--- ray/src/common/header.c	1996/03/12 11:29:16	2.7
+++ ray/src/common/header.c	2020/07/25 01:10:38	2.40
@@ -1,21 +1,23 @@
-/* Copyright (c) 1994 Regents of the University of California */
-
 #ifndef lint
-static char SCCSid[] = "$SunId$ LBL";
+static const char	RCSid[] = "$Id: header.c,v 2.40 2020/07/25 01:10:38 greg Exp $";
 #endif
-
 /*
  *  header.c - routines for reading and writing information headers.
  *
- *	8/19/88
+ *  Externals declared in rtio.h
  *
  *  newheader(t,fp)	start new information header identified by string t
- *  isheadid(s)		returns true if s is a header id line
  *  headidval(r,s)	copy header identifier value in s to r
+ *  dateval(t,s)	get capture date value as UTC
+ *  gmtval(t,s)		get GMT as UTC
+ *  fputdate(t,fp)	put out the given UTC
+ *  fputnow(fp)		put out the current date and time
  *  printargs(ac,av,fp) print an argument list to fp, followed by '\n'
- *  isformat(s)		returns true if s is of the form "FORMAT=*"
  *  formatval(r,s)	copy the format value in s to r
  *  fputformat(s,fp)	write "FORMAT=%s" to fp
+ *  nativebigendian()	are we native on big-endian machine?
+ *  isbigendian(s)	header line matches "BigEndian=1" (-1 if irrelevant)
+ *  fputendian(fp)	write native endianness in BigEndian= line
  *  getheader(fp,f,p)	read header from fp, calling f(s,p) on each line
  *  globmatch(pat, str)	check for glob match of str against pat
  *  checkheader(i,p,o)	check header format from i against p and copy to o
@@ -23,25 +25,35 @@ static char SCCSid[] = "$SunId$ LBL";
  *  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"
 
-#ifndef BSD
-#define	 index	strchr
-#endif
+#define	 MAXLINE	2048
 
-extern char  *index();
+extern time_t		timegm(struct tm *tm);
 
-char  HDRSTR[] = "#?";		/* information header magic number */
+const char  HDRSTR[] = "#?";		/* information header magic number */
 
-char  FMTSTR[] = "FORMAT=";	/* format identifier */
+const char  FMTSTR[] = "FORMAT=";	/* format identifier */
 
+const char  TMSTR[] = "CAPDATE=";	/* capture date identifier */
+const char  GMTSTR[] = "GMT=";		/* GMT identifier */
 
-newheader(s, fp)		/* identifying line of information header */
-char  *s;
-register FILE  *fp;
+const char  BIGEND[] = "BigEndian=";	/* big-endian variable */
+
+static gethfunc mycheck;
+
+
+void
+newheader(		/* identifying line of information header */
+	const char  *s,
+	FILE  *fp
+)
 {
 	fputs(HDRSTR, fp);
 	fputs(s, fp);
@@ -50,57 +62,134 @@ register FILE  *fp;
 
 
 int
-headidval(r,s)			/* get header id (return true if is id) */
-register char  *r, *s;
+headidval(			/* get header id (return true if is id) */
+	char  *r,
+	const char	*s
+)
 {
-	register char  *cp = HDRSTR;
+	const char  *cp = HDRSTR;
 
 	while (*cp) if (*cp++ != *s++) return(0);
 	if (r == NULL) return(1);
-	while (*s) *r++ = *s++;
+	while (*s && !isspace(*s)) *r++ = *s++;
 	*r = '\0';
 	return(1);
 }
 
 
 int
-isheadid(s)			/* check to see if line is header id */
-char  *s;
+dateval(		/* convert capture date line to UTC */
+	time_t	*tloc,
+	const char	*s
+)
 {
-	return(headidval(NULL, s));
+	struct tm	tms;
+	const char	*cp = TMSTR;
+
+	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;
+	tms.tm_isdst = -1;	/* ask mktime() to figure out DST */
+	*tloc = mktime(&tms);
+	return(1);
 }
 
 
-printargs(ac, av, fp)		/* print arguments to a file */
-int  ac;
-char  **av;
-register FILE  *fp;
+int
+gmtval(			/* convert GMT date line to UTC */
+	time_t	*tloc,
+	const char	*s
+)
 {
-	int  quote;
+	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', fp);
+#endif
 	while (ac-- > 0) {
-		if (index(*av, ' ') != NULL) {		/* quote it */
-			if (index(*av, '\'') != NULL)
-				quote = '"';
-			else
-				quote = '\'';
-			putc(quote, fp);
-			fputs(*av++, fp);
-			putc(quote, fp);
-		} else
-			fputs(*av++, fp);
-		putc(' ', fp);
+		fputword(*av++, fp);
+		fputc(ac ? ' ' : '\n', fp);
 	}
-	putc('\n', fp);
 }
 
 
 int
-formatval(r, s)			/* get format value (return true if format) */
-register char  *r;
-register char  *s;
+formatval(			/* get format value (return true if format) */
+	char  fmt[MAXFMTLEN],
+	const char  *s
+)
 {
-	register char  *cp = FMTSTR;
+	const char  *cp = FMTSTR;
+	char  *r = fmt;
 
 	while (*cp) if (*cp++ != *s++) return(0);
 	while (isspace(*s)) s++;
@@ -108,79 +197,129 @@ register char  *s;
 	if (r == NULL) return(1);
 	do
 		*r++ = *s++;
-	while(*s && !isspace(*s));
+	while (*s && !isspace(*s) && r-fmt < MAXFMTLEN-1);
 	*r = '\0';
 	return(1);
 }
 
 
+void
+fputformat(		/* put out a format value */
+	const char  *s,
+	FILE  *fp
+)
+{
+	fputs(FMTSTR, fp);
+	fputs(s, fp);
+	putc('\n', fp);
+}
+
+
 int
-isformat(s)			/* is line a format line? */
-char  *s;
+nativebigendian()	/* are we native on a big-endian machine? */
 {
-	return(formatval(NULL, s));
+	union { int32 i; char c[4]; } u;
+
+	u.i = 1;
+
+	return(u.c[0] == 0);
 }
 
 
-fputformat(s, fp)		/* put out a format value */
-char  *s;
-FILE  *fp;
+int
+isbigendian(		/* header line says "BigEndian=1" (-1 if irrelevant) */
+	const char *s
+)
 {
-	fputs(FMTSTR, fp);
-	fputs(s, fp);
-	putc('\n', fp);
+	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(fp, f, p)		/* get header from file */
-FILE  *fp;
-int  (*f)();
-char  *p;
+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, MAXLINE, fp) == NULL)
 			return(-1);
-		if (buf[0] == '\n')
-			return(0);
-#ifdef MSDOS
-		if (buf[0] == '\r' && buf[1] == '\n')
-			return(0);
-#endif
+		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 (!formatval(cp->fs, s) && cp->fp != NULL)
-		fputs(s, cp->fp);
+	struct check	*scp = (struct check *)cp;
+
+	if (!formatval(scp->fs, s) && scp->fp != NULL)
+		return(fputs(s, scp->fp));
+
+	return(0);
 }
 
 
 int
-globmatch(pat, str)		/* check for glob match of str against pat */
-char	*pat, *str;
+globmatch(			/* check for match of s against pattern p */
+	const char	*p,
+	const char	*s
+)
 {
-	register char	*p = pat, *s = str;
+	int	setmatch;
 
 	do {
 		switch (*p) {
@@ -191,11 +330,29 @@ char	*pat, *str;
 		case '*':			/* match any string */
 			while (p[1] == '*') p++;
 			do
-				if ( (p[1]=='?' || p[1]==*s) &&
+				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 */
@@ -225,13 +382,14 @@ char	*pat, *str;
  */
 
 int
-checkheader(fin, fmt, fout)
-FILE  *fin;
-char  *fmt;
-FILE  *fout;
+checkheader(
+	FILE  *fin,
+	char  fmt[MAXFMTLEN],
+	FILE  *fout
+)
 {
 	struct check	cdat;
-	register char	*cp;
+	char	*cp;
 
 	cdat.fp = fout;
 	cdat.fs[0] = '\0';
@@ -240,11 +398,12 @@ FILE  *fout;
 	if (!cdat.fs[0])
 		return(0);
 	for (cp = fmt; *cp; cp++)		/* check for globbing */
-		if (*cp == '?' | *cp == '*')
+		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 */
 }