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/applypatch.cpp | 37 +++++++++++++++--------------- applypatch/bspatch.cpp | 8 +++---- applypatch/imgpatch.cpp | 17 +++++++------- applypatch/include/applypatch/applypatch.h | 18 ++++++--------- applypatch/include/applypatch/imgpatch.h | 7 +++--- 5 files changed, 40 insertions(+), 47 deletions(-) (limited to 'applypatch') diff --git a/applypatch/applypatch.cpp b/applypatch/applypatch.cpp index 7be3fdbde..06b8e3120 100644 --- a/applypatch/applypatch.cpp +++ b/applypatch/applypatch.cpp @@ -42,7 +42,7 @@ #include "print_sha1.h" static int LoadPartitionContents(const std::string& filename, FileContents* file); -static ssize_t FileSink(const unsigned char* data, ssize_t len, void* token); +static size_t FileSink(const unsigned char* data, size_t len, void* token); static int GenerateTarget(const FileContents& source_file, const std::unique_ptr& patch, const std::string& target_filename, const uint8_t target_sha1[SHA_DIGEST_LENGTH], const Value* bonus_data); @@ -194,8 +194,8 @@ int SaveFileContents(const char* filename, const FileContents* file) { return -1; } - ssize_t bytes_written = FileSink(file->data.data(), file->data.size(), &fd); - if (bytes_written != static_cast(file->data.size())) { + size_t bytes_written = FileSink(file->data.data(), file->data.size(), &fd); + if (bytes_written != file->data.size()) { printf("short write of \"%s\" (%zd bytes of %zu): %s\n", filename, bytes_written, file->data.size(), strerror(errno)); return -1; @@ -433,25 +433,24 @@ int ShowLicenses() { return 0; } -ssize_t FileSink(const unsigned char* data, ssize_t len, void* token) { - int fd = *static_cast(token); - ssize_t done = 0; - ssize_t wrote; - while (done < len) { - wrote = TEMP_FAILURE_RETRY(ota_write(fd, data+done, len-done)); - if (wrote == -1) { - printf("error writing %zd bytes: %s\n", (len-done), strerror(errno)); - return done; - } - done += wrote; +static size_t FileSink(const unsigned char* data, size_t len, void* token) { + int fd = *static_cast(token); + size_t done = 0; + while (done < len) { + ssize_t wrote = TEMP_FAILURE_RETRY(ota_write(fd, data + done, len - done)); + if (wrote == -1) { + printf("error writing %zd bytes: %s\n", (len - done), strerror(errno)); + return done; } - return done; + done += wrote; + } + return done; } -ssize_t MemorySink(const unsigned char* data, ssize_t len, void* token) { - std::string* s = static_cast(token); - s->append(reinterpret_cast(data), len); - return len; +size_t MemorySink(const unsigned char* data, size_t len, void* token) { + std::string* s = static_cast(token); + s->append(reinterpret_cast(data), len); + return len; } // Return the amount of free space (in bytes) on the filesystem diff --git a/applypatch/bspatch.cpp b/applypatch/bspatch.cpp index 9920c2be1..8ef7a068d 100644 --- a/applypatch/bspatch.cpp +++ b/applypatch/bspatch.cpp @@ -60,8 +60,8 @@ void ShowBSDiffLicense() { ); } -int ApplyBSDiffPatch(const unsigned char* old_data, ssize_t old_size, const Value* patch, - ssize_t patch_offset, SinkFn sink, void* token, SHA_CTX* ctx) { +int ApplyBSDiffPatch(const unsigned char* old_data, size_t old_size, const Value* patch, + size_t patch_offset, SinkFn sink, void* token, SHA_CTX* ctx) { auto sha_sink = [&](const uint8_t* data, size_t len) { len = sink(data, len, token); if (ctx) SHA1_Update(ctx, data, len); @@ -72,8 +72,8 @@ int ApplyBSDiffPatch(const unsigned char* old_data, ssize_t old_size, const Valu patch->data.size(), sha_sink); } -int ApplyBSDiffPatchMem(const unsigned char* old_data, ssize_t old_size, const Value* patch, - ssize_t patch_offset, std::vector* new_data) { +int ApplyBSDiffPatchMem(const unsigned char* old_data, size_t old_size, const Value* patch, + size_t patch_offset, std::vector* new_data) { auto vector_sink = [new_data](const uint8_t* data, size_t len) { new_data->insert(new_data->end(), data, data + len); return len; 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); diff --git a/applypatch/include/applypatch/applypatch.h b/applypatch/include/applypatch/applypatch.h index 4489decb6..52fb58287 100644 --- a/applypatch/include/applypatch/applypatch.h +++ b/applypatch/include/applypatch/applypatch.h @@ -41,7 +41,7 @@ struct FileContents { // and use it as the source instead. #define CACHE_TEMP_SOURCE "/cache/saved.file" -typedef ssize_t (*SinkFn)(const unsigned char*, ssize_t, void*); +using SinkFn = size_t (*)(const unsigned char*, size_t, void*); // applypatch.cpp int ShowLicenses(); @@ -66,18 +66,14 @@ int SaveFileContents(const char* filename, const FileContents* file); // bspatch.cpp void ShowBSDiffLicense(); -int ApplyBSDiffPatch(const unsigned char* old_data, ssize_t old_size, - const Value* patch, ssize_t patch_offset, - SinkFn sink, void* token, SHA_CTX* ctx); -int ApplyBSDiffPatchMem(const unsigned char* old_data, ssize_t old_size, - const Value* patch, ssize_t patch_offset, - std::vector* new_data); +int ApplyBSDiffPatch(const unsigned char* old_data, size_t old_size, const Value* patch, + size_t patch_offset, SinkFn sink, void* token, SHA_CTX* ctx); +int ApplyBSDiffPatchMem(const unsigned char* old_data, size_t old_size, const Value* patch, + size_t patch_offset, std::vector* new_data); // imgpatch.cpp -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); // freecache.cpp int MakeFreeSpaceOnCache(size_t bytes_needed); diff --git a/applypatch/include/applypatch/imgpatch.h b/applypatch/include/applypatch/imgpatch.h index 6549f79f0..16e4c4f57 100644 --- a/applypatch/include/applypatch/imgpatch.h +++ b/applypatch/include/applypatch/imgpatch.h @@ -19,10 +19,9 @@ #include -using SinkFn = ssize_t (*)(const unsigned char*, ssize_t, void*); +using SinkFn = size_t (*)(const unsigned char*, size_t, void*); -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); #endif // _APPLYPATCH_IMGPATCH_H -- cgit v1.2.3