From 6c88a1f638ea30adbeecdffc40a099b3d7b9f99f Mon Sep 17 00:00:00 2001
From: Andrzej Bialecki <abial@FreeBSD.org>
Date: Mon, 7 Sep 1998 19:00:34 +0000
Subject: Change the way the help files are stored, and save ca. 30kB on the
 "dial" floppy.

Submitted by:	Eric P. Scott <eps@sirius.com>
---
 release/picobsd/tinyware/help/help.c | 163 ++++++++++++++++++++++++-----------
 1 file changed, 111 insertions(+), 52 deletions(-)

(limited to 'release/picobsd/tinyware/help/help.c')

diff --git a/release/picobsd/tinyware/help/help.c b/release/picobsd/tinyware/help/help.c
index fda11a60bb63..ed390324f3c4 100644
--- a/release/picobsd/tinyware/help/help.c
+++ b/release/picobsd/tinyware/help/help.c
@@ -1,5 +1,6 @@
 /*-
- * Copyright (c) 1998 Andrzej Bialecki
+ * Copyright (c) 1998 Eric P. Scott <eps@sirius.com>
+ * Copyright (c) 1998 Andrzej Bialecki <abial@nask.pl>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -23,75 +24,133 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- * $Id: help.c,v 1.1.1.1 1998/07/14 07:30:53 abial Exp $
- *
+ * $Id$
  */
 
 
 #include <stdio.h>
 #include <string.h>
-#include <sys/types.h>
-#include <dirent.h>
+#include <ar.h>
+#include <sys/ioctl.h>
+
+int display(FILE *, const char *);
+
+static int cnt, crt=-1;
 
-void
-display(char *fname)
+int
+main(int argc, char *argv[])
 {
+	register int i, s;
 	FILE *fd;
-	DIR *dirp;
-	struct dirent *d;
-	char buf[100],junk[5],c, *dot;
-	int i;
+	struct ttysize ts;
 
-	snprintf(buf,99,"/help/%s.hlp",fname);
-	if((fd=fopen(buf,"r"))==NULL) {
-		printf("No help available for '%s'.\n",fname);
+	if (!(fd=fopen("/help.a", "r"))) {
+		(void)fputs("Couldn't open help archive.\n", stderr);
 		exit(1);
 	}
-	printf("\n");
-	i=0;
-	while(!feof(fd)) {
-		if(fgets(buf,99,fd)==NULL) continue;
-		if(i<23) {
-			printf("%s",buf);
-			i++;
-		} else {
-			printf("Press Enter to continue");
-			fgets(junk,5,stdin);
-			printf("%s",buf);
-			i=0;
-		}
+	cnt=0;
+	if (ioctl(fileno(stdout), TIOCGWINSZ, &ts)>=0) {
+		crt=ts.ts_lines-1;
 	}
-	printf("\n");
-	i=0;
-	if(strcmp(fname,"help")==0) {
-		printf("The following help items are available:\n\n");
-		dirp=opendir("/help/.");
-		while((d=readdir(dirp))!=NULL) {
-			if(d->d_name[0]=='.') continue;
-			if((dot=strchr(d->d_name,'.'))!=NULL) {
-				*dot='\0';
-			}
-			printf("%-13s",d->d_name);
-			i++;
-			if(i>5) {
-				printf("\n");
-				i=0;
-			}
+	if (crt<3) crt=23;
+	s=display(fd, argc>1 ? argv[1] : "help");
+	if (s<0) s=0;
+	else for (i=2;i<argc;) {
+		rewind(fd);
+		s|=display(fd, argv[i++]);
+		if (s<0) {
+			s=0;
+			break;
 		}
-		closedir(dirp);
-		printf("\n");
 	}
-	return;
+	(void)fclose(fd);
+	exit(s);
 }
 
+int
+more(void)
+{
+	char buf[8];
+
+	(void)fflush(stdout);
+	(void)fputs("\033[7mPress Enter to continue\033[m", stderr);
+	(void)fflush(stderr);
+	cnt=0;
+	if (fgets(buf, sizeof buf, stdin)) return 0;
+	(void)fputc('\n', stderr);
+	return 1;
+}
 
 int
-main(int argc, char *argv[])
+display(FILE *fd, const char *fname)
 {
-	if(argc==1) {
-		display("help");
-	} else {
-		display(argv[1]);
+	register char *p;
+	register int c, n, o;
+	struct ar_hdr ar;
+	char aname[20];
+
+	if (!fgets(aname, sizeof aname, fd)) {
+		return 1;
+	}
+	if (strncmp(aname, ARMAG, SARMAG)) return 1;
+	(void)sprintf(aname, "%-16.16s", fname);
+	for (;;) {
+		if (fread((void *)&ar, sizeof ar, 1, fd)!=1) return 1;
+		if (strncmp(ar.ar_fmag, ARFMAG, 2)) return 1;
+		n=0;
+		p=ar.ar_size;
+		do {
+			if ((c=(int)(*p++-'0'))<0||c>9) break;
+			n*=10; n+=c;
+		} while (p<&ar.ar_size[sizeof ar.ar_size]);
+		if (!strncmp(ar.ar_name, aname, 16)) break;
+		if (fseek(fd, (long)n, SEEK_CUR)<0) return 1;
+		if ((n&1)&&fgetc(fd)!='\n') return 1;
+	}
+	if (cnt>=crt&&more()) return -1;
+	(void)fputc('\n', stdout);
+	cnt++;
+	o=0; while (o<n&&(c=fgetc(fd))!=EOF) {
+	per:
+		o++;
+		(void)fputc(c, stdout);
+		if (c!='\n') continue;
+		if (++cnt<crt) continue;
+		if (o>=n||(c=fgetc(fd))==EOF) break;
+		if (more()) return -1;
+		goto per;
+	}
+	if (cnt>=crt&&more()) return -1;
+	(void)fputc('\n', stdout);
+	cnt++;
+	if (!strcmp(fname, "help")) {
+		rewind(fd);
+		(void)fgets(aname, sizeof aname, fd);
+		if (cnt>=crt&&more()) return -1;
+		(void)fputs("The following help items are available:\n",
+			stdout);
+		cnt++;
+		o=0;
+		while (fread((void *)&ar, sizeof ar, 1, fd)==1) {
+			if (strncmp(ar.ar_fmag, ARFMAG, 2)) break;
+			if ((o%6)==0) {
+				(void)fputc('\n', stdout);
+				if (++cnt>=crt&&more()) return -1;
+			}
+			(void)printf("%.13s", ar.ar_name);
+			++o;
+			n=0;
+			p=ar.ar_size;
+			do {
+				if ((c=(int)(*p++-'0'))<0||c>9) break;
+				n*=10; n+=c;
+			} while (p<&ar.ar_size[sizeof ar.ar_size]);
+			if (fseek(fd, (long)n, SEEK_CUR)<0) break;
+			if ((n&1)&&fgetc(fd)!='\n') break;
+		}
+		if (cnt>=crt&&more()) return -1;
+		(void)fputc('\n', stdout);
+		cnt++;
 	}
-	exit(0);
+	return 0;
 }
-- 
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