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string.h is ANSI C include file
[unix-history] / usr / src / usr.bin / f77 / libI77 / rsnmle.c
/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*
* @(#)rsnmle.c 5.4 %G%
*/
/*
* name-list read
*/
#include "fio.h"
#include "lio.h"
#include "nmlio.h"
#include <ctype.h>
LOCAL char *nml_rd;
static int ch;
LOCAL nameflag;
LOCAL char var_name[VL+1];
#define SP 1
#define B 2
#define AP 4
#define EX 8
#define INTG 16
#define RL 32
#define LGC 64
#define IRL (INTG | RL | LGC )
#define isblnk(x) (ltab[x+1]&B) /* space, tab, newline */
#define issep(x) (ltab[x+1]&SP) /* space, tab, newline, comma */
#define isapos(x) (ltab[x+1]&AP) /* apost., quote mark */
#define isexp(x) (ltab[x+1]&EX) /* d, e, D, E */
#define isint(x) (ltab[x+1]&INTG) /* 0-9, plus, minus */
#define isrl(x) (ltab[x+1]&RL) /* 0-9, plus, minus, period */
#define islgc(x) (ltab[x+1]&LGC) /* 0-9, period, t, f, T, F */
#define GETC (ch=t_getc())
#define UNGETC() ungetc(ch,cf)
LOCAL char *lchar;
LOCAL double lx,ly;
LOCAL int ltype;
int t_getc(), ungetc();
LOCAL char ltab[128+1] =
{ 0, /* offset one for EOF */
/* 0- 15 */ 0,0,0,0,0,0,0,0,0,SP|B,SP|B,0,0,0,0,0, /* TAB,NEWLINE */
/* 16- 31 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
/* 32- 47 */ SP|B,0,AP,0,0,0,0,AP,0,0,0,RL|INTG,SP,RL|INTG,RL|LGC,0, /* space,",',comma,., */
/* 48- 63 */ IRL,IRL,IRL,IRL,IRL,IRL,IRL,IRL,IRL,IRL,0,0,0,0,0,0, /* digits */
/* 64- 79 */ 0,0,0,0,EX,EX,LGC,0,0,0,0,0,0,0,0,0, /* D,E,F */
/* 80- 95 */ 0,0,0,0,LGC,0,0,0,0,0,0,0,0,0,0,0, /* T */
/* 96-111 */ 0,0,0,0,EX,EX,LGC,0,0,0,0,0,0,0,0,0, /* d,e,f */
/* 112-127 */ 0,0,0,0,LGC,0,0,0,0,0,0,0,0,0,0,0 /* t */
};
s_rsne(a) namelist_arglist *a;
{
int n;
struct namelistentry *entry;
int nelem, vlen, vtype;
char *nmlist_nm, *addr;
nml_rd = "namelist read";
reading = YES;
formatted = NAMELIST;
fmtbuf = "ext namelist io";
if(n=c_le(a,READ)) return(n);
getn = t_getc;
ungetn = ungetc;
leof = curunit->uend;
if(curunit->uwrt && ! nowreading(curunit)) err(errflag, errno, nml_rd)
/* look for " &namelistname " */
nmlist_nm = a->namelist->namelistname;
while(isblnk(GETC)) ;
/* check for "&end" (like IBM) or "$end" (like DEC) */
if(ch != '&' && ch != '$') goto rderr;
/* save it - write out using the same character as used on input */
namelistkey_ = ch;
while( *nmlist_nm )
if( GETC != *nmlist_nm++ )
{
nml_rd = "incorrect namelist name";
goto rderr;
}
if(!isblnk(GETC)) goto rderr;
while(isblnk(GETC)) ;
if(leof) goto rderr;
UNGETC();
while( GETC != namelistkey_ )
{
UNGETC();
/* get variable name */
if(!nameflag && rd_name(var_name)) goto rderr;
entry = a->namelist->names;
/* loop through namelist entries looking for this variable name */
while( entry->varname[0] != 0 )
{
if( strcmp(entry->varname, var_name) == 0 ) goto got_name;
entry++;
}
nml_rd = "incorrect variable name";
goto rderr;
got_name:
if( n = get_pars( entry, &addr, &nelem, &vlen, &vtype ))
goto rderr_n;
while(isblnk(GETC)) ;
if(ch != '=') goto rderr;
nameflag = NO;
if(n = l_read( nelem, addr, vlen, vtype )) goto rderr_n;
while(isblnk(GETC));
if(ch == ',') while(isblnk(GETC));
UNGETC();
if(leof) goto rderr;
}
/* check for 'end' after '&' or '$'*/
if(GETC!='e' || GETC!='n' || GETC!='d' )
goto rderr;
/* flush to next input record */
flush:
while(GETC != '\n' && ch != EOF);
return(ch == EOF ? EOF : OK);
rderr:
if(leof)
n = EOF;
else
n = F_ERNMLIST;
rderr_n:
if(n == EOF ) err(endflag,EOF,nml_rd);
/* flush after error in case restart I/O */
if(ch != '\n') while(GETC != '\n' && ch != EOF) ;
err(errflag,n,nml_rd)
}
#define MAXSUBS 7
LOCAL
get_pars( entry, addr, nelem, vlen, vtype )
struct namelistentry *entry;
char **addr; /* beginning address to read into */
int *nelem, /* number of elements to read */
*vlen, /* length of elements */
*vtype; /* type of elements */
{
int offset, i, n,
*dimptr, /* points to dimensioning info */
ndim, /* number of dimensions */
baseoffset, /* offset of corner element */
*span, /* subscript span for each dimension */
subs[MAXSUBS], /* actual subscripts */
subcnt = -1; /* number of actual subscripts */
/* get element size and base address */
*vlen = entry->typelen;
*addr = entry->varaddr;
/* get type */
switch ( *vtype = entry->type ) {
case TYSHORT:
case TYLONG:
case TYREAL:
case TYDREAL:
case TYCOMPLEX:
case TYDCOMPLEX:
case TYLOGICAL:
case TYCHAR:
break;
default:
fatal(F_ERSYS,"unknown type in rsnmle");
}
/* get number of elements */
dimptr = entry->dimp;
if( dimptr==NULL )
{ /* scalar */
*nelem = 1;
return(OK);
}
if( GETC != '(' )
{ /* entire array */
*nelem = dimptr[1];
UNGETC();
return(OK);
}
/* get element length, number of dimensions, base, span vector */
ndim = dimptr[0];
if(ndim<=0 || ndim>MAXSUBS) fatal(F_ERSYS,"illegal dimensions");
baseoffset = dimptr[2];
span = dimptr+3;
/* get subscripts from input data */
while(ch!=')') {
if( ++subcnt > MAXSUBS-1 ) return F_ERNMLIST;
if(n=get_int(&subs[subcnt])) return n;
GETC;
if(leof) return EOF;
if(ch != ',' && ch != ')') return F_ERNMLIST;
}
if( ++subcnt != ndim ) return F_ERNMLIST;
offset = subs[ndim-1];
for( i = ndim-2; i>=0; i-- )
offset = subs[i] + span[i]*offset;
offset -= baseoffset;
*nelem = dimptr[1] - offset;
if( offset < 0 || offset >= dimptr[1] )
return F_ERNMLIST;
*addr = *addr + (*vlen)*offset;
return OK;
}
LOCAL
get_int(subval)
int *subval;
{
int sign=0, value=0, cnt=0;
/* look for sign */
if(GETC == '-') sign = -1;
else if(ch == '+') ;
else UNGETC();
if(ch == EOF) return(EOF);
while(isdigit(GETC))
{
value = 10*value + ch-'0';
cnt++;
}
UNGETC();
if(ch == EOF) return EOF;
if(cnt == 0 ) return F_ERNMLIST;
if(sign== -1) value = -value;
*subval = value;
return OK;
}
LOCAL
rd_name(ptr)
char *ptr;
{
/* read a variable name from the input stream */
char *init = ptr-1;
if(!isalpha(GETC)) {
UNGETC();
return(ERROR);
}
*ptr++ = ch;
while(isalnum(GETC))
{
if(ptr-init > VL ) return(ERROR);
*ptr++ = ch;
}
*ptr = '\0';
UNGETC();
return(OK);
}
LOCAL
t_getc()
{ int ch;
static newline = YES;
rd:
if(curunit->uend) {
leof = EOF;
return(EOF);
}
if((ch=getc(cf))!=EOF)
{
if(ch == '\n') newline = YES;
else if(newline==YES)
{ /* skip first character on each line for namelist */
newline = NO;
goto rd;
}
return(ch);
}
if(feof(cf))
{ curunit->uend = YES;
leof = EOF;
}
else clearerr(cf);
return(EOF);
}
LOCAL
l_read(number,ptr,len,type) ftnint number,type; flex *ptr; ftnlen len;
{ int i,n;
double *yy;
float *xx;
lcount = 0;
for(i=0;i<number;i++)
{
if(leof) return EOF;
if(lcount==0)
{
ltype = NULL;
if(i!=0)
{ /* skip to comma */
while(isblnk(GETC));
if(leof) return(EOF);
if(ch == namelistkey_)
{ UNGETC();
return(OK);
}
if(ch != ',' ) return(F_ERNMLIST);
}
while(isblnk(GETC));
if(leof) return(EOF);
UNGETC();
if(i!=0 && ch == namelistkey_) return(OK);
switch((int)type)
{
case TYSHORT:
case TYLONG:
if(!isint(ch)) return(OK);
ERRNM(l_R(1));
break;
case TYREAL:
case TYDREAL:
if(!isrl(ch)) return(OK);
ERRNM(l_R(1));
break;
case TYCOMPLEX:
case TYDCOMPLEX:
if(!isdigit(ch) && ch!='(') return(OK);
ERRNM(l_C());
break;
case TYLOGICAL:
if(!islgc(ch)) return(OK);
ERRNM(l_L());
if(nameflag) return(OK);
break;
case TYCHAR:
if(!isdigit(ch) && !isapos(ch)) return(OK);
ERRNM(l_CHAR());
break;
}
if(leof) return(EOF);
/* peek at next character -
should be separator or namelistkey_ */
GETC; UNGETC();
if(!issep(ch) && (ch != namelistkey_))
return( leof?EOF:F_ERNMLIST );
}
if(!ltype) return(F_ERNMLIST);
switch((int)type)
{
case TYSHORT:
ptr->flshort=lx;
break;
case TYLOGICAL:
if(len == sizeof(short))
ptr->flshort = lx;
else
ptr->flint = lx;
break;
case TYLONG:
ptr->flint=lx;
break;
case TYREAL:
ptr->flreal=lx;
break;
case TYDREAL:
ptr->fldouble=lx;
break;
case TYCOMPLEX:
xx=(float *)ptr;
*xx++ = ly;
*xx = lx;
break;
case TYDCOMPLEX:
yy=(double *)ptr;
*yy++ = ly;
*yy = lx;
break;
case TYCHAR:
b_char(lchar,(char *)ptr,len);
break;
}
if(lcount>0) lcount--;
ptr = (flex *)((char *)ptr + len);
}
if(lcount>0) return F_ERNMLIST;
return(OK);
}
LOCAL
get_repet()
{
double lc;
if(isdigit(GETC))
{ UNGETC();
rd_int(&lc);
lcount = (int)lc;
if(GETC!='*')
if(leof) return(EOF);
else return(F_ERREPT);
}
else
{ lcount = 1;
UNGETC();
}
return(OK);
}
LOCAL
l_R(flg) int flg;
{ double a,b,c,d;
int da,db,dc,dd;
int i,sign=0;
a=b=c=d=0;
da=db=dc=dd=0;
if( flg ) /* real */
{
da=rd_int(&a); /* repeat count ? */
if(GETC=='*')
{
if (a <= 0.) return(F_ERNREP);
lcount=(int)a;
db=rd_int(&b); /* whole part of number */
}
else
{ UNGETC();
db=da;
b=a;
lcount=1;
}
}
else /* complex */
{
db=rd_int(&b);
}
if(GETC=='.' && isdigit(GETC))
{ UNGETC();
dc=rd_int(&c); /* fractional part of number */
}
else
{ UNGETC();
dc=0;
c=0.;
}
if(isexp(GETC))
dd=rd_int(&d); /* exponent */
else if (ch == '+' || ch == '-')
{ UNGETC();
dd=rd_int(&d);
}
else
{ UNGETC();
dd=0;
}
if(db<0 || b<0)
{ sign=1;
b = -b;
}
for(i=0;i<dc;i++) c/=10.;
b=b+c;
if (dd > 0)
{ for(i=0;i<d;i++) b *= 10.;
for(i=0;i< -d;i++) b /= 10.;
}
lx=sign?-b:b;
ltype=TYLONG;
return(OK);
}
LOCAL
rd_int(x) double *x;
{ int sign=0,i=0;
double y=0.0;
if(GETC=='-') sign = -1;
else if(ch=='+') sign=0;
else UNGETC();
while(isdigit(GETC))
{ i++;
y=10*y + ch-'0';
}
UNGETC();
if(sign) y = -y;
*x = y;
return(y==0.0?sign:i); /* 0:[+]&&y==0, -1:-&&y==0, >0:#digits&&y!=0 */
}
LOCAL
l_C()
{ int n;
if(n=get_repet()) return(n); /* get repeat count */
if(GETC!='(') err(errflag,F_ERNMLIST,"no (")
while(isblnk(GETC));
UNGETC();
l_R(0); /* get real part */
ly = lx;
while(isblnk(GETC)); /* get comma */
if(leof) return(EOF);
if(ch!=',') return(F_ERNMLIST);
while(isblnk(GETC));
UNGETC();
if(leof) return(EOF);
l_R(0); /* get imag part */
while(isblnk(GETC));
if(ch!=')') err(errflag,F_ERNMLIST,"no )")
ltype = TYCOMPLEX;
return(OK);
}
LOCAL
l_L()
{
int n, keychar=ch, scanned=NO;
if(ch=='f' || ch=='F' || ch=='t' || ch=='T')
{
scanned=YES;
if(rd_name(var_name))
return(leof?EOF:F_ERNMLIST);
while(isblnk(GETC));
UNGETC();
if(ch == '=' || ch == '(')
{ /* found a name, not a value */
nameflag = YES;
return(OK);
}
}
else
{
if(n=get_repet()) return(n); /* get repeat count */
if(GETC=='.') GETC;
keychar = ch;
}
switch(keychar)
{
case 't':
case 'T':
lx=1;
break;
case 'f':
case 'F':
lx=0;
break;
default:
if(ch==EOF) return(EOF);
else err(errflag,F_ERNMLIST,"logical not T or F");
}
ltype=TYLOGICAL;
if(scanned==NO)
{
while(!issep(GETC) && ch!=EOF) ;
UNGETC();
}
if(ch == EOF ) return(EOF);
return(OK);
}
#define BUFSIZE 128
LOCAL
l_CHAR()
{ int size,i,n;
char quote,*p;
if(n=get_repet()) return(n); /* get repeat count */
if(isapos(GETC)) quote=ch;
else if(ch == EOF) return EOF;
else return F_ERNMLIST;
ltype=TYCHAR;
if(lchar!=NULL) free(lchar);
size=BUFSIZE-1;
p=lchar=(char *)malloc(BUFSIZE);
if(lchar==NULL) return (F_ERSPACE);
for(i=0;;)
{ while( GETC!=quote && ch!='\n' && ch!=EOF && ++i<size )
*p++ = ch;
if(i==size)
{
newone:
size += BUFSIZE;
lchar=(char *)realloc(lchar, size+1);
if(lchar==NULL) return( F_ERSPACE );
p=lchar+i-1;
*p++ = ch;
}
else if(ch==EOF) return(EOF);
else if(ch=='\n')
{ if(*(p-1) == '\\') *(p-1) = ch;
}
else if(GETC==quote)
{ if(++i<size) *p++ = ch;
else goto newone;
}
else
{ UNGETC();
*p = '\0';
return(OK);
}
}
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.