黑莓COD文件

COD是黑莓專有的文件格式。用來存儲編譯好的Java代碼，大致相當於一個JAR文件。

 

文件結構

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/* +------------------------------------------+ | COD file header (1) | +------------------------------------------+ | Code segment header | | size = sizeof(code_header_t) = 0x2C | +------------------------------------------+ | Code segment | | size = code_header_t.code_size | +------------------------------------------+ | Data segment header | | size = sizeof(data_header_t) = 0x34 | +------------------------------------------+ | Data segment | | size = code_header_t.data_size | +------------------------------------------+ +------------------------------------------+ | COD file header (2) | +------------------------------------------+ | Code segment header | . . . . . . +------------------------------------------+ */

 

typedef struct { } codfile_header_t; typedef struct { int flashid; uint section_number; //always 0 uint vtable_pointer; //always 0 time_t timestamp; uint user_version; uint fieldref_pointer; ushort maxtype_list_size; short reserved; //always 0xFF int data_section; //always 0xFFFF int module_info; //always 0xFFFF ushort version; ushort code_size; ushort data_size; ushort flags; } code_header_t; sizeof(code_header_t) = 0x2C; typedef struct { ubyte flags; ubyte version; ushort num_icalls; ubyte num_modules; ubyte num_classes ; ushort exported_string_offset; ushort data_bytes_offset; ushort empty_field; ushort class_definitions; ushort array_of_unknow_fields[14]; ushort aliases; ushort array_of_unknow_fields[22]; } data_header_t; sizeof(data_header_t) = 0x34;

 

 

JAR轉COD

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SET PP=D:/Program Files/Research In Motion/BlackBerry JDE 4.5.0
"%PP%/bin/rapc" import="%PP%/lib/net_rim_api.jar" codename=Hello -midlet ../src/Hello.jar
PAUSE

 需要文件 rapc.exe 和 net_rim_api.jar

 

 

 

參考

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1)http://www.google.cn/codesearch/p?hl=zh-CN#X9eizuvxJ8E/doc/cod-format&q=maxtype_list_size&sa=N&cd=2&ct=rc&l=21

2)http://www.google.cn/codesearch/p?hl=zh-CN#aZ3G3dCE_3M/src/cod-internal.h&q=maxtype_list_size&sa=N&cd=1&ct=rc&l=135