Changes codes

1) Changed buffer size for file size
   Changes a internal buffer size from size_t to offt_t.
   It is a bug for 32 bit OS enviroment.



git-svn-id: http://s3fs.googlecode.com/svn/trunk@496 df820570-a93a-0410-bd06-b72b767a4274

src/string_util.cpp

@@ -32,6 +32,49 @@ using namespace std;
 
 static const char hexAlphabet[] = "0123456789ABCDEF";
 
+off_t s3fs_strtoofft(const char* str, bool is_base_16)
+{
+  if(!str || '\0' == *str){
+    return 0;
+  }
+  off_t  result;
+  bool   chk_space;
+  bool   chk_base16_prefix;
+  for(result = 0, chk_space = false, chk_base16_prefix = false; '\0' != *str; str++){
+    // check head space
+    if(!chk_space && isspace(*str)){
+      continue;
+    }else if(!chk_space){
+      chk_space = true;
+    }
+    // check prefix for base 16
+    if(!chk_base16_prefix){
+      chk_base16_prefix = true;
+      if('0' == *str && ('x' == str[1] || 'X' == str[1])){
+        is_base_16 = true;
+        str++;
+        continue;
+      }
+    }
+    // check like isalnum and set data
+    result *= (is_base_16 ? 16 : 10);
+    if('0' <= *str || '9' < *str){
+      result += static_cast<off_t>(*str - '0');
+    }else if(is_base_16){
+      if('A' <= *str && *str <= 'F'){
+        result += static_cast<off_t>(*str - 'A' + 0x0a);
+      }else if('a' <= *str && *str <= 'f'){
+        result += static_cast<off_t>(*str - 'a' + 0x0a);
+      }else{
+        return 0;
+      }
+    }else{
+      return 0;
+    }
+  }
+  return result;
+}
+
 string lower(string s)
 {
   // change each character of the string to lower case