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/* External procedures for the binary demo program using GPC */
#include "GPCtypes.h" /* defines GNU Pascal I/O structure */
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#define namelength 100 /* should agree with binarydemo.p */
bool Argv(int n, char* str)
{
register char *s,*t;
if (n<0 || n>=_p_argc) return FALSE;
s=_p_argv[n];
if (strlen(s) >= namelength) return FALSE;
for (t=str; *s; s++,t++) *t=*s;
*t='\0';
return TRUE;
}
void Bread(FDR filep, char *x)
{
/* reads a character WITHOUT using the Pascal runtime buffers etc */
register char c;
c=getc(filep->FilJfn);
*x=c;
}
bool Testeof(FDR filep)
{
register int c;
register FILE *iop; /* stdio-style FILE pointer */
iop = filep->FilJfn;
if (feof(iop)) return TRUE;
c = getc(iop);
if (c == EOF) return TRUE;
else {
ungetc(c,iop);
return FALSE;
}
}
bool Testreadaccess(char *fn)
{
return access(fn,R_OK)? FALSE: TRUE;
}
bool Testwriteaccess(fn)
char *fn;
{
int f;
f = creat(fn,0666); /* we try to create a new file, because
simply testing write access with access(fn,W_OK)
will fail when the file doesn't exist */
if (f >= 0) {
close(f); return TRUE;
} else return FALSE;
}
int Flength(FDR filep)
{
register FILE *iop; /* stdio-style FILE pointer */
register long pos; /* current file position */
register int len; /* the file length */
iop = filep->FilJfn;
pos = ftell(iop);
fseek(iop,0L,SEEK_END);
len = ftell(iop);
fseek(iop,pos,0);
return len;
}
void Movetobyte(FDR filep,int cnt)
{
register FILE *iop; /* stdio-style FILE pointer */
iop = filep->FilJfn;
fseek(iop,(long)cnt,SEEK_SET);
}
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