skinparser lib: some const correctness and marking of local vars as 'static'

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27635 a1c6a512-1295-4272-9138-f99709370657

lib/skin_parser/skin_parser.c

@@ -466,7 +466,7 @@ static int skin_parse_tag(struct skin_element* element, char** document)
 
     char tag_name[3];
     char* tag_args;
-    struct tag_info *tag;
+    const struct tag_info *tag;
 
     int num_args = 1;
     int i;

lib/skin_parser/skin_parser.h

@@ -101,7 +101,7 @@ struct skin_element
     void* data;
 
     /* The tag or conditional name */
-    struct tag_info *tag;
+    const struct tag_info *tag;
 
     /* Pointer to and size of an array of parameters */
     int params_count;

lib/skin_parser/tag_table.c

@@ -24,7 +24,7 @@
 #include <string.h>
 #define BAR_PARAMS "*|iiiis"
 /* The tag definition table */
-struct tag_info legal_tags[] = 
+static const struct tag_info legal_tags[] = 
 {
     { SKIN_TOKEN_ALIGN_CENTER,          "ac", "", 0 },
     { SKIN_TOKEN_ALIGN_LEFT,            "al", "", 0 },
@@ -214,16 +214,16 @@ struct tag_info legal_tags[] =
 };
 
 /* A table of legal escapable characters */
-char legal_escape_characters[] = "%(,);#<|>";
+static const char legal_escape_characters[] = "%(,);#<|>";
 
 /*
  * Just does a straight search through the tag table to find one by
  * the given name
  */
-struct tag_info* find_tag(char* name)
+const struct tag_info* find_tag(const char* name)
 {
     
-    struct tag_info* current = legal_tags;
+    const struct tag_info* current = legal_tags;
     
     /* 
      * Continue searching so long as we have a non-empty name string
@@ -244,7 +244,7 @@ struct tag_info* find_tag(char* name)
 /* Searches through the legal escape characters string */
 int find_escape_character(char lookup)
 {
-    char* current = legal_escape_characters;
+    const char* current = legal_escape_characters;
     while(*current != lookup && *current != '\0')
         current++;
 

lib/skin_parser/tag_table.h

@@ -303,7 +303,7 @@ struct tag_info
  * Finds a tag by name and returns its parameter list, or an empty
  * string if the tag is not found in the table
  */
-struct tag_info* find_tag(char* name);
+const struct tag_info* find_tag(const char* name);
 
 /*
  * Determines whether a character is legal to escape or not.  If