From: Bastian Dehn <hhaalo@arcor.de>
Date: Sat, 10 Feb 2024 06:34:20 +0000 (+0100)
Subject: skip header to read data
X-Git-Tag: v1.0.0^2~308
X-Git-Url: https://gitweb.hhaalo.de/?a=commitdiff_plain;h=f60ef2ce532f628fa1a07cc8bcaa653628dc75c0;p=sane-kds-s2000w-net.git

skip header to read data
---

diff --git a/src/kds_s2000w_net.c b/src/kds_s2000w_net.c
index 3e34832..c372a2a 100644
--- a/src/kds_s2000w_net.c
+++ b/src/kds_s2000w_net.c
@@ -15,6 +15,24 @@ int scan_started = 0;
 int readed_bytes_per_line = 0;
 int readed_lines = 0;
 
+int _sane_kds_s2000w_net_find_first_data_byte(const char* data)
+{
+	const int header_spaces = 3;
+	const char space = 0x0a;
+	int space_count = 0;
+	int byte_count = 0;
+
+	while(space_count < header_spaces) {
+		if (data[byte_count] == space) {
+			space_count++;
+		}
+
+		byte_count++;
+	}
+
+	return byte_count;
+}
+
 SANE_Status _sane_kds_s2000w_net_init(SANE_Int* version_code, SANE_Auth_Callback authorize)
 {
 	*version_code = SANE_VERSION_CODE(1, 0, 0);
@@ -228,7 +246,12 @@ SANE_Status _sane_kds_s2000w_net_read(SANE_Handle handle, SANE_Byte* data,
 	SANE_Int max_length, SANE_Int* length)
 {
 	printf("is all scanned: %i\n", current_metadata.scanned_all_complete);
-	char* image_data = (char*) current_metadata.image;
+
+	int skip_header_bytes = _sane_kds_s2000w_net_find_first_data_byte(current_metadata.image);
+
+	if (read_size <= 0) {
+		read_size += skip_header_bytes;
+	}
 
 	if (readed_lines >= current_metadata.lines ) {
 		printf("Image is loaded\n");
@@ -258,7 +281,7 @@ SANE_Status _sane_kds_s2000w_net_read(SANE_Handle handle, SANE_Byte* data,
 	}
 
 	*length = maxlen;
-	memcpy(data, current_metadata.image + read_size, *length);
+	memcpy(data, current_metadata.image + skip_header_bytes + read_size, *length);
 
 	readed_bytes_per_line += *length;
 	read_size += *length;