Allow yaml file to specify default compression for images

utility/bmpblk_utility.cc

 // Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // Utility for manipulating firmware screen block (BMPBLOCK) in GBB.
 //
 
 #include "bmpblk_utility.h"
 
 #include <assert.h>
@@ skipping 121 matching lines @@
   yaml_event_t event;
   string keyword;
   expect_event(parser, YAML_MAPPING_START_EVENT);
   for (;;) {
     yaml_parser_parse(parser, &event);
     switch (event.type) {
       case YAML_SCALAR_EVENT:
         keyword = (char*)event.data.scalar.value;
         if (keyword == "bmpblock") {
           parse_bmpblock(parser);
+        } else if (keyword == "compression") {
+          parse_compression(parser);
         } else if (keyword == "images") {
           parse_images(parser);
         } else if (keyword == "screens") {
           parse_screens(parser);
         } else if (keyword == "localizations") {
           parse_localizations(parser);
         }
         break;
       case YAML_MAPPING_END_EVENT:
         yaml_event_delete(&event);
@@ skipping 15 matching lines @@
   sprintf(wantversion, "%d.%d",
           BMPBLOCK_MAJOR_VERSION,
           BMPBLOCK_MINOR_VERSION);
   string gotversion = (char*)event.data.scalar.value;
   if (gotversion != wantversion) {
     error("Invalid version specified in config file\n");
   }
   yaml_event_delete(&event);
 }
 
+void BmpBlockUtil::parse_compression(yaml_parser_t *parser) {
+  yaml_event_t event;
+  yaml_parser_parse(parser, &event);
+  if (event.type != YAML_SCALAR_EVENT) {
+    error("Syntax error in parsing bmpblock.\n");
+  }
+  char *comp_str = (char *)event.data.scalar.value;
+  char *e = 0;
+  uint32_t comp = (uint32_t)strtoul(comp_str, &e, 0);
+  if (!*comp_str || (e && *e) || comp >= MAX_COMPRESS) {
+    error("Invalid compression specified in config file\n");
+  }
+  if (!set_compression_) {
+    compression_ = comp;
+  }
+  yaml_event_delete(&event);
+}
+
 void BmpBlockUtil::parse_images(yaml_parser_t *parser) {
   yaml_event_t event;
   string image_name, image_filename;
   expect_event(parser, YAML_MAPPING_START_EVENT);
   for (;;) {
     yaml_parser_parse(parser, &event);
     switch (event.type) {
       case YAML_SCALAR_EVENT:
         image_name = (char*)event.data.scalar.value;
         yaml_event_delete(&event);
@@ skipping 494 matching lines @@
   else if (extract_mode) {
     return dump_bmpblock(bmpblock_fn, 1, extract_dir, overwrite);
   } else {
     return dump_bmpblock(bmpblock_fn, show_as_yaml, 0, 0);
   }
 
   return 0;
 }
 
 #endif  // WITH_UTIL_MAIN