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gaddes.c
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gaddes.c
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/* Copyright (c) 1987-1995 by Brian Doty. All Rights Reserved.
See file COPYRIGHT for liability information.
Permission is granted for usage of source code on an individual
basis only. You are in violation of copyright law if you have
possession of this source code without specific permission from
Brian Doty. This source code may not be redistributed in any way,
in whole or in part. You may use this source code to:
- understand GrADs functionality
- make minor enhancements to the GrADS program
- correct bugs in the GrADs program
All other uses ARE PROHIBITED, without specific written permission
for such use. You agree that if you make any modifications to the
source code, you will provide such modifications to Brian Doty for
possible inclusion into the distributed version of GrADS (attribution
will be made if requested). */
#include <stdio.h>
#include <math.h>
#include <ctype.h>
#include <malloc.h>
#include <string.h>
#include "grads.h"
/*mf 961205 --- expose Mike Fiorino's global struct to these routines for 365 day calandars mf*/
extern struct gamfcmn mfcmn;
/*mf 961205 --- expose Mike Fiorino's global struct to these routines for 365 day calandars mf*/
static char pout[512];
FILE *descr; /* File descriptor pointer */
FILE *pdfi; /* File descriptor for pdef file */
void ll2eg (int , int, float *, float, float, float *, float *, float *) ;
void ll2pse(int, int, float *, float, float, float *, float *);
void ll2ops (float *, float , float , float *, float *) ;
/* Read a GrADS data descriptor file and fill in the information
into a gafile structure. The gafile structure should be
allocated and must be initialized by getpfi. If this routine
returns an error, release the pfi structure and allocated
storage via frepfi. mflag indicates whether to read the
stnmap/index file; if this routine is being called to
preprocess the dd file then this flag should be 0. */
int gaddes (char *name, struct gafile *pfi, int mflag) {
struct gavar *pvar;
struct dt tdef,tdefi,dt1,dt2;
struct gaindx *pindx;
float *vals;
int size,rc,len,swpflg,cnt;
char rec[512], mrec[512], *ch, *dn, *pos, *sname ; /*mf mf*/
int flgs[8],cflg,i,j,err,hdrb,trlb,mflflg,crayflg=0;
int mcnt,maxlv,maxct;
int levs,acum,acumvz,fpos,recacm;
float temp,v1,v2;
FILE *mfile;
char pdefnm[256];
int pdefop1, pdefop2;
/*mf .... mf*/
int nzstride=0,first=1;
int levsua=0,acumstride=0;
unsigned char vermap;
int idum;
float fdum;
unsigned char urec[4];
int diag=0;
/*mf .... mf*/
static char *errs[9] = {"XDEF","YDEF","ZDEF","TDEF","UNDEF",
"DSET","VARS","TITLE","DTYPE"};
#if GRADS_CDUNIF == 1
mfcmn.fullyear=1; /*mf --- define here vice grads.c for cdunif.c mf*/
#endif
hdrb = 0;
trlb = 0;
pdfi = NULL;
mflflg = 0; /* map file not open */
pfi->mfile = NULL;
mcnt = -1;
descr = fopen (name, "r");
/* default suffix of .ctl */
sname=NULL;
if (descr == NULL) {
sname = (char *)malloc(strlen(name)+5);
if(sname == NULL) {
gaprnt(0,"malloc error in creating date descriptor file name\n");
return(1);
}
for(i=0;i<=strlen(name);i++) *(sname+i)=*(name+i);
strcat(sname,".ctl");
descr = fopen (sname, "r");
}
if (descr==NULL) {
gaprnt (0,"Open Error: Can't open description file\n");
return(1);
}
if(sname !=NULL) {
getwrd (pfi->dnam,sname,256);
free(sname);
} else {
getwrd (pfi->dnam,name,256);
}
/* initialize error flags */
for (i=0;i<8;i++) flgs[i] = 1;
/*mf initialize the calendar to standard and cray_ieee to 0 mf*/
pfi->calendar=0;
pfi->cray_ieee=0;
/*mf---------mf*/
/* parse the dd file */
while (fgets(rec,512,descr)!=NULL) {
strcpy (mrec,rec);
lowcas(rec);
if ( (cmpwrd("*",rec)) || !isalnum(rec[0]) ) {
cflg = 1;
} else if (cmpwrd("byteswapped",rec)) {
pfi->bswap = 1;
} else if (cmpwrd("fileheader",rec)) {
if ( (ch=nxtwrd(rec))==NULL ) {
gaprnt (1,"Description file warning: Missing fileheader length\n");
} else {
ch = intprs(ch,&(pfi->fhdr));
if (ch==NULL) {
gaprnt (1,"Fileheader record invalid\n");
pfi->fhdr = 0;
}
}
} else if (cmpwrd("xyheader",rec)) {
if ( (ch=nxtwrd(rec))==NULL ) {
gaprnt (1,"Description file warning: Missing xy grid header length\n");
} else {
ch = intprs(ch,&(pfi->xyhdr));
if (ch==NULL) {
gaprnt (1,"xy grid header length invalid\n");
pfi->xyhdr = 0;
} else {
pfi->xyhdr = pfi->xyhdr / sizeof(float);
}
}
} else if (cmpwrd("theader",rec)) {
if ( (ch=nxtwrd(rec))==NULL ) {
gaprnt (1,"Description file warning: Missing time chunk header length\n");
} else {
ch = intprs(ch,&(pfi->thdr));
if (ch==NULL) {
gaprnt (1,"time chunk grid header length invalid\n");
pfi->thdr = 0;
} else {
pfi->thdr = pfi->thdr / sizeof(float);
}
}
} else if (cmpwrd("format",rec) || cmpwrd("options",rec)) {
if ( (ch=nxtwrd(rec))==NULL ) {
gaprnt (1,"Description file warning: Missing options keyword\n");
} else {
while (ch!=NULL) {
if (cmpwrd("sequential",ch)) pfi->seqflg = 1;
else if (cmpwrd("yrev",ch)) pfi->yrflg = 1;
else if (cmpwrd("zrev",ch)) pfi->zrflg = 1;
else if (cmpwrd("template",ch)) pfi->tmplat = 1;
else if (cmpwrd("byteswapped",ch)) pfi->bswap = 1;
else if (cmpwrd("cray_32bit_ieee",ch) && GRADS_CRAY) pfi->cray_ieee = 1;
else if (cmpwrd("cray_32bit_ieee",ch) && !GRADS_CRAY) pfi->cray_ieee = 0;
else if (cmpwrd("365_day_calendar",ch)) pfi->calendar=1;
else if (cmpwrd("big_endian",ch)) {
if (!BYTEORDER) pfi->bswap = 1;
}
else if (cmpwrd("little_endian",ch)) {
if (BYTEORDER) pfi->bswap = 1;
}
else {
gaprnt (0,"Open Error: Data file type invalid\n");
goto err9;
}
ch = nxtwrd(ch);
}
}
} else if (cmpwrd("trailerbytes",rec)) {
if ( (ch=nxtwrd(rec))==NULL ) {
gaprnt (1,"Trailerbytes record invalid\n");
} else {
ch = intprs(ch,&trlb);
if (ch==NULL) {
gaprnt (1,"Trailerbytes record invalid\n");
trlb = 0;
} else {
trlb = trlb/4;
}
}
} else if (cmpwrd("headerbytes",rec)) {
if ( (ch=nxtwrd(rec))==NULL ) {
gaprnt (1,"Headerbytes record invalid\n");
} else {
ch = intprs(ch,&hdrb);
if (ch==NULL) {
gaprnt (1,"Headerbytes record invalid\n");
hdrb = 0;
} else {
hdrb = hdrb/4;
}
}
} else if (cmpwrd("dtype",rec)) {
if ( (ch=nxtwrd(rec))==NULL ) {
gaprnt (1,"Description file warning: Missing data type\n");
gaprnt (1," Assuming data file type is grid\n");
}
if (cmpwrd("station",ch)) {
pfi->type = 2;
flgs[0] = 0;
flgs[1] = 0;
flgs[2] = 0;
} else if (cmpwrd("grib",ch)) {
pfi->idxflg = 1;
if ( (ch=nxtwrd(ch))!=NULL ) {
if ( intprs(ch,&(pfi->grbgrd))==NULL) {
gaprnt (1,"Description file warning: Invalid GRIB option\n");
pfi->grbgrd = -999;
}
}
} else {
gaprnt (0,"Open Error: Data file type invalid\n");
goto err9;
}
} else if (cmpwrd("title",rec)) {
if ( (ch=nxtwrd(mrec))==NULL ) {
gaprnt (1,"Description file warning: Missing title string\n");
} else {
getstr (pfi->title,ch,79);
flgs[7] = 0;
}
} else if (cmpwrd("dset",rec)) {
ch = nxtwrd(mrec);
if (ch==NULL) {
gaprnt (0,"Open Error: Data file name is missing\n");
goto err9;
}
if (*ch=='^' || *ch=='$') {
fnmexp (pfi->name,ch,name);
} else {
getwrd (pfi->name,ch,256);
}
flgs[5] = 0;
} else if (cmpwrd("stnmap",rec) || cmpwrd("index",rec)) {
/*mf -----
map file processing -- gribmap
-----mf*/
if (cmpwrd("index",rec)) pfi->idxflg = 1;
ch = nxtwrd(mrec);
if (ch==NULL) {
gaprnt (0,"Open Error: Station or Index Map file name is missing\n");
goto err9;
}
if (*ch=='^' || *ch=='$') {
fnmexp (pout, ch, name);
} else {
getwrd (pout,ch,100);
}
len = 0;
while (*(pout+len)) len++;
pfi->mnam = (char *)malloc(len+3);
if (pfi->mnam==NULL) goto err8;
strcpy (pfi->mnam,pout);
if (mflag) {
mfile = fopen (pout, "rb");
if (mfile==NULL) {
gaprnt (0,"Open Error: Can't open Station/Index map file ");
gaprnt (0,pout);
gaprnt (0,"\n");
goto err9;
}
mflflg = 1;
swpflg = 0;
/*---
GRIB data - load the map
---*/
if (pfi->idxflg) {
pindx = (struct gaindx *)malloc(sizeof(struct gaindx));
if (pindx==NULL) goto err8;
pfi->pindx = pindx;
/*
check the version number
*/
fseek(mfile,1,0);
fread(&vermap,sizeof(unsigned char),1,mfile);
if(diag) printf("ddd gribmap vermap =%d\n",vermap);
if(vermap == 2) {
fseek(mfile,2,0);
fread(mrec,sizeof(unsigned char),4,mfile);
pindx->hinum=gagby(mrec,0,4);
if(diag) printf("ddd hinum = %d\n",pindx->hinum);
fread(mrec,sizeof(unsigned char),4,mfile);
pindx->hfnum=gagby(mrec,0,4);
if(diag) printf("ddd hfnum = %d\n",pindx->hfnum);
fread(mrec,sizeof(unsigned char),4,mfile);
pindx->intnum=gagby(mrec,0,4);
if(diag) printf("ddd intnum = %d\n",pindx->intnum);
fread(mrec,sizeof(unsigned char),4,mfile);
pindx->fltnum=gagby(mrec,0,4);
if(diag) printf("ddd fltnum = %d\n",pindx->fltnum);
/* skip the begining time struct info */
fread(mrec,sizeof(unsigned char),7,mfile);
pindx->hipnt = NULL;
pindx->hfpnt = NULL;
pindx->intpnt = NULL;
pindx->fltpnt = NULL;
if (pindx->hinum>0) {
pindx->hipnt = (int *)malloc(sizeof(int)*pindx->hinum);
if (pindx->hipnt==NULL) goto err8;
for(i=0;i<pindx->hinum;i++) {
fread(mrec,sizeof(unsigned char),4,mfile);
idum=gagby(mrec,0,4);
if(gagbb(mrec,0,1)) idum=-idum;
*(pindx->hipnt+i)=idum;
if(diag) printf("ddd 1 i = %d pindx->hipnt = %d\n",i,idum);
}
}
if (pindx->hfnum>0) {
pindx->hfpnt = (float *)malloc(sizeof(float)*pindx->hfnum);
if (pindx->hfpnt==NULL) goto err8;
fread (pindx->hfpnt,sizeof(float),pindx->hfnum,mfile);
}
if (pindx->intnum>0) {
pindx->intpnt = (int *)malloc(sizeof(int)*pindx->intnum);
if (pindx->intpnt==NULL) goto err8;
for(i=0;i<pindx->intnum;i++) {
fread(mrec,sizeof(unsigned char),4,mfile);
idum=gagby(mrec,0,4);
if(gagbb(mrec,0,1)) idum=-gagbb(mrec,1,31);
*(pindx->intpnt+i)=idum;
if(diag) printf("ddd 2 i = %d pindx->intpnt = %d\n",i,idum);
}
}
if (pindx->fltnum>0) {
pindx->fltpnt = (float *)malloc(sizeof(float)*pindx->fltnum);
if (pindx->fltpnt==NULL) goto err8;
for(i=0;i<pindx->fltnum;i++) {
fread(urec,sizeof(unsigned char),4,mfile);
fdum=ibm2flt(urec);
*(pindx->fltpnt+i)=fdum;
if(diag) printf("ddd 3 i = %d pindx->fltpnt = %g\n",i,fdum);
}
}
} else {
fseek (mfile,0L,0);
fread (pindx,sizeof(struct gaindx),1,mfile);
if (pindx->type>>24 > 0) swpflg=1;
if (swpflg) gabswp((float *)pindx,5);
pindx->hipnt = NULL;
pindx->hfpnt = NULL;
pindx->intpnt = NULL;
pindx->fltpnt = NULL;
if (pindx->hinum>0) {
pindx->hipnt = (int *)malloc(sizeof(int)*pindx->hinum);
if (pindx->hipnt==NULL) goto err8;
fread (pindx->hipnt,sizeof(int),pindx->hinum,mfile);
if (swpflg) gabswp((float *)(pindx->hipnt),pindx->hinum);
}
if (pindx->hfnum>0) {
pindx->hfpnt = (float *)malloc(sizeof(float)*pindx->hfnum);
if (pindx->hfpnt==NULL) goto err8;
fread (pindx->hfpnt,sizeof(float),pindx->hfnum,mfile);
if (swpflg) gabswp(pindx->hfpnt,pindx->hfnum);
}
if (pindx->intnum>0) {
pindx->intpnt = (int *)malloc(sizeof(int)*pindx->intnum);
if (pindx->intpnt==NULL) goto err8;
fread (pindx->intpnt,sizeof(int),pindx->intnum,mfile);
if (swpflg) gabswp((float *)(pindx->intpnt),pindx->intnum);
}
if (pindx->fltnum>0) {
pindx->fltpnt = (float *)malloc(sizeof(float)*pindx->fltnum);
if (pindx->fltpnt==NULL) goto err8;
fread (pindx->fltpnt,sizeof(float),pindx->fltnum,mfile);
if (swpflg) gabswp(pindx->fltpnt,pindx->fltnum);
}
}
/*mf -----
map file processing -- stnmap
-----mf*/
} else {
/*mf version detection mf*/
fread(rec,1,16,mfile); /* minimum map file is 16 bytes */
vermap=1;
if(strncmp(rec,"GrADS_stnmapV002",16) == 0) {
vermap=2;
}
if(vermap == 2) {
fread(mrec,sizeof(unsigned char),4,mfile);
idum=gagby(mrec,0,4);
if(gagbb(mrec,0,1)) idum=-idum;
mcnt=idum;
fread(mrec,sizeof(unsigned char),4,mfile);
idum=gagby(mrec,0,4);
if(gagbb(mrec,0,1)) idum=-idum;
maxlv=idum;
pfi->tstrt = (int *)malloc(sizeof(int)*mcnt);
pfi->tcnt = (int *)malloc(sizeof(int)*mcnt);
for(i=0;i<mcnt;i++) {
fread(mrec,sizeof(unsigned char),4,mfile);
idum=gagby(mrec,0,4);
if(gagbb(mrec,0,1)) idum=-idum;
*(pfi->tstrt+i)=idum;
}
for(i=0;i<mcnt;i++) {
fread(mrec,sizeof(unsigned char),4,mfile);
idum=gagby(mrec,0,4);
if(gagbb(mrec,0,1)) idum=-idum;
*(pfi->tcnt+i)=idum;
}
} else if(vermap ==1) {
/* reposition and read two local ints for version 1 map*/
fseek (mfile,0L,0);
fread (&mcnt,sizeof(int),1,mfile);
fread (&maxlv,sizeof(int),1,mfile);
if (maxlv>>24 > 0) swpflg = 1;
if (swpflg) {
gabswp((float *)(&mcnt),1);
gabswp((float *)(&maxlv),1);
}
pfi->tstrt = (int *)malloc(sizeof(int)*mcnt);
pfi->tcnt = (int *)malloc(sizeof(int)*mcnt);
fread (pfi->tstrt,sizeof(int),mcnt,mfile);
fread (pfi->tcnt,sizeof(int),mcnt,mfile);
if (swpflg) {
gabswp((float *)pfi->tstrt,1);
gabswp((float *)pfi->tcnt,1);
}
pfi->mtype = 1;
}
fclose (mfile);
mflflg = 0;
}
} /* END OF mpfile check */
} else if (cmpwrd("toff",rec)) {
ch = nxtwrd(rec);
if (ch==NULL) {
gaprnt (0,"Open Error: Missing toff value\n");
goto err9;
}
pos = intprs(ch,&(pfi->tlpst));
if (pos==NULL || pfi->tlpst>=pfi->dnum[3]) {
gaprnt (0,"Open Error: Invalid toff value\n");
goto err9;
}
pfi->tlpflg = 1;
} else if (cmpwrd("undef",rec)) {
ch = nxtwrd(rec);
if (ch==NULL) {
gaprnt (0,"Open Error: Missing undef value\n");
goto err9;
}
pos = valprs(ch,&(pfi->undef));
if (pos==NULL) {
gaprnt (0,"Open Error: Invalid undef value\n");
goto err9;
}
if (SETMISS) {
pfi->ulow = fabs(pfi->undef/EPSILON);
pfi->uhi = pfi->undef + pfi->ulow;
pfi->ulow = pfi->undef - pfi->ulow;
}
flgs[4] = 0;
} else if (cmpwrd("pdef",rec)) {
if ( (ch = nxtwrd(rec)) == NULL) goto errm;
if ( (pos = intprs(ch,&(pfi->ppisiz)))==NULL) goto errm;
if ( (ch = nxtwrd(ch)) == NULL) goto errm;
if ( (pos = intprs(ch,&(pfi->ppjsiz)))==NULL) goto errm;
if ( (ch = nxtwrd(ch)) == NULL) goto errm;
if (cmpwrd("nps",ch)) {pfi->ppflag=1; pfi->ppwrot=1; cnt=4;}
else if (cmpwrd("sps",ch)) {pfi->ppflag=2; pfi->ppwrot=1; cnt=4;}
else if (cmpwrd("lcc",ch)) {pfi->ppflag=3; pfi->ppwrot=0; cnt=9;}
else if (cmpwrd("eta.u",ch)) {pfi->ppflag=4; pfi->ppwrot=1; cnt=4;}
else if (cmpwrd("pse",ch)) {pfi->ppflag=5; pfi->ppwrot=0; cnt=7;}
else if (cmpwrd("ops",ch)) {pfi->ppflag=6; pfi->ppwrot=0; cnt=8;}
else if (cmpwrd("bilin",ch)) {pfi->ppflag=7; pfi->ppwrot=1; cnt=0;}
else if (cmpwrd("file",ch)) {pfi->ppflag=8; pfi->ppwrot=1; cnt=1;}
else goto errm;
for (i=0; i<cnt; i++) {
if ( (ch = nxtwrd(ch)) == NULL) goto errm;
if ( (pos = valprs(ch,&(pfi->ppvals[i])))==NULL) goto errm;
}
pdefop1 = 0; pdefop2 = 0;
if (pfi->ppflag==8) {
i = (int)(pfi->ppvals[0]+0.1);
if (i<1 || i>8) goto errm;
}
if (pfi->ppflag==7 || pfi->ppflag==8) {
if ( (ch = nxtwrd(ch)) == NULL) goto errm;
if (cmpwrd("stream",ch)) pdefop1 = 1;
else if (cmpwrd("sequential",ch)) pdefop1 = 2;
else goto errm;
if ( (ch = nxtwrd(ch)) == NULL) goto errm;
if (cmpwrd("binary",ch)) pdefop2 = 1;
if (cmpwrd("binary-big",ch)) pdefop2 = 2;
if (cmpwrd("binary-little",ch)) pdefop2 = 3;
else if (cmpwrd("packed",ch)) pdefop2 = 4;
else goto errm;
if ( (ch = nxtwrd(ch)) == NULL) goto errm;
if (*ch=='^' || *ch=='$') {
fnmexp (pdefnm,ch,name);
} else {
getwrd (pdefnm,ch,256);
}
pdfi = fopen(pdefnm,"rb");
if (pdfi==NULL) {
gaprnt (0,"Error opening pdef file\n");
sprintf (pout, " File name is: %s\n",pdefnm);
gaprnt (0,pout);
goto errm;
}
}
} else if (cmpwrd("xdef",rec)) {
if (pfi->type == 2) continue;
if ( (ch = nxtwrd(rec)) == NULL) goto err1;
if ( (pos = intprs(ch,&(pfi->dnum[0])))==NULL) goto err1;
if (*pos!=' ') goto err1;
if ( (ch = nxtwrd(ch))==NULL) goto err2;
if (cmpwrd("linear",ch)) {
rc = deflin(ch, pfi, 0, 0);
if (rc==-1) goto err8;
if (rc) goto err9;
v2 = *(pfi->grvals[0]);
v1 = *(pfi->grvals[0]+1) + v2;
temp = v1+((float)(pfi->dnum[0]))*v2;
temp=temp-360.0;
if (fabs(temp-v1)<0.01) pfi->wrap = 1;
}
else if (cmpwrd("levels",ch)) {
if (pfi->dnum[0]<1) goto err7;
rc = deflev (ch, rec, pfi, 0);
if (rc==-1) goto err8;
if (rc) goto err9;
} else goto err2;
flgs[0] = 0;
} else if (cmpwrd("ydef",rec)) {
if (pfi->type == 2) continue;
if ( (ch = nxtwrd(rec)) == NULL) goto err1;
if ( (pos = intprs(ch,&(pfi->dnum[1])))==NULL) goto err1;
if (*pos!=' ') goto err1;
if ( (ch = nxtwrd(ch))==NULL) goto err2;
if (cmpwrd("linear",ch)) {
rc = deflin(ch, pfi, 1, 0);
if (rc==-1) goto err8;
if (rc) goto err9;
} else if (cmpwrd("levels",ch)) {
if (pfi->dnum[1]<1) goto err7;
rc = deflev (ch, rec, pfi, 1);
if (rc==-1) goto err8;
if (rc) goto err9;
} else if (cmpwrd("gausr40",ch)) {
if ( (ch = nxtwrd(ch))==NULL) goto err3;
if ( (pos = intprs(ch,&i))==NULL) goto err3;
pfi->grvals[1] = gagaus(i,pfi->dnum[1]);
if (pfi->grvals[1]==NULL) goto err9;
pfi->abvals[1] = pfi->grvals[1];
pfi->ab2gr[1] = lev2gr;
pfi->gr2ab[1] = gr2lev;
pfi->linear[1] = 0;
} else if (cmpwrd("mom32",ch)) {
if ( (ch = nxtwrd(ch))==NULL) goto err3;
if ( (pos = intprs(ch,&i))==NULL) goto err3;
pfi->grvals[1] = gamo32(i,pfi->dnum[1]);
if (pfi->grvals[1]==NULL) goto err9;
pfi->abvals[1] = pfi->grvals[1];
pfi->ab2gr[1] = lev2gr;
pfi->gr2ab[1] = gr2lev;
pfi->linear[1] = 0;
} else if (cmpwrd("gausr30",ch)) {
if ( (ch = nxtwrd(ch))==NULL) goto err3;
if ( (pos = intprs(ch,&i))==NULL) goto err3;
pfi->grvals[1] = gags30(i,pfi->dnum[1]);
if (pfi->grvals[1]==NULL) goto err9;
pfi->abvals[1] = pfi->grvals[1];
pfi->ab2gr[1] = lev2gr;
pfi->gr2ab[1] = gr2lev;
pfi->linear[1] = 0;
} else if (cmpwrd("gausr20",ch)) {
if ( (ch = nxtwrd(ch))==NULL) goto err3;
if ( (pos = intprs(ch,&i))==NULL) goto err3;
pfi->grvals[1] = gags20(i,pfi->dnum[1]);
if (pfi->grvals[1]==NULL) goto err9;
pfi->abvals[1] = pfi->grvals[1];
pfi->ab2gr[1] = lev2gr;
pfi->gr2ab[1] = gr2lev;
pfi->linear[1] = 0;
} else if (cmpwrd("gausr15",ch)) {
if ( (ch = nxtwrd(ch))==NULL) goto err3;
if ( (pos = intprs(ch,&i))==NULL) goto err3;
pfi->grvals[1] = gags15(i,pfi->dnum[1]);
if (pfi->grvals[1]==NULL) goto err9;
pfi->abvals[1] = pfi->grvals[1];
pfi->ab2gr[1] = lev2gr;
pfi->gr2ab[1] = gr2lev;
pfi->linear[1] = 0;
} else goto err2;
flgs[1] = 0;
} else if (cmpwrd("zdef",rec)) {
if (pfi->type == 2) continue;
if ( (ch = nxtwrd(rec)) == NULL) goto err1;
if ( (pos = intprs(ch,&(pfi->dnum[2])))==NULL) goto err1;
if (*pos!=' ') goto err1;
if ( (ch = nxtwrd(ch))==NULL) goto err2;
if (cmpwrd("linear",ch)) {
rc = deflin(ch, pfi, 2, 0);
if (rc==-1) goto err8;
if (rc) goto err9;
}
else if (cmpwrd("levels",ch)) {
if (pfi->dnum[2]<1) goto err7;
rc = deflev (ch, rec, pfi, 2);
if (rc==-1) goto err8;
if (rc) goto err9;
} else goto err2;
flgs[2] = 0;
} else if (cmpwrd("tdef",rec)) {
if ( (ch = nxtwrd(rec)) == NULL) goto err1;
if ( (pos = intprs(ch,&(pfi->dnum[3])))==NULL) goto err1;
if (*pos!=' ') goto err1;
if ( (ch = nxtwrd(ch))==NULL) goto err2;
if (cmpwrd("linear",ch)) {
if ( (ch = nxtwrd(ch))==NULL) goto err3;
tdef.yr = -1000;
tdef.mo = -1000;
tdef.dy = -1000;
if ( (pos = adtprs(ch,&tdef,&dt1))==NULL) goto err3;
if (*pos!=' ' || dt1.yr == -1000 || dt1.mo == -1000.0 ||
dt1.dy == -1000) goto err3;
if ( (ch = nxtwrd(ch))==NULL) goto err4;
if ( (pos = rdtprs(ch,&dt2))==NULL) goto err4;
v1 = (dt2.yr * 12) + dt2.mo;
v2 = (dt2.dy * 1440) + (dt2.hr * 60) + dt2.mn;
/*mf --- check if 0 dt ---mf*/
if( (v1 == 0) && (v2 == 0) ) goto err4a;
vals = (float *)malloc(sizeof(float)*8);
if (vals==NULL) goto err8;
*(vals) = dt1.yr;
*(vals+1) = dt1.mo;
*(vals+2) = dt1.dy;
*(vals+3) = dt1.hr;
*(vals+4) = dt1.mn;
*(vals+5) = v1;
*(vals+6) = v2;
*(vals+7) = -999.9;
pfi->grvals[3] = vals;
pfi->abvals[3] = vals;
pfi->linear[3] = 1;
} else goto err2;
flgs[3] = 0;
} else if (cmpwrd("vars",rec)) {
if ( (ch = nxtwrd(rec)) == NULL) goto err5;
if ( (pos = intprs(ch,&(pfi->vnum)))==NULL) goto err5;
size = pfi->vnum * (sizeof(struct gavar) + 7 );
pvar = (struct gavar *)malloc(size);
pfi->pvar1 = pvar;
i = 0;
while (i<pfi->vnum) {
if (fgets(rec,256,descr)==NULL) {
gaprnt (0,"Open Error: Unexpected EOF reading variables\n");
sprintf (pout, "Was expecting %i records. Found %i.\n",
pfi->vnum, i);
gaprnt (2,pout);
goto retrn;
}
strcpy (mrec,rec);
lowcas(rec);
if (cmpwrd("endvars",rec)) {
gaprnt (0,"Open Error: Unexpected ENDVARS record\n");
sprintf (pout, "Was expecting %i records. Found %i.\n",
pfi->vnum, i);
gaprnt (2,pout);
goto err9;
}
getwrd (pvar->abbrv,rec,15);
if ( (ch=nxtwrd(rec))==NULL) goto err6;
if ( (pos=intprs(ch,&(pvar->levels)))==NULL ) goto err6;
if ( (ch=nxtwrd(ch))==NULL) goto err6;
for (j=0;j<4;j++) pvar->units[j] = -999;
j = 0;
while (1) {
if ( (ch=intprs(ch,&(pvar->units[j])))==NULL ) goto err6;
while (*ch==' ') ch++;
if (*ch=='\0' || *ch=='\n') goto err6;
if (*ch!=',') break;
ch++;
while (*ch==' ') ch++;
if (*ch=='\0' || *ch=='\n') goto err6;
j++;
if (j>3) goto err6;
}
getstr (pvar->varnm,mrec+(ch-rec),127);
/*mf...........mf*/
/* initialize the var_z counter for NASA GLA format */
pvar->var_z = 1;
if(pvar->units[0] == -1 && pvar->units[1] == 10 ) {
nzstride++;
}
/* var_t is for DRS var-t transforms */
pvar->var_t = 0;
if(pvar->units[0] == -1 && pvar->units[1] == 20 ) pvar->var_t = 1;
/* x-y transpose for lat/lon vice lon/lat data VERY INEFFICIENT!!! */
pvar->y_x = 0;
if(pvar->units[0] == -1 && pvar->units[1] == 30) pvar->y_x = 1;
/*mf 961126 - integer data types mf*/
pvar->dfrm = 0;
if( (pvar->units[0] == -1 && pvar->units[1] == 40 ) &&
(pvar->units[2] >=1 && pvar->units[2] <= 4 ) ) {
pvar->dfrm= pvar->units[2];
if ( pvar->units[2] == 2 ) pvar->dfrm=2;
if ( pvar->units[2] == 2 && pvar->units[3] == -1) pvar->dfrm=-2;
}
/* 32-bit big endian ieee to cray float */
#if GRADS_CRAY == 1
if( (pvar->units[0]==-1 && pvar->units[1]==50) || crayflg ) pvar->dfrm=8;
#endif
/*mf...........mf*/
i++; pvar++;
}
if (fgets(rec,256,descr)==NULL) {
gaprnt (0,"Open Error: Missing ENDVARS statement.\n");
goto retrn;
}
lowcas(rec);
if (!cmpwrd("endvars",rec)) {
gaprnt (0,"Open Error: Looking for ENDVARS statement\n");
gaprnt (0," Instead, found: \n");
goto err9;
}
flgs[6] = 0;
/*
parse error of .ctl file
*/
} else {
gaprnt (0,"Open Error: Unknown keyword in description file\n");
goto err9;
}
}
err=0;
for (i=0; i<7; i++) {
if (flgs[i]) {
sprintf (pout,"Open Error: missing %s record \n",errs[i]);
gaprnt (0,pout);
err=1;
}
}
if (err) goto retrn;
if (pfi->type>1 && mflag) {
if (mcnt==-1) {
gaprnt (0,"Open Error: missing STNMAP record\n");
err=1;
} else if (mcnt != pfi->dnum[3]) {
gaprnt (0,"Open Error: Inconsistent time count\n");
sprintf (pout," Count in station map file = %li\n",mcnt);
gaprnt (0,pout);
sprintf (pout," Count in descriptor file = %i\n",pfi->dnum[3]);
gaprnt (0,pout);
err=1;
}
}
if (err) goto retrn;
/* Figure out locations of variables within a time group */
pvar = pfi->pvar1;
/*mf------------------mf*/
/*
Grid data
*/
if (pfi->type==1) {
pfi->gsiz = pfi->dnum[0] * pfi->dnum[1];
if (pfi->ppflag) pfi->gsiz = pfi->ppisiz * pfi->ppjsiz;
/*mf
add a constant xy header
mf*/
if (pfi->xyhdr) {
pfi->gsiz = pfi->gsiz + pfi->xyhdr;
}
if (pfi->seqflg) {
pfi->gsiz+=2;
if (hdrb>0) hdrb+=2;
pvar->offset = 1+hdrb;
acum = 1+hdrb;
} else {
pvar->offset = hdrb;
acum = hdrb;
}
levs = pvar->levels;
if (levs==0) levs=1;
pvar->recoff = 0;
recacm = 0;
pvar++;
acumvz=acum;
for (i=1; i<pfi->vnum; i++) {
/* NASA GLA FORMAT CHECKS */
/* upper air fields which var and z are transposed*/
if( (pvar->units[0]==-1) &&
(pvar->units[1]==10) &&
(pvar->units[2]==1) ) {
levsua = pvar->levels;
acum = acum + pfi->gsiz;
pvar->var_z = nzstride;
/* diagnstotic fields AFTER upper air fields which are in GrADS normal order */
} else if( (pvar->units[0]==-1) &&
(pvar->units[1]==10) &&
(pvar->units[2]==2) ) {
if(first) {
acumstride = acumstride + nzstride*levsua*pfi->gsiz;
acum = acumstride + (pvar->levels*pfi->gsiz) ;
first = 0 ;
} else {
acum = acum + (levs*pfi->gsiz);
}
} else if(pvar->var_t) { /* DRS transposition of var and t */
if(pfi->tmplat) { /* time template, read the third unit param
for the size of each chunk in a file */
if(pvar->units[2] != -999) {
acum = acum + levs*(pfi->gsiz)*(pvar->units[1]);
} else {
gaprnt (0,"Using time templat and 4-D variables, # times / file not specified\n");
gaprnt (0,"Defaulting to the number of times in the .ctl file\n");
acum = acum + levs*(pfi->gsiz)*(pfi->dnum[3]);
}
} else {
acum = acum + levs*(pfi->gsiz)*(pfi->dnum[3]);
}
} else { /* simple GrADS */
acum = acum + (levs*pfi->gsiz);
acumstride = acum ;
}
recacm += levs;
pvar->offset = acum;
pvar->recoff = recacm;
levs = pvar->levels;
if (levs==0) levs=1;
pvar++;
}
recacm += levs;
/*mf 960514 correct for case where the last variable is a NASA UA */
pvar--;
if( (pvar->units[0]==-1) &&
(pvar->units[1]==10) &&
(pvar->units[2]==1) ) {
acum = acumvz + recacm*pfi->gsiz;
}else {
acum = acum + (levs*pfi->gsiz);
}
/*mf --------------mf*/
/*
time chunk header; the default is 0
*/
if(pfi->seqflg && pfi->thdr>0) {
pfi->thdr+=2;
}
pfi->tsiz = acum + pfi->thdr;
/*mf --------------mf*/