1 |
greg |
2.7 |
/* Copyright (c) 1993 Regents of the University of California */ |
2 |
greg |
1.1 |
|
3 |
|
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#ifndef lint |
4 |
|
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static char SCCSid[] = "$SunId$ LBL"; |
5 |
|
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#endif |
6 |
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|
7 |
|
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/* |
8 |
|
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* data.c - routines dealing with interpolated data. |
9 |
|
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* |
10 |
|
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* 6/4/86 |
11 |
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*/ |
12 |
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13 |
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#include "standard.h" |
14 |
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|
15 |
|
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#include "color.h" |
16 |
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|
17 |
greg |
1.11 |
#include "resolu.h" |
18 |
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|
19 |
greg |
1.1 |
#include "data.h" |
20 |
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|
21 |
greg |
2.7 |
/* picture memory usage before warning */ |
22 |
|
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#ifndef PSIZWARN |
23 |
|
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#ifdef BIGMEM |
24 |
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#define PSIZWARN 3000000 |
25 |
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#else |
26 |
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#define PSIZWARN 1000000 |
27 |
|
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#endif |
28 |
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#endif |
29 |
greg |
1.1 |
|
30 |
greg |
2.7 |
#ifndef TABSIZ |
31 |
greg |
2.6 |
#define TABSIZ 97 /* table size (prime) */ |
32 |
greg |
2.7 |
#endif |
33 |
greg |
2.6 |
|
34 |
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#define hash(s) (shash(s)%TABSIZ) |
35 |
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36 |
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37 |
greg |
2.8 |
extern char *getlibpath(); /* library search path */ |
38 |
greg |
1.1 |
|
39 |
greg |
2.6 |
static DATARRAY *dtab[TABSIZ]; /* data array list */ |
40 |
greg |
1.1 |
|
41 |
greg |
2.6 |
static DATARRAY *ptab[TABSIZ]; /* picture list */ |
42 |
greg |
1.1 |
|
43 |
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|
44 |
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DATARRAY * |
45 |
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getdata(dname) /* get data array dname */ |
46 |
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char *dname; |
47 |
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{ |
48 |
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char *dfname; |
49 |
|
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FILE *fp; |
50 |
|
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int asize; |
51 |
greg |
1.4 |
register int i, j; |
52 |
greg |
1.1 |
register DATARRAY *dp; |
53 |
|
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/* look for array in list */ |
54 |
greg |
2.6 |
for (dp = dtab[hash(dname)]; dp != NULL; dp = dp->next) |
55 |
greg |
1.1 |
if (!strcmp(dname, dp->name)) |
56 |
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return(dp); /* found! */ |
57 |
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58 |
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/* |
59 |
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* If we haven't loaded the data already, we will look |
60 |
greg |
2.5 |
* for it in the directories specified by the library path. |
61 |
greg |
1.1 |
* |
62 |
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* The file has the following format: |
63 |
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* |
64 |
greg |
1.4 |
* N |
65 |
greg |
1.1 |
* beg0 end0 n0 |
66 |
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* beg1 end1 n1 |
67 |
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* . . . |
68 |
greg |
1.4 |
* begN endN nN |
69 |
greg |
1.1 |
* data, later dimensions changing faster |
70 |
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* . . . |
71 |
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* |
72 |
greg |
1.4 |
* For irregularly spaced points, the following can be |
73 |
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* substituted for begi endi ni: |
74 |
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* |
75 |
greg |
1.6 |
* 0 0 ni p0i p1i .. pni |
76 |
greg |
1.1 |
*/ |
77 |
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|
78 |
greg |
2.8 |
if ((dfname = getpath(dname, getlibpath(), R_OK)) == NULL) { |
79 |
greg |
1.1 |
sprintf(errmsg, "cannot find data file \"%s\"", dname); |
80 |
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error(USER, errmsg); |
81 |
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} |
82 |
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if ((dp = (DATARRAY *)malloc(sizeof(DATARRAY))) == NULL) |
83 |
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goto memerr; |
84 |
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85 |
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dp->name = savestr(dname); |
86 |
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87 |
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if ((fp = fopen(dfname, "r")) == NULL) { |
88 |
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sprintf(errmsg, "cannot open data file \"%s\"", dfname); |
89 |
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error(SYSTEM, errmsg); |
90 |
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} |
91 |
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/* get dimensions */ |
92 |
greg |
2.10 |
if (fgetval(fp, 'i', &dp->nd) <= 0) |
93 |
greg |
1.1 |
goto scanerr; |
94 |
greg |
1.9 |
if (dp->nd <= 0 || dp->nd > MAXDDIM) { |
95 |
greg |
1.1 |
sprintf(errmsg, "bad number of dimensions for \"%s\"", dname); |
96 |
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error(USER, errmsg); |
97 |
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} |
98 |
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asize = 1; |
99 |
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for (i = 0; i < dp->nd; i++) { |
100 |
greg |
2.10 |
if (fgetval(fp, 'd', &dp->dim[i].org) <= 0) |
101 |
greg |
1.6 |
goto scanerr; |
102 |
greg |
2.10 |
if (fgetval(fp, 'd', &dp->dim[i].siz) <= 0) |
103 |
greg |
1.10 |
goto scanerr; |
104 |
greg |
2.10 |
if (fgetval(fp, 'i', &dp->dim[i].ne) <= 0) |
105 |
greg |
1.10 |
goto scanerr; |
106 |
greg |
1.6 |
if (dp->dim[i].ne < 2) |
107 |
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goto scanerr; |
108 |
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asize *= dp->dim[i].ne; |
109 |
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if ((dp->dim[i].siz -= dp->dim[i].org) == 0) { |
110 |
greg |
1.4 |
dp->dim[i].p = (double *)malloc(dp->dim[i].ne*sizeof(double)); |
111 |
|
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if (dp->dim[i].p == NULL) |
112 |
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goto memerr; |
113 |
greg |
2.10 |
for (j = 0; j < dp->dim[i].ne; j++) |
114 |
|
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if (fgetval(fp, 'd', &dp->dim[i].p[i]) <= 0) |
115 |
greg |
1.4 |
goto scanerr; |
116 |
|
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for (j = 1; j < dp->dim[i].ne-1; j++) |
117 |
|
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if ((dp->dim[i].p[j-1] < dp->dim[i].p[j]) != |
118 |
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(dp->dim[i].p[j] < dp->dim[i].p[j+1])) |
119 |
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goto scanerr; |
120 |
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dp->dim[i].org = dp->dim[i].p[0]; |
121 |
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dp->dim[i].siz = dp->dim[i].p[dp->dim[i].ne-1] |
122 |
|
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- dp->dim[i].p[0]; |
123 |
|
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} else |
124 |
greg |
1.6 |
dp->dim[i].p = NULL; |
125 |
greg |
1.1 |
} |
126 |
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if ((dp->arr = (DATATYPE *)malloc(asize*sizeof(DATATYPE))) == NULL) |
127 |
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goto memerr; |
128 |
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|
129 |
greg |
2.10 |
for (i = 0; i < asize; i++) |
130 |
|
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if (fgetval(fp, DATATY, &dp->arr[i]) <= 0) |
131 |
greg |
1.1 |
goto scanerr; |
132 |
|
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fclose(fp); |
133 |
greg |
2.6 |
i = hash(dname); |
134 |
|
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dp->next = dtab[i]; |
135 |
|
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return(dtab[i] = dp); |
136 |
greg |
1.1 |
|
137 |
|
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memerr: |
138 |
|
|
error(SYSTEM, "out of memory in getdata"); |
139 |
|
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scanerr: |
140 |
|
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sprintf(errmsg, "%s in data file \"%s\"", |
141 |
|
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feof(fp) ? "unexpected EOF" : "bad format", dfname); |
142 |
|
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error(USER, errmsg); |
143 |
|
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} |
144 |
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|
145 |
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|
146 |
greg |
1.5 |
static |
147 |
greg |
2.4 |
headaspect(s, iap) /* check string for aspect ratio */ |
148 |
greg |
1.5 |
char *s; |
149 |
greg |
2.4 |
double *iap; |
150 |
greg |
1.5 |
{ |
151 |
|
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if (isaspect(s)) |
152 |
greg |
2.4 |
*iap *= aspectval(s); |
153 |
greg |
1.5 |
} |
154 |
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|
155 |
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|
156 |
greg |
1.1 |
DATARRAY * |
157 |
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getpict(pname) /* get picture pname */ |
158 |
|
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char *pname; |
159 |
|
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{ |
160 |
greg |
2.4 |
double inpaspect; |
161 |
greg |
1.1 |
char *pfname; |
162 |
|
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FILE *fp; |
163 |
|
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COLOR *scanin; |
164 |
greg |
1.11 |
int sl, ns; |
165 |
greg |
2.3 |
RESOLU inpres; |
166 |
greg |
1.11 |
FLOAT loc[2]; |
167 |
|
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int y; |
168 |
|
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register int x, i; |
169 |
greg |
1.1 |
register DATARRAY *pp; |
170 |
|
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/* look for array in list */ |
171 |
greg |
2.6 |
for (pp = ptab[hash(pname)]; pp != NULL; pp = pp->next) |
172 |
greg |
1.1 |
if (!strcmp(pname, pp->name)) |
173 |
|
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return(pp); /* found! */ |
174 |
|
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|
175 |
greg |
2.8 |
if ((pfname = getpath(pname, getlibpath(), R_OK)) == NULL) { |
176 |
greg |
1.1 |
sprintf(errmsg, "cannot find picture file \"%s\"", pname); |
177 |
|
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error(USER, errmsg); |
178 |
|
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} |
179 |
|
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if ((pp = (DATARRAY *)calloc(3, sizeof(DATARRAY))) == NULL) |
180 |
|
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goto memerr; |
181 |
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|
182 |
|
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pp[0].name = |
183 |
|
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pp[1].name = |
184 |
|
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pp[2].name = savestr(pname); |
185 |
|
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|
186 |
|
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if ((fp = fopen(pfname, "r")) == NULL) { |
187 |
|
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sprintf(errmsg, "cannot open picture file \"%s\"", pfname); |
188 |
|
|
error(SYSTEM, errmsg); |
189 |
|
|
} |
190 |
greg |
2.3 |
#ifdef MSDOS |
191 |
|
|
setmode(fileno(fp), O_BINARY); |
192 |
|
|
#endif |
193 |
greg |
1.1 |
/* get dimensions */ |
194 |
greg |
1.5 |
inpaspect = 1.0; |
195 |
greg |
2.4 |
getheader(fp, headaspect, &inpaspect); |
196 |
greg |
1.11 |
if (!fgetsresolu(&inpres, fp)) |
197 |
greg |
1.1 |
goto readerr; |
198 |
greg |
2.7 |
#if PSIZWARN |
199 |
|
|
/* check memory usage */ |
200 |
|
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i = 3*sizeof(DATATYPE)*inpres.xr*inpres.yr; |
201 |
|
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if (i > PSIZWARN) { |
202 |
|
|
sprintf(errmsg, "picture file \"%s\" using %d bytes of memory", |
203 |
|
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pname, i); |
204 |
|
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error(WARNING, errmsg); |
205 |
|
|
} |
206 |
|
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#endif |
207 |
greg |
1.1 |
for (i = 0; i < 3; i++) { |
208 |
|
|
pp[i].nd = 2; |
209 |
greg |
1.11 |
pp[i].dim[0].ne = inpres.yr; |
210 |
|
|
pp[i].dim[1].ne = inpres.xr; |
211 |
greg |
1.1 |
pp[i].dim[0].org = |
212 |
|
|
pp[i].dim[1].org = 0.0; |
213 |
greg |
1.11 |
if (inpres.xr <= inpres.yr*inpaspect) { |
214 |
|
|
pp[i].dim[0].siz = inpaspect * |
215 |
|
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(double)inpres.yr/inpres.xr; |
216 |
greg |
1.7 |
pp[i].dim[1].siz = 1.0; |
217 |
|
|
} else { |
218 |
greg |
1.1 |
pp[i].dim[0].siz = 1.0; |
219 |
greg |
1.11 |
pp[i].dim[1].siz = (double)inpres.xr/inpres.yr / |
220 |
|
|
inpaspect; |
221 |
greg |
1.1 |
} |
222 |
greg |
1.7 |
pp[i].dim[0].p = pp[i].dim[1].p = NULL; |
223 |
greg |
1.11 |
pp[i].arr = (DATATYPE *) |
224 |
|
|
malloc(inpres.xr*inpres.yr*sizeof(DATATYPE)); |
225 |
greg |
1.1 |
if (pp[i].arr == NULL) |
226 |
|
|
goto memerr; |
227 |
|
|
} |
228 |
|
|
/* load picture */ |
229 |
greg |
1.11 |
sl = scanlen(&inpres); |
230 |
|
|
ns = numscans(&inpres); |
231 |
|
|
if ((scanin = (COLOR *)malloc(sl*sizeof(COLOR))) == NULL) |
232 |
greg |
1.1 |
goto memerr; |
233 |
greg |
1.11 |
for (y = 0; y < ns; y++) { |
234 |
|
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if (freadscan(scanin, sl, fp) < 0) |
235 |
greg |
1.1 |
goto readerr; |
236 |
greg |
1.11 |
for (x = 0; x < sl; x++) { |
237 |
|
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pix2loc(loc, &inpres, x, y); |
238 |
|
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i = (int)(loc[1]*inpres.yr)*inpres.xr + |
239 |
|
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(int)(loc[0]*inpres.xr); |
240 |
|
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pp[0].arr[i] = colval(scanin[x],RED); |
241 |
|
|
pp[1].arr[i] = colval(scanin[x],GRN); |
242 |
|
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pp[2].arr[i] = colval(scanin[x],BLU); |
243 |
|
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} |
244 |
greg |
1.1 |
} |
245 |
|
|
free((char *)scanin); |
246 |
|
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fclose(fp); |
247 |
greg |
2.6 |
i = hash(pname); |
248 |
greg |
1.1 |
pp[0].next = |
249 |
|
|
pp[1].next = |
250 |
greg |
2.6 |
pp[2].next = ptab[i]; |
251 |
|
|
return(ptab[i] = pp); |
252 |
greg |
1.1 |
|
253 |
|
|
memerr: |
254 |
|
|
error(SYSTEM, "out of memory in getpict"); |
255 |
|
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readerr: |
256 |
|
|
sprintf(errmsg, "bad picture file \"%s\"", pfname); |
257 |
|
|
error(USER, errmsg); |
258 |
|
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} |
259 |
|
|
|
260 |
|
|
|
261 |
|
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freedata(dname) /* free memory associated with dname */ |
262 |
|
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char *dname; |
263 |
|
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{ |
264 |
greg |
2.5 |
DATARRAY head; |
265 |
greg |
2.6 |
int hval, nents; |
266 |
greg |
1.1 |
register DATARRAY *dp, *dpl; |
267 |
greg |
1.4 |
register int i; |
268 |
greg |
1.1 |
|
269 |
greg |
2.6 |
if (dname == NULL) { /* free all if NULL */ |
270 |
|
|
hval = 0; nents = TABSIZ; |
271 |
|
|
} else { |
272 |
|
|
hval = hash(dname); nents = 1; |
273 |
|
|
} |
274 |
|
|
while (nents--) { |
275 |
|
|
head.next = dtab[hval]; |
276 |
|
|
dpl = &head; |
277 |
|
|
while ((dp = dpl->next) != NULL) |
278 |
|
|
if (dname == NULL || !strcmp(dname, dp->name)) { |
279 |
|
|
dpl->next = dp->next; |
280 |
|
|
free((char *)dp->arr); |
281 |
|
|
for (i = 0; i < dp->nd; i++) |
282 |
|
|
if (dp->dim[i].p != NULL) |
283 |
|
|
free((char *)dp->dim[i].p); |
284 |
|
|
freestr(dp->name); |
285 |
|
|
free((char *)dp); |
286 |
|
|
} else |
287 |
|
|
dpl = dp; |
288 |
|
|
dtab[hval++] = head.next; |
289 |
|
|
} |
290 |
greg |
1.1 |
} |
291 |
|
|
|
292 |
|
|
|
293 |
|
|
freepict(pname) /* free memory associated with pname */ |
294 |
|
|
char *pname; |
295 |
|
|
{ |
296 |
greg |
2.5 |
DATARRAY head; |
297 |
greg |
2.6 |
int hval, nents; |
298 |
greg |
1.1 |
register DATARRAY *pp, *ppl; |
299 |
|
|
|
300 |
greg |
2.6 |
if (pname == NULL) { /* free all if NULL */ |
301 |
|
|
hval = 0; nents = TABSIZ; |
302 |
|
|
} else { |
303 |
|
|
hval = hash(pname); nents = 1; |
304 |
|
|
} |
305 |
|
|
while (nents--) { |
306 |
|
|
head.next = ptab[hval]; |
307 |
|
|
ppl = &head; |
308 |
|
|
while ((pp = ppl->next) != NULL) |
309 |
|
|
if (pname == NULL || !strcmp(pname, pp->name)) { |
310 |
|
|
ppl->next = pp->next; |
311 |
|
|
free((char *)pp[0].arr); |
312 |
|
|
free((char *)pp[1].arr); |
313 |
|
|
free((char *)pp[2].arr); |
314 |
|
|
freestr(pp[0].name); |
315 |
|
|
free((char *)pp); |
316 |
|
|
} else |
317 |
|
|
ppl = pp; |
318 |
|
|
ptab[hval++] = head.next; |
319 |
|
|
} |
320 |
greg |
1.1 |
} |
321 |
|
|
|
322 |
|
|
|
323 |
|
|
double |
324 |
|
|
datavalue(dp, pt) /* interpolate data value at a point */ |
325 |
|
|
register DATARRAY *dp; |
326 |
greg |
2.3 |
double *pt; |
327 |
greg |
1.1 |
{ |
328 |
|
|
DATARRAY sd; |
329 |
|
|
int asize; |
330 |
greg |
1.6 |
int lower, upper; |
331 |
greg |
1.1 |
register int i; |
332 |
greg |
2.9 |
double x, y0, y1; |
333 |
greg |
1.4 |
/* set up dimensions for recursion */ |
334 |
greg |
1.1 |
sd.nd = dp->nd - 1; |
335 |
|
|
asize = 1; |
336 |
|
|
for (i = 0; i < sd.nd; i++) { |
337 |
|
|
sd.dim[i].org = dp->dim[i+1].org; |
338 |
|
|
sd.dim[i].siz = dp->dim[i+1].siz; |
339 |
greg |
1.4 |
sd.dim[i].p = dp->dim[i+1].p; |
340 |
greg |
1.1 |
asize *= sd.dim[i].ne = dp->dim[i+1].ne; |
341 |
|
|
} |
342 |
greg |
1.4 |
/* get independent variable */ |
343 |
|
|
if (dp->dim[0].p == NULL) { /* evenly spaced points */ |
344 |
|
|
x = (pt[0] - dp->dim[0].org)/dp->dim[0].siz; |
345 |
greg |
2.9 |
x *= (double)(dp->dim[0].ne - 1); |
346 |
greg |
1.4 |
i = x; |
347 |
|
|
if (i < 0) |
348 |
|
|
i = 0; |
349 |
|
|
else if (i > dp->dim[0].ne - 2) |
350 |
|
|
i = dp->dim[0].ne - 2; |
351 |
|
|
} else { /* unevenly spaced points */ |
352 |
greg |
1.6 |
if (dp->dim[0].siz > 0.0) { |
353 |
|
|
lower = 0; |
354 |
|
|
upper = dp->dim[0].ne; |
355 |
|
|
} else { |
356 |
|
|
lower = dp->dim[0].ne; |
357 |
|
|
upper = 0; |
358 |
|
|
} |
359 |
|
|
do { |
360 |
|
|
i = (lower + upper) >> 1; |
361 |
|
|
if (pt[0] >= dp->dim[0].p[i]) |
362 |
|
|
lower = i; |
363 |
greg |
1.8 |
else |
364 |
greg |
1.6 |
upper = i; |
365 |
|
|
} while (i != (lower + upper) >> 1); |
366 |
greg |
1.8 |
if (i > dp->dim[0].ne - 2) |
367 |
greg |
1.4 |
i = dp->dim[0].ne - 2; |
368 |
|
|
x = i + (pt[0] - dp->dim[0].p[i]) / |
369 |
|
|
(dp->dim[0].p[i+1] - dp->dim[0].p[i]); |
370 |
|
|
} |
371 |
|
|
/* get dependent variable */ |
372 |
greg |
1.1 |
if (dp->nd == 1) { |
373 |
|
|
y0 = dp->arr[i]; |
374 |
|
|
y1 = dp->arr[i+1]; |
375 |
|
|
} else { |
376 |
|
|
sd.arr = &dp->arr[i*asize]; |
377 |
|
|
y0 = datavalue(&sd, pt+1); |
378 |
|
|
sd.arr = &dp->arr[(i+1)*asize]; |
379 |
|
|
y1 = datavalue(&sd, pt+1); |
380 |
|
|
} |
381 |
|
|
/* |
382 |
|
|
* Extrapolate as far as one division, then |
383 |
|
|
* taper off harmonically to zero. |
384 |
|
|
*/ |
385 |
|
|
if (x > i+2) |
386 |
greg |
2.9 |
return( (2*y1-y0)/(x-(i-1)) ); |
387 |
greg |
1.1 |
|
388 |
greg |
2.9 |
if (x < i-1) |
389 |
|
|
return( (2*y0-y1)/(i-x) ); |
390 |
|
|
|
391 |
|
|
return( y0*((i+1)-x) + y1*(x-i) ); |
392 |
greg |
1.1 |
} |