home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Language/OS - Multiplatform Resource Library
/
LANGUAGE OS.iso
/
f2c
/
may_5_92.lha
/
f2c.VMay_5_1992
/
libI77
/
rsne.c
< prev
next >
Wrap
C/C++ Source or Header
|
1992-05-07
|
9KB
|
462 lines
#include "f2c.h"
#include "fio.h"
#include "lio.h"
#define MAX_NL_CACHE 3 /* maximum number of namelist hash tables to cache */
#define MAXDIM 20 /* maximum number of subscripts */
extern char *malloc(), *memset();
struct dimen {
ftnlen extent;
ftnlen curval;
ftnlen delta;
ftnlen stride;
};
typedef struct dimen dimen;
struct hashentry {
struct hashentry *next;
char *name;
Vardesc *vd;
};
typedef struct hashentry hashentry;
struct hashtab {
struct hashtab *next;
Namelist *nl;
int htsize;
hashentry *tab[1];
};
typedef struct hashtab hashtab;
static hashtab *nl_cache;
static n_nlcache;
static hashentry **zot;
extern ftnlen typesize[];
extern flag lquit;
extern int lcount, nml_read;
extern int (*l_getc)(), (*l_ungetc)(), t_getc();
#ifdef ungetc
static int
un_getc(x,cf) int x; FILE *cf;
{ return ungetc(x,cf); }
#else
#define un_getc ungetc
extern int ungetc();
#endif
static Vardesc *
hash(ht, s)
hashtab *ht;
register char *s;
{
register int c, x;
register hashentry *h;
char *s0 = s;
for(x = 0; c = *s++; x = x & 0x4000 ? ((x << 1) & 0x7fff) + 1 : x << 1)
x += c;
for(h = *(zot = ht->tab + x % ht->htsize); h; h = h->next)
if (!strcmp(s0, h->name))
return h->vd;
return 0;
}
hashtab *
mk_hashtab(nl)
Namelist *nl;
{
int nht, nv;
hashtab *ht;
Vardesc *v, **vd, **vde;
hashentry *he;
hashtab **x, **x0, *y;
for(x = &nl_cache; y = *x; x0 = x, x = &y->next)
if (nl == y->nl)
return y;
if (n_nlcache >= MAX_NL_CACHE) {
/* discard least recently used namelist hash table */
y = *x0;
free((char *)y->next);
y->next = 0;
}
else
n_nlcache++;
nv = nl->nvars;
if (nv >= 0x4000)
nht = 0x7fff;
else {
for(nht = 1; nht < nv; nht <<= 1);
nht += nht - 1;
}
ht = (hashtab *)malloc(sizeof(hashtab) + (nht-1)*sizeof(hashentry *)
+ nv*sizeof(hashentry));
if (!ht)
return 0;
he = (hashentry *)&ht->tab[nht];
ht->nl = nl;
ht->htsize = nht;
ht->next = nl_cache;
nl_cache = ht;
memset((char *)ht->tab, 0, nht*sizeof(hashentry *));
vd = nl->vars;
vde = vd + nv;
while(vd < vde) {
v = *vd++;
if (!hash(ht, v->name)) {
he->next = *zot;
*zot = he;
he->name = v->name;
he->vd = v;
he++;
}
}
return ht;
}
static char Alpha[256], Alphanum[256];
static void
nl_init() {
register char *s;
register int c;
if(!init)
f_init();
for(s = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; c = *s++; )
Alpha[c]
= Alphanum[c]
= Alpha[c + 'a' - 'A']
= Alphanum[c + 'a' - 'A']
= c;
for(s = "0123456789_"; c = *s++; )
Alphanum[c] = c;
}
#define GETC(x) (x=(*l_getc)())
#define Ungetc(x,y) (*l_ungetc)(x,y)
static int
getname(s, slen)
register char *s;
int slen;
{
register char *se = s + slen - 1;
register int ch;
GETC(ch);
if (!(*s++ = Alpha[ch & 0xff])) {
if (ch != EOF)
ch = 115;
err(elist->cierr, ch, "namelist read");
}
while(*s = Alphanum[GETC(ch) & 0xff])
if (s < se)
s++;
if (ch == EOF)
err(elist->cierr, EOF, "namelist read");
if (ch > ' ')
Ungetc(ch,cf);
return *s = 0;
}
static int
getnum(chp, val)
int *chp;
ftnlen *val;
{
register int ch, sign;
register ftnlen x;
while(GETC(ch) <= ' ' && ch >= 0);
if (ch == '-') {
sign = 1;
GETC(ch);
}
else {
sign = 0;
if (ch == '+')
GETC(ch);
}
x = ch - '0';
if (x < 0 || x > 9)
return 115;
while(GETC(ch) >= '0' && ch <= '9')
x = 10*x + ch - '0';
while(ch <= ' ' && ch >= 0)
GETC(ch);
if (ch == EOF)
return EOF;
*val = sign ? -x : x;
*chp = ch;
return 0;
}
static int
getdimen(chp, d, delta, extent, x1)
int *chp;
dimen *d;
ftnlen delta, extent, *x1;
{
register int k;
ftnlen x2, x3;
if (k = getnum(chp, x1))
return k;
x3 = 1;
if (*chp == ':') {
if (k = getnum(chp, &x2))
return k;
x2 -= *x1;
if (*chp == ':') {
if (k = getnum(chp, &x3))
return k;
if (!x3)
return 123;
x2 /= x3;
}
if (x2 < 0 || x2 >= extent)
return 123;
d->extent = x2 + 1;
}
else
d->extent = 1;
d->curval = 0;
d->delta = delta;
d->stride = x3;
return 0;
}
static char where0[] = "namelist read start ";
x_rsne(a)
cilist *a;
{
int ch, got1, k, n, nd;
Namelist *nl;
static char where[] = "namelist read";
char buf[64];
hashtab *ht;
Vardesc *v;
dimen *dn, *dn0, *dn1;
ftnlen *dims, *dims1;
ftnlen b, b0, b1, ex, no, no1, nomax, size, span;
ftnint type;
char *vaddr;
long iva, ivae;
dimen dimens[MAXDIM], substr;
if (!Alpha['a'])
nl_init();
reading=1;
formatted=1;
got1 = 0;
for(;;) switch(GETC(ch)) {
case EOF:
err(a->ciend,(EOF),where0);
case '&':
case '$':
goto have_amp;
default:
if (ch <= ' ' && ch >= 0)
continue;
err(a->cierr, 115, where0);
}
have_amp:
if (ch = getname(buf,sizeof(buf)))
return ch;
nl = (Namelist *)a->cifmt;
if (strcmp(buf, nl->name))
err(a->cierr, 118, where0);
ht = mk_hashtab(nl);
if (!ht)
err(elist->cierr, 113, where0);
for(;;) {
for(;;) switch(GETC(ch)) {
case EOF:
if (got1)
return 0;
err(a->ciend,(EOF),where0);
case '/':
case '$':
return 0;
default:
if (ch <= ' ' && ch >= 0 || ch == ',')
continue;
Ungetc(ch,cf);
if (ch = getname(buf,sizeof(buf)))
return ch;
goto havename;
}
havename:
v = hash(ht,buf);
if (!v)
err(a->cierr, 119, where);
while(GETC(ch) <= ' ' && ch >= 0);
vaddr = v->addr;
type = v->type;
if (type < 0) {
size = -type;
type = TYCHAR;
}
else
size = typesize[type];
ivae = size;
iva = 0;
if (ch == '(' /*)*/ ) {
dn = dimens;
if (!(dims = v->dims)) {
if (type != TYCHAR)
err(a->cierr, 122, where);
if (k = getdimen(&ch, dn, (ftnlen)size,
(ftnlen)size, &b))
err(a->cierr, k, where);
if (ch != ')')
err(a->cierr, 115, where);
b1 = dn->extent;
if (--b < 0 || b + b1 > size)
return 124;
iva += b;
size = b1;
while(GETC(ch) <= ' ' && ch >= 0);
goto scalar;
}
nd = dims[0];
nomax = span = dims[1];
ivae = iva + size*nomax;
if (k = getdimen(&ch, dn, size, nomax, &b))
err(a->cierr, k, where);
no = dn->extent;
b0 = dims[2];
dims1 = dims += 3;
ex = 1;
for(n = 1; n++ < nd; dims++) {
if (ch != ',')
err(a->cierr, 115, where);
dn1 = dn + 1;
span /= *dims;
if (k = getdimen(&ch, dn1, dn->delta**dims,
span, &b1))
err(a->cierr, k, where);
ex *= *dims;
b += b1*ex;
no *= dn1->extent;
dn = dn1;
}
if (ch != ')')
err(a->cierr, 115, where);
b -= b0;
if (b < 0 || b >= nomax)
err(a->cierr, 125, where);
iva += size * b;
dims = dims1;
while(GETC(ch) <= ' ' && ch >= 0);
no1 = 1;
dn0 = dimens;
if (type == TYCHAR && ch == '(' /*)*/) {
if (k = getdimen(&ch, &substr, size, size, &b))
err(a->cierr, k, where);
if (ch != ')')
err(a->cierr, 115, where);
b1 = substr.extent;
if (--b < 0 || b + b1 > size)
return 124;
iva += b;
b0 = size;
size = b1;
while(GETC(ch) <= ' ' && ch >= 0);
if (b1 < b0)
goto delta_adj;
}
for(; dn0 < dn; dn0++) {
if (dn0->extent != *dims++ || dn0->stride != 1)
break;
no1 *= dn0->extent;
}
if (dn0 == dimens && dimens[0].stride == 1) {
no1 = dimens[0].extent;
dn0++;
}
delta_adj:
ex = 0;
for(dn1 = dn0; dn1 <= dn; dn1++)
ex += (dn1->extent-1)
* (dn1->delta *= dn1->stride);
for(dn1 = dn; dn1 > dn0; dn1--) {
ex -= (dn1->extent - 1) * dn1->delta;
dn1->delta -= ex;
}
}
else if (dims = v->dims) {
no = no1 = dims[1];
ivae = iva + no*size;
}
else
scalar:
no = no1 = 1;
if (ch != '=')
err(a->cierr, 115, where);
got1 = nml_read = 1;
lcount = 0;
readloop:
for(;;) {
if (iva >= ivae || iva < 0) {
lquit = 1;
goto mustend;
}
else if (iva + no1*size > ivae)
no1 = (ivae - iva)/size;
lquit = 0;
l_read(&no1, vaddr + iva, size, type);
if (lquit == 1)
return 0;
mustend:
if (GETC(ch) == '/' || ch == '$') {
lquit = 1;
return 0;
}
else if (lquit) {
while(ch <= ' ' && ch >= 0)
GETC(ch);
Ungetc(ch,cf);
if (!Alpha[ch & 0xff] && ch >= 0)
err(a->cierr, 125, where);
break;
}
Ungetc(ch,cf);
if ((no -= no1) <= 0)
break;
for(dn1 = dn0; dn1 <= dn; dn1++) {
if (++dn1->curval < dn1->extent) {
iva += dn1->delta;
goto readloop;
}
dn1->curval = 0;
}
break;
}
}
}
integer
s_rsne(a)
cilist *a;
{
int n;
extern integer e_rsle();
external=1;
if(n = c_le(a))
return n;
if(curunit->uwrt && nowreading(curunit))
err(a->cierr,errno,where0);
l_getc = t_getc;
l_ungetc = un_getc;
if (n = x_rsne(a))
return n;
return e_rsle();
}