From 74bedb5e3a736f745ac63dc31db6fbb5dd62d329 Mon Sep 17 00:00:00 2001
From: SuperNovaa41 <supernovaa41@gmx.com>
Date: Wed, 12 Feb 2025 12:59:04 -0500
Subject: [PATCH] adds offset flag

---
 src/hex.c         | 4 +++-
 src/include/hex.h | 2 ++
 src/main.c        | 4 ++++
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/hex.c b/src/hex.c
index f90d480..b9e0748 100644
--- a/src/hex.c
+++ b/src/hex.c
@@ -16,6 +16,8 @@ void init_flags(struct flags* flags)
 	flags->customcols = false;
 	flags->coloured = true;
 
+	flags->offset = 0;
+
 	flags->octets = 2;
 	flags->len = -1; // -1 means til EOF
 	flags->uppercase = false;
@@ -154,7 +156,7 @@ static void c_output(char** text, FILE* stream)
 void display_hex_chunk(hex_chunk_t* chunk, FILE* stream)
 {
 	if (!flags.postscript && !flags.c_style)
-		write_offset(chunk->line * flags.cols, stream);
+		write_offset((chunk->line * flags.cols) + flags.offset, stream);
 
 	if (flags.c_style)
 		c_output(&(chunk->hex), stream);
diff --git a/src/include/hex.h b/src/include/hex.h
index 0438ae1..64da916 100644
--- a/src/include/hex.h
+++ b/src/include/hex.h
@@ -26,6 +26,8 @@ struct flags {
 	
 	uint cols; // choose the amount of columns to display (default 16) // done
 	bool customcols;
+
+	uint offset;
 	
 	uint octets; // number of octets per line (default 2) // done
 	int len; // max len to stop at //done 
diff --git a/src/main.c b/src/main.c
index a1a5a4b..c871d5a 100644
--- a/src/main.c
+++ b/src/main.c
@@ -22,6 +22,7 @@ static struct argp_option options[] = {
 	{0, 'i', 0, 0, "output in C include file style.", 0},
 	{0, 'C', 0, 0, "capitalize variable names in C include file style (-i).", 0},
 	{0, 'n', "name", 0, "set the variable name used in C include output (-i).", 0},
+	{0, 'o', "off", 0, "add <off> to the displayed file position.", 0},
 	{0}
 };
 
@@ -42,6 +43,9 @@ static error_t parse_opt(int key, char* arg, struct argp_state* state)
 		case 'g':
 			flags->octets = atoi(arg);
 			break;
+		case 'o':
+			flags->offset = atoi(arg);
+			break;
 		case 'R':
 			if (strcmp(arg, "none") == 0)
 				flags->coloured = false;