564 lines
16 KiB
C
564 lines
16 KiB
C
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/*
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* $Id: load.c,v 4.20 2007/02/04 22:17:39 bkorb Exp $
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* Time-stamp: "2007-02-04 11:54:57 bkorb"
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*
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* This file contains the routines that deal with processing text strings
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* for options, either from a NUL-terminated string passed in or from an
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* rc/ini file.
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*/
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/*
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* Automated Options copyright 1992-2007 Bruce Korb
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*
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* Automated Options is free software.
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* You may redistribute it and/or modify it under the terms of the
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* GNU General Public License, as published by the Free Software
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* Foundation; either version 2, or (at your option) any later version.
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*
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* Automated Options 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 Automated Options. See the file "COPYING". If not,
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* write to: The Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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* As a special exception, Bruce Korb gives permission for additional
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* uses of the text contained in his release of AutoOpts.
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*
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* The exception is that, if you link the AutoOpts library with other
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* files to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the AutoOpts library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by Bruce Korb under
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* the name AutoOpts. If you copy code from other sources under the
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* General Public License into a copy of AutoOpts, as the General Public
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* License permits, the exception does not apply to the code that you add
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* in this way. To avoid misleading anyone as to the status of such
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* modified files, you must delete this exception notice from them.
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*
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* If you write modifications of your own for AutoOpts, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice.
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*/
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tOptionLoadMode option_load_mode = OPTION_LOAD_UNCOOKED;
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/* = = = START-STATIC-FORWARD = = = */
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/* static forward declarations maintained by :mkfwd */
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static ag_bool
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insertProgramPath(
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char* pzBuf,
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int bufSize,
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tCC* pzName,
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tCC* pzProgPath );
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static ag_bool
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insertEnvVal(
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char* pzBuf,
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int bufSize,
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tCC* pzName,
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tCC* pzProgPath );
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static char*
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assembleArgValue( char* pzTxt, tOptionLoadMode mode );
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/* = = = END-STATIC-FORWARD = = = */
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/*=export_func optionMakePath
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* private:
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*
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* what: translate and construct a path
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* arg: + char* + pzBuf + The result buffer +
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* arg: + int + bufSize + The size of this buffer +
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* arg: + char const* + pzName + The input name +
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* arg: + char const* + pzProgPath + The full path of the current program +
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*
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* ret-type: ag_bool
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* ret-desc: AG_TRUE if the name was handled, otherwise AG_FALSE.
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* If the name does not start with ``$'', then it is handled
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* simply by copying the input name to the output buffer and
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* resolving the name with either @code{canonicalize_file_name(3GLIBC)}
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* or @code{realpath(3C)}.
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*
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* doc:
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*
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* This routine will copy the @code{pzName} input name into the @code{pzBuf}
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* output buffer, carefully not exceeding @code{bufSize} bytes. If the
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* first character of the input name is a @code{'$'} character, then there
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* is special handling:
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* @*
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* @code{$$} is replaced with the directory name of the @code{pzProgPath},
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* searching @code{$PATH} if necessary.
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* @*
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* @code{$@} is replaced with the AutoGen package data installation directory
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* (aka @code{pkgdatadir}).
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* @*
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* @code{$NAME} is replaced by the contents of the @code{NAME} environment
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* variable. If not found, the search fails.
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*
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* Please note: both @code{$$} and @code{$NAME} must be at the start of the
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* @code{pzName} string and must either be the entire string or be followed
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* by the @code{'/'} (backslash on windows) character.
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*
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* err: @code{AG_FALSE} is returned if:
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* @*
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* @bullet{} The input name exceeds @code{bufSize} bytes.
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* @*
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* @bullet{} @code{$$}, @code{$@@} or @code{$NAME} is not the full string
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* and the next character is not '/'.
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* @*
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* @bullet{} libopts was built without PKGDATADIR defined and @code{$@@}
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* was specified.
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* @*
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* @bullet{} @code{NAME} is not a known environment variable
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* @*
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* @bullet{} @code{canonicalize_file_name} or @code{realpath} return
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* errors (cannot resolve the resulting path).
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=*/
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ag_bool
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optionMakePath(
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char* pzBuf,
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int bufSize,
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tCC* pzName,
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tCC* pzProgPath )
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{
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size_t name_len = strlen( pzName );
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# ifndef PKGDATADIR
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# define PKGDATADIR ""
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# endif
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tSCC pkgdatadir[] = PKGDATADIR;
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ag_bool res = AG_TRUE;
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if (bufSize <= name_len)
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return AG_FALSE;
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/*
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* IF not an environment variable, just copy the data
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*/
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if (*pzName != '$') {
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tCC* pzS = pzName;
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char* pzD = pzBuf;
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int ct = bufSize;
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for (;;) {
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if ( (*(pzD++) = *(pzS++)) == NUL)
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break;
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if (--ct <= 0)
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return AG_FALSE;
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}
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}
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/*
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* IF the name starts with "$$", then it must be "$$" or
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* it must start with "$$/". In either event, replace the "$$"
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* with the path to the executable and append a "/" character.
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*/
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else switch (pzName[1]) {
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case NUL:
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return AG_FALSE;
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case '$':
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res = insertProgramPath( pzBuf, bufSize, pzName, pzProgPath );
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break;
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case '@':
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if (pkgdatadir[0] == NUL)
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return AG_FALSE;
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if (name_len + sizeof (pkgdatadir) > bufSize)
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return AG_FALSE;
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strcpy(pzBuf, pkgdatadir);
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strcpy(pzBuf + sizeof(pkgdatadir) - 1, pzName + 2);
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break;
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default:
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res = insertEnvVal( pzBuf, bufSize, pzName, pzProgPath );
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}
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if (! res)
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return AG_FALSE;
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#if defined(HAVE_CANONICALIZE_FILE_NAME)
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{
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char* pz = canonicalize_file_name(pzBuf);
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if (pz == NULL)
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return AG_FALSE;
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if (strlen(pz) < bufSize)
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strcpy(pzBuf, pz);
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free(pz);
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}
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#elif defined(HAVE_REALPATH)
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{
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char z[ PATH_MAX+1 ];
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if (realpath( pzBuf, z ) == NULL)
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return AG_FALSE;
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if (strlen(z) < bufSize)
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strcpy( pzBuf, z );
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}
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#endif
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return AG_TRUE;
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}
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static ag_bool
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insertProgramPath(
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char* pzBuf,
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int bufSize,
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tCC* pzName,
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tCC* pzProgPath )
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{
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tCC* pzPath;
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tCC* pz;
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int skip = 2;
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switch (pzName[2]) {
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case DIRCH:
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skip = 3;
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case NUL:
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break;
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default:
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return AG_FALSE;
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}
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/*
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* See if the path is included in the program name.
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* If it is, we're done. Otherwise, we have to hunt
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* for the program using "pathfind".
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*/
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if (strchr( pzProgPath, DIRCH ) != NULL)
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pzPath = pzProgPath;
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else {
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pzPath = pathfind( getenv( "PATH" ), (char*)pzProgPath, "rx" );
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if (pzPath == NULL)
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return AG_FALSE;
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}
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pz = strrchr( pzPath, DIRCH );
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/*
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* IF we cannot find a directory name separator,
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* THEN we do not have a path name to our executable file.
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*/
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if (pz == NULL)
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return AG_FALSE;
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pzName += skip;
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/*
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* Concatenate the file name to the end of the executable path.
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* The result may be either a file or a directory.
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*/
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if ((pz - pzPath)+1 + strlen(pzName) >= bufSize)
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return AG_FALSE;
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memcpy( pzBuf, pzPath, (size_t)((pz - pzPath)+1) );
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strcpy( pzBuf + (pz - pzPath) + 1, pzName );
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/*
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* If the "pzPath" path was gotten from "pathfind()", then it was
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* allocated and we need to deallocate it.
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*/
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if (pzPath != pzProgPath)
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free( (void*)pzPath );
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return AG_TRUE;
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}
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static ag_bool
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insertEnvVal(
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char* pzBuf,
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int bufSize,
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tCC* pzName,
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tCC* pzProgPath )
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{
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char* pzDir = pzBuf;
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for (;;) {
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int ch = (int)*++pzName;
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if (! ISNAMECHAR( ch ))
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break;
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*(pzDir++) = (char)ch;
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}
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if (pzDir == pzBuf)
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return AG_FALSE;
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*pzDir = NUL;
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pzDir = getenv( pzBuf );
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/*
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* Environment value not found -- skip the home list entry
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*/
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if (pzDir == NULL)
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return AG_FALSE;
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if (strlen( pzDir ) + 1 + strlen( pzName ) >= bufSize)
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return AG_FALSE;
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sprintf( pzBuf, "%s%s", pzDir, pzName );
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return AG_TRUE;
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}
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LOCAL void
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mungeString( char* pzTxt, tOptionLoadMode mode )
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{
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char* pzE;
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if (mode == OPTION_LOAD_KEEP)
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return;
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if (isspace( (int)*pzTxt )) {
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char* pzS = pzTxt;
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char* pzD = pzTxt;
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while (isspace( (int)*++pzS )) ;
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while ((*(pzD++) = *(pzS++)) != NUL) ;
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pzE = pzD-1;
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} else
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pzE = pzTxt + strlen( pzTxt );
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while ((pzE > pzTxt) && isspace( (int)pzE[-1] )) pzE--;
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*pzE = NUL;
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if (mode == OPTION_LOAD_UNCOOKED)
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return;
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switch (*pzTxt) {
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default: return;
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case '"':
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case '\'': break;
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}
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switch (pzE[-1]) {
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default: return;
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case '"':
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case '\'': break;
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}
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(void)ao_string_cook( pzTxt, NULL );
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}
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static char*
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assembleArgValue( char* pzTxt, tOptionLoadMode mode )
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{
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tSCC zBrk[] = " \t:=";
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char* pzEnd = strpbrk( pzTxt, zBrk );
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int space_break;
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/*
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* Not having an argument to a configurable name is okay.
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*/
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if (pzEnd == NULL)
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return pzTxt + strlen(pzTxt);
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/*
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* If we are keeping all whitespace, then the modevalue starts with the
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* character that follows the end of the configurable name, regardless
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* of which character caused it.
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*/
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if (mode == OPTION_LOAD_KEEP) {
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*(pzEnd++) = NUL;
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return pzEnd;
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}
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/*
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* If the name ended on a white space character, remember that
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* because we'll have to skip over an immediately following ':' or '='
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* (and the white space following *that*).
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*/
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|
|
space_break = isspace((int)*pzEnd);
|
||
|
|
*(pzEnd++) = NUL;
|
||
|
|
while (isspace((int)*pzEnd)) pzEnd++;
|
||
|
|
if (space_break && ((*pzEnd == ':') || (*pzEnd == '=')))
|
||
|
|
while (isspace((int)*++pzEnd)) ;
|
||
|
|
|
||
|
|
return pzEnd;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Load an option from a block of text. The text must start with the
|
||
|
|
* configurable/option name and be followed by its associated value.
|
||
|
|
* That value may be processed in any of several ways. See "tOptionLoadMode"
|
||
|
|
* in autoopts.h.
|
||
|
|
*/
|
||
|
|
LOCAL void
|
||
|
|
loadOptionLine(
|
||
|
|
tOptions* pOpts,
|
||
|
|
tOptState* pOS,
|
||
|
|
char* pzLine,
|
||
|
|
tDirection direction,
|
||
|
|
tOptionLoadMode load_mode )
|
||
|
|
{
|
||
|
|
while (isspace( (int)*pzLine )) pzLine++;
|
||
|
|
|
||
|
|
{
|
||
|
|
char* pzArg = assembleArgValue( pzLine, load_mode );
|
||
|
|
|
||
|
|
if (! SUCCESSFUL( longOptionFind( pOpts, pzLine, pOS )))
|
||
|
|
return;
|
||
|
|
if (pOS->flags & OPTST_NO_INIT)
|
||
|
|
return;
|
||
|
|
pOS->pzOptArg = pzArg;
|
||
|
|
}
|
||
|
|
|
||
|
|
switch (pOS->flags & (OPTST_IMM|OPTST_DISABLE_IMM)) {
|
||
|
|
case 0:
|
||
|
|
/*
|
||
|
|
* The selected option has no immediate action.
|
||
|
|
* THEREFORE, if the direction is PRESETTING
|
||
|
|
* THEN we skip this option.
|
||
|
|
*/
|
||
|
|
if (PRESETTING(direction))
|
||
|
|
return;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case OPTST_IMM:
|
||
|
|
if (PRESETTING(direction)) {
|
||
|
|
/*
|
||
|
|
* We are in the presetting direction with an option we handle
|
||
|
|
* immediately for enablement, but normally for disablement.
|
||
|
|
* Therefore, skip if disabled.
|
||
|
|
*/
|
||
|
|
if ((pOS->flags & OPTST_DISABLED) == 0)
|
||
|
|
return;
|
||
|
|
} else {
|
||
|
|
/*
|
||
|
|
* We are in the processing direction with an option we handle
|
||
|
|
* immediately for enablement, but normally for disablement.
|
||
|
|
* Therefore, skip if NOT disabled.
|
||
|
|
*/
|
||
|
|
if ((pOS->flags & OPTST_DISABLED) != 0)
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case OPTST_DISABLE_IMM:
|
||
|
|
if (PRESETTING(direction)) {
|
||
|
|
/*
|
||
|
|
* We are in the presetting direction with an option we handle
|
||
|
|
* immediately for disablement, but normally for disablement.
|
||
|
|
* Therefore, skip if NOT disabled.
|
||
|
|
*/
|
||
|
|
if ((pOS->flags & OPTST_DISABLED) != 0)
|
||
|
|
return;
|
||
|
|
} else {
|
||
|
|
/*
|
||
|
|
* We are in the processing direction with an option we handle
|
||
|
|
* immediately for disablement, but normally for disablement.
|
||
|
|
* Therefore, skip if disabled.
|
||
|
|
*/
|
||
|
|
if ((pOS->flags & OPTST_DISABLED) == 0)
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case OPTST_IMM|OPTST_DISABLE_IMM:
|
||
|
|
/*
|
||
|
|
* The selected option is always for immediate action.
|
||
|
|
* THEREFORE, if the direction is PROCESSING
|
||
|
|
* THEN we skip this option.
|
||
|
|
*/
|
||
|
|
if (PROCESSING(direction))
|
||
|
|
return;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Fix up the args.
|
||
|
|
*/
|
||
|
|
if (OPTST_GET_ARGTYPE(pOS->pOD->fOptState) == OPARG_TYPE_NONE) {
|
||
|
|
if (*pOS->pzOptArg != NUL)
|
||
|
|
return;
|
||
|
|
pOS->pzOptArg = NULL;
|
||
|
|
|
||
|
|
} else if (pOS->pOD->fOptState & OPTST_ARG_OPTIONAL) {
|
||
|
|
if (*pOS->pzOptArg == NUL)
|
||
|
|
pOS->pzOptArg = NULL;
|
||
|
|
else {
|
||
|
|
AGDUPSTR( pOS->pzOptArg, pOS->pzOptArg, "option argument" );
|
||
|
|
pOS->flags |= OPTST_ALLOC_ARG;
|
||
|
|
}
|
||
|
|
|
||
|
|
} else {
|
||
|
|
if (*pOS->pzOptArg == NUL)
|
||
|
|
pOS->pzOptArg = zNil;
|
||
|
|
else {
|
||
|
|
AGDUPSTR( pOS->pzOptArg, pOS->pzOptArg, "option argument" );
|
||
|
|
pOS->flags |= OPTST_ALLOC_ARG;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
{
|
||
|
|
tOptionLoadMode sv = option_load_mode;
|
||
|
|
option_load_mode = load_mode;
|
||
|
|
handleOption( pOpts, pOS );
|
||
|
|
option_load_mode = sv;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*=export_func optionLoadLine
|
||
|
|
*
|
||
|
|
* what: process a string for an option name and value
|
||
|
|
*
|
||
|
|
* arg: tOptions*, pOpts, program options descriptor
|
||
|
|
* arg: char const*, pzLine, NUL-terminated text
|
||
|
|
*
|
||
|
|
* doc:
|
||
|
|
*
|
||
|
|
* This is a client program callable routine for setting options from, for
|
||
|
|
* example, the contents of a file that they read in. Only one option may
|
||
|
|
* appear in the text. It will be treated as a normal (non-preset) option.
|
||
|
|
*
|
||
|
|
* When passed a pointer to the option struct and a string, it will find
|
||
|
|
* the option named by the first token on the string and set the option
|
||
|
|
* argument to the remainder of the string. The caller must NUL terminate
|
||
|
|
* the string. Any embedded new lines will be included in the option
|
||
|
|
* argument. If the input looks like one or more quoted strings, then the
|
||
|
|
* input will be "cooked". The "cooking" is identical to the string
|
||
|
|
* formation used in AutoGen definition files (@pxref{basic expression}),
|
||
|
|
* except that you may not use backquotes.
|
||
|
|
*
|
||
|
|
* err: Invalid options are silently ignored. Invalid option arguments
|
||
|
|
* will cause a warning to print, but the function should return.
|
||
|
|
=*/
|
||
|
|
void
|
||
|
|
optionLoadLine(
|
||
|
|
tOptions* pOpts,
|
||
|
|
tCC* pzLine )
|
||
|
|
{
|
||
|
|
tOptState st = OPTSTATE_INITIALIZER(SET);
|
||
|
|
char* pz;
|
||
|
|
AGDUPSTR( pz, pzLine, "user option line" );
|
||
|
|
loadOptionLine( pOpts, &st, pz, DIRECTION_PROCESS, OPTION_LOAD_COOKED );
|
||
|
|
AGFREE( pz );
|
||
|
|
}
|
||
|
|
/*
|
||
|
|
* Local Variables:
|
||
|
|
* mode: C
|
||
|
|
* c-file-style: "stroustrup"
|
||
|
|
* indent-tabs-mode: nil
|
||
|
|
* End:
|
||
|
|
* end of autoopts/load.c */
|