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/*
* PC/HW routine collection v1.2 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 <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 int h_out, h_outbak, h_err, h_errbak;
int pc_open_stdout (void)
{
if ((h_out=open(tmpnam(NULL), O_WRONLY | O_CREAT | O_TRUNC | O_TEXT | O_TEMPORARY, S_IRUSR | S_IWUSR)) >= 0) {
if ((h_outbak=dup(1)) != -1) {
fflush(stdout);
if (dup2(h_out, 1) != -1) {
return 0;
}
close(h_outbak);
}
close(h_out);
}
return (h_out = -1);
}
void pc_close_stdout (void)
{
FILE *f;
char *line = alloca(512);
if (h_out >= 0) {
dup2(h_outbak, 1);
close(h_outbak);
if ((f=fdopen(h_out, "r")) != NULL) {
fseek(f, 0, SEEK_SET);
while (fgets(line, 512, f)) {
fputs(line, stdout);
}
fclose(f);
} else {
close(h_out);
}
}
}
int pc_open_stderr (void)
{
if ((h_err=open(tmpnam(NULL), O_WRONLY | O_CREAT | O_TRUNC | O_TEXT | O_TEMPORARY, S_IRUSR | S_IWUSR)) >= 0) {
if ((h_errbak=dup(2)) != -1) {
fflush(stderr);
if (dup2(h_err, 2) != -1) {
return 0;
}
close(h_errbak);
}
close(h_err);
}
return (h_err = -1);
}
void pc_close_stderr (void)
{
FILE *f;
char *line = alloca(512);
if (h_err >= 0) {
dup2(h_errbak, 2);
close(h_errbak);
if ((f=fdopen(h_err, "r")) != NULL) {
fseek(f, 0, SEEK_SET);
while (fgets(line, 512, f)) {
fputs(line, stderr);
}
fclose(f);
} else {
close(h_err);
}
}
}
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