From f7eb760fe76cb66c5d5341b03d6a66cc1f06d795 Mon Sep 17 00:00:00 2001 From: Tao Bao Date: Mon, 27 Mar 2017 15:12:48 -0700 Subject: applypatch: Change the ssize_t length parameters to size_t. Mostly for applypatch family APIs like ApplyBSDiffPatch() and ApplyImagePatch(). Changing to size_t doesn't indicate they would necessarily work with very large size_t (e.g. > ssize_t), just similar to write(2). But otherwise accepting negative length doesn't make much sense. Also change the return type of SinkFn from ssize_t to size_t. Callers tell a successful sink by comparing the number of written bytes against the desired value. Negative return values like -1 are not needed. This also makes it consistent with bsdiff::bspatch interface. Test: recovery_component_test Test: Apply an incremental with the new updater. Change-Id: I7ff1615203a5c9854134f75d019e266f4ea6e714 --- applypatch/imgpatch.cpp | 17 ++++++++--------- 1 file changed, 8 insertions(+), 9 deletions(-) (limited to 'applypatch/imgpatch.cpp') diff --git a/applypatch/imgpatch.cpp b/applypatch/imgpatch.cpp index adcc61fd6..7a88ffbbc 100644 --- a/applypatch/imgpatch.cpp +++ b/applypatch/imgpatch.cpp @@ -43,9 +43,8 @@ static inline int32_t Read4(const void *address) { return android::base::get_unaligned(address); } -int ApplyImagePatch(const unsigned char* old_data, ssize_t old_size, - const unsigned char* patch_data, ssize_t patch_size, - SinkFn sink, void* token) { +int ApplyImagePatch(const unsigned char* old_data, size_t old_size, const unsigned char* patch_data, + size_t patch_size, SinkFn sink, void* token) { Value patch(VAL_BLOB, std::string(reinterpret_cast(patch_data), patch_size)); return ApplyImagePatch(old_data, old_size, &patch, sink, token, nullptr, nullptr); @@ -57,8 +56,8 @@ int ApplyImagePatch(const unsigned char* old_data, ssize_t old_size, * file, and update the SHA context with the output data as well. * Return 0 on success. */ -int ApplyImagePatch(const unsigned char* old_data, ssize_t old_size, const Value* patch, - SinkFn sink, void* token, SHA_CTX* ctx, const Value* bonus_data) { +int ApplyImagePatch(const unsigned char* old_data, size_t old_size, const Value* patch, SinkFn sink, + void* token, SHA_CTX* ctx, const Value* bonus_data) { if (patch->data.size() < 12) { printf("patch too short to contain header\n"); return -1; @@ -97,7 +96,7 @@ int ApplyImagePatch(const unsigned char* old_data, ssize_t old_size, const Value size_t src_len = static_cast(Read8(normal_header + 8)); size_t patch_offset = static_cast(Read8(normal_header + 16)); - if (src_start + src_len > static_cast(old_size)) { + if (src_start + src_len > old_size) { printf("source data too short\n"); return -1; } @@ -110,7 +109,7 @@ int ApplyImagePatch(const unsigned char* old_data, ssize_t old_size, const Value return -1; } - ssize_t data_len = Read4(raw_header); + size_t data_len = static_cast(Read4(raw_header)); if (pos + data_len > patch->data.size()) { printf("failed to read chunk %d raw data\n", i); @@ -143,7 +142,7 @@ int ApplyImagePatch(const unsigned char* old_data, ssize_t old_size, const Value int memLevel = Read4(deflate_header + 52); int strategy = Read4(deflate_header + 56); - if (src_start + src_len > static_cast(old_size)) { + if (src_start + src_len > old_size) { printf("source data too short\n"); return -1; } @@ -240,7 +239,7 @@ int ApplyImagePatch(const unsigned char* old_data, ssize_t old_size, const Value strm.avail_out = temp_data.size(); strm.next_out = temp_data.data(); ret = deflate(&strm, Z_FINISH); - ssize_t have = temp_data.size() - strm.avail_out; + size_t have = temp_data.size() - strm.avail_out; if (sink(temp_data.data(), have, token) != have) { printf("failed to write %zd compressed bytes to output\n", have); -- cgit v1.2.3