr(Out.buffer, "D2021") != NULL
               || strstr(Err.buffer, "D2021") != NULL);
  }
  
  static int
  CheckForLinkerFeature(
      const char **options,
      int count)
  {
      STARTUPINFO si;
      PROCESS_INFORMATION pi;
      SECURITY_ATTRIBUTES sa;
      DWORD threadID;
      char msg[300];
      BOOL ok;
      HANDLE hProcess, h, pipeThreads[2];
      int i;
      char cmdline[255];
  
      hProcess = GetCurrentProcess();
  
      ZeroMemory(&pi, sizeof(PROCESS_INFORMATION));
      ZeroMemory(&si, sizeof(STARTUPINFO));
      si.cb = sizeof(STARTUPINFO);
      si.dwFlags   = STARTF_USESTDHANDLES;
      si.hStdInput = INVALID_HANDLE_VALUE;
  
      ZeroMemory(&sa, sizeof(SECURITY_ATTRIBUTES));
      sa.nLength = sizeof(SECURITY_ATTRIBUTES);
      sa.lpSecurityDescriptor = NULL;
      sa.bInheritHandle = TRUE;
  
      /*
       * Create a non-inheritible pipe.
       */
  
      CreatePipe(&Out.pipe, &h, &sa, 0);
  
      /*
       * Dupe the write side, make it inheritible, and close the original.
       */
  
      DuplicateHandle(hProcess, h, hProcess, &si.hStdOutput, 0, TRUE,
  	    DUPLICATE_SAME_ACCESS | DUPLICATE_CLOSE_SOURCE);
  
      /*
       * Same as above, but for the error side.
       */
  
      CreatePipe(&Err.pipe, &h, &sa, 0);
      DuplicateHandle(hProcess, h, hProcess, &si.hStdError, 0, TRUE,
  	    DUPLICATE_SAME_ACCESS | DUPLICATE_CLOSE_SOURCE);
  
      /*
       * Base command line.
       */
  
      lstrcpy(cmdline, "link.exe -nologo ");
  
      /*
       * Append our option for testing.
       */
  
      for (i = 0; i < count; i++) {
  	lstrcat(cmdline, " \"");
  	lstrcat(cmdline, options[i]);
  	lstrcat(cmdline, "\"");
      }
  
      ok = CreateProcess(
  	    NULL,	    /* Module name. */
  	    cmdline,	    /* Command line. */
  	    NULL,	    /* Process handle not inheritable. */
  	    NULL,	    /* Thread handle not inheritable. */
  	    TRUE,	    /* yes, inherit handles. */
  	    DETACHED_PROCESS, /* No console for you. */
  	    NULL,	    /* Use parent's environment block. */
  	    NULL,	    /* Use parent's starting directory. */
  	    &si,	    /* Pointer to STARTUPINFO structure. */
  	    &pi);	    /* Pointer to PROCESS_INFORMATION structure. */
  
      if (!ok) {
  	DWORD err = GetLastError();
  	int chars = snprintf(msg, sizeof(msg) - 1,
  		"Tried to launch: \"%s\", but got error [%u]: ", cmdline, err);
  
  	FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS|
  		FORMAT_MESSAGE_MAX_WIDTH_MASK, 0L, err, 0, (LPVOID)&msg[chars],
  		(300-chars), 0);
  	WriteFile(GetStdHandle(STD_ERROR_HANDLE), msg, lstrlen(msg), &err,NULL);
  	return 2;
      }
  
      /*
       * Close our references to the write handles that have now been inherited.
       */
  
      CloseHandle(si.hStdOutput);
      CloseHandle(si.hStdError);
  
      WaitForInputIdle(pi.hProcess, 5000);
      CloseHandle(pi.hThread);
  
      /*
       * Start the pipe reader threads.
       */
  
      pipeThreads[0] = CreateThread(NULL, 0, ReadFromPipe, &Out, 0, &threadID);
      pipeThreads[1] = CreateThread(NULL, 0, ReadFromPipe, &Err, 0, &threadID);
  
      /*
       * Block waiting for the process to end.
       */
  
      WaitForSingleObject(pi.hProcess, INFINITE);
      CloseHandle(pi.hProcess);
  
      /*
       * Wait for our pipe to get done reading, should it be a little slow.
       */
  
      WaitForMultipleObjects(2, pipeThreads, TRUE, 500);
      CloseHandle(pipeThreads[0]);
      CloseHandle(pipeThreads[1]);
  
      /*
       * Look for the commandline warning code in the stderr stream.
       */
  
      return !(strstr(Out.buffer, "LNK1117") != NULL ||
  	    strstr(Err.buffer, "LNK1117") != NULL ||
  	    strstr(Out.buffer, "LNK4044") != NULL ||
  	    strstr(Err.buffer, "LNK4044") != NULL ||
  	    strstr(Out.buffer, "LNK4224") != NULL ||
  	    strstr(Err.buffer, "LNK4224") != NULL);
  }
  
  static DWORD WINAPI
  ReadFromPipe(
      LPVOID args)
  {
      pipeinfo *pi = (pipeinfo *) args;
      char *lastBuf = pi->buffer;
      DWORD dwRead;
      BOOL ok;
  
    again:
      if (lastBuf - pi->buffer + CHUNK > STATICBUFFERSIZE) {
  	CloseHandle(pi->pipe);
  	return (DWORD)-1;
      }
      ok = ReadFile(pi->pipe, lastBuf, CHUNK, &dwRead, 0L);
      if (!ok || dwRead == 0) {
  	CloseHandle(pi->pipe);
  	return 0;
      }
      lastBuf += dwRead;
      goto again;
  
      return 0;  /* makes the compiler happy */
  }
  
  static int
  IsIn(
      const char *string,
      const char *substring)
  {
      return (strstr(string, substring) != NULL);
  }
  
  /*
   * GetVersionFromFile --
   * 	Looks for a match string in a file and then returns the version
   * 	following the match where a version is anything acceptable to
   * 	package provide or package ifneeded.
   */
  
  static const char *
  GetVersionFromFile(
      const char *filename,
      const char *match,
      int numdots)
  {
      size_t cbBuffer = 100;
      static char szBuffer[100];
      char *szResult = NULL;
      FILE *fp = fopen(filename, "rt");
  
      if (fp != NULL) {
  	/*
  	 * Read data until we see our match string.
  	 */
  
  	while (fgets(szBuffer, cbBuffer, fp) != NULL) {
  	    LPSTR p, q;
  
  	    p = strstr(szBuffer, match);
  	    if (p != NULL) {
  		/*
  		 * Skip to first digit after the match.
  		 */
  
  		p += strlen(match);
  		while (*p && !isdigit(*p)) {
  		    ++p;
  		}
  
  		/*
  		 * Find ending whitespace.
  		 */
  
  		q = p;
  		while (*q && (strchr("0123456789.ab", *q)) && ((!strchr(".ab", *q)
  			    && (!strchr("ab", q[-1])) || --numdots))) {
  		    ++q;
  		}
  
  		memcpy(szBuffer, p, q - p);
  		szBuffer[q-p] = 0;
  		szResult = szBuffer;
  		break;
  	    }
  	}
  	fclose(fp);
      }
      return szResult;
  }
  
  /*
   * List helpers for the SubstituteFile function
   */
  
  typedef struct list_item_t {
      struct list_item_t *nextPtr;
      char * key;
      char * value;
  } list_item_t;
  
  /* insert a list item into the list (list may be null) */
  static list_item_t *
  list_insert(list_item_t **listPtrPtr, const char *key, const char *value)
  {
      list_item_t *itemPtr = malloc(sizeof(list_item_t));
      if (itemPtr) {
  	itemPtr->key = strdup(key);
  	itemPtr->value = strdup(value);
  	itemPtr->nextPtr = NULL;
  
  	while(*listPtrPtr) {
  	    listPtrPtr = &(*listPtrPtr)->nextPtr;
  	}
  	*listPtrPtr = itemPtr;
      }
      return itemPtr;
  }
  
  static void
  list_free(list_item_t **listPtrPtr)
  {
      list_item_t *tmpPtr, *listPtr = *listPtrPtr;
      while (listPtr) {
  	tmpPtr = listPtr;
  	listPtr = listPtr->nextPtr;
  	free(tmpPtr->key);
  	free(tmpPtr->value);
  	free(tmpPtr);
      }
  }
  
  /*
   * SubstituteFile --
   *	As windows doesn't provide anything useful like sed and it's unreliable
   *	to use the tclsh you are building against (consider x-platform builds -
   *	eg compiling AMD64 target from IX86) we provide a simple substitution
   *	option here to handle autoconf style substitutions.
   *	The substitution file is whitespace and line delimited. The file should
   *	consist of lines matching the regular expression:
   *	  \s*\S+\s+\S*$
   *
   *	Usage is something like:
   *	  nmakehlp -S << $** > $@
   *        @PACKAGE_NAME@ $(PACKAGE_NAME)
   *        @PACKAGE_VERSION@ $(PACKAGE_VERSION)
   *        <<
   */
  
  static int
  SubstituteFile(
      const char *substitutions,
      const char *filename)
  {
      size_t cbBuffer = 1024;
      static char szBuffer[1024], szCopy[1024];
      char *szResult = NULL;
      list_item_t *substPtr = NULL;
      FILE *fp, *sp;
  
      fp = fopen(filename, "rt");
      if (fp != NULL) {
  
  	/*
  	 * Build a list of substutitions from the first filename
  	 */
  
  	sp = fopen(substitutions, "rt");
  	if (sp != NULL) {
  	    while (fgets(szBuffer, cbBuffer, sp) != NULL) {
  		unsigned char *ks, *ke, *vs, *ve;
  		ks = (unsigned char*)szBuffer;
  		while (ks && *ks && isspace(*ks)) ++ks;
  		ke = ks;
  		while (ke && *ke && !isspace(*ke)) ++ke;
  		vs = ke;
  		while (vs && *vs && isspace(*vs)) ++vs;
  		ve = vs;
  		while (ve && *ve && !(*ve == '\r' || *ve == '\n')) ++ve;
  		*ke = 0, *ve = 0;
  		list_insert(&substPtr, (char*)ks, (char*)vs);
  	    }
  	    fclose(sp);
  	}
  
  	/* debug: dump the list */
  #ifdef _DEBUG
  	{
  	    int n = 0;
  	    list_item_t *p = NULL;
  	    for (p = substPtr; p != NULL; p = p->nextPtr, ++n) {
  		fprintf(stderr, "% 3d '%s' => '%s'\n", n, p->key, p->value);
  	    }
  	}
  #endif
  
  	/*
  	 * Run the substitutions over each line of the input
  	 */
  
  	while (fgets(szBuffer, cbBuffer, fp) != NULL) {
  	    list_item_t *p = NULL;
  	    for (p = substPtr; p != NULL; p = p->nextPtr) {
  		char *m = strstr(szBuffer, p->key);
  		if (m) {
  		    char *cp, *op, *sp;
  		    cp = szCopy;
  		    op = szBuffer;
  		    while (op != m) *cp++ = *op++;
  		    sp = p->value;
  		    while (sp && *sp) *cp++ = *sp++;
  		    op += strlen(p->key);
  		    while (*op) *cp++ = *op++;
  		    *cp = 0;
  		    memcpy(szBuffer, szCopy, sizeof(szCopy));
  		}
  	    }
  	    printf(szBuffer);
  	}
  
  	list_free(&substPtr);
      }
      fclose(fp);
      return 0;
  }
  
  BOOL FileExists(LPCTSTR szPath)
  {
  #ifndef INVALID_FILE_ATTRIBUTES
      #define INVALID_FILE_ATTRIBUTES ((DWORD)-1) 
  #endif
      DWORD pathAttr = GetFileAttributes(szPath);
      return (pathAttr != INVALID_FILE_ATTRIBUTES && 
  	    !(pathAttr & FILE_ATTRIBUTE_DIRECTORY));
  }
  
  
  /*
   * QualifyPath --
   *
   *	This composes the current working directory with a provided path
   *	and returns the fully qualified and normalized path.
   *	Mostly needed to setup paths for testing.
   */
  
  static int
  QualifyPath(
      const char *szPath)
  {
      char szCwd[MAX_PATH + 1];
  
  	GetFullPathName(szPath, sizeof(szCwd)-1, szCwd, NULL);
      printf("%s\n", szCwd);
      return 0;
  }
  
  /*
   * Implements LocateDependency for a single directory. See that command
   * for an explanation.
   * Returns 0 if found after printing the directory.
   * Returns 1 if not found but no errors.
   * Returns 2 on any kind of error
   * Basically, these are used as exit codes for the process.
   */
  static int LocateDependencyHelper(const char *dir, const char *keypath)
  {
      HANDLE hSearch;
      char path[MAX_PATH+1];
      int dirlen, keylen, ret;
      WIN32_FIND_DATA finfo;
  
      if (dir == NULL || keypath == NULL)
  	return 2; /* Have no real error reporting mechanism into nmake */
      dirlen = strlen(dir);
      if ((dirlen + 3) > sizeof(path))
  	return 2;
      strncpy(path, dir, dirlen);
      strncpy(path+dirlen, "\\*", 3);	/* Including terminating \0 */
      keylen = strlen(keypath);
  
  #if 0 /* This function is not available in Visual C++ 6 */
      /*
       * Use numerics 0 -> FindExInfoStandard,
       * 1 -> FindExSearchLimitToDirectories, 
       * as these are not defined in Visual C++ 6
       */
      hSearch = FindFirstFileEx(path, 0, &finfo, 1, NULL, 0);
  #else
      hSearch = FindFirstFile(path, &finfo);
  #endif
      if (hSearch == INVALID_HANDLE_VALUE)
  	return 1; /* Not found */
  
      /* Loop through all subdirs checking if the keypath is under there */
      ret = 1; /* Assume not found */
      do {
  	int sublen;
  	/*
  	 * We need to check it is a directory despite the 
  	 * FindExSearchLimitToDirectories in the above call. See SDK docs
  	 */
  	if ((finfo.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) == 0)
  	    continue;
  	sublen = strlen(finfo.cFileName);
  	if ((dirlen+1+sublen+1+keylen+1) > sizeof(path))
  	    continue;		/* Path does not fit, assume not matched */
  	strncpy(path+dirlen+1, finfo.cFileName, sublen);
  	path[dirlen+1+sublen] = '\\';
  	strncpy(path+dirlen+1+sublen+1, keypath, keylen+1);
  	if (FileExists(path)) {
  	    /* Found a match, print to stdout */
  	    path[dirlen+1+sublen] = '\0';
  	    QualifyPath(path);
  	    ret = 0;
  	    break;
  	}
      } while (FindNextFile(hSearch, &finfo));
      FindClose(hSearch);
      return ret;
  }
  
  /*
   * LocateDependency --
   *
   *	Locates a dependency for a package.
   *        keypath - a relative path within the package directory
   *          that is used to confirm it is the correct directory.
   *	The search path for the package directory is currently only
   *      the parent and grandparent of the current working directory.
   *      If found, the command prints 
   *         name_DIRPATH=<full path of located directory>
   *      and returns 0. If not found, does not print anything and returns 1.
   */
  static int LocateDependency(const char *keypath)
  {
      int i, ret;
      static char *paths[] = {"..", "..\\..", "..\\..\\.."};
      
      for (i = 0; i < (sizeof(paths)/sizeof(paths[0])); ++i) {
  	ret = LocateDependencyHelper(paths[i], keypath);
  	if (ret == 0)
  	    return ret;
      }
      return ret;
  }
  
  
  /*
   * Local variables:
   *   mode: c
   *   c-basic-offset: 4
   *   fill-column: 78
   *   indent-tabs-mode: t
   *   tab-width: 8
   * End:
   */
  