From 53329b73a3f1e2082253674eb9f2890f74ab11c9 Mon Sep 17 00:00:00 2001
From: "raphael.bach" <raphael.bach@etu.hesge.ch>
Date: Sun, 20 Jan 2019 23:44:36 +0100
Subject: [PATCH] Add Sparse_GuessBlockSize()
---
include/sparse.h | 4 ++++
src/sparse.c | 18 ++++++++++++++++++
2 files changed, 22 insertions(+)
diff --git a/include/sparse.h b/include/sparse.h
index 635f05d..3d2d8f6 100644
--- a/include/sparse.h
+++ b/include/sparse.h
@@ -157,6 +157,10 @@ void Sparse_PrintChunkHeader(const struct Sparse_Chunk * const header);
Sparse_DumpInfo()
------------------------------------------------------------------------------*/
void Sparse_DumpInfo(const struct Sparse * const sparse);
+/*------------------------------------------------------------------------------
+ Sparse_GuessBlockSize()
+------------------------------------------------------------------------------*/
+size_t Sparse_GuessBlockSize(size_t img_size);
/*==============================================================================
GUARD
==============================================================================*/
diff --git a/src/sparse.c b/src/sparse.c
index 0450a87..abef8ee 100644
--- a/src/sparse.c
+++ b/src/sparse.c
@@ -58,6 +58,9 @@ static struct Logger s_logger = {
.level_flag = LOG_LEVEL_ALL,
.output = LOG_OUTPUT_STDERR
};
+static const size_t s_block_size_list[] = {
+ 4096, 2048, 1024
+};
/*==============================================================================
PUBLIC FUNCTION DEFINITION
==============================================================================*/
@@ -333,3 +336,18 @@ void Sparse_DumpInfo(const struct Sparse * const sparse)
printf("%zu\n" , (sparse->chunks + i)->size + CHUNK_HEADER_SIZE);
}
}
+/*------------------------------------------------------------------------------
+ Sparse_GuessBlockSize()
+------------------------------------------------------------------------------*/
+size_t Sparse_GuessBlockSize(size_t img_size)
+{
+ size_t block_size = 0;
+ size_t array_size = sizeof(s_block_size_list) / sizeof(size_t);
+ for(size_t i = 0; i < array_size; i++) {
+ if((img_size % s_block_size_list[i]) == 0) {
+ block_size = s_block_size_list[i];
+ break;
+ }
+ }
+ return block_size;
+}
--
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