freebsd-dev/lib/libI77/rsne.c
1997-04-13 01:16:58 +00:00

610 lines
11 KiB
C

#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 */
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 int n_nlcache;
static hashentry **zot;
static int colonseen;
extern ftnlen f__typesize[];
extern flag f__lquit;
extern int f__lcount, nml_read;
extern t_getc(Void);
#ifdef KR_headers
extern char *malloc(), *memset();
#ifdef ungetc
static int
un_getc(x,f__cf) int x; FILE *f__cf;
{ return ungetc(x,f__cf); }
#else
#define un_getc ungetc
extern int ungetc();
#endif
#else
#undef abs
#undef min
#undef max
#include "stdlib.h"
#include "string.h"
#ifdef ungetc
static int
un_getc(int x, FILE *f__cf)
{ return ungetc(x,f__cf); }
#else
#define un_getc ungetc
extern int ungetc(int, FILE*); /* for systems with a buggy stdio.h */
#endif
#endif
static Vardesc *
#ifdef KR_headers
hash(ht, s) hashtab *ht; register char *s;
#else
hash(hashtab *ht, register char *s)
#endif
{
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 *
#ifdef KR_headers
mk_hashtab(nl) Namelist *nl;
#else
mk_hashtab(Namelist *nl)
#endif
{
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(Void) {
register char *s;
register int c;
if(!f__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
#ifdef KR_headers
getname(s, slen) register char *s; int slen;
#else
getname(register char *s, int slen)
#endif
{
register char *se = s + slen - 1;
register int ch;
GETC(ch);
if (!(*s++ = Alpha[ch & 0xff])) {
if (ch != EOF)
ch = 115;
errfl(f__elist->cierr, ch, "namelist read");
}
while(*s = Alphanum[GETC(ch) & 0xff])
if (s < se)
s++;
if (ch == EOF)
err(f__elist->cierr, EOF, "namelist read");
if (ch > ' ')
Ungetc(ch,f__cf);
return *s = 0;
}
static int
#ifdef KR_headers
getnum(chp, val) int *chp; ftnlen *val;
#else
getnum(int *chp, ftnlen *val)
#endif
{
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
#ifdef KR_headers
getdimen(chp, d, delta, extent, x1)
int *chp; dimen *d; ftnlen delta, extent, *x1;
#else
getdimen(int *chp, dimen *d, ftnlen delta, ftnlen extent, ftnlen *x1)
#endif
{
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;
colonseen = 1;
}
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;
}
#ifndef No_Namelist_Questions
static Void
#ifdef KR_headers
print_ne(a) cilist *a;
#else
print_ne(cilist *a)
#endif
{
flag intext = f__external;
int rpsave = f__recpos;
FILE *cfsave = f__cf;
unit *usave = f__curunit;
cilist t;
t = *a;
t.ciunit = 6;
s_wsne(&t);
fflush(f__cf);
f__external = intext;
f__reading = 1;
f__recpos = rpsave;
f__cf = cfsave;
f__curunit = usave;
f__elist = a;
}
#endif
static char where0[] = "namelist read start ";
#ifdef KR_headers
x_rsne(a) cilist *a;
#else
x_rsne(cilist *a)
#endif
{
int ch, got1, k, n, nd, quote, readall;
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();
f__reading=1;
f__formatted=1;
got1 = 0;
top:
for(;;) switch(GETC(ch)) {
case EOF:
eof:
err(a->ciend,(EOF),where0);
case '&':
case '$':
goto have_amp;
#ifndef No_Namelist_Questions
case '?':
print_ne(a);
continue;
#endif
default:
if (ch <= ' ' && ch >= 0)
continue;
#ifndef No_Namelist_Comments
while(GETC(ch) != '\n')
if (ch == EOF)
goto eof;
#else
errfl(a->cierr, 115, where0);
#endif
}
have_amp:
if (ch = getname(buf,sizeof(buf)))
return ch;
nl = (Namelist *)a->cifmt;
if (strcmp(buf, nl->name))
#ifdef No_Bad_Namelist_Skip
errfl(a->cierr, 118, where0);
#else
{
fprintf(stderr,
"Skipping namelist \"%s\": seeking namelist \"%s\".\n",
buf, nl->name);
fflush(stderr);
for(;;) switch(GETC(ch)) {
case EOF:
err(a->ciend, EOF, where0);
case '/':
case '&':
case '$':
if (f__external)
e_rsle();
else
z_rnew();
goto top;
case '"':
case '\'':
quote = ch;
more_quoted:
while(GETC(ch) != quote)
if (ch == EOF)
err(a->ciend, EOF, where0);
if (GETC(ch) == quote)
goto more_quoted;
Ungetc(ch,f__cf);
default:
continue;
}
}
#endif
ht = mk_hashtab(nl);
if (!ht)
errfl(f__elist->cierr, 113, where0);
for(;;) {
for(;;) switch(GETC(ch)) {
case EOF:
if (got1)
return 0;
err(a->ciend, EOF, where0);
case '/':
case '$':
case '&':
return 0;
default:
if (ch <= ' ' && ch >= 0 || ch == ',')
continue;
Ungetc(ch,f__cf);
if (ch = getname(buf,sizeof(buf)))
return ch;
goto havename;
}
havename:
v = hash(ht,buf);
if (!v)
errfl(a->cierr, 119, where);
while(GETC(ch) <= ' ' && ch >= 0);
vaddr = v->addr;
type = v->type;
if (type < 0) {
size = -type;
type = TYCHAR;
}
else
size = f__typesize[type];
ivae = size;
iva = readall = 0;
if (ch == '(' /*)*/ ) {
dn = dimens;
if (!(dims = v->dims)) {
if (type != TYCHAR)
errfl(a->cierr, 122, where);
if (k = getdimen(&ch, dn, (ftnlen)size,
(ftnlen)size, &b))
errfl(a->cierr, k, where);
if (ch != ')')
errfl(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 = (int)dims[0];
nomax = span = dims[1];
ivae = iva + size*nomax;
colonseen = 0;
if (k = getdimen(&ch, dn, size, nomax, &b))
errfl(a->cierr, k, where);
no = dn->extent;
b0 = dims[2];
dims1 = dims += 3;
ex = 1;
for(n = 1; n++ < nd; dims++) {
if (ch != ',')
errfl(a->cierr, 115, where);
dn1 = dn + 1;
span /= *dims;
if (k = getdimen(&ch, dn1, dn->delta**dims,
span, &b1))
errfl(a->cierr, k, where);
ex *= *dims;
b += b1*ex;
no *= dn1->extent;
dn = dn1;
}
if (ch != ')')
errfl(a->cierr, 115, where);
readall = 1 - colonseen;
b -= b0;
if (b < 0 || b >= nomax)
errfl(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))
errfl(a->cierr, k, where);
if (ch != ')')
errfl(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;
}
if (readall)
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 != '=')
errfl(a->cierr, 115, where);
got1 = nml_read = 1;
f__lcount = 0;
readloop:
for(;;) {
if (iva >= ivae || iva < 0) {
f__lquit = 1;
goto mustend;
}
else if (iva + no1*size > ivae)
no1 = (ivae - iva)/size;
f__lquit = 0;
if (k = l_read(&no1, vaddr + iva, size, type))
return k;
if (f__lquit == 1)
return 0;
if (readall) {
iva += dn0->delta;
if (f__lcount > 0) {
no1 = (ivae - iva)/size;
if (no1 > f__lcount)
no1 = f__lcount;
iva += no1 * dn0->delta;
if (k = l_read(&no1, vaddr + iva,
size, type))
return k;
}
}
mustend:
GETC(ch);
if (readall)
if (iva >= ivae)
readall = 0;
else for(;;) {
switch(ch) {
case ' ':
case '\t':
case '\n':
GETC(ch);
continue;
}
break;
}
if (ch == '/' || ch == '$' || ch == '&') {
f__lquit = 1;
return 0;
}
else if (f__lquit) {
while(ch <= ' ' && ch >= 0)
GETC(ch);
Ungetc(ch,f__cf);
if (!Alpha[ch & 0xff] && ch >= 0)
errfl(a->cierr, 125, where);
break;
}
Ungetc(ch,f__cf);
if (readall && !Alpha[ch & 0xff])
goto readloop;
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
#ifdef KR_headers
s_rsne(a) cilist *a;
#else
s_rsne(cilist *a)
#endif
{
extern int l_eof;
int n;
f__external=1;
l_eof = 0;
if(n = c_le(a))
return n;
if(f__curunit->uwrt && f__nowreading(f__curunit))
err(a->cierr,errno,where0);
l_getc = t_getc;
l_ungetc = un_getc;
f__doend = xrd_SL;
n = x_rsne(a);
nml_read = 0;
if (n)
return n;
return e_rsle();
}