mirror of
https://github.com/levinsv/pgadmin3.git
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108 lines
2.7 KiB
C++
108 lines
2.7 KiB
C++
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/*
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* M_APM - mapmstck.c
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*
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* Copyright (C) 1999 - 2007 Michael C. Ring
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*
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* Permission to use, copy, and distribute this software and its
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* documentation for any purpose with or without fee is hereby granted,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation.
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*
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* Permission to modify the software is granted. Permission to distribute
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* the modified code is granted. Modifications are to be distributed by
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* using the file 'license.txt' as a template to modify the file header.
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* 'license.txt' is available in the official MAPM distribution.
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*
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* This software is provided "as is" without express or implied warranty.
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*/
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/*
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*
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* This file contains the stack implementation for using
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* local M_APM variables.
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*
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*/
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#include "pgAdmin3.h"
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#include "pgscript/utilities/mapm-lib/m_apm_lc.h"
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static int M_stack_ptr = -1;
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static int M_last_init = -1;
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static int M_stack_size = 0;
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static const char *M_stack_err_msg = "\'M_get_stack_var\', Out of memory";
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static M_APM *M_stack_array;
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/****************************************************************************/
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void M_free_all_stck()
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{
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int k;
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if (M_last_init >= 0)
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{
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for (k = 0; k <= M_last_init; k++)
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m_apm_free(M_stack_array[k]);
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M_stack_ptr = -1;
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M_last_init = -1;
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M_stack_size = 0;
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MAPM_FREE(M_stack_array);
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}
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}
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/****************************************************************************/
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M_APM M_get_stack_var()
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{
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void *vp;
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if (++M_stack_ptr > M_last_init)
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{
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if (M_stack_size == 0)
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{
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M_stack_size = 18;
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if ((vp = MAPM_MALLOC(M_stack_size * sizeof(M_APM))) == NULL)
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{
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/* fatal, this does not return */
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M_apm_log_error_msg(M_APM_FATAL, M_stack_err_msg);
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}
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M_stack_array = (M_APM *)vp;
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}
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if ((M_last_init + 4) >= M_stack_size)
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{
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M_stack_size += 12;
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if ((vp = MAPM_REALLOC(M_stack_array,
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(M_stack_size * sizeof(M_APM)))) == NULL)
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{
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/* fatal, this does not return */
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M_apm_log_error_msg(M_APM_FATAL, M_stack_err_msg);
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}
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M_stack_array = (M_APM *)vp;
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}
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M_stack_array[M_stack_ptr] = m_apm_init();
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M_stack_array[M_stack_ptr + 1] = m_apm_init();
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M_stack_array[M_stack_ptr + 2] = m_apm_init();
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M_stack_array[M_stack_ptr + 3] = m_apm_init();
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M_last_init = M_stack_ptr + 3;
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/* printf("M_last_init = %d \n",M_last_init); */
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}
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return(M_stack_array[M_stack_ptr]);
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}
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/****************************************************************************/
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void M_restore_stack(int count)
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{
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M_stack_ptr -= count;
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}
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/****************************************************************************/
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