From 408d8ecbd73cf8dcb4d9af0e3e965534c1aff03f Mon Sep 17 00:00:00 2001
From: Jakob Kaivo <jkk@ung.org>
Date: Wed, 15 Jul 2020 12:38:28 -0400
Subject: add byte counts for use by =/^G

---
 io.c   | 11 +++++++++++
 more.h |  2 ++
 2 files changed, 13 insertions(+)

diff --git a/io.c b/io.c
index 2715e1b..a253792 100644
--- a/io.c
+++ b/io.c
@@ -3,6 +3,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/stat.h>
+#include <unistd.h>
 
 #include "more.h"
 
@@ -16,10 +18,16 @@ ssize_t more_getline(struct more_file *mf, size_t lineno)
 	while (mf->nlines <= lineno) {
 		mf->nlines++;
 		mf->lines = realloc(mf->lines, mf->nlines * sizeof(*mf->lines));
+		mf->bytepos = realloc(mf->bytepos, mf->nlines * sizeof(*mf->bytepos));
 
 		fgetpos(mf->f, &(mf->lines[mf->nlines - 1]));
 
 		getline(&(mf->buf), &(mf->nbuf), mf->f);
+		if (mf->nlines > 1) {
+			mf->bytepos[mf->nlines - 1] = mf->bytepos[mf->nlines - 2] + strlen(mf->buf);
+		} else {
+			mf->bytepos[0] = 0;
+		}
 
 		if (mf->backing != mf->f) {
 			fgetpos(mf->backing, &(mf->lines[mf->nlines - 1]));
@@ -50,6 +58,9 @@ struct more_file more_open(const char *path)
 		mf.backing = tmpfile();
 	} else {
 		mf.backing = mf.f;
+		struct stat st;
+		fstat(fileno(mf.f), &st);
+		mf.nbytes = st.st_size;
 	}
 
 	return mf;
diff --git a/more.h b/more.h
index 8e6e723..27e7e7a 100644
--- a/more.h
+++ b/more.h
@@ -14,6 +14,8 @@ struct more_file {
 	fpos_t *lines;
 	size_t nlines;
 	size_t mark[26];
+	size_t nbytes;
+	size_t *bytepos;
 	char *buf;
 	size_t nbuf;
 };
-- 
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