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ncgen.y
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ncgen.y
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/*********************************************************************
* Copyright 2018, UCAR/Unidata
* See netcdf/COPYRIGHT file for copying and redistribution conditions.
* $Id: ncgen.y,v 1.42 2010/05/18 21:32:46 dmh Exp $
*********************************************************************/
/* yacc source for "ncgen", a netCDL parser and netCDF generator */
%define parse.error verbose
%{
/*
static char SccsId[] = "$Id: ncgen.y,v 1.42 2010/05/18 21:32:46 dmh Exp $";
*/
#include "includes.h"
#include "netcdf_aux.h"
#include "ncgeny.h"
#include "ncgen.h"
#ifdef USE_NETCDF4
#include "netcdf_filter.h"
#endif
/* Following are in ncdump (for now)*/
/* Need some (unused) definitions to get it to compile */
#define ncatt_t void*
#define ncvar_t void
#include "nctime.h"
#undef GENLIB1
/* parser controls */
#define YY_NO_INPUT 1
/* True if string a equals string b*/
#ifndef NCSTREQ
#define NCSTREQ(a, b) (*(a) == *(b) && strcmp((a), (b)) == 0)
#endif
#define VLENSIZE (sizeof(nc_vlen_t))
#define MAXFLOATDIM 4294967295.0
/* mnemonics */
typedef enum Attrkind {ATTRVAR, ATTRGLOBAL, DONTKNOW} Attrkind;
#define ISCONST 1
#define ISLIST 0
typedef nc_vlen_t vlen_t;
/* We retain the old representation of the symbol list
as a linked list.
*/
List* symlist;
/* Track rootgroup separately*/
Symbol* rootgroup;
/* Track the group sequence */
static List* groupstack;
/* Provide a separate sequence for accumulating values
during the parse.
*/
static List* stack;
/* track homogeneity of types for data lists*/
static nc_type consttype;
/* Misc. */
static int stackbase;
static int stacklen;
static int count;
static int opaqueid; /* counter for opaque constants*/
static int arrayuid; /* counter for pseudo-array types*/
char* primtypenames[PRIMNO] = {
"nat",
"byte", "char", "short",
"int", "float", "double",
"ubyte", "ushort", "uint",
"int64", "uint64",
"string"
};
static int GLOBAL_SPECIAL = _NCPROPS_FLAG
| _ISNETCDF4_FLAG
| _SUPERBLOCK_FLAG
| _FORMAT_FLAG ;
/*Defined in ncgen.l*/
extern int lineno; /* line number for error messages */
extern Bytebuffer* lextext; /* name or string with escapes removed */
extern double double_val; /* last double value read */
extern float float_val; /* last float value read */
extern long long int64_val; /* last int64 value read */
extern int int32_val; /* last int32 value read */
extern short int16_val; /* last short value read */
extern unsigned long long uint64_val; /* last int64 value read */
extern unsigned int uint32_val; /* last int32 value read */
extern unsigned short uint16_val; /* last short value read */
extern char char_val; /* last char value read */
extern signed char byte_val; /* last byte value read */
extern unsigned char ubyte_val; /* last byte value read */
/* Track definitions of dims, types, attributes, and vars*/
List* grpdefs;
List* dimdefs;
List* attdefs; /* variable-specific attributes*/
List* gattdefs; /* global attributes only*/
List* xattdefs; /* unknown attributes*/
List* typdefs;
List* vardefs;
List* tmp;
/* Forward */
static NCConstant* makeconstdata(nc_type);
static NCConstant* evaluate(Symbol* fcn, Datalist* arglist);
static NCConstant* makeenumconstref(Symbol*);
static void addtogroup(Symbol*);
static Symbol* currentgroup(void);
static Symbol* createrootgroup(const char*);
static Symbol* creategroup(Symbol*);
static int dupobjectcheck(nc_class,Symbol*);
static void setpathcurrent(Symbol* sym);
static Symbol* makeattribute(Symbol*,Symbol*,Symbol*,Datalist*,Attrkind);
static Symbol* makeprimitivetype(nc_type i);
static Symbol* makespecial(int tag, Symbol* vsym, Symbol* tsym, void* data, int isconst);
static int containsfills(Datalist* list);
static void vercheck(int ncid);
static long long extractint(NCConstant* con);
#ifdef USE_NETCDF4
static int parsefilterflag(const char* sdata0, Specialdata* special);
static int parsecodecsflag(const char* sdata0, Specialdata* special);
#ifdef GENDEBUG1
static void printfilters(int nfilters, NC_ParsedFilterSpec** filters);
#endif
#endif
int yylex(void);
#ifndef NO_STDARG
static void yyerror(const char *fmt, ...);
#else
static void yyerror(fmt,va_alist) const char* fmt; va_dcl;
#endif
/* Extern */
extern int lex_init(void);
%}
/* DECLARATIONS */
%union {
Symbol* sym;
unsigned long size; /* allow for zero size to indicate e.g. UNLIMITED*/
long mark; /* track indices into the sequence*/
int nctype; /* for tracking attribute list type*/
Datalist* datalist;
NCConstant* constant;
}
%token <sym>
NC_UNLIMITED_K /* keyword for unbounded record dimension */
CHAR_K /* keyword for char datatype */
BYTE_K /* keyword for byte datatype */
SHORT_K /* keyword for short datatype */
INT_K /* keyword for int datatype */
FLOAT_K /* keyword for float datatype */
DOUBLE_K /* keyword for double datatype */
UBYTE_K /* keyword for unsigned byte datatype */
USHORT_K /* keyword for unsigned short datatype */
UINT_K /* keyword for unsigned int datatype */
INT64_K /* keyword for long long datatype */
UINT64_K /* keyword for unsigned long long datatype */
STRING_K /* keyword for string datatype */
IDENT /* name for a dimension, variable, or attribute */
TERMSTRING /* terminal string */
CHAR_CONST /* char constant (not ever generated by ncgen.l) */
BYTE_CONST /* byte constant */
SHORT_CONST /* short constant */
INT_CONST /* int constant */
INT64_CONST /* long long constant */
UBYTE_CONST /* unsigned byte constant */
USHORT_CONST /* unsigned short constant */
UINT_CONST /* unsigned int constant */
UINT64_CONST /* unsigned long long constant */
FLOAT_CONST /* float constant */
DOUBLE_CONST/* double constant */
DIMENSIONS /* keyword starting dimensions section, if any */
VARIABLES /* keyword starting variables section, if any */
NETCDF /* keyword declaring netcdf name */
DATA /* keyword starting data section, if any */
TYPES
COMPOUND
ENUM
OPAQUE_ /* 'OPAQUE' apparently conflicts with HDF4 code */
OPAQUESTRING /* 0x<even number of hexdigits> */
GROUP
PATH /* / or (/IDENT)+(.IDENT)? */
FILLMARKER /* "_" as opposed to the attribute */
NIL /* NIL */
_FILLVALUE
_FORMAT
_STORAGE
_CHUNKSIZES
_DEFLATELEVEL
_SHUFFLE
_ENDIANNESS
_NOFILL
_FLETCHER32
_NCPROPS
_ISNETCDF4
_SUPERBLOCK
_FILTER
_CODECS
DATASETID
%type <sym> ident typename primtype dimd varspec
attrdecl enumid path dimref fielddim fieldspec
%type <sym> typeref
%type <sym> varref
%type <sym> ambiguous_ref
%type <mark> enumidlist fieldlist fields varlist dimspec dimlist field
fielddimspec fielddimlist
%type <constant> dataitem constdata constint conststring constbool
%type <constant> simpleconstant function econstref
%type <datalist> datalist intlist datalist1 datalist0 arglist
%start ncdesc /* start symbol for grammar */
%%
/* RULES */
ncdesc: NETCDF
datasetid
rootgroup
{if (error_count > 0) YYABORT;}
;
datasetid: DATASETID {createrootgroup(datasetname);};
rootgroup: '{'
groupbody
subgrouplist
'}';
/* 2/3/08 - Allow group body with only attributes. (H/T John Storrs). */
groupbody:
attrdecllist
typesection /* Type definitions */
dimsection /* dimension declarations */
vasection /* variable and attribute declarations */
datasection /* data for variables within the group */
;
subgrouplist: /*empty*/ | subgrouplist namedgroup;
namedgroup: GROUP ident '{'
{
Symbol* id = $2;
markcdf4("Group specification");
if(creategroup(id) == NULL)
yyerror("duplicate group declaration within parent group for %s",
id->name);
}
groupbody
subgrouplist
{listpop(groupstack);}
'}'
attrdecllist
;
typesection: /* empty */
| TYPES {}
| TYPES typedecls
{markcdf4("Type specification");}
;
typedecls: type_or_attr_decl | typedecls type_or_attr_decl ;
typename: ident
{ /* Use when defining a type */
$1->objectclass = NC_TYPE;
if(dupobjectcheck(NC_TYPE,$1))
yyerror("duplicate type declaration for %s",
$1->name);
listpush(typdefs,(void*)$1);
}
;
type_or_attr_decl: typedecl {} | attrdecl ';' {} ;
typedecl:
enumdecl optsemicolon
| compounddecl optsemicolon
| vlendecl optsemicolon
| opaquedecl optsemicolon
;
optsemicolon: /*empty*/ | ';' ;
enumdecl: primtype ENUM typename
'{' enumidlist '}'
{
int i;
addtogroup($3); /* sets prefix*/
$3->objectclass=NC_TYPE;
$3->subclass=NC_ENUM;
$3->typ.basetype=$1;
$3->typ.size = $1->typ.size;
$3->typ.alignment = $1->typ.alignment;
stackbase=$5;
stacklen=listlength(stack);
$3->subnodes = listnew();
/* Variety of field fixups*/
/* 1. add in the enum values*/
/* 2. make this type be their container*/
/* 3. make constant names visible in the group*/
/* 4. set field basetype to be same as enum basetype*/
for(i=stackbase;i<stacklen;i++) {
Symbol* eid = (Symbol*)listget(stack,i);
assert(eid->subclass == NC_ECONST);
addtogroup(eid);
listpush($3->subnodes,(void*)eid);
eid->container = $3;
eid->typ.basetype = $3->typ.basetype;
}
listsetlength(stack,stackbase);/* remove stack nodes*/
}
;
enumidlist: enumid
{$$=listlength(stack); listpush(stack,(void*)$1);}
| enumidlist ',' enumid
{
int i;
$$=$1;
/* check for duplicates*/
stackbase=$1;
stacklen=listlength(stack);
for(i=stackbase;i<stacklen;i++) {
Symbol* elem = (Symbol*)listget(stack,i);
if(strcmp($3->name,elem->name)==0)
yyerror("duplicate enum declaration for %s",
elem->name);
}
listpush(stack,(void*)$3);
}
;
enumid: ident '=' constint
{
$1->objectclass=NC_TYPE;
$1->subclass=NC_ECONST;
$1->typ.econst=$3;
$$=$1;
}
;
opaquedecl: OPAQUE_ '(' INT_CONST ')' typename
{
vercheck(NC_OPAQUE);
addtogroup($5); /*sets prefix*/
$5->objectclass=NC_TYPE;
$5->subclass=NC_OPAQUE;
$5->typ.typecode=NC_OPAQUE;
$5->typ.size=int32_val;
$5->typ.alignment=ncaux_class_alignment(NC_OPAQUE);
}
;
vlendecl: typeref '(' '*' ')' typename
{
Symbol* basetype = $1;
vercheck(NC_VLEN);
addtogroup($5); /*sets prefix*/
$5->objectclass=NC_TYPE;
$5->subclass=NC_VLEN;
$5->typ.basetype=basetype;
$5->typ.typecode=NC_VLEN;
$5->typ.size=VLENSIZE;
$5->typ.alignment=ncaux_class_alignment(NC_VLEN);
}
;
compounddecl: COMPOUND typename '{' fields '}'
{
int i,j;
vercheck(NC_COMPOUND);
addtogroup($2);
/* check for duplicate field names*/
stackbase=$4;
stacklen=listlength(stack);
for(i=stackbase;i<stacklen;i++) {
Symbol* elem1 = (Symbol*)listget(stack,i);
for(j=i+1;j<stacklen;j++) {
Symbol* elem2 = (Symbol*)listget(stack,j);
if(strcmp(elem1->name,elem2->name)==0) {
yyerror("duplicate field declaration for %s",elem1->name);
}
}
}
$2->objectclass=NC_TYPE;
$2->subclass=NC_COMPOUND;
$2->typ.basetype=NULL;
$2->typ.typecode=NC_COMPOUND;
$2->subnodes = listnew();
/* Add in the fields*/
for(i=stackbase;i<stacklen;i++) {
Symbol* fsym = (Symbol*)listget(stack,i);
fsym->container = $2;
listpush($2->subnodes,(void*)fsym);
}
listsetlength(stack,stackbase);/* remove stack nodes*/
}
;
fields: field ';' {$$=$1;}
| fields field ';' {$$=$1;}
;
field: typeref fieldlist
{
int i;
$$=$2;
stackbase=$2;
stacklen=listlength(stack);
/* process each field in the fieldlist*/
for(i=stackbase;i<stacklen;i++) {
Symbol* f = (Symbol*)listget(stack,i);
f->typ.basetype = $1;
}
}
;
primtype: CHAR_K { $$ = primsymbols[NC_CHAR]; }
| BYTE_K { $$ = primsymbols[NC_BYTE]; }
| SHORT_K { $$ = primsymbols[NC_SHORT]; }
| INT_K { $$ = primsymbols[NC_INT]; }
| FLOAT_K { $$ = primsymbols[NC_FLOAT]; }
| DOUBLE_K{ $$ = primsymbols[NC_DOUBLE]; }
| UBYTE_K { vercheck(NC_UBYTE); $$ = primsymbols[NC_UBYTE]; }
| USHORT_K { vercheck(NC_USHORT); $$ = primsymbols[NC_USHORT]; }
| UINT_K { vercheck(NC_UINT); $$ = primsymbols[NC_UINT]; }
| INT64_K { vercheck(NC_INT64); $$ = primsymbols[NC_INT64]; }
| UINT64_K { vercheck(NC_UINT64); $$ = primsymbols[NC_UINT64]; }
| STRING_K { vercheck(NC_STRING); $$ = primsymbols[NC_STRING]; }
;
dimsection: /* empty */
| DIMENSIONS {}
| DIMENSIONS dimdecls {}
;
dimdecls: dim_or_attr_decl ';'
| dimdecls dim_or_attr_decl ';'
;
dim_or_attr_decl: dimdeclist {} | attrdecl {} ;
dimdeclist: dimdecl
| dimdeclist ',' dimdecl
;
dimdecl:
dimd '=' constint
{
$1->dim.declsize = (size_t)extractint($3);
#ifdef GENDEBUG1
fprintf(stderr,"dimension: %s = %llu\n",$1->name,(unsigned long long)$1->dim.declsize);
#endif
reclaimconstant($3);
}
| dimd '=' NC_UNLIMITED_K
{
$1->dim.declsize = NC_UNLIMITED;
$1->dim.isunlimited = 1;
#ifdef GENDEBUG1
fprintf(stderr,"dimension: %s = UNLIMITED\n",$1->name);
#endif
}
;
dimd: ident
{
$1->objectclass=NC_DIM;
if(dupobjectcheck(NC_DIM,$1))
yyerror( "Duplicate dimension declaration for %s",
$1->name);
addtogroup($1);
$$=$1;
listpush(dimdefs,(void*)$1);
}
;
vasection: /* empty */
| VARIABLES {}
| VARIABLES vadecls {}
;
vadecls: vadecl_or_attr ';'
| vadecls vadecl_or_attr ';'
;
vadecl_or_attr: vardecl {} | attrdecl {} ;
vardecl: typeref varlist
{
int i;
stackbase=$2;
stacklen=listlength(stack);
/* process each variable in the varlist*/
for(i=stackbase;i<stacklen;i++) {
Symbol* sym = (Symbol*)listget(stack,i);
sym->objectclass = NC_VAR;
if(dupobjectcheck(NC_VAR,sym)) {
yyerror("Duplicate variable declaration for %s",
sym->name);
} else {
sym->typ.basetype = $1;
addtogroup(sym);
listpush(vardefs,(void*)sym);
}
}
listsetlength(stack,stackbase);/* remove stack nodes*/
}
;
varlist: varspec
{$$=listlength(stack);
listpush(stack,(void*)$1);
}
| varlist ',' varspec
{$$=$1; listpush(stack,(void*)$3);}
;
varspec: ident dimspec
{
int i;
Dimset dimset;
Symbol* var = $1; /* for debugging */
stacklen=listlength(stack);
stackbase=$2;
count = stacklen - stackbase;
if(count >= NC_MAX_VAR_DIMS) {
yyerror("%s has too many dimensions",$1->name);
count = NC_MAX_VAR_DIMS - 1;
stacklen = stackbase + count;
}
dimset.ndims = count;
/* extract the actual dimensions*/
if(dimset.ndims > 0) {
for(i=0;i<count;i++) {
Symbol* dsym = (Symbol*)listget(stack,stackbase+i);
dimset.dimsyms[i] = dsym;
}
var->typ.dimset = dimset;
}
var->typ.basetype = NULL; /* not yet known*/
var->objectclass=NC_VAR;
listsetlength(stack,stackbase);/* remove stack nodes*/
$$ = var;
}
;
dimspec: /* empty */ {$$=listlength(stack);}
| '(' dimlist ')' {$$=$2;}
;
dimlist: dimref {$$=listlength(stack); listpush(stack,(void*)$1);}
| dimlist ',' dimref
{$$=$1; listpush(stack,(void*)$3);}
;
dimref: path
{Symbol* dimsym = $1;
dimsym->objectclass = NC_DIM;
/* Find the actual dimension*/
dimsym = locate(dimsym);
if(dimsym == NULL) {
derror("Undefined or forward referenced dimension: %s",$1->name);
YYABORT;
}
$$=dimsym;
}
;
fieldlist:
fieldspec
{$$=listlength(stack);
listpush(stack,(void*)$1);
}
| fieldlist ',' fieldspec
{$$=$1; listpush(stack,(void*)$3);}
;
fieldspec:
ident fielddimspec
{
int i;
Dimset dimset;
stackbase=$2;
stacklen=listlength(stack);
count = stacklen - stackbase;
if(count >= NC_MAX_VAR_DIMS) {
yyerror("%s has too many dimensions",$1->name);
count = NC_MAX_VAR_DIMS - 1;
stacklen = stackbase + count;
}
dimset.ndims = count;
if(count > 0) {
/* extract the actual dimensions*/
for(i=0;i<count;i++) {
Symbol* dsym = (Symbol*)listget(stack,stackbase+i);
dimset.dimsyms[i] = dsym;
}
$1->typ.dimset = dimset;
}
$1->typ.basetype = NULL; /* not yet known*/
$1->objectclass=NC_TYPE;
$1->subclass=NC_FIELD;
listsetlength(stack,stackbase);/* remove stack nodes*/
$$ = $1;
}
;
fielddimspec: /* empty */ {$$=listlength(stack);}
| '(' fielddimlist ')' {$$=$2;}
;
fielddimlist:
fielddim {$$=listlength(stack); listpush(stack,(void*)$1);}
| fielddimlist ',' fielddim
{$$=$1; listpush(stack,(void*)$3);}
;
fielddim:
UINT_CONST
{ /* Anonymous integer dimension.
Can only occur in type definitions*/
char anon[32];
sprintf(anon,"const%u",uint32_val);
$$ = install(anon);
$$->objectclass = NC_DIM;
$$->dim.isconstant = 1;
$$->dim.declsize = uint32_val;
}
| INT_CONST
{ /* Anonymous integer dimension.
Can only occur in type definitions*/
char anon[32];
if(int32_val <= 0) {
derror("field dimension must be positive");
YYABORT;
}
sprintf(anon,"const%d",int32_val);
$$ = install(anon);
$$->objectclass = NC_DIM;
$$->dim.isconstant = 1;
$$->dim.declsize = int32_val;
}
;
/* Use this when referencing defined objects */
varref:
ambiguous_ref
{Symbol* vsym = $1;
if(vsym->objectclass != NC_VAR) {
derror("Undefined or forward referenced variable: %s",vsym->name);
YYABORT;
}
$$=vsym;
}
;
typeref:
ambiguous_ref
{Symbol* tsym = $1;
if(tsym->objectclass != NC_TYPE) {
derror("Undefined or forward referenced type: %s",tsym->name);
YYABORT;
}
$$=tsym;
}
;
ambiguous_ref:
path
{Symbol* tvsym = $1; Symbol* sym;
/* disambiguate*/
tvsym->objectclass = NC_VAR;
sym = locate(tvsym);
if(sym == NULL) {
tvsym->objectclass = NC_TYPE;
sym = locate(tvsym);
if(tvsym == NULL) {
derror("Undefined or forward referenced name: %s",$1->name);
YYABORT;
} else tvsym = sym;
} else tvsym = sym;
if(tvsym == NULL) {
derror("Undefined name (line %d): %s",$1->lineno,$1->name);
YYABORT;
}
$$=tvsym;
}
| primtype {$$=$1;}
;
/* Use this for all attribute decls */
/* Global vs var-specific will be separated in makeattribute */
/* Watch out; this is left recursive */
attrdecllist: /*empty*/ {} | attrdecl ';' attrdecllist {} ;
attrdecl:
':' _NCPROPS '=' conststring
{$$ = makespecial(_NCPROPS_FLAG,NULL,NULL,(void*)$4,ISCONST);}
| ':' _ISNETCDF4 '=' constbool
{$$ = makespecial(_ISNETCDF4_FLAG,NULL,NULL,(void*)$4,ISCONST);}
| ':' _SUPERBLOCK '=' constint
{$$ = makespecial(_SUPERBLOCK_FLAG,NULL,NULL,(void*)$4,ISCONST);}
| ':' ident '=' datalist
{ $$=makeattribute($2,NULL,NULL,$4,ATTRGLOBAL);}
| typeref ambiguous_ref ':' ident '=' datalist
{Symbol* tsym = $1; Symbol* vsym = $2; Symbol* asym = $4;
if(vsym->objectclass == NC_VAR) {
$$=makeattribute(asym,vsym,tsym,$6,ATTRVAR);
} else {
derror("Doubly typed attribute: %s",asym->name);
YYABORT;
}
}
| ambiguous_ref ':' ident '=' datalist
{Symbol* sym = $1; Symbol* asym = $3;
if(sym->objectclass == NC_VAR) {
$$=makeattribute(asym,sym,NULL,$5,ATTRVAR);
} else if(sym->objectclass == NC_TYPE) {
$$=makeattribute(asym,NULL,sym,$5,ATTRGLOBAL);
} else {
derror("Attribute prefix not a variable or type: %s",asym->name);
YYABORT;
}
}
| ambiguous_ref ':' _FILLVALUE '=' datalist
{$$ = makespecial(_FILLVALUE_FLAG,$1,NULL,(void*)$5,ISLIST);}
| typeref ambiguous_ref ':' _FILLVALUE '=' datalist
{$$ = makespecial(_FILLVALUE_FLAG,$2,$1,(void*)$6,ISLIST);}
| ambiguous_ref ':' _STORAGE '=' conststring
{$$ = makespecial(_STORAGE_FLAG,$1,NULL,(void*)$5,ISCONST);}
| ambiguous_ref ':' _CHUNKSIZES '=' intlist
{$$ = makespecial(_CHUNKSIZES_FLAG,$1,NULL,(void*)$5,ISLIST);}
| ambiguous_ref ':' _FLETCHER32 '=' constbool
{$$ = makespecial(_FLETCHER32_FLAG,$1,NULL,(void*)$5,ISCONST);}
| ambiguous_ref ':' _DEFLATELEVEL '=' constint
{$$ = makespecial(_DEFLATE_FLAG,$1,NULL,(void*)$5,ISCONST);}
| ambiguous_ref ':' _SHUFFLE '=' constbool
{$$ = makespecial(_SHUFFLE_FLAG,$1,NULL,(void*)$5,ISCONST);}
| ambiguous_ref ':' _ENDIANNESS '=' conststring
{$$ = makespecial(_ENDIAN_FLAG,$1,NULL,(void*)$5,ISCONST);}
| ambiguous_ref ':' _FILTER '=' conststring
{$$ = makespecial(_FILTER_FLAG,$1,NULL,(void*)$5,ISCONST);}
| ambiguous_ref ':' _CODECS '=' conststring
{$$ = makespecial(_CODECS_FLAG,$1,NULL,(void*)$5,ISCONST);}
| ambiguous_ref ':' _NOFILL '=' constbool
{$$ = makespecial(_NOFILL_FLAG,$1,NULL,(void*)$5,ISCONST);}
| ':' _FORMAT '=' conststring
{$$ = makespecial(_FORMAT_FLAG,NULL,NULL,(void*)$4,ISCONST);}
;
path:
ident
{
$$=$1;
$1->ref.is_ref=1;
$1->is_prefixed=0;
setpathcurrent($1);
}
| PATH
{
$$=$1;
$1->ref.is_ref=1;
$1->is_prefixed=1;
/* path is set in ncgen.l*/
}
;
datasection: /* empty */
| DATA {}
| DATA datadecls {}
;
datadecls: datadecl ';'
| datadecls datadecl ';'
;
datadecl: varref '=' datalist
{$1->data = $3;}
;
datalist:
datalist0 {$$ = $1;}
| datalist1 {$$ = $1;}
;
datalist0:
/*empty*/ {$$ = builddatalist(0);}
;
datalist1: /* Must have at least 1 element */
dataitem {$$ = const2list($1);}
| datalist ',' dataitem
{dlappend($1,($3)); $$=$1; }
;
dataitem:
constdata {$$=$1;}
| '{' datalist '}' {$$=builddatasublist($2);}
;
constdata:
simpleconstant {$$=$1;}
| OPAQUESTRING {$$=makeconstdata(NC_OPAQUE);}
| FILLMARKER {$$=makeconstdata(NC_FILLVALUE);}
| NIL {$$=makeconstdata(NC_NIL);}
| econstref {$$=$1;}
| function
;
econstref:
path {$$ = makeenumconstref($1);}
;
function:
ident '(' arglist ')' {$$=evaluate($1,$3);}
;
arglist:
simpleconstant
{$$ = const2list($1);}
| arglist ',' simpleconstant
{dlappend($1,($3)); $$=$1;}
;
simpleconstant:
CHAR_CONST {$$=makeconstdata(NC_CHAR);} /* never used apparently*/
| BYTE_CONST {$$=makeconstdata(NC_BYTE);}
| SHORT_CONST {$$=makeconstdata(NC_SHORT);}
| INT_CONST {$$=makeconstdata(NC_INT);}
| INT64_CONST {$$=makeconstdata(NC_INT64);}
| UBYTE_CONST {$$=makeconstdata(NC_UBYTE);}
| USHORT_CONST {$$=makeconstdata(NC_USHORT);}
| UINT_CONST {$$=makeconstdata(NC_UINT);}
| UINT64_CONST {$$=makeconstdata(NC_UINT64);}
| FLOAT_CONST {$$=makeconstdata(NC_FLOAT);}
| DOUBLE_CONST {$$=makeconstdata(NC_DOUBLE);}
| TERMSTRING {$$=makeconstdata(NC_STRING);}
;
intlist:
constint {$$ = const2list($1);}
| intlist ',' constint {$$=$1; dlappend($1,($3));}
;
constint:
INT_CONST
{$$=makeconstdata(NC_INT);}
| UINT_CONST
{$$=makeconstdata(NC_UINT);}
| INT64_CONST
{$$=makeconstdata(NC_INT64);}
| UINT64_CONST
{$$=makeconstdata(NC_UINT64);}
;
conststring:
TERMSTRING {$$=makeconstdata(NC_STRING);}
;
constbool:
conststring {$$=$1;}
| constint {$$=$1;}
/* End OF RULES */
/* Push all idents thru here*/
ident:
IDENT {$$=$1;}
;
%%
#ifndef NO_STDARG
static void
yyerror(const char *fmt, ...)
#else
static void
yyerror(fmt,va_alist) const char* fmt; va_dcl
#endif
{
va_list argv;
va_start(argv,fmt);
(void)fprintf(stderr,"%s: %s line %d: ", progname, cdlname, lineno);
vderror(fmt,argv);
va_end(argv);
}
/* undefine yywrap macro, in case we are using bison instead of yacc */
#ifdef yywrap
#undef yywrap
#endif
static int
ncgwrap(void) /* returns 1 on EOF if no more input */
{
return 1;
}
/* get lexical input routine generated by lex */
#include "ncgenl.c"
/* Really should init our data within this file */
void
parse_init(void)
{
int i;
opaqueid = 0;
arrayuid = 0;
symlist = listnew();
stack = listnew();
groupstack = listnew();
consttype = NC_NAT;
grpdefs = listnew();
dimdefs = listnew();
attdefs = listnew();
gattdefs = listnew();
xattdefs = listnew();
typdefs = listnew();
vardefs = listnew();
tmp = listnew();
/* Create the primitive types */
for(i=NC_NAT+1;i<=NC_STRING;i++) {
primsymbols[i] = makeprimitivetype(i);
}
lex_init();
}
static Symbol*
makeprimitivetype(nc_type nctype)
{
Symbol* sym = install(primtypenames[nctype]);
sym->objectclass=NC_TYPE;
sym->subclass=NC_PRIM;
sym->nc_id = nctype;
sym->typ.typecode = nctype;
sym->typ.size = ncsize(nctype);
sym->typ.nelems = 1;
sym->typ.alignment = ncaux_class_alignment(nctype);
/* Make the basetype circular so we can always ask for it */
sym->typ.basetype = sym;
sym->prefix = listnew();
return sym;
}
/* Symbol table operations for ncgen tool */
/* install sname in symbol table even if it is already there */
Symbol*
install(const char *sname)
{
return installin(sname,currentgroup());
}
Symbol*
installin(const char *sname, Symbol* grp)
{
Symbol* sp;
sp = (Symbol*) ecalloc (sizeof (struct Symbol));
sp->name = nulldup(sname);
sp->lineno = lineno;
sp->location = grp;
sp->container = grp;
listpush(symlist,sp);
return sp;
}
static Symbol*
currentgroup(void)
{
if(listlength(groupstack) == 0) return rootgroup;
return (Symbol*)listtop(groupstack);
}
static Symbol*
createrootgroup(const char* dataset)