// 
// Copyright (C) 2001, Ferran Pegueroles 
// 
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public License
// as published by the Free Software Foundation; either version 2.1,
// or (at your option) any later version.
// 
// This library 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 Lesser General Public License for more details.
// 
// You should have received a copy of the GNU Lesser General Public
// License along with this library; see the file COPYING.LIB.  If
// not, write to the Free Software Foundation, Inc., 59 Temple Place,
// Suite 330, Boston, MA 02111-1307 USA


//
//  Cobol Compiler Run Time Library -- Runtime error functions
//
//


//#include "htcoblib.h"

#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>

#ifdef __MINGW32__
#include <windows.h>
#endif

#include "rterrors.h"
#include "htcoblib.h"

/*------------------------------------------------------------------------*\
 |                                                                        |
 |                      table of messages                                 |
 |                                                                        |
\*------------------------------------------------------------------------*/
static struct _msg
{
    int msg_num;
    char *msg_text;
} rt_messages[] = {
    { TCERR_RESOLVE_STUB, "cannot resolve lib '%s': %s\n"},
    // Empty Message
    { TCERR_EMPTY, "%s"},
    //  Generic Messages
    { TCERR_NO_MEM, "cannot allocate memory\n"},
    { TCERR_NOT_IMPLEMENTED, "function not implemented\n"},
    // Chain / chaining
    { TCERR_GEN_NOPIPE, "cannot open pipe to pass data in chain: %s\n"},
    { TCERR_GEN_BADDATA, "error passing data to program: %s\n"},
    { TCERR_GEN_NOEXEC, "cannot execute program on chain: %s\n"},
    { TCERR_GEN_BAD_ARG, "error getting parameters passed from caller: %s\n"},
    { TCERR_GEN_SIZE_ERR, "size error on parameters passed on chain\n"},
    { TCERR_GEN_BAD_PIPE, "error opening descriptor 100 for chaining: %s\n"},
    { TCERR_GEN_RUNELEMENT, "error entering runelement\n"},
    //  Dynamic calls
    { 301, "error opening '%s': %s\n"},
    // Intrinsic functions
    { TCERR_INTRINSIC_BAD_ARG, "Bad arguments calling intrinsic function"},
    { -1, NULL}
};

/*
 * Alloc memory and report the error if cannot allocate
 */
void *
tcob_rt_malloc(char *function, size_t size)
{
    void *p;

    p = calloc(1, size+1);

    if (p)
        return p;

    tcob_rt_error(function, TCERR_NO_MEM);
    tcob_rt_abort();

    return NULL;
}

/*
 * Exit the program with error closing all the files.
 *
 */
void
tcob_rt_abort()
{
    tcob_stop_run();
    exit(1);
}

static void
tcob_rt_print_stack()
{
}

/*------------------------------------------------------------------------*\
 |                                                                        |
 |                      _format_message                                   |
 |                                                                        |
\*------------------------------------------------------------------------*/

static char *
_format_message(int msg_num, va_list ap)
{
    unsigned int i, size = 100;
    int n;
    char *p, *fmt = NULL;

    for (i = 0; rt_messages[i].msg_num != -1; i++)
    {
        if (rt_messages[i].msg_num == msg_num)
        {
            fmt = rt_messages[i].msg_text;
            break;
        }
    }
    if (fmt == NULL)
        return "Undefined message";
    if ((p = malloc(size)) == NULL)
        return "Cannot allocate message";
    while (1)
    {
        /* Try to print in the allocated space. */
#ifndef __MINGW32__	    
        n = vsnprintf(p, size, fmt, ap);
#else      
        n = _vsnprintf(p, size, fmt, ap);
#endif      
        /* If that worked, return the string. */
        if (n > -1 && n < (int) size)
            return p;
        /* Else try again with more space. */
        if (n > -1) /* glibc 2.1 */
            size = n + 1; /* precisely what is needed */
        else /* glibc 2.0 */
            size *= 2; /* twice the old size */

        if ((p = realloc(p, size)) == NULL)
            return NULL;
    }
}

/*------------------------------------------------------------------------*\
 |                                                                        |
 |                      tcob_rt_error                                     |
 |                                                                        |
\*------------------------------------------------------------------------*/
void
tcob_rt_error(char *function, int msg_num, ...)
{
    va_list ap;
    char *p;
    va_start(ap, msg_num);
    p = _format_message(msg_num, ap);
    va_end(ap);
    fprintf(stderr, "TC Runtime Error: %s: %s", function, p);
    tcob_rt_print_stack();
    tcob_rt_abort();
}

/*------------------------------------------------------------------------*\
 |                                                                        |
 |                      tcob_rt_warning                                   |
 |                                                                        |
\*------------------------------------------------------------------------*/

void
tcob_rt_warning(char *function, int msg_num, ...)
{
    va_list ap;
    char *p;
    va_start(ap, msg_num);
    p = _format_message(msg_num, ap);
    va_end(ap);
    fprintf(stderr, "TC Runtime Warning: %s: %s", function, p);
    tcob_rt_print_stack();
}

/*------------------------------------------------------------------------*\
 |                                                                        |
 |                      tcob_rt_debug                                     |
 |                                                                        |
\*------------------------------------------------------------------------*/

void
tcob_rt_debug(char * function, char *msg, ...)
{
#ifdef DEBUG_RTS
    unsigned int size = 100;
    int n;
    char *p;
    va_list ap;

    if ((p = malloc(size)) == NULL)
        return;
    while (1)
    {
        /* Try to print in the allocated space. */
#ifndef __MINGW32__	    
        n = vsnprintf(p, size, msg, ap);
#else      
        n = _vsnprintf(p, size, msg, ap);
#endif      
        /* If that worked, return the string. */
        if (n > -1 && n < (int) size)
            break;
        /* Else try again with more space. */
        if (n > -1) /* glibc 2.1 */
            size = n + 1; /* precisely what is needed */
        else /* glibc 2.0 */
            size *= 2; /* twice the old size */

        if ((p = realloc(p, size)) == NULL)
            return;
    }
    fprintf(stderr, "TC Debug: %s: %s", function, p);
#endif /* DEBUG_RTS */
}