EST_TNamedEnum.cc

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 /*                 Author: Richard Caley (rjc@cstr.ed.ac.uk)            */
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 /* A template class which allows names (const char *s) to be            */
 /* associated with enums, providing conversion.                         */
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#include <cstdlib>
#include <iostream>
#include <cstdio>
#include "EST_walloc.h"
#include "EST_TNamedEnum.h"

// This only takes a void * because I can't manage to get the
// parameter declaration in the definition past gcc with the actual type.

template<class ENUM, class VAL, class INFO> 
void EST_TValuedEnumI<ENUM,VAL,INFO>::initialise(const void *vdefs)
{
  int n=0;
  typedef EST_TValuedEnumDefinition<ENUM,VAL,INFO> defn;
  const defn *defs = (const defn *)vdefs;

  for(n=1; defs[n].token != defs[0].token; n++)
    ;

  this->ndefinitions = n;
  this->definitions = new defn[n];

  this->definitions[0] = defs[0];
  for(n=1; defs[n].token != defs[0].token; n++)
    this->definitions[n] = defs[n];

  this->p_unknown_enum = defs[n].token;
  this->p_unknown_value = defs[n].values[0];
}

template<class ENUM, class VAL, class INFO> 
void EST_TValuedEnumI<ENUM,VAL,INFO>::initialise(const void *vdefs, ENUM (*conv)(const char *))
{
  int n=0;
  //  const struct EST_TValuedEnumDefinition<const char *,VAL,INFO> *defs = (const struct EST_TValuedEnumDefinition<const char *,VAL,INFO> *)vdefs;

  typedef EST_TValuedEnumDefinition<const char *,VAL,INFO> _EST_TMPNAME;
  const _EST_TMPNAME *defs = (const _EST_TMPNAME *)vdefs;

  // fprintf(stderr, "start setup\n");

  for(n=1; strcmp(defs[n].token, defs[0].token) != 0; n++)
    {
      //const char *a = defs[0].token;
      //      const char *b = defs[n].token;
      // fprintf(stderr, ": %d '%s' '%s'\n", n, defs[n].token, defs[0].token);
    }

  this->ndefinitions = n;
  typedef EST_TValuedEnumDefinition<ENUM,VAL,INFO> defn;
  this->definitions = new defn[n];

  this->definitions[0].token = conv(defs[0].token);  
  for(int i=0; i<NAMED_ENUM_MAX_SYNONYMS; i++)
    this->definitions[0].values[i] = defs[0].values[i];
  this->definitions[0].info = defs[0].info;
  for(n=1; strcmp(defs[n].token, defs[0].token) != 0; n++)
    {
      this->definitions[n].token = conv(defs[n].token);
      for(int i2=0; i2<NAMED_ENUM_MAX_SYNONYMS; i2++)
    this->definitions[n].values[i2] = defs[n].values[i2];
      this->definitions[n].info = defs[n].info;
    }

  this->p_unknown_enum = conv(defs[n].token);
  this->p_unknown_value = defs[n].values[0];
}

template<class ENUM, class VAL, class INFO>
EST_TValuedEnumI<ENUM,VAL,INFO>::~EST_TValuedEnumI(void)
{
  if (this->definitions)
     delete[] this->definitions;
}

template<class ENUM, class VAL, class INFO> 
int EST_TValuedEnumI<ENUM,VAL,INFO>::n(void) const
{ 
return this->ndefinitions; 
}

template<class ENUM, class VAL, class INFO>
VAL EST_TValuedEnumI<ENUM,VAL,INFO>::value (ENUM token, int n) const
{
  int i;

  for(i=0; i<this->ndefinitions; i++)
    if (this->definitions[i].token == token)
      return this->definitions[i].values[n];

  return this->p_unknown_value;
}

template<class ENUM, class VAL, class INFO>
INFO &EST_TValuedEnumI<ENUM,VAL,INFO>::info (ENUM token) const
{
  int i;

  for(i=0; i<this->ndefinitions; i++)
    if (this->definitions[i].token == token)
      return this->definitions[i].info;

  std::cerr << "Fetching info for invalid entry" << std::endl;
  abort();

  static INFO dummyI;
  return dummyI;
}

template<class ENUM, class VAL, class INFO>
ENUM EST_TValuedEnumI<ENUM,VAL,INFO>::nth_token (int n) const
{
  if (n>=0 && n < this->ndefinitions)
    return this->definitions[n].token;

  return this->p_unknown_enum;
}

template<class ENUM, class VAL, class INFO> 
ENUM EST_TValuedEnumI<ENUM,VAL,INFO>::token (VAL value) const
{
    int i,j;

    for(i=0; i<this->ndefinitions; i++)
    for(j=0; j<NAMED_ENUM_MAX_SYNONYMS && this->definitions[i].values[j] ; j++)
        if (eq_vals(this->definitions[i].values[j], value))
        return this->definitions[i].token;

    return this->p_unknown_enum;
}

template<class ENUM> 
EST_read_status EST_TNamedEnum<ENUM>::priv_load(EST_String name, EST_TNamedEnum<ENUM> *definitive)
{
  typedef EST_TValuedEnumDefinition<ENUM, const char *, NO_INFO> Defn;
#define LINE_LENGTH (1024)
  EST_String line(NULL, 'x', LINE_LENGTH);
  char *buffer = (char *)line;
  EST_String tokens[NAMED_ENUM_MAX_SYNONYMS+2];
  FILE *file;
  char quote = '\0';
  int have_unknown=0;
  int n=0;

  if ((file=fopen(name, "rb"))==NULL)
    return misc_read_error;

  if (this->definitions)
    delete[] this->definitions;

  this->ndefinitions= -1;
  this->definitions=NULL;

  buffer[LINE_LENGTH-1] = 'x';

  while (fgets(buffer, LINE_LENGTH, file))
    {
      if ( buffer[LINE_LENGTH-1] != 'x')
    {
      std::cerr << "line too long .. '" << buffer << "'\n";
      return wrong_format;
    }

      if (this->ndefinitions>=0 && quote != '\0' && buffer[0] == '=')
    {
      // definition by number

      if ( n>= this->ndefinitions)
        {
          std::cerr << "too many definitions\n";
          return wrong_format;
        }

      int ntokens = split(line, tokens, NAMED_ENUM_MAX_SYNONYMS+2, RXwhite, '"');
      this->definitions[n].token = (ENUM)atoi(tokens[0].after(0,1));

      for(int i=1; i<ntokens; i++)
          this->definitions[n].values[i-1] = wstrdup(tokens[i].unquote_if_needed(quote));
      for(int j=ntokens-1 ; j< NAMED_ENUM_MAX_SYNONYMS; j++)
        this->definitions[n].values[j]=NULL;

      n++;
    }
      else if (have_unknown && this->ndefinitions>=0 && quote != '\0' && buffer[0] == quote)
    {
      // definition by standard name
      if (!definitive)
        {
          std::cerr << "can't use names in this definition\n";
          return wrong_format;
        }
      if ( n>= this->ndefinitions)
        {
          std::cerr << "too many definitions\n";
          return wrong_format;
        }

      int ntokens = split(line, tokens, NAMED_ENUM_MAX_SYNONYMS+2, RXwhite, quote);

      this->definitions[n].token = definitive->token(tokens[0].unquote(quote));

      for(int i=1; i<ntokens; i++)
        this->definitions[n].values[i-1] = wstrdup(tokens[i].unquote_if_needed(quote));
      for(int j=ntokens-1 ; j< NAMED_ENUM_MAX_SYNONYMS; j++)
        this->definitions[n].values[j]=NULL;

      n++;
    }
      else
    {
      // parameter

      size_t mlen;
      int eq = line.search("=", 1, mlen);

      if (eq <0)
        {
          std::cerr << "bad header line '" << line;
          return wrong_format;
        }

      EST_String key(line.before(eq));

      if (key == "quote")
        {
          quote = line[eq+1];
          // cout << "quote = '" << quote << "'\n";
        }
      else if (key == "number")
        {
          this->ndefinitions=atoi(line.after(eq,1));
          // cout << "n = '" << ndefinitions << "'\n";
          this->definitions = new Defn[this->ndefinitions];
          for(int i=0; i<this->ndefinitions; i++)
        this->definitions[i].values[0] =NULL;
          n=0;
        }
      else if (key == "unknown")
        {
          this->p_unknown_enum=(ENUM)atoi(line.after(eq,1));
          // cout << "unknown = '" << p_unknown_enum << "'\n";
          have_unknown=1;
        }
      else
        {
          std::cerr << "bad header line '" << line;
          return wrong_format;
        }
      
    }
    }


  fclose(file);

  return format_ok;
}

template<class ENUM> 
EST_write_status EST_TNamedEnum<ENUM>::priv_save(EST_String name, EST_TNamedEnum<ENUM> *definitive, char quote) const
{
  FILE *file;

  if ((file=fopen(name, "wb"))==NULL)
    return write_fail;

  fprintf(file, "unknown=%d\n", this->p_unknown_enum);
  fprintf(file, "quote=%c\n", quote);
  fprintf(file, "number=%d\n", this->ndefinitions);

  for(int i=0; i<this->ndefinitions; i++)
    if (this->definitions[i].values[0])
      {
    if (definitive)
      fprintf(file, "%s ", (const char *)EST_String(definitive->name(this->definitions[i].token)).quote(quote));
    else
      fprintf(file, "=%d ", (int)this->definitions[i].token);

    for(int j=0; j<NAMED_ENUM_MAX_SYNONYMS && this->definitions[i].values[j] != NULL; j++)
      fprintf(file, "%s ", (const char *) EST_String(this->definitions[i].values[j]).quote_if_needed(quote));
      
    fputc('\n', file);
      }

  fclose(file);

  return write_ok;
}