/*
Copyright (c) 2003, Dan Kranz and Arnold Rom
All rights reserved.

Redistribution and use in source and binary forms, with or
without modification, are permitted provided that the following
conditions are met:

    * Redistributions of source code must retain the above
      copyright notice, this list of conditions and the following
      disclaimer.

    * Redistributions in binary form must reproduce the above
      copyright notice, this list of conditions and the following
      disclaimer in the documentation and/or other materials
      provided with the distribution.

    * The names of its contributors may not be used to endorse or
      promote products derived from this software without specific
      prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <roots.h>


/* ############################################################################# */
/* BYTE ReadAndTranslateDirectory(Database* db)                                # */
/*                                                                             # */
/*      return 0 if directory was read and translated.                         # */
/*      return 1 otherwise.                                                    # */
/*                                                                             # */
/*      output: db structure will be initialized based on the directory values # */
/*                                                                             # */
/* ############################################################################# */


/*      local macros */

#define BYTE_WIDTH    0
#define DATA_TYPE     1
#define FIELD_NAME    2
#define DISPLAY_WIDTH 3

#define InvalidLine                                                    \
        {RootsError("Invalid directory line: %.*s\n",buf.cpl,          \
                                               BlockPointer(buf,i+1)); \
                                                      return 1;}

BYTE ReadAndTranslateDirectory(DataBase* db)

/* ---------------------------------------------------------------------------- */
{       /* ReadAndTranslateDirectory  START */
/* ---------------------------------------------------------------------------- */

/*      local data */

        BlockCplNline buf;

        char fspec[MAX_PATH],park[MAXLAB];

        long i,ntoks,v[2],value,n1=1,nline,kt;
        long cMAXLAB[2]={1,MAXLAB}, labelCpl=MAXLAB;

        char* tokens[50];
        short tokcpl[50];

        if(ReadTextFile(strcat(strcpy(fspec,db->name),".dir"),&buf))
                                                                  return 1;

/*      clear directory information */

        db->base.cpl=0; db->base.nline=0; db->nbtabs=0; db->nfields=0;

/* ------------------------------------------------------------------ */
/*      translate the base type information */
/* ------------------------------------------------------------------ */

        for(i=0; i<buf.nline; i++)
        {
        ntoks=Parse(BlockPointer(buf,i+1),buf.cpl,tokens,tokcpl);

		  /* skip table name - assume base name */
		  /* if(i==0 && ntoks==1) continue; */
        if (i==0) continue;

/*      translate next field: bw type name display */

        if(ntoks < 4 ) InvalidLine

/*      clear those that may not get accessed */

        db->dspdec[db->nfields]=0;

/* --------------------- */
/*      byte width */
/* --------------------- */

        v[0]=1; v[1]=tokcpl[BYTE_WIDTH];

        if(chcdbf(tokens[BYTE_WIDTH],v,&value,&n1)) InvalidLine

        if(value<=0) InvalidLine

        db->blkfld[db->nfields][1]=value;

/* --------------------- */
/*      data type */
/* --------------------- */

        locase(tokens[DATA_TYPE],&n1);

        switch((int) *(tokens[DATA_TYPE]))
{
/* ------- */
case 'b':
/* ------- */

        db->ARMRtype[db->nfields]=db->type[db->nfields]=B_TYPE; break;

/* ------- */
case 'r':
/* ------- */

        db->ARMRtype[db->nfields]=db->type[db->nfields]=R_TYPE;


        if(tokcpl[DATA_TYPE]>1)
           {
           v[0]=2; v[1]=tokcpl[DATA_TYPE]-1;
           if(chcdbf(tokens[DATA_TYPE],v,&value,&n1)) InvalidLine
           if(value<0) InvalidLine
           db->dspdec[db->nfields]=(short)value;
           }
        break;

/* ------- */
case 'd':
/* ------- */

        db->type[db->nfields]=B_TYPE; db->ARMRtype[db->nfields]=D_TYPE; break;

/* ------- */
case 'e':
/* ------- */

        db->ARMRtype[db->nfields]=db->type[db->nfields]=E_TYPE; break;

/* ------- */
case 'z':
/* ------- */

        db->type[db->nfields]=B_TYPE; db->ARMRtype[db->nfields]=Z_TYPE; break;

/* ------- */
case 't':
/* ------- */

        db->ARMRtype[db->nfields]=db->type[db->nfields]=T_TYPE;

        if(tokcpl[DATA_TYPE]==1) InvalidLine

        v[0]=2; v[1]=tokcpl[DATA_TYPE]-1;
        if(chcdbf(tokens[DATA_TYPE],v,&value,&n1)) InvalidLine
        if(value<0 || value>MAXARX) InvalidLine

        db->tabinx[db->nfields]=(short)value;

        db->nbtabs=max((short)value,db->nbtabs);

        break;

/* ------- */
default:   InvalidLine
/* ------- */
}

/* --------------------- */
/*      field name */
/* --------------------- */

        v[0]=1;
        v[1] = (tokcpl[FIELD_NAME] < MAXLAB) ? tokcpl[FIELD_NAME] : MAXLAB-1;
        nline=db->nfields;

        db->labcpl[db->nfields] = (short) v[1];

        chmove(tokens[FIELD_NAME],v,park,cMAXLAB,&n1);
        park[v[1]]='\0';  /* make it a c-string */

/*      make sure field name is unique */

        value=0;
        chtab(db->label,&labelCpl,&nline,park,cMAXLAB,&value);

        if(value != db->nfields+1)
          {RootsError("Redundant field name: %.*s \n",
                                       tokcpl[FIELD_NAME],park); return 1;}

/* --------------------- */
/*      display width */
/* --------------------- */

        v[0]=1; v[1]=tokcpl[DISPLAY_WIDTH];

        if(chcdbf(tokens[DISPLAY_WIDTH],v,&value,&n1)) InvalidLine

        if(value<0) InvalidLine

        db->dspcpl[db->nfields]=(short)value;

        if(db->type[db->nfields] == R_TYPE && value>=100)
          {
          db->dspcpl[db->nfields]=(short)(value/100);
          db->dspdec[db->nfields]=(short)(value%100);
          }

/* --------------------- */
/*      step field count */
/* --------------------- */

        db->nfields++;
        if(db->nfields > MAXFLD) {RootsError("Too many fields \n");
                                                                 return 1;}
        }
/* ------------------------------------------------------------------ */
/*      complete the data structures */
/* ------------------------------------------------------------------ */

/*      clean out the table's dimensions */

        for(i=0; i<db->nbtabs; i++)
        {
        db->arx[i].cpl=0;
        db->arx[i].nline=0;
        db->arx[i].nAlloc=0;
        }

/*      scan all the fields and build table structures in the process */

        for(i=0; i<db->nfields; i++)
        {
        db->blkfld[i][0]=db->base.cpl+1;
        db->base.cpl+=db->blkfld[i][1];

        if(db->type[i] == T_TYPE)
             {
             kt=db->tabinx[i];
             if(db->arx[kt-1].cpl == 0)db->arx[kt-1].cpl=db->dspcpl[i];

             if(db->arx[kt-1].cpl != db->dspcpl[i])

               {RootsError(" table cpl missmatch for shared tabel T%d \n",
                                                            kt); return 1;}
             }

        }

/* ----------------------------------- */
/*      release buf and get out */
/* ----------------------------------- */

        free(buf.block);

        return 0;

/* ---------------------------------------------------------------------------- */
}       /* ReadAndTranslateDirectory  END */
/* ---------------------------------------------------------------------------- */


#define SkipBlanks 1
#define BuildToken 2

        long Parse(char* line, long cpl, char** tokens, short* tokcpl)

/* ---------------------------------------------------------------------------- */
{       /* Parse  START */
/* ---------------------------------------------------------------------------- */

        long ntoken=0,i;
        BYTE Scan=SkipBlanks;

        tokcpl[ntoken]=0;

        for(i=0; i<cpl; i++)
        {
        switch(Scan)
          {
          /* ------------- */
          case SkipBlanks:
          /* ------------- */

           if(*(line+i)==' ') break;

           ntoken++;

           tokens[ntoken-1]=line+i;
           tokcpl[ntoken-1]=1;

           Scan=BuildToken;

           break;

          /* ------------- */
          case BuildToken:
          /* ------------- */

           if(*(line+i)!=' '){tokcpl[ntoken-1]++; break;}

           tokcpl[ntoken]=0;

           Scan=SkipBlanks; break;
          }
        }

        return ntoken;

/* ---------------------------------------------------------------------------- */
}       /* Parse  END */
/* ---------------------------------------------------------------------------- */