--- ray/src/common/header.c	1991/04/22 08:23:10	1.4
+++ ray/src/common/header.c	2020/07/24 16:58:16	2.39
@@ -1,69 +1,213 @@
-/* Copyright (c) 1991 Regents of the University of California */
-
 #ifndef lint
-static char SCCSid[] = "$SunId$ LBL";
+static const char	RCSid[] = "$Id: header.c,v 2.39 2020/07/24 16:58:16 greg Exp $";
 #endif
-
 /*
  *  header.c - routines for reading and writing information headers.
  *
- *	8/19/88
+ *  Externals declared in rtio.h
  *
- *  printargs(ac,av,fp)	print an argument list to fp, followed by '\n'
- *  isformat(s)		returns true if s is of the form "FORMAT=*"
+ *  newheader(t,fp)	start new information header identified by string t
+ *  headidval(r,s)	copy header identifier value in s to r
+ *  dateval(t,s)	get capture date value as UTC
+ *  gmtval(t,s)		get GMT as UTC
+ *  fputdate(t,fp)	put out the given UTC
+ *  fputnow(fp)		put out the current date and time
+ *  printargs(ac,av,fp) print an argument list to fp, followed by '\n'
  *  formatval(r,s)	copy the format value in s to r
  *  fputformat(s,fp)	write "FORMAT=%s" to fp
+ *  nativebigendian()	are we native on big-endian machine?
+ *  isbigendian(s)	header line matches "BigEndian=1" (-1 if irrelevant)
+ *  fputendian(fp)	write native endianness in BigEndian= line
  *  getheader(fp,f,p)	read header from fp, calling f(s,p) on each line
+ *  globmatch(pat, str)	check for glob match of str against pat
  *  checkheader(i,p,o)	check header format from i against p and copy to o
  *
  *  To copy header from input to output, use getheader(fin, fputs, fout)
  */
 
-#include  <stdio.h>
+#include "copyright.h"
+
 #include  <ctype.h>
 
-#define  MAXLINE	512
+#include  "tiff.h"	/* for int32 */
+#include  "rtio.h"
+#include  "resolu.h"
 
-char  FMTSTR[] = "FORMAT=";
-int  FMTSTRL = 7;
+#define	 MAXLINE	2048
 
+extern time_t		timegm(struct tm *tm);
 
-printargs(ac, av, fp)		/* print arguments to a file */
-int  ac;
-char  **av;
-FILE  *fp;
+const char  HDRSTR[] = "#?";		/* information header magic number */
+
+const char  FMTSTR[] = "FORMAT=";	/* format identifier */
+
+const char  TMSTR[] = "CAPDATE=";	/* capture date identifier */
+const char  GMTSTR[] = "GMT=";		/* GMT identifier */
+
+const char  BIGEND[] = "BigEndian=";	/* big-endian variable */
+
+static gethfunc mycheck;
+
+
+void
+newheader(		/* identifying line of information header */
+	const char  *s,
+	FILE  *fp
+)
 {
-	while (ac-- > 0) {
-		fputs(*av++, fp);
-		putc(' ', fp);
-	}
+	fputs(HDRSTR, fp);
+	fputs(s, fp);
 	putc('\n', fp);
 }
 
 
-isformat(s)			/* is line a format line? */
-char  *s;
+int
+headidval(			/* get header id (return true if is id) */
+	char  *r,
+	const char	*s
+)
 {
-	return(!strncmp(s,FMTSTR,FMTSTRL));
+	const char  *cp = HDRSTR;
+
+	while (*cp) if (*cp++ != *s++) return(0);
+	if (r == NULL) return(1);
+	while (*s && !isspace(*s)) *r++ = *s++;
+	*r = '\0';
+	return(1);
 }
 
 
-formatval(r, s)			/* return format value */
-register char  *r;
-register char  *s;
+int
+dateval(		/* convert capture date line to UTC */
+	time_t	*tloc,
+	const char	*s
+)
 {
-	s += FMTSTRL;
+	struct tm	tms;
+	const char	*cp = TMSTR;
+
+	while (*cp) if (*cp++ != *s++) return(0);
 	while (isspace(*s)) s++;
-	if (!*s) { *r = '\0'; return; }
-	while(*s) *r++ = *s++;
-	while (isspace(r[-1])) r--;
+	if (!*s) return(0);
+	if (sscanf(s, "%d:%d:%d %d:%d:%d",
+			&tms.tm_year, &tms.tm_mon, &tms.tm_mday,
+			&tms.tm_hour, &tms.tm_min, &tms.tm_sec) != 6)
+		return(0);
+	if (tloc == NULL)
+		return(1);
+	tms.tm_mon--;
+	tms.tm_year -= 1900;
+	tms.tm_isdst = -1;	/* ask mktime() to figure out DST */
+	*tloc = mktime(&tms);
+	return(1);
+}
+
+
+int
+gmtval(			/* convert GMT date line to UTC */
+	time_t	*tloc,
+	const char	*s
+)
+{
+	struct tm	tms;
+	const char	*cp = GMTSTR;
+
+	while (*cp) if (*cp++ != *s++) return(0);
+	while (isspace(*s)) s++;
+	if (!*s) return(0);
+	if (sscanf(s, "%d:%d:%d %d:%d:%d",
+			&tms.tm_year, &tms.tm_mon, &tms.tm_mday,
+			&tms.tm_hour, &tms.tm_min, &tms.tm_sec) != 6)
+		return(0);
+	if (tloc == NULL)
+		return(1);
+	tms.tm_mon--;
+	tms.tm_year -= 1900;
+	*tloc = timegm(&tms);
+	return(1);
+}
+
+
+void
+fputdate(		/* write out the given time value (local & GMT) */
+	time_t	tv,
+	FILE	*fp
+)
+{
+	struct tm	*tms;
+
+	tms = localtime(&tv);
+	if (tms != NULL)
+		fprintf(fp, "%s %04d:%02d:%02d %02d:%02d:%02d\n", TMSTR,
+				tms->tm_year+1900, tms->tm_mon+1, tms->tm_mday,
+				tms->tm_hour, tms->tm_min, tms->tm_sec);
+	tms = gmtime(&tv);
+	if (tms != NULL)
+		fprintf(fp, "%s %04d:%02d:%02d %02d:%02d:%02d\n", GMTSTR,
+				tms->tm_year+1900, tms->tm_mon+1, tms->tm_mday,
+				tms->tm_hour, tms->tm_min, tms->tm_sec);
+}
+
+
+void
+fputnow(			/* write out the current time */
+	FILE	*fp
+)
+{
+	time_t	tv;
+	time(&tv);
+	fputdate(tv, fp);
+}
+
+
+void
+printargs(		/* print arguments to a file */
+	int  ac,
+	char  **av,
+	FILE  *fp
+)
+{
+#if defined(_WIN32) || defined(_WIN64)
+	extern char	*fixargv0(char *arg0);
+	char		myav0[128];
+				/* clean up Windows executable path */
+	if (ac <= 0) return;
+	fputs(fixargv0(strcpy(myav0, *av++)), fp);
+	fputc(--ac ? ' ' : '\n');
+#endif
+	while (ac-- > 0) {
+		fputword(*av++, fp);
+		fputc(ac ? ' ' : '\n', fp);
+	}
+}
+
+
+int
+formatval(			/* get format value (return true if format) */
+	char  fmt[MAXFMTLEN],
+	const char  *s
+)
+{
+	const char  *cp = FMTSTR;
+	char  *r = fmt;
+
+	while (*cp) if (*cp++ != *s++) return(0);
+	while (isspace(*s)) s++;
+	if (!*s) return(0);
+	if (r == NULL) return(1);
+	do
+		*r++ = *s++;
+	while (*s && !isspace(*s) && r-fmt < MAXFMTLEN-1);
 	*r = '\0';
+	return(1);
 }
 
 
-fputformat(s, fp)		/* put out a format value */
-char  *s;
-FILE  *fp;
+void
+fputformat(		/* put out a format value */
+	const char  *s,
+	FILE  *fp
+)
 {
 	fputs(FMTSTR, fp);
 	fputs(s, fp);
@@ -71,76 +215,144 @@ FILE  *fp;
 }
 
 
-getheader(fp, f, p)		/* get header from file */
-FILE  *fp;
-int  (*f)();
-char  *p;
+int
+nativebigendian()	/* are we native on a big-endian machine? */
 {
+	union { int32 i; char c[4]; } u;
+
+	u.i = 1;
+
+	return(u.c[0] == 0);
+}
+
+
+int
+isbigendian(		/* header line says "BigEndian=1" (-1 if irrelevant) */
+	const char *s
+)
+{
+	const char	*be = BIGEND;
+
+	while ((*s != '\0') & (*be != '=') && *s++ == *be)
+		++be;
+	if (*be != '=')
+		return(-1);	/* irrelevant */
+	while (isspace(*s))
+		s++;
+	if (*s++ != '=')
+		return(-1);
+	while (isspace(*s))
+		s++;
+	return(*s == '1');
+}
+
+
+void
+fputendian(		/* write native endianness in BigEndian= line */
+	FILE *fp
+)
+{
+	fputs(BIGEND, fp);
+	if (nativebigendian())
+		fputs("1\n", fp);
+	else
+		fputs("0\n", fp);
+}
+
+
+int
+getheader(		/* get header from file */
+	FILE  *fp,
+	gethfunc *f,
+	void  *p
+)
+{
+	int   rtotal = 0;
 	char  buf[MAXLINE];
+	int   firstc = fgetc(fp);
 
+	if (!isprint(firstc))
+		return(-1);				/* messed up */
+	ungetc(firstc, fp);
 	for ( ; ; ) {
+		int	rval = 0;
 		buf[MAXLINE-2] = '\n';
-		if (fgets(buf, sizeof(buf), fp) == NULL)
+		if (fgets(buf, MAXLINE, fp) == NULL)
 			return(-1);
-		if (buf[0] == '\n')
-			return(0);
+		if (buf[buf[0]=='\r'] == '\n')		/* end of header? */
+			return(rtotal);
 		if (buf[MAXLINE-2] != '\n') {
 			ungetc(buf[MAXLINE-2], fp);	/* prevent false end */
 			buf[MAXLINE-2] = '\0';
 		}
-		if (f != NULL)
-			(*f)(buf, p);
+		if (f != NULL && (rval = (*f)(buf, p)) < 0)
+			return(-1);
+		rtotal += rval;
 	}
 }
 
 
 struct check {
 	FILE	*fp;
-	char	fs[64];
+	char	fs[MAXFMTLEN];
 };
 
 
-static
-mycheck(s, cp)			/* check a header line for format info. */
-char  *s;
-register struct check  *cp;
+static int
+mycheck(			/* check a header line for format info. */
+	char  *s,
+	void  *cp
+)
 {
-	if (!strncmp(s,FMTSTR,FMTSTRL))
-		formatval(cp->fs, s);
-	else if (cp->fp != NULL)	/* don't copy format info. */
-		fputs(s, cp->fp);
-}
+	struct check	*scp = (struct check *)cp;
 
+	if (!formatval(scp->fs, s) && scp->fp != NULL)
+		return(fputs(s, scp->fp));
 
-/*
- * Copymatch(pat,str) checks pat for wildcards, and
- * copies str into pat if there is a match (returning true).
- */
+	return(0);
+}
 
-#ifdef COPYMATCH
-copymatch(pat, str)
-char	*pat, *str;
+
+int
+globmatch(			/* check for match of s against pattern p */
+	const char	*p,
+	const char	*s
+)
 {
-	int	docopy = 0;
-	register char	*p = pat, *s = str;
+	int	setmatch;
 
 	do {
 		switch (*p) {
 		case '?':			/* match any character */
 			if (!*s++)
 				return(0);
-			docopy++;
 			break;
 		case '*':			/* match any string */
 			while (p[1] == '*') p++;
 			do
-				if ( (p[1]=='?' || p[1]==*s)
-						&& copymatch(p+1,s) ) {
-					strcpy(pat, str);
+				if ( (p[1]=='?') | (p[1]==*s) &&
+						globmatch(p+1,s) )
 					return(1);
-				}
 			while (*s++);
 			return(0);
+		case '[':			/* character set */
+			setmatch = *s == *++p;
+			if (!*p)
+				return(0);
+			while (*++p != ']') {
+				if (!*p)
+					return(0);
+				if (*p == '-') {
+					setmatch += (p[-1] <= *s && *s <= p[1]);
+					if (!*++p)
+						break;
+				} else
+					setmatch += (*p == *s);
+			}
+			if (!setmatch)
+				return(0);
+			s++;
+			break;
 		case '\\':			/* literal next */
 			p++;
 		/* fall through */
@@ -151,13 +363,8 @@ char	*pat, *str;
 			break;
 		}
 	} while (*p++);
-	if (docopy)
-		strcpy(pat, str);
 	return(1);
 }
-#else
-#define copymatch(pat, s)	(!strcmp(pat, s))
-#endif
 
 
 /*
@@ -168,23 +375,35 @@ char	*pat, *str;
  * if any input format is found (or there is an error), and 0 otherwise.
  * If fmt contains any '*' or '?' characters, then checkheader
  * does wildcard expansion and copies a matching result into fmt.
- * Be sure that fmt is big enough to hold the match in such cases!
+ * Be sure that fmt is big enough to hold the match in such cases,
+ * and that it is not a static, read-only string!
  * The input header (minus any format lines) is copied to fout
  * if fout is not NULL.
  */
 
-checkheader(fin, fmt, fout)
-FILE  *fin;
-char  *fmt;
-FILE  *fout;
+int
+checkheader(
+	FILE  *fin,
+	char  fmt[MAXFMTLEN],
+	FILE  *fout
+)
 {
 	struct check	cdat;
+	char	*cp;
 
 	cdat.fp = fout;
 	cdat.fs[0] = '\0';
 	if (getheader(fin, mycheck, &cdat) < 0)
 		return(-1);
-	if (cdat.fs[0] != '\0')
-		return(copymatch(fmt, cdat.fs) ? 1 : -1);
-	return(0);
+	if (!cdat.fs[0])
+		return(0);
+	for (cp = fmt; *cp; cp++)		/* check for globbing */
+		if ((*cp == '?') | (*cp == '*')) {
+			if (globmatch(fmt, cdat.fs)) {
+				strcpy(fmt, cdat.fs);
+				return(1);
+			} else
+				return(-1);
+		}
+	return(strcmp(fmt, cdat.fs) ? -1 : 1);	/* literal match */
 }