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Changeset 5014 in orxonox.OLD for orxonox/trunk/src/lib/util/ini_parser.cc


Ignore:
Timestamp:
Aug 14, 2005, 4:29:29 PM (19 years ago)
Author:
bensch
Message:

orxonox/trunk: implemented a new kind of ini-parser
this parser first reads the file, and then one can search through without accessing the file anymore

File:
1 edited

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  • orxonox/trunk/src/lib/util/ini_parser.cc

    r4836 r5014  
    1010
    1111   ### File Specific:
    12    main-programmer: Christian Meyer
    13    co-programmer: ...
     12   main-programmer: Benjamin Grauer
     13   co-programmer: Christian Meyer
     14
     15   2005-08-14: complete reimplementation:
     16               now the File is parsed at the initialisation,
     17               and informations is gathered there.
    1418*/
    1519
    1620
    1721#include "ini_parser.h"
     22
     23#include "list.h"
     24#include "stdlibincl.h"
    1825
    1926#include "resource_manager.h"
    … …  
    2633 * @param filename: the path and name of the file to parse
    2734*/
    28 IniParser::IniParser (const char* filename)
     35IniParser::IniParser (const char* fileName)
    2936{
    3037  this->setClassID(CL_INI_PARSER, "IniParser");
    31 
    32   stream = NULL;
    33   bInSection = false;
    34   this->openFile(filename);
     38  this->setName(fileName);
     39
     40  this->currentEntry = NULL;
     41  this->currentSection = NULL;
     42  this->sections = NULL;
     43  if (fileName != NULL)
     44    this->openFile(fileName);
    3545}
    3646
    … …  
    4050IniParser::~IniParser ()
    4151{
    42   if( stream != NULL) fclose (stream);
    43 }
    44 
    45 /**
    46  *  opens another file to parse
     52  deleteSections();
     53}
     54
     55void IniParser::deleteSections()
     56{
     57  if (this->sections)
     58  {
     59    tIterator<IniSection>* sectionIt = this->sections->getIterator();
     60    IniSection* sectionEnum = sectionIt->nextElement();
     61    while (sectionEnum)
     62    {
     63      tIterator<IniEntry>* entryIt = sectionEnum->entries->getIterator();
     64      IniEntry* entryEnum = entryIt->nextElement();
     65      while (entryEnum)
     66      {
     67        delete []entryEnum->name;
     68        delete []entryEnum->value;
     69        delete entryEnum;
     70        entryEnum = entryIt->nextElement();
     71      }
     72      delete entryIt;
     73
     74      delete []sectionEnum->name;
     75      delete sectionEnum->entries;
     76      delete sectionEnum;
     77      sectionEnum = sectionIt->nextElement();
     78    }
     79    delete sectionIt;
     80  }
     81  delete this->sections;
     82  this->sections = NULL;
     83}
     84
     85/**
     86 * opens another file to parse
    4787 * @param filename: path and name of the new file to parse
    48  * @return zero on success or -1 if an error occured;
    49 */
    50 int IniParser::openFile(const char* filename)
    51 {
     88 * @return true on success false otherwise;
     89*/
     90bool IniParser::openFile(const char* filename)
     91{
     92  FILE*    stream;           //!< The stream we use to read the file.
     93
     94
     95  if( filename == NULL)
     96    return false;
    5297  char* tmpName = ResourceManager::homeDirCheck(filename);
    53   if( filename == NULL) return -1;
    54   if( stream != NULL)   fclose (stream);
     98
     99  if (sections != NULL)
     100    deleteSections();
     101
    55102  if( (stream = fopen (tmpName, "r")) == NULL)
    56     {
    57       PRINTF(1)("IniParser could not open %s\n", filename);
    58       delete tmpName;
    59       return -1;
    60     }
    61   bInSection = false;
    62   delete tmpName;
    63   return 0;
     103  {
     104    PRINTF(1)("IniParser could not open %s\n", filename);
     105    delete tmpName;
     106    return false;
     107  }
     108  else
     109  {
     110    this->currentEntry = NULL;
     111    this->currentSection = NULL;
     112    this->sections = new tList<IniSection>;
     113
     114    /////////////////////////////
     115    // READING IN THE INI-FILE //
     116    /////////////////////////////
     117    char lineBuffer[PARSELINELENGHT];
     118    char buffer[PARSELINELENGHT];
     119    char* ptr;
     120
     121    rewind (stream);
     122    while( !feof( stream))
     123    {
     124      // get next line
     125      fgets (lineBuffer, PARSELINELENGHT, stream);
     126      // remove newline char, and \0-terminate
     127      if( (ptr = strchr( lineBuffer, '\n')) != NULL)
     128        *ptr = 0;
     129      // check for section identifyer
     130      if( sscanf (lineBuffer, "[%s", buffer) == 1)
     131      {
     132        if( (ptr = strchr( buffer, ']')) != NULL)
     133        {
     134          *ptr = 0;
     135          IniSection* newSection = new IniSection;
     136          newSection->name = new char[strlen(buffer)+1];
     137          strcpy(newSection->name, buffer);
     138          newSection->entries = new tList<IniEntry>;
     139          this->sections->add(newSection);
     140          this->currentSection = newSection;
     141        }
     142      }
     143      else if( (ptr = strchr( lineBuffer, '=')) != NULL)
     144      {
     145        if (currentSection == NULL)
     146        {
     147          PRINTF(2)("Not in a Section yet for %s\n", lineBuffer);
     148          continue;
     149        }
     150        if( ptr == lineBuffer)
     151          continue;
     152        IniEntry* newEntry = new IniEntry;
     153
     154        char* valueBegin = ptr+1;
     155        while ((*valueBegin == ' ' || *valueBegin == '\t') && valueBegin <= lineBuffer + strlen(lineBuffer))
     156          ++valueBegin;
     157        newEntry->value = new char[strlen(valueBegin)+1];
     158        strcpy(newEntry->value, valueBegin);
     159        char* nameEnd = ptr-1, *nameBegin = lineBuffer;
     160        while ((*nameBegin == ' ' || *nameBegin == '\t') && nameBegin < ptr)
     161          ++nameBegin;
     162        while ((*nameEnd == ' ' || *nameEnd == '\t' ) && nameEnd >= nameBegin)
     163          --nameEnd;
     164        nameEnd[1] = '\0';
     165        newEntry->name = new char[strlen (nameBegin)];
     166        strcpy(newEntry->name, nameBegin);
     167
     168        this->currentSection->entries->add(newEntry);
     169      }
     170
     171    }
     172  }
     173  fclose(stream);
     174  return true;
    64175}
    65176
    66177/**
    67178 *  set the parsing cursor to the specified section
    68  * @param section: the name of the section to set the cursor to
    69  * @return zero on success or -1 if the section could not be found
    70 */
    71 int IniParser::getSection( const char* section)
    72 {
    73   bInSection = false;
    74   if( stream == NULL) return -1;
    75 
    76   char linebuffer[PARSELINELENGHT];
    77   char secbuffer[PARSELINELENGHT];
    78   char* ptr;
    79 
    80   rewind (stream);
    81   while( !feof( stream))
    82     {
    83       // get next line
    84       fgets (linebuffer, PARSELINELENGHT, stream);
    85       // remove newline char
    86       if( (ptr = strchr( linebuffer, '\n')) != NULL) *ptr = 0;
    87       // check for section identifyer
    88       if( sscanf (linebuffer, "[%s", secbuffer) == 1)
    89         {
    90           if( (ptr = strchr( secbuffer, ']')) != NULL)
    91             {
    92               *ptr = 0;
    93               if( !strcmp( secbuffer, section))
    94                 {
    95                   bInSection = true;
    96                   return 0;
    97                 }
    98             }
    99         }
    100     }
    101   return -1;
     179 * @param sectionName: the name of the section to set the cursor to
     180 * @return true on success or false if the section could not be found
     181*/
     182bool IniParser::getSection( const char* sectionName)
     183{
     184  tIterator<IniSection>* sectionIt = this->sections->getIterator();
     185  IniSection* sectionEnum = sectionIt->nextElement();
     186  while (sectionEnum)
     187  {
     188    if (!strcmp(sectionEnum->name, sectionName))
     189    {
     190      this->currentSection = sectionEnum;
     191      delete sectionIt;
     192      return true;
     193    }
     194
     195    sectionEnum = sectionIt->nextElement();
     196  }
     197  delete sectionIt;
     198  return false;
     199}
     200
     201/**
     202 * searches the next section
     203 * @returns the name of the section if found, NULL otherwise
     204 */
     205const char* IniParser::nextSection()
     206{
     207  if (this->currentSection == NULL)
     208    return NULL;
     209  else
     210  {
     211    if (this->sections)
     212      this->currentSection = sections->nextElement(this->currentSection);
     213  }
     214  if (this->currentSection != NULL)
     215    return this->currentSection->name;
     216  else
     217    return NULL;
    102218}
    103219
    104220/**
    105221 *  gets the next VarName=VarValue pair from the parsing stream
    106  * @param name: a pointer to a buffer to store the name of the entry
    107  * @param value: a pointer to a buffer to store the value of the entry
    108  * @return zero if the buffers have been filled with data or -1 if there are no entries left in the current section
    109 */
    110 int IniParser::nextVar( const char* name, const char* value)
    111 {
    112   if( stream == NULL)
    113     {
    114       bInSection = false;
    115       return -1;
    116     }
    117   if( !bInSection) return -1;
    118 
    119   char linebuffer[PARSELINELENGHT];
    120   char* ptr;
    121 
    122   while( !feof( stream))
    123     {
    124       // get next line
    125       fgets (linebuffer, PARSELINELENGHT, stream);
    126       // remove newline char
    127       if( (ptr = strchr( linebuffer, '\n')) != NULL) *ptr = 0;
    128       if( linebuffer[0] == '[')
    129         {
    130           bInSection = false;
    131           return -1;
    132         }
    133       sscanf(linebuffer, "%s = %s", name, value);
    134       return 0;
    135       /*
    136         if( (ptr = strchr( tmpBuffer, '=')) != NULL)
    137         {
    138         if( ptr == linebuffer) continue;
    139         strcpy (value, &ptr[1]);
    140         strncpy (name, linebuffer, strlen (linebuffer) - strlen (value) - 1);
    141         printf ("%s, %s\n", value, name);
    142         return 0;
    143         }
    144       */
    145     }
    146   return -1;
     222 * @param name: a pointer to the Name of the next Var
     223 * @param value: a pointer to the Value of the next Var
     224 * @return true on success, false otherwise (in the latter case name and value will be NULL)
     225 */
     226bool IniParser::nextVar()
     227{
     228  if (this->currentSection == NULL)
     229    return false;
     230  if(this->currentEntry == this->currentSection->entries->lastElement())
     231  {
     232    this->currentEntry = NULL;
     233    return false;
     234  }
     235  if (this->currentEntry == NULL)
     236    this->currentEntry = this->currentSection->entries->firstElement();
     237  else
     238    this->currentEntry = this->currentSection->entries->nextElement(this->currentEntry);
     239
     240  if (this->currentEntry == NULL)
     241    return false;
     242  else
     243    return true;
    147244}
    148245
    149246/**
    150247 *  directly acesses an entry in a section
    151  * @param name: the name of the entry to find
    152  * @param section: the section where the entry is to be found
    153  * @param defvalue: what should be returned in case the entry cannot be found
     248 * @param entryName: the name of the entry to find
     249 * @param sectionName: the section where the entry is to be found
     250 * @param defaultValue: what should be returned in case the entry cannot be found
    154251 * @return a pointer to a buffer conatining the value of the specified entry. This buffer will contain the data specified in defvalue in case the entry wasn't found
    155252
    … …  
    157254   lead to unwanted behaviour.
    158255*/
    159 const char* IniParser::getVar(const char* name, const char* section, const char* defvalue = "")
    160 {
    161   strcpy (internbuf, defvalue);
    162   if( getSection (section) == -1) return internbuf;
    163 
    164   char namebuf[PARSELINELENGHT];
    165   char valuebuf[PARSELINELENGHT];
    166 
    167   while( nextVar (namebuf, valuebuf) != -1)
    168     {
    169       if( !strcmp (name, namebuf))
     256const char* IniParser::getVar(const char* entryName, const char* sectionName, const char* defaultValue) const
     257{
     258  if (this->sections)
     259  {
     260    tIterator<IniSection>* sectionIt = this->sections->getIterator();
     261    IniSection* sectionEnum = sectionIt->nextElement();
     262    while (sectionEnum)
     263    {
     264      if (!strcmp(sectionEnum->name, sectionName))
     265      {
     266        tIterator<IniEntry>* entryIt = sectionEnum->entries->getIterator();
     267        IniEntry* entryEnum = entryIt->nextElement();
     268        while (entryEnum)
    170269        {
    171           strcpy (internbuf, valuebuf);
    172           return internbuf;
     270          if (!strcmp(entryEnum->name, entryName))
     271          {
     272            delete entryIt;
     273            delete sectionIt;
     274            return entryEnum->value;
     275          }
     276          entryEnum = entryIt->nextElement();
    173277        }
    174     }
    175   return internbuf;
    176 }
     278         delete entryIt;
     279         PRINTF(2)("Entry %s in section %s not found.\n", entryName, sectionName);
     280         break;
     281      }
     282      sectionEnum = sectionIt->nextElement();
     283    }
     284    delete sectionIt;
     285    PRINTF(2)("Section %s that should be containing %s not found.\n", sectionName, entryName);
     286  }
     287  else
     288    PRINTF(1)("%s not opened\n", this->getName());
     289
     290  return defaultValue;
     291
     292}
     293
     294void IniParser::debug() const
     295{
     296  PRINTF(0)("Iniparser %s - debug\n", this->getName());
     297  if (this->sections)
     298  {
     299    tIterator<IniSection>* sectionIt = this->sections->getIterator();
     300    IniSection* sectionEnum = sectionIt->nextElement();
     301    while (sectionEnum)
     302    {
     303      PRINTF(0)(" [%s]\n", sectionEnum->name);
     304
     305      tIterator<IniEntry>* entryIt = sectionEnum->entries->getIterator();
     306      IniEntry* entryEnum = entryIt->nextElement();
     307      while (entryEnum)
     308      {
     309        PRINTF(0)("   :%s: -> '%s'\n", entryEnum->name, entryEnum->value);
     310
     311        entryEnum = entryIt->nextElement();
     312      }
     313      delete entryIt;
     314
     315      sectionEnum = sectionIt->nextElement();
     316    }
     317    delete sectionIt;
     318  }
     319  else
     320    PRINTF(1)("%s not opened\n", this->getName());
     321}
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