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counters.c

/* counters.c - Routines to access TeX variables that contain TeX counters

Copyright (C) 2001-2002 The Free Software Foundation

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

This file is available from http://sourceforge.net/projects/latex2rtf/
*/

#include <stdlib.h>
#include <string.h>
#include "main.h"
#include "util.h"
#include "counters.h"

#define MAX_COUNTERS 50

struct {
    char *name;
    int number;
} Counters[MAX_COUNTERS];

static int iCounterCount = 0;

static int existsCounter(char *s)

/**************************************************************************
     purpose: checks to see if a named TeX counter exists
     returns: the array index of the named TeX counter
**************************************************************************/
{
    int i = 0;

    while (i < iCounterCount && strstr(Counters[i].name, s) == NULL)
        i++;

    if (i == iCounterCount)
        return -1;
    else
        return i;
}

static void newCounter(char *s, int n)

/**************************************************************************
     purpose: allocates and initializes a named TeX counter 
**************************************************************************/
{
    if (iCounterCount == MAX_COUNTERS) {
        fprintf(stderr, "Too many counters, ignoring %s", s);
        return;
    }

    Counters[iCounterCount].number = n;
    Counters[iCounterCount].name = strdup(s);

    if (Counters[iCounterCount].name == NULL) {
        fprintf(stderr, "\nCannot allocate name for counter \\%s\n", s);
        exit(1);
    }

    iCounterCount++;
}

void incrementCounter(char *s)

/**************************************************************************
     purpose: increments a TeX counter (or initializes to 1) 
**************************************************************************/
{
    int i;

    i = existsCounter(s);

    if (i < 0)
        newCounter(s, 1);
    else
        Counters[i].number++;
}

void setCounter(char *s, int n)

/**************************************************************************
     purpose: allocates (if necessary) and sets a named TeX counter 
**************************************************************************/
{
    int i;

    i = existsCounter(s);

    if (i < 0)
        newCounter(s, n);
    else
        Counters[i].number = n;
}

int getCounter(char *s)

/**************************************************************************
     purpose: retrieves a named TeX counter 
**************************************************************************/
{
    int i;

    i = existsCounter(s);

    if (i < 0) {
        fprintf(stderr, "No counter of type <%s>", s);
        return 0;
    }

    return Counters[i].number;
}

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