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root/radiance/ray/src/common/header.c
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Comparing ray/src/common/header.c (file contents):
Revision 2.35 by greg, Fri Jul 19 17:37:56 2019 UTC vs.
Revision 2.38 by greg, Tue Sep 24 21:25:59 2019 UTC

# Line 15 | Line 15 | static const char      RCSid[] = "$Id$";
15   *  printargs(ac,av,fp) print an argument list to fp, followed by '\n'
16   *  formatval(r,s)      copy the format value in s to r
17   *  fputformat(s,fp)    write "FORMAT=%s" to fp
18 + *  nativebigendian()   are we native on big-endian machine?
19 + *  isbigendian(s)      header line matches "BigEndian=1" (-1 if irrelevant)
20 + *  fputendian(fp)      write native endianness in BigEndian= line
21   *  getheader(fp,f,p)   read header from fp, calling f(s,p) on each line
22   *  globmatch(pat, str) check for glob match of str against pat
23   *  checkheader(i,p,o)  check header format from i against p and copy to o
# Line 26 | Line 29 | static const char      RCSid[] = "$Id$";
29  
30   #include  <ctype.h>
31  
32 + #include  "tiff.h"      /* for int32 */
33   #include  "rtio.h"
34   #include  "resolu.h"
35  
# Line 40 | Line 44 | const char  FMTSTR[] = "FORMAT=";      /* format identifier
44   const char  TMSTR[] = "CAPDATE=";       /* capture date identifier */
45   const char  GMTSTR[] = "GMT=";          /* GMT identifier */
46  
47 + const char  BIGEND[] = "BigEndian=";    /* big-endian variable */
48 +
49   static gethfunc mycheck;
50  
51  
# Line 202 | Line 208 | fputformat(            /* put out a format value */
208  
209  
210   int
211 + nativebigendian()       /* are we native on a big-endian machine? */
212 + {
213 +        union { int32 i; char c[4]; } u;
214 +
215 +        u.i = 1;
216 +
217 +        return(u.c[0] == 0);
218 + }
219 +
220 +
221 + int
222 + isbigendian(            /* header line says "BigEndian=1" (-1 if irrelevant) */
223 +        const char *s
224 + )
225 + {
226 +        const char      *be = BIGEND;
227 +
228 +        while ((*s != '\0') & (*be != '=') && *s++ == *be)
229 +                ++be;
230 +        if (*be != '=')
231 +                return(-1);     /* irrelevant */
232 +        while (isspace(*s))
233 +                s++;
234 +        if (*s++ != '=')
235 +                return(-1);
236 +        while (isspace(*s))
237 +                s++;
238 +        return(*s == '1');
239 + }
240 +
241 +
242 + void
243 + fputendian(             /* write native endianness in BigEndian= line */
244 +        FILE *fp
245 + )
246 + {
247 +        fputs(BIGEND, fp);
248 +        if (nativebigendian())
249 +                fputs("1\n", fp);
250 +        else
251 +                fputs("0\n", fp);
252 + }
253 +
254 +
255 + int
256   getheader(              /* get header from file */
257          FILE  *fp,
258          gethfunc *f,
# Line 248 | Line 299 | mycheck(                       /* check a header line for format info. */
299          struct check    *scp = (struct check *)cp;
300  
301          if (!formatval(scp->fs, s) && scp->fp != NULL)
302 <                fputs(s, scp->fp);
302 >                return(fputs(s, scp->fp));
303  
304          return(0);
305   }

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