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#include "f2c.h"
#include "fio.h"
#include "string.h"
#ifndef NON_POSIX_STDIO
#ifdef MSDOS
#include "io.h"
#else
#include "unistd.h" /* for access */
#endif
#endif
#undef abs
#undef min
#undef max
#include "stdlib.h"
extern int f__canseek(FILE*);
extern integer f_clos(cllist*);
#ifdef NON_ANSI_RW_MODES
char *f__r_mode[2] = {"r", "r"};
char *f__w_mode[4] = {"w", "w", "r+w", "r+w"};
#else
char *f__r_mode[2] = {"rb", "r"};
char *f__w_mode[4] = {"wb", "w", "r+b", "r+"};
#endif
static char f__buf0[400], *f__buf = f__buf0;
int f__buflen = (int)sizeof(f__buf0);
static void f__bufadj(int n, int c)
{
unsigned int len;
char *nbuf, *s, *t, *te;
if (f__buf == f__buf0)
f__buflen = 1024;
while(f__buflen <= n)
f__buflen <<= 1;
len = (unsigned int)f__buflen;
if (len != f__buflen || !(nbuf = (char*)malloc(len)))
f__fatal(113, "malloc failure");
s = nbuf;
t = f__buf;
te = t + c;
while(t < te)
*s++ = *t++;
if (f__buf != f__buf0)
free(f__buf);
f__buf = nbuf;
}
int f__putbuf(int c)
{
char *s, *se;
int n;
if (f__hiwater > f__recpos)
f__recpos = f__hiwater;
n = f__recpos + 1;
if (n >= f__buflen)
f__bufadj(n, f__recpos);
s = f__buf;
se = s + f__recpos;
if (c)
*se++ = c;
*se = 0;
for(;;) {
fputs(s, f__cf);
s += strlen(s);
if (s >= se)
break; /* normally happens the first time */
putc(*s++, f__cf);
}
return 0;
}
void x_putc(int c)
{
if (f__recpos >= f__buflen)
f__bufadj(f__recpos, f__buflen);
f__buf[f__recpos++] = c;
}
#define opnerr(f,m,s) {if(f) errno= m; else opn_err(m,s,a); return(m);}
static void opn_err(int m, char *s, olist *a)
{
if (a->ofnm) {
/* supply file name to error message */
if (a->ofnmlen >= f__buflen)
f__bufadj((int)a->ofnmlen, 0);
g_char(a->ofnm, a->ofnmlen, f__curunit->ufnm = f__buf);
}
f__fatal(m, s);
}
integer f_open(olist *a)
{ unit *b;
integer rv;
char buf[256], *s;
cllist x;
int ufmt;
FILE *tf;
#ifndef NON_UNIX_STDIO
int n;
#endif
f__external = 1;
if(a->ounit>=MXUNIT || a->ounit<0)
err(a->oerr,101,"open")
if (!f__init)
f_init();
f__curunit = b = &f__units[a->ounit];
if(b->ufd) {
if(a->ofnm==0)
{
same: if (a->oblnk)
b->ublnk = *a->oblnk == 'z' || *a->oblnk == 'Z';
return(0);
}
#ifdef NON_UNIX_STDIO
if (b->ufnm
&& strlen(b->ufnm) == a->ofnmlen
&& !strncmp(b->ufnm, a->ofnm, (unsigned)a->ofnmlen))
goto same;
#else
g_char(a->ofnm,a->ofnmlen,buf);
if (f__inode(buf,&n) == b->uinode && n == b->udev)
goto same;
#endif
x.cunit=a->ounit;
x.csta=0;
x.cerr=a->oerr;
if ((rv = f_clos(&x)) != 0)
return rv;
}
b->url = (int)a->orl;
b->ublnk = a->oblnk && (*a->oblnk == 'z' || *a->oblnk == 'Z');
if(a->ofm==0)
{ if(b->url>0) b->ufmt=0;
else b->ufmt=1;
}
else if(*a->ofm=='f' || *a->ofm == 'F') b->ufmt=1;
else b->ufmt=0;
ufmt = b->ufmt;
#ifdef url_Adjust
if (b->url && !ufmt)
url_Adjust(b->url);
#endif
if (a->ofnm) {
g_char(a->ofnm,a->ofnmlen,buf);
if (!buf[0])
opnerr(a->oerr,107,"open")
}
else
sprintf(buf, "fort.%ld", (long)a->ounit);
b->uscrtch = 0;
b->uend=0;
b->uwrt = 0;
b->ufd = 0;
b->urw = 3;
switch(a->osta ? *a->osta : 'u')
{
case 'o':
case 'O':
#ifdef NON_POSIX_STDIO
if (!(tf = fopen(buf,"r")))
opnerr(a->oerr,errno,"open")
fclose(tf);
#else
if (access(buf,0))
opnerr(a->oerr,errno,"open")
#endif
break;
case 's':
case 'S':
b->uscrtch=1;
#ifdef NON_ANSI_STDIO
(void) strcpy(buf,"tmp.FXXXXXX");
(void) mktemp(buf);
goto replace;
#else
if (!(b->ufd = tmpfile()))
opnerr(a->oerr,errno,"open")
b->ufnm = 0;
#ifndef NON_UNIX_STDIO
b->uinode = b->udev = -1;
#endif
b->useek = 1;
return 0;
#endif
case 'n':
case 'N':
#ifdef NON_POSIX_STDIO
if ((tf = fopen(buf,"r")) || (tf = fopen(buf,"a"))) {
fclose(tf);
opnerr(a->oerr,128,"open")
}
#else
if (!access(buf,0))
opnerr(a->oerr,128,"open")
#endif
/* no break */
case 'r': /* Fortran 90 replace option */
case 'R':
#ifdef NON_ANSI_STDIO
replace:
#endif
if (tf = fopen(buf,f__w_mode[0]))
fclose(tf);
}
b->ufnm=(char *) malloc((unsigned int)(strlen(buf)+1));
if(b->ufnm==NULL) opnerr(a->oerr,113,"no space");
(void) strcpy(b->ufnm,buf);
if ((s = a->oacc) && b->url)
ufmt = 0;
if(!(tf = fopen(buf, f__w_mode[ufmt|2]))) {
if (tf = fopen(buf, f__r_mode[ufmt]))
b->urw = 1;
else if (tf = fopen(buf, f__w_mode[ufmt])) {
b->uwrt = 1;
b->urw = 2;
}
else
err(a->oerr, errno, "open");
}
b->useek = f__canseek(b->ufd = tf);
#ifndef NON_UNIX_STDIO
if((b->uinode = f__inode(buf,&b->udev)) == -1)
opnerr(a->oerr,108,"open")
#endif
if(b->useek)
if (a->orl)
rewind(b->ufd);
else if ((s = a->oacc) && (*s == 'a' || *s == 'A')
&& fseek(b->ufd, 0L, SEEK_END))
opnerr(a->oerr,129,"open");
return(0);
}
int fk_open(int seq, int fmt, ftnint n)
{ char nbuf[10];
olist a;
(void) sprintf(nbuf,"fort.%ld",(long)n);
a.oerr=1;
a.ounit=n;
a.ofnm=nbuf;
a.ofnmlen=strlen(nbuf);
a.osta=NULL;
a.oacc= seq==SEQ?"s":"d";
a.ofm = fmt==FMT?"f":"u";
a.orl = seq==DIR?1:0;
a.oblnk=NULL;
return(f_open(&a));
}
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