diff --git a/applypatch/imgpatch.cpp b/applypatch/imgpatch.cpp
index 1c4409e..ae6071f 100644
--- a/applypatch/imgpatch.cpp
+++ b/applypatch/imgpatch.cpp
@@ -14,32 +14,34 @@
  * limitations under the License.
  */
 
-// See imgdiff.c in this directory for a description of the patch file
+// See imgdiff.cpp in this directory for a description of the patch file
 // format.
 
+#include <applypatch/imgpatch.h>
+
+#include <errno.h>
 #include <stdio.h>
+#include <string.h>
 #include <sys/cdefs.h>
 #include <sys/stat.h>
-#include <errno.h>
 #include <unistd.h>
-#include <string.h>
 
 #include <string>
 #include <vector>
 
-#include "zlib.h"
-#include "openssl/sha.h"
-#include "applypatch/applypatch.h"
-#include "imgdiff.h"
+#include <applypatch/applypatch.h>
+#include <applypatch/imgdiff.h>
+#include <openssl/sha.h>
+#include <zlib.h>
+
 #include "utils.h"
 
 int ApplyImagePatch(const unsigned char* old_data, ssize_t old_size,
                     const unsigned char* patch_data, ssize_t patch_size,
                     SinkFn sink, void* token) {
-    Value patch(VAL_BLOB, std::string(
-            reinterpret_cast<const char*>(patch_data), patch_size));
+  Value patch(VAL_BLOB, std::string(reinterpret_cast<const char*>(patch_data), patch_size));
 
-    return ApplyImagePatch(old_data, old_size, &patch, sink, token, nullptr, nullptr);
+  return ApplyImagePatch(old_data, old_size, &patch, sink, token, nullptr, nullptr);
 }
 
 /*
@@ -48,208 +50,201 @@
  * 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) {
-    if (patch->data.size() < 12) {
-        printf("patch too short to contain header\n");
+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) {
+  if (patch->data.size() < 12) {
+    printf("patch too short to contain header\n");
+    return -1;
+  }
+
+  // IMGDIFF2 uses CHUNK_NORMAL, CHUNK_DEFLATE, and CHUNK_RAW.
+  // (IMGDIFF1, which is no longer supported, used CHUNK_NORMAL and
+  // CHUNK_GZIP.)
+  size_t pos = 12;
+  const char* header = &patch->data[0];
+  if (memcmp(header, "IMGDIFF2", 8) != 0) {
+    printf("corrupt patch file header (magic number)\n");
+    return -1;
+  }
+
+  int num_chunks = Read4(header + 8);
+
+  for (int i = 0; i < num_chunks; ++i) {
+    // each chunk's header record starts with 4 bytes.
+    if (pos + 4 > patch->data.size()) {
+      printf("failed to read chunk %d record\n", i);
+      return -1;
+    }
+    int type = Read4(&patch->data[pos]);
+    pos += 4;
+
+    if (type == CHUNK_NORMAL) {
+      const char* normal_header = &patch->data[pos];
+      pos += 24;
+      if (pos > patch->data.size()) {
+        printf("failed to read chunk %d normal header data\n", i);
         return -1;
-    }
+      }
 
-    // IMGDIFF2 uses CHUNK_NORMAL, CHUNK_DEFLATE, and CHUNK_RAW.
-    // (IMGDIFF1, which is no longer supported, used CHUNK_NORMAL and
-    // CHUNK_GZIP.)
-    size_t pos = 12;
-    const char* header = &patch->data[0];
-    if (memcmp(header, "IMGDIFF2", 8) != 0) {
-        printf("corrupt patch file header (magic number)\n");
+      size_t src_start = Read8(normal_header);
+      size_t src_len = Read8(normal_header + 8);
+      size_t patch_offset = Read8(normal_header + 16);
+
+      if (src_start + src_len > static_cast<size_t>(old_size)) {
+        printf("source data too short\n");
         return -1;
-    }
+      }
+      ApplyBSDiffPatch(old_data + src_start, src_len, patch, patch_offset, sink, token, ctx);
+    } else if (type == CHUNK_RAW) {
+      const char* raw_header = &patch->data[pos];
+      pos += 4;
+      if (pos > patch->data.size()) {
+        printf("failed to read chunk %d raw header data\n", i);
+        return -1;
+      }
 
-    int num_chunks = Read4(header+8);
+      ssize_t data_len = Read4(raw_header);
 
-    for (int i = 0; i < num_chunks; ++i) {
-        // each chunk's header record starts with 4 bytes.
-        if (pos + 4 > patch->data.size()) {
-            printf("failed to read chunk %d record\n", i);
-            return -1;
+      if (pos + data_len > patch->data.size()) {
+        printf("failed to read chunk %d raw data\n", i);
+        return -1;
+      }
+      if (ctx) SHA1_Update(ctx, &patch->data[pos], data_len);
+      if (sink(reinterpret_cast<const unsigned char*>(&patch->data[pos]), data_len, token) !=
+          data_len) {
+        printf("failed to write chunk %d raw data\n", i);
+        return -1;
+      }
+      pos += data_len;
+    } else if (type == CHUNK_DEFLATE) {
+      // deflate chunks have an additional 60 bytes in their chunk header.
+      const char* deflate_header = &patch->data[pos];
+      pos += 60;
+      if (pos > patch->data.size()) {
+        printf("failed to read chunk %d deflate header data\n", i);
+        return -1;
+      }
+
+      size_t src_start = Read8(deflate_header);
+      size_t src_len = Read8(deflate_header + 8);
+      size_t patch_offset = Read8(deflate_header + 16);
+      size_t expanded_len = Read8(deflate_header + 24);
+      size_t target_len = Read8(deflate_header + 32);
+      int level = Read4(deflate_header + 40);
+      int method = Read4(deflate_header + 44);
+      int windowBits = Read4(deflate_header + 48);
+      int memLevel = Read4(deflate_header + 52);
+      int strategy = Read4(deflate_header + 56);
+
+      if (src_start + src_len > static_cast<size_t>(old_size)) {
+        printf("source data too short\n");
+        return -1;
+      }
+
+      // Decompress the source data; the chunk header tells us exactly
+      // how big we expect it to be when decompressed.
+
+      // Note: expanded_len will include the bonus data size if
+      // the patch was constructed with bonus data.  The
+      // deflation will come up 'bonus_size' bytes short; these
+      // must be appended from the bonus_data value.
+      size_t bonus_size = (i == 1 && bonus_data != NULL) ? bonus_data->data.size() : 0;
+
+      std::vector<unsigned char> expanded_source(expanded_len);
+
+      // inflate() doesn't like strm.next_out being a nullptr even with
+      // avail_out being zero (Z_STREAM_ERROR).
+      if (expanded_len != 0) {
+        z_stream strm;
+        strm.zalloc = Z_NULL;
+        strm.zfree = Z_NULL;
+        strm.opaque = Z_NULL;
+        strm.avail_in = src_len;
+        strm.next_in = const_cast<unsigned char*>(old_data + src_start);
+        strm.avail_out = expanded_len;
+        strm.next_out = expanded_source.data();
+
+        int ret = inflateInit2(&strm, -15);
+        if (ret != Z_OK) {
+          printf("failed to init source inflation: %d\n", ret);
+          return -1;
         }
-        int type = Read4(&patch->data[pos]);
-        pos += 4;
 
-        if (type == CHUNK_NORMAL) {
-            const char* normal_header = &patch->data[pos];
-            pos += 24;
-            if (pos > patch->data.size()) {
-                printf("failed to read chunk %d normal header data\n", i);
-                return -1;
-            }
-
-            size_t src_start = Read8(normal_header);
-            size_t src_len = Read8(normal_header+8);
-            size_t patch_offset = Read8(normal_header+16);
-
-            if (src_start + src_len > static_cast<size_t>(old_size)) {
-                printf("source data too short\n");
-                return -1;
-            }
-            ApplyBSDiffPatch(old_data + src_start, src_len,
-                             patch, patch_offset, sink, token, ctx);
-        } else if (type == CHUNK_RAW) {
-            const char* raw_header = &patch->data[pos];
-            pos += 4;
-            if (pos > patch->data.size()) {
-                printf("failed to read chunk %d raw header data\n", i);
-                return -1;
-            }
-
-            ssize_t data_len = Read4(raw_header);
-
-            if (pos + data_len > patch->data.size()) {
-                printf("failed to read chunk %d raw data\n", i);
-                return -1;
-            }
-            if (ctx) SHA1_Update(ctx, &patch->data[pos], data_len);
-            if (sink(reinterpret_cast<const unsigned char*>(&patch->data[pos]),
-                     data_len, token) != data_len) {
-                printf("failed to write chunk %d raw data\n", i);
-                return -1;
-            }
-            pos += data_len;
-        } else if (type == CHUNK_DEFLATE) {
-            // deflate chunks have an additional 60 bytes in their chunk header.
-            const char* deflate_header = &patch->data[pos];
-            pos += 60;
-            if (pos > patch->data.size()) {
-                printf("failed to read chunk %d deflate header data\n", i);
-                return -1;
-            }
-
-            size_t src_start = Read8(deflate_header);
-            size_t src_len = Read8(deflate_header+8);
-            size_t patch_offset = Read8(deflate_header+16);
-            size_t expanded_len = Read8(deflate_header+24);
-            size_t target_len = Read8(deflate_header+32);
-            int level = Read4(deflate_header+40);
-            int method = Read4(deflate_header+44);
-            int windowBits = Read4(deflate_header+48);
-            int memLevel = Read4(deflate_header+52);
-            int strategy = Read4(deflate_header+56);
-
-            if (src_start + src_len > static_cast<size_t>(old_size)) {
-                printf("source data too short\n");
-                return -1;
-            }
-
-            // Decompress the source data; the chunk header tells us exactly
-            // how big we expect it to be when decompressed.
-
-            // Note: expanded_len will include the bonus data size if
-            // the patch was constructed with bonus data.  The
-            // deflation will come up 'bonus_size' bytes short; these
-            // must be appended from the bonus_data value.
-            size_t bonus_size = (i == 1 && bonus_data != NULL) ? bonus_data->data.size() : 0;
-
-            std::vector<unsigned char> expanded_source(expanded_len);
-
-            // inflate() doesn't like strm.next_out being a nullptr even with
-            // avail_out being zero (Z_STREAM_ERROR).
-            if (expanded_len != 0) {
-                z_stream strm;
-                strm.zalloc = Z_NULL;
-                strm.zfree = Z_NULL;
-                strm.opaque = Z_NULL;
-                strm.avail_in = src_len;
-                strm.next_in = (unsigned char*)(old_data + src_start);
-                strm.avail_out = expanded_len;
-                strm.next_out = expanded_source.data();
-
-                int ret;
-                ret = inflateInit2(&strm, -15);
-                if (ret != Z_OK) {
-                    printf("failed to init source inflation: %d\n", ret);
-                    return -1;
-                }
-
-                // Because we've provided enough room to accommodate the output
-                // data, we expect one call to inflate() to suffice.
-                ret = inflate(&strm, Z_SYNC_FLUSH);
-                if (ret != Z_STREAM_END) {
-                    printf("source inflation returned %d\n", ret);
-                    return -1;
-                }
-                // We should have filled the output buffer exactly, except
-                // for the bonus_size.
-                if (strm.avail_out != bonus_size) {
-                    printf("source inflation short by %zu bytes\n", strm.avail_out-bonus_size);
-                    return -1;
-                }
-                inflateEnd(&strm);
-
-                if (bonus_size) {
-                    memcpy(expanded_source.data() + (expanded_len - bonus_size),
-                           &bonus_data->data[0], bonus_size);
-                }
-            }
-
-            // Next, apply the bsdiff patch (in memory) to the uncompressed
-            // data.
-            std::vector<unsigned char> uncompressed_target_data;
-            if (ApplyBSDiffPatchMem(expanded_source.data(), expanded_len,
-                                    patch, patch_offset,
-                                    &uncompressed_target_data) != 0) {
-                return -1;
-            }
-            if (uncompressed_target_data.size() != target_len) {
-                printf("expected target len to be %zu, but it's %zu\n",
-                       target_len, uncompressed_target_data.size());
-                return -1;
-            }
-
-            // Now compress the target data and append it to the output.
-
-            // we're done with the expanded_source data buffer, so we'll
-            // reuse that memory to receive the output of deflate.
-            if (expanded_source.size() < 32768U) {
-                expanded_source.resize(32768U);
-            }
-
-            {
-                std::vector<unsigned char>& temp_data = expanded_source;
-
-                // now the deflate stream
-                z_stream strm;
-                strm.zalloc = Z_NULL;
-                strm.zfree = Z_NULL;
-                strm.opaque = Z_NULL;
-                strm.avail_in = uncompressed_target_data.size();
-                strm.next_in = uncompressed_target_data.data();
-                int ret = deflateInit2(&strm, level, method, windowBits, memLevel, strategy);
-                if (ret != Z_OK) {
-                    printf("failed to init uncompressed data deflation: %d\n", ret);
-                    return -1;
-                }
-                do {
-                    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;
-
-                    if (sink(temp_data.data(), have, token) != have) {
-                        printf("failed to write %zd compressed bytes to output\n",
-                               have);
-                        return -1;
-                    }
-                    if (ctx) SHA1_Update(ctx, temp_data.data(), have);
-                } while (ret != Z_STREAM_END);
-                deflateEnd(&strm);
-            }
-        } else {
-            printf("patch chunk %d is unknown type %d\n", i, type);
-            return -1;
+        // Because we've provided enough room to accommodate the output
+        // data, we expect one call to inflate() to suffice.
+        ret = inflate(&strm, Z_SYNC_FLUSH);
+        if (ret != Z_STREAM_END) {
+          printf("source inflation returned %d\n", ret);
+          return -1;
         }
-    }
+        // We should have filled the output buffer exactly, except
+        // for the bonus_size.
+        if (strm.avail_out != bonus_size) {
+          printf("source inflation short by %zu bytes\n", strm.avail_out - bonus_size);
+          return -1;
+        }
+        inflateEnd(&strm);
 
-    return 0;
+        if (bonus_size) {
+          memcpy(expanded_source.data() + (expanded_len - bonus_size), &bonus_data->data[0],
+                 bonus_size);
+        }
+      }
+
+      // Next, apply the bsdiff patch (in memory) to the uncompressed data.
+      std::vector<unsigned char> uncompressed_target_data;
+      if (ApplyBSDiffPatchMem(expanded_source.data(), expanded_len, patch, patch_offset,
+                              &uncompressed_target_data) != 0) {
+        return -1;
+      }
+      if (uncompressed_target_data.size() != target_len) {
+        printf("expected target len to be %zu, but it's %zu\n", target_len,
+               uncompressed_target_data.size());
+        return -1;
+      }
+
+      // Now compress the target data and append it to the output.
+
+      // we're done with the expanded_source data buffer, so we'll
+      // reuse that memory to receive the output of deflate.
+      if (expanded_source.size() < 32768U) {
+        expanded_source.resize(32768U);
+      }
+
+      {
+        std::vector<unsigned char>& temp_data = expanded_source;
+
+        // now the deflate stream
+        z_stream strm;
+        strm.zalloc = Z_NULL;
+        strm.zfree = Z_NULL;
+        strm.opaque = Z_NULL;
+        strm.avail_in = uncompressed_target_data.size();
+        strm.next_in = uncompressed_target_data.data();
+        int ret = deflateInit2(&strm, level, method, windowBits, memLevel, strategy);
+        if (ret != Z_OK) {
+          printf("failed to init uncompressed data deflation: %d\n", ret);
+          return -1;
+        }
+        do {
+          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;
+
+          if (sink(temp_data.data(), have, token) != have) {
+            printf("failed to write %zd compressed bytes to output\n", have);
+            return -1;
+          }
+          if (ctx) SHA1_Update(ctx, temp_data.data(), have);
+        } while (ret != Z_STREAM_END);
+        deflateEnd(&strm);
+      }
+    } else {
+      printf("patch chunk %d is unknown type %d\n", i, type);
+      return -1;
+    }
+  }
+
+  return 0;
 }