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/*
* PC/HW routine collection v1.0 for DOS/DJGPP
*
* Copyright (C) 2002 - Borca Daniel
* Email : dborca@yahoo.com
* Web : http://www.geocities.com/dborca
*/
#include <dpmi.h>
#include <fcntl.h>
#include <sys/stat.h> /* for mode definitions */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "pc_hw.h"
/*
* atexit
*/
#define MAX_ATEXIT 32
static volatile int atexitcnt;
static VFUNC atexittbl[MAX_ATEXIT];
static void __attribute__((destructor)) doexit (void)
{
while (atexitcnt) atexittbl[--atexitcnt]();
}
int pc_clexit (VFUNC f)
{
int i;
for (i=0;i<atexitcnt;i++) {
if (atexittbl[i]==f) {
for (atexitcnt--;i<atexitcnt;i++) atexittbl[i] = atexittbl[i+1];
atexittbl[i] = 0;
return 0;
}
}
return -1;
}
int pc_atexit (VFUNC f)
{
pc_clexit(f);
if (atexitcnt<MAX_ATEXIT) {
atexittbl[atexitcnt++] = f;
return 0;
}
return -1;
}
/*
* locked memory allocation
*/
void *pc_malloc (size_t size)
{
void *p = malloc(size);
if (p) {
if (_go32_dpmi_lock_data(p, size)) {
free(p);
return NULL;
}
}
return p;
}
/*
* standard redirection
*/
static char errname[L_tmpnam];
static char outname[L_tmpnam];
static int h_out, h_outbak;
static int h_err, h_errbak;
void pc_open_stderr (void)
{
if (tmpnam(errname)) {
h_err = open(errname, O_WRONLY |/* O_BINARY |*/ O_CREAT | O_TRUNC,
S_IREAD | S_IWRITE);
h_errbak = dup(2);
fflush(stderr);
dup2(h_err, 2);
}
}
void pc_close_stderr (void)
{
FILE *f;
char *line = alloca(512);
dup2(h_errbak, 2);
close(h_err);
close(h_errbak);
if ((f=fopen(errname, "r"))!=NULL) {
while (fgets(line, 512, f)) {
fputs(line, stderr);
}
fclose(f);
}
remove(errname);
}
void pc_open_stdout (void)
{
if (tmpnam(outname)) {
h_out = open(outname, O_WRONLY |/* O_BINARY |*/ O_CREAT | O_TRUNC,
S_IREAD | S_IWRITE);
h_outbak = dup(1);
fflush(stdout);
dup2(h_out, 1);
}
}
void pc_close_stdout (void)
{
FILE *f;
char *line = alloca(512);
dup2(h_outbak, 1);
close(h_out);
close(h_outbak);
if ((f=fopen(outname, "r"))!=NULL) {
while (fgets(line, 512, f)) {
fputs(line, stdout);
}
fclose(f);
}
remove(outname);
}
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