common/SC_StringParser.cpp

   1 // Copyright (c) 2003-2006 stefan kersten
   2 //
   3 // This program is free software; you can redistribute it and/or
   4 // modify it under the terms of the GNU General Public License as
   5 // published by the Free Software Foundation; either version 2 of the
   6 // License, or (at your option) any later version.
   7 //
   8 // This program is distributed in the hope that it will be useful, but
   9 // WITHOUT ANY WARRANTY; without even the implied warranty of
  10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11 // General Public License for more details.
  12 //
  13 // You should have received a copy of the GNU General Public License
  14 // along with this program; if not, write to the Free Software
  15 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
  16 // USA
  17
  18 #include "SC_StringParser.h"
  19 #include "SC_BoundsMacros.h"
  20 #include <string.h>
  21 #include <stdlib.h>
  22
  23 SC_StringParser::SC_StringParser()
  24         : mSpec(0), mStart(0), mEnd(0), mSep(0)
  25 {
  26 }
  27
  28 SC_StringParser::SC_StringParser(const char *spec, char sep)
  29         : mSpec(spec), mStart(0), mEnd(0), mSep(sep)
  30 {
  31         if (mSpec) {
  32                 size_t len = strlen(mSpec);
  33                 if (len > 0) {
  34                         mStart = mSpec;
  35                         mEnd = mStart + len;
  36                 } else {
  37                         mSpec = 0;
  38                 }
  39         }
  40 }
  41
  42 bool SC_StringParser::AtEnd() const
  43 {
  44         return mSpec == 0;
  45 }
  46
  47 const char *SC_StringParser::NextToken()
  48 {
  49         if (mSpec) {
  50                 const char *end = strchr(mStart, mSep);
  51                 if (end == 0) {
  52                         end = mEnd;
  53                 }
  54
  55                 size_t len = sc_min(SC_MAX_TOKEN_LENGTH-1, end-mStart);
  56                 memcpy(mBuf, mStart, len);
  57                 mBuf[len] = '\0';
  58
  59                 if (end == mEnd) {
  60                         mSpec = 0;
  61                 } else {
  62                         mStart = end+1;
  63                 }
  64
  65                 return mBuf;
  66         }
  67
  68         return 0;
  69 }
  70
  71 // EOF