707 lines
19 KiB
C
707 lines
19 KiB
C
/* $NetBSD: nested.c,v 1.1.1.1 2007/01/06 16:06:10 kardel Exp $ */
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/*
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* Id: nested.c,v 4.8 2006/09/28 01:26:33 bkorb Exp
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* Time-stamp: "2006-09-24 15:27:32 bkorb"
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*
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* Automated Options Nested Values module.
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*/
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/*
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* Automated Options copyright 1992-2006 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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/* = = = START-STATIC-FORWARD = = = */
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/* static forward declarations maintained by :mkfwd */
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static void
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removeBackslashes( char* pzSrc );
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static char const*
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scanQuotedString( char const* pzTxt );
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static tOptionValue*
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addStringValue( void** pp, char const* pzName, size_t nameLen,
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char const* pzValue, size_t dataLen );
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static tOptionValue*
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addBoolValue( void** pp, char const* pzName, size_t nameLen,
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char const* pzValue, size_t dataLen );
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static tOptionValue*
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addNumberValue( void** pp, char const* pzName, size_t nameLen,
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char const* pzValue, size_t dataLen );
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static tOptionValue*
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addNestedValue( void** pp, char const* pzName, size_t nameLen,
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char* pzValue, size_t dataLen, tOptionLoadMode mode );
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static char const*
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scanNameEntry( char const* pzName, tOptionValue* pRes, tOptionLoadMode mode );
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static char const*
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scanXmlEntry( char const* pzName, tOptionValue* pRes, tOptionLoadMode mode );
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static void
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unloadNestedArglist( tArgList* pAL );
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static void
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sortNestedList( tArgList* pAL );
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/* = = = END-STATIC-FORWARD = = = */
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/* removeBackslashes
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*
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* This function assumes that all newline characters were preceeded by
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* backslashes that need removal.
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*/
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static void
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removeBackslashes( char* pzSrc )
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{
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char* pzD = strchr(pzSrc, '\n');
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if (pzD == NULL)
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return;
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*--pzD = '\n';
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for (;;) {
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char ch = ((*pzD++) = *(pzSrc++));
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switch (ch) {
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case '\n': *--pzD = ch; break;
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case NUL: return;
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default:
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;
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}
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}
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}
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/* scanQuotedString
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*
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* Find the end of a quoted string, skipping escaped quote characters.
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*/
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static char const*
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scanQuotedString( char const* pzTxt )
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{
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char q = *(pzTxt++); /* remember the type of quote */
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for (;;) {
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char ch = *(pzTxt++);
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if (ch == NUL)
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return pzTxt-1;
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if (ch == q)
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return pzTxt;
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if (ch == '\\') {
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ch = *(pzTxt++);
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/*
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* IF the next character is NUL, drop the backslash, too.
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*/
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if (ch == NUL)
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return pzTxt - 2;
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/*
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* IF the quote character or the escape character were escaped,
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* then skip both, as long as the string does not end.
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*/
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if ((ch == q) || (ch == '\\')) {
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if (*(pzTxt++) == NUL)
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return pzTxt-1;
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}
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}
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}
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}
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/* addStringValue
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*
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* Associate a name with either a string or no value.
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*/
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static tOptionValue*
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addStringValue( void** pp, char const* pzName, size_t nameLen,
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char const* pzValue, size_t dataLen )
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{
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tOptionValue* pNV;
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size_t sz = nameLen + dataLen + sizeof(*pNV);
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pNV = AGALOC( sz, "option name/str value pair" );
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if (pNV == NULL)
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return NULL;
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if (pzValue == NULL) {
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pNV->valType = OPARG_TYPE_NONE;
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pNV->pzName = pNV->v.strVal;
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} else {
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pNV->valType = OPARG_TYPE_STRING;
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if (dataLen > 0)
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memcpy( pNV->v.strVal, pzValue, dataLen );
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pNV->v.strVal[dataLen] = NUL;
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pNV->pzName = pNV->v.strVal + dataLen + 1;
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}
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memcpy( pNV->pzName, pzName, nameLen );
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pNV->pzName[ nameLen ] = NUL;
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addArgListEntry( pp, pNV );
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return pNV;
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}
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/* addBoolValue
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*
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* Associate a name with either a string or no value.
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*/
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static tOptionValue*
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addBoolValue( void** pp, char const* pzName, size_t nameLen,
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char const* pzValue, size_t dataLen )
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{
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tOptionValue* pNV;
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size_t sz = nameLen + sizeof(*pNV) + 1;
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pNV = AGALOC( sz, "option name/bool value pair" );
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if (pNV == NULL)
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return NULL;
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while (isspace( (int)*pzValue ) && (dataLen > 0)) {
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dataLen--; pzValue++;
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}
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if (dataLen == 0)
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pNV->v.boolVal = 0;
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else if (isdigit( (int)*pzValue ))
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pNV->v.boolVal = atoi( pzValue );
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else switch (*pzValue) {
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case 'f':
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case 'F':
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case 'n':
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case 'N':
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pNV->v.boolVal = 0; break;
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default:
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pNV->v.boolVal = 1;
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}
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pNV->valType = OPARG_TYPE_BOOLEAN;
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pNV->pzName = (char*)(pNV + 1);
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memcpy( pNV->pzName, pzName, nameLen );
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pNV->pzName[ nameLen ] = NUL;
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addArgListEntry( pp, pNV );
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return pNV;
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}
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/* addNumberValue
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*
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* Associate a name with either a string or no value.
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*/
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static tOptionValue*
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addNumberValue( void** pp, char const* pzName, size_t nameLen,
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char const* pzValue, size_t dataLen )
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{
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tOptionValue* pNV;
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size_t sz = nameLen + sizeof(*pNV) + 1;
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pNV = AGALOC( sz, "option name/bool value pair" );
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if (pNV == NULL)
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return NULL;
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while (isspace( (int)*pzValue ) && (dataLen > 0)) {
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dataLen--; pzValue++;
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}
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if (dataLen == 0)
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pNV->v.boolVal = 0;
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else
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pNV->v.boolVal = atoi( pzValue );
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pNV->valType = OPARG_TYPE_NUMERIC;
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pNV->pzName = (char*)(pNV + 1);
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memcpy( pNV->pzName, pzName, nameLen );
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pNV->pzName[ nameLen ] = NUL;
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addArgListEntry( pp, pNV );
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return pNV;
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}
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/* addNestedValue
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*
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* Associate a name with either a string or no value.
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*/
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static tOptionValue*
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addNestedValue( void** pp, char const* pzName, size_t nameLen,
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char* pzValue, size_t dataLen, tOptionLoadMode mode )
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{
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tOptionValue* pNV;
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if (dataLen == 0) {
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size_t sz = nameLen + sizeof(*pNV) + 1;
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pNV = AGALOC( sz, "empty nested value pair" );
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if (pNV == NULL)
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return NULL;
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pNV->v.nestVal = NULL;
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pNV->valType = OPARG_TYPE_HIERARCHY;
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pNV->pzName = (char*)(pNV + 1);
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memcpy( pNV->pzName, pzName, nameLen );
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pNV->pzName[ nameLen ] = NUL;
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} else {
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pNV = optionLoadNested( pzValue, pzName, nameLen, mode );
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}
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if (pNV != NULL)
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addArgListEntry( pp, pNV );
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return pNV;
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}
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/* scanNameEntry
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*
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* We have an entry that starts with a name. Find the end of it, cook it
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* (if called for) and create the name/value association.
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*/
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static char const*
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scanNameEntry( char const* pzName, tOptionValue* pRes, tOptionLoadMode mode )
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{
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tOptionValue* pNV;
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char const* pzScan = pzName+1;
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char const* pzVal;
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size_t nameLen = 1;
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size_t dataLen = 0;
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while (ISNAMECHAR( (int)*pzScan )) { pzScan++; nameLen++; }
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while (isspace( (int)*pzScan )) {
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char ch = *(pzScan++);
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if ((ch == '\n') || (ch == ',')) {
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addStringValue( &(pRes->v.nestVal), pzName, nameLen, NULL, 0 );
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return pzScan - 1;
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}
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}
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switch (*pzScan) {
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case '=':
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case ':':
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while (isspace( (int)*++pzScan )) ;
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switch (*pzScan) {
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case ',': goto comma_char;
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case '"':
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case '\'': goto quote_char;
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case NUL: addStringValue( &(pRes->v.nestVal), pzName, nameLen, NULL, 0);
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goto leave_scan_name;
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default: goto default_char;
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}
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case ',':
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comma_char:
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pzScan++;
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/* FALLTHROUGH */
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case NUL:
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addStringValue( &(pRes->v.nestVal), pzName, nameLen, NULL, 0 );
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break;
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case '"':
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case '\'':
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quote_char:
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pzVal = pzScan;
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pzScan = scanQuotedString( pzScan );
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dataLen = pzScan - pzVal;
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pNV = addStringValue( &(pRes->v.nestVal), pzName, nameLen,
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pzVal, dataLen );
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if ((pNV != NULL) && (mode == OPTION_LOAD_COOKED))
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ao_string_cook( pNV->v.strVal, NULL );
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break;
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default:
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default_char:
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/*
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* We have found some strange text value. It ends with a newline
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* or a comma.
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*/
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pzVal = pzScan;
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for (;;) {
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char ch = *(pzScan++);
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switch (ch) {
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case '\n':
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if ((pzScan > pzVal + 2) && (pzScan[-2] == '\\'))
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continue;
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/* FALLTHROUGH */
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case ',':
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dataLen = (pzScan - pzVal) - 1;
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pNV = addStringValue( &(pRes->v.nestVal), pzName, nameLen,
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pzVal, dataLen );
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if (pNV != NULL)
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removeBackslashes( pNV->v.strVal );
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goto leave_scan_name;
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}
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}
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break;
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} leave_scan_name:;
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return pzScan;
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}
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/* scanXmlEntry
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*
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* We've found a '<' character. We ignore this if it is a comment or a
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* directive. If it is something else, then whatever it is we are looking
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* at is bogus. Returning NULL stops processing.
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*/
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static char const*
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scanXmlEntry( char const* pzName, tOptionValue* pRes, tOptionLoadMode mode )
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{
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size_t nameLen = 1, valLen = 0;
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char const* pzScan = ++pzName;
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char const* pzVal;
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tOptionValue valu;
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tOptionValue* pNewVal;
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if (! isalpha((int)*pzName)) {
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switch (*pzName) {
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default:
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pzName = NULL;
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break;
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case '!':
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pzName = strstr( pzName, "-->" );
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if (pzName != NULL)
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pzName += 3;
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break;
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case '?':
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pzName = strchr( pzName, '>' );
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if (pzName != NULL)
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pzName++;
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break;
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}
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return pzName;
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}
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while (isalpha( (int)*++pzScan )) nameLen++;
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if (nameLen > 64)
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return NULL;
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valu.valType = OPARG_TYPE_STRING;
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switch (*pzScan) {
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case ' ':
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case '\t':
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pzScan = parseAttributes( NULL, (char*)pzScan, &mode, &valu );
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if (*pzScan == '>') {
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pzScan++;
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break;
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}
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if (*pzScan != '/')
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return NULL;
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/* FALLTHROUGH */
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case '/':
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if (*++pzScan != '>')
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return NULL;
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addStringValue( &(pRes->v.nestVal), pzName, nameLen, NULL, 0 );
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return pzScan+2;
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default: return NULL;
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case '>': break;
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}
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pzVal = pzScan;
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{
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char z[68];
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char* pzD = z;
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int ct = nameLen;
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char const* pzS = pzName;
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*(pzD++) = '<';
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*(pzD++) = '/';
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do {
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*(pzD++) = *(pzS++);
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} while (--ct > 0);
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*(pzD++) = '>';
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*pzD = NUL;
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pzScan = strstr( pzScan, z );
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if (pzScan == NULL)
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return NULL;
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valLen = (pzScan - pzVal);
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pzScan += nameLen + 3;
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while (isspace( (int)*pzScan )) pzScan++;
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}
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switch (valu.valType) {
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case OPARG_TYPE_NONE:
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addStringValue( &(pRes->v.nestVal), pzName, nameLen, NULL, 0 );
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break;
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case OPARG_TYPE_STRING:
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pNewVal =
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addStringValue( &(pRes->v.nestVal), pzName, nameLen, pzVal, valLen );
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if (mode == OPTION_LOAD_KEEP)
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break;
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mungeString( pNewVal->v.strVal, mode );
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break;
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case OPARG_TYPE_BOOLEAN:
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addBoolValue( &(pRes->v.nestVal), pzName, nameLen, pzVal, valLen );
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break;
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case OPARG_TYPE_NUMERIC:
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addNumberValue( &(pRes->v.nestVal), pzName, nameLen, pzVal, valLen );
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break;
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case OPARG_TYPE_HIERARCHY:
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{
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char* pz = AGALOC( valLen+1, "hierarchical scan" );
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if (pz == NULL)
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break;
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memcpy( pz, pzVal, valLen );
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pz[valLen] = NUL;
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addNestedValue( &(pRes->v.nestVal), pzName, nameLen, pz, valLen, mode );
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free(pz);
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break;
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}
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case OPARG_TYPE_ENUMERATION:
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case OPARG_TYPE_MEMBERSHIP:
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default:
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break;
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}
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return pzScan;
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}
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static void
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unloadNestedArglist( tArgList* pAL )
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{
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int ct = pAL->useCt;
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tCC** ppNV = pAL->apzArgs;
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while (ct-- > 0) {
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tOptionValue* pNV = (tOptionValue*)(void*)*(ppNV++);
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if (pNV->valType == OPARG_TYPE_HIERARCHY)
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unloadNestedArglist( pNV->v.nestVal );
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free( pNV );
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}
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free( (void*)pAL );
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}
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/*=export_func optionUnloadNested
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*
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* what: Deallocate the memory for a nested value
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* arg: + const tOptionValue* + pOptVal + the hierarchical value +
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*
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* doc:
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* A nested value needs to be deallocated. The pointer passed in should
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* have been gotten from a call to @code{configFileLoad()} (See
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* @pxref{libopts-configFileLoad}).
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=*/
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void
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|
optionUnloadNested( const tOptionValue* pOV )
|
|
{
|
|
if (pOV == NULL) return;
|
|
if (pOV->valType != OPARG_TYPE_HIERARCHY) {
|
|
errno = EINVAL;
|
|
return;
|
|
}
|
|
|
|
unloadNestedArglist( pOV->v.nestVal );
|
|
|
|
free( (void*)pOV );
|
|
}
|
|
|
|
|
|
/* sortNestedList
|
|
*
|
|
* This is a _stable_ sort. The entries are sorted alphabetically,
|
|
* but within entries of the same name the ordering is unchanged.
|
|
* Typically, we also hope the input is sorted.
|
|
*/
|
|
static void
|
|
sortNestedList( tArgList* pAL )
|
|
{
|
|
int ix;
|
|
int lm = pAL->useCt;
|
|
|
|
/*
|
|
* This loop iterates "useCt" - 1 times.
|
|
*/
|
|
for (ix = 0; ++ix < lm;) {
|
|
int iy = ix-1;
|
|
tOptionValue* pNewNV = (tOptionValue*)(void*)(pAL->apzArgs[ix]);
|
|
tOptionValue* pOldNV = (tOptionValue*)(void*)(pAL->apzArgs[iy]);
|
|
|
|
/*
|
|
* For as long as the new entry precedes the "old" entry,
|
|
* move the old pointer. Stop before trying to extract the
|
|
* "-1" entry.
|
|
*/
|
|
while (strcmp( pOldNV->pzName, pNewNV->pzName ) > 0) {
|
|
pAL->apzArgs[iy+1] = (void*)pOldNV;
|
|
pOldNV = (tOptionValue*)(void*)(pAL->apzArgs[--iy]);
|
|
if (iy < 0)
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Always store the pointer. Sometimes it is redundant,
|
|
* but the redundancy is cheaper than a test and branch sequence.
|
|
*/
|
|
pAL->apzArgs[iy+1] = (void*)pNewNV;
|
|
}
|
|
}
|
|
|
|
|
|
/*=export_func optionLoadNested
|
|
* private:
|
|
*
|
|
* what: parse a hierarchical option argument
|
|
* arg: + char const* + pzTxt + the text to scan +
|
|
* arg: + char const* + pzName + the name for the text +
|
|
* arg: + size_t + nameLen + the length of "name" +
|
|
* arg: + tOptionLoadMode + mode + the value formation mode +
|
|
*
|
|
* ret_type: tOptionValue*
|
|
* ret_desc: An allocated, compound value structure
|
|
*
|
|
* doc:
|
|
* A block of text represents a series of values. It may be an
|
|
* entire configuration file, or it may be an argument to an
|
|
* option that takes a hierarchical value.
|
|
=*/
|
|
tOptionValue*
|
|
optionLoadNested( char const* pzTxt, char const* pzName, size_t nameLen,
|
|
tOptionLoadMode mode )
|
|
{
|
|
tOptionValue* pRes;
|
|
tArgList* pAL;
|
|
|
|
/*
|
|
* Make sure we have some data and we have space to put what we find.
|
|
*/
|
|
if (pzTxt == NULL) {
|
|
errno = EINVAL;
|
|
return NULL;
|
|
}
|
|
while (isspace( (int)*pzTxt )) pzTxt++;
|
|
if (*pzTxt == NUL) {
|
|
errno = ENOENT;
|
|
return NULL;
|
|
}
|
|
pRes = AGALOC( sizeof(*pRes) + nameLen + 1, "nested args" );
|
|
if (pRes == NULL) {
|
|
errno = ENOMEM;
|
|
return NULL;
|
|
}
|
|
pRes->valType = OPARG_TYPE_HIERARCHY;
|
|
pRes->pzName = (char*)(pRes + 1);
|
|
memcpy( pRes->pzName, pzName, nameLen );
|
|
pRes->pzName[ nameLen ] = NUL;
|
|
|
|
pAL = AGALOC( sizeof(*pAL), "nested arg list" );
|
|
if (pAL == NULL) {
|
|
free( pRes );
|
|
return NULL;
|
|
}
|
|
pRes->v.nestVal = pAL;
|
|
pAL->useCt = 0;
|
|
pAL->allocCt = MIN_ARG_ALLOC_CT;
|
|
|
|
/*
|
|
* Scan until we hit a NUL.
|
|
*/
|
|
do {
|
|
while (isspace( (int)*pzTxt )) pzTxt++;
|
|
if (isalpha( (int)*pzTxt )) {
|
|
pzTxt = scanNameEntry( pzTxt, pRes, mode );
|
|
}
|
|
else switch (*pzTxt) {
|
|
case NUL: goto scan_done;
|
|
case '<': pzTxt = scanXmlEntry( pzTxt, pRes, mode );
|
|
if (*pzTxt == ',') pzTxt++; break;
|
|
case '#': pzTxt = strchr( pzTxt, '\n' ); break;
|
|
default: goto woops;
|
|
}
|
|
} while (pzTxt != NULL); scan_done:;
|
|
|
|
pAL = pRes->v.nestVal;
|
|
if (pAL->useCt != 0) {
|
|
sortNestedList( pAL );
|
|
return pRes;
|
|
}
|
|
|
|
woops:
|
|
free( pRes->v.nestVal );
|
|
free( pRes );
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/*=export_func optionNestedVal
|
|
* private:
|
|
*
|
|
* what: parse a hierarchical option argument
|
|
* arg: + tOptions* + pOpts + program options descriptor +
|
|
* arg: + tOptDesc* + pOptDesc + the descriptor for this arg +
|
|
*
|
|
* doc:
|
|
* Nested value was found on the command line
|
|
=*/
|
|
void
|
|
optionNestedVal( tOptions* pOpts, tOptDesc* pOD )
|
|
{
|
|
tOptionValue* pOV =
|
|
optionLoadNested(pOD->optArg.argString, pOD->pz_Name,
|
|
strlen(pOD->pz_Name), OPTION_LOAD_UNCOOKED);
|
|
|
|
if (pOV != NULL)
|
|
addArgListEntry( &(pOD->optCookie), (void*)pOV );
|
|
}
|
|
/*
|
|
* Local Variables:
|
|
* mode: C
|
|
* c-file-style: "stroustrup"
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
* end of autoopts/nested.c */
|