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robfinch |
// ============================================================================
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// __
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// \\__/ o\ (C) 2012-2017 Robert Finch, Waterloo
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// \ __ / All rights reserved.
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// \/_// robfinch<remove>@finitron.ca
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// ||
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//
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// C64 - 'C' derived language compiler
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// - 64 bit CPU
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//
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// This source file is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published
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// by the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This source file is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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// ============================================================================
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//
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#include "stdafx.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifndef __GNUC__
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#include <io.h>
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#endif
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//#include <unistd.h>
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/* ---------------------------------------------------------------------------
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void searchenv(filename, envname, pathname);
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char *filename;
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char *envname;
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char *pathname;
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Description :
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Search for a file by looking in the directories listed in the envname
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environment. Puts the full path name (if you find it) into pathname.
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Otherwise set *pathname to 0. Unlike the DOS PATH command (and the
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microsoft _searchenv), you can use either a space or a semicolon to
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separate directory names. The pathname array must be at least 128
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characters.
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Returns :
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nothing
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--------------------------------------------------------------------------- */
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void searchenv(char *filename, int fnsz, char *envname, char *pathname, int pthsz)
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{
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static char pbuf[5000];
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char *p, *np;
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size_t len;
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// char *strpbrk(), *strtok(), *getenv();
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strcpy_s(pathname, pthsz, filename);
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if (_access(pathname, 0) != -1)
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return;
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/* ----------------------------------------------------------------------
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The file doesn't exist in the current directory. If a specific
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path was requested (ie. file contains \ or /) or if the environment
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isn't set, return a NULL, else search for the file on the path.
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---------------------------------------------------------------------- */
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_dupenv_s(&p, &len, envname);
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if (len==0)
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{
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*pathname = '\0';
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return;
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}
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strncpy_s(pbuf, sizeof(pbuf), p, sizeof(pbuf));
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np = nullptr;
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if (p = strtok_s(pbuf, ";", &np))
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{
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do
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{
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if (p[strlen(p)-1]=='\\')
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sprintf_s(pathname, pthsz-1, "%0.90s%s", p, filename);
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else
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sprintf_s(pathname, pthsz, "%0.90s\\%s", p, filename);
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if (_access(pathname, 0) >= 0)
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return;
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}
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while(p = strtok_s(NULL, ";", &np));
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}
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*pathname = 0;
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}
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