106 lines
2.6 KiB
C
106 lines
2.6 KiB
C
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#if !defined(LUMENARIUM_SHARED_FILE_TRACKER_H)
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#define LUMENARIUM_SHARED_FILE_TRACKER_H
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#if !defined(OS_FILE_HANDLE_TYPE)
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# error "You must define an OS_FILE_HANDLE_TYPE"
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#endif
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#if !defined(OS_FILE_MAX_PATH)
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# error "You must define an OS_FILE_MAX_PATH"
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#endif
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#if !defined(OS_FILE_INVALID_HANDLE)
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# error "You must define an OS_FILE_INVALID_HANDLE"
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#endif
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#define open_files_cap 32
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global u64 open_files_len = 1; // zero is invalid
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global char open_file_paths[open_files_cap][OS_FILE_MAX_PATH];
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global u64 open_file_paths_len[open_files_cap];
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global OS_FILE_HANDLE_TYPE open_files[open_files_cap];
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void open_files_init();
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bool open_files_has_room();
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OS_FILE_HANDLE_TYPE open_files_get_handle(File_Handle handle);
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String open_files_get_path(File_Handle handle);
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File_Handle open_files_put_handle(OS_FILE_HANDLE_TYPE os_handle, String path);
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void open_files_rem_file(File_Handle handle);
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////////////////////////////////////////////////
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// IMPLEMENTATION
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void
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open_files_init()
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{
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for (u32 i = 0; i < open_files_cap; i++)
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{
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open_files[i] = OS_FILE_INVALID_HANDLE;
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}
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}
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bool open_files_has_room() { return open_files_len < open_files_cap; }
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OS_FILE_HANDLE_TYPE
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open_files_get_handle(File_Handle handle)
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{
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assert(handle.value < open_files_len);
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return open_files[handle.value];
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}
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String
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open_files_get_path(File_Handle handle)
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{
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assert(handle.value < open_files_len);
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String result = {
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.str = (u8*)open_file_paths[handle.value],
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.len = open_file_paths_len[handle.value],
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.cap = open_file_paths_len[handle.value],
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};
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return result;
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}
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File_Handle
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open_files_put_handle(OS_FILE_HANDLE_TYPE os_handle, String path)
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{
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assert(path.len < OS_FILE_MAX_PATH);
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File_Handle result = {};
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if (os_handle != OS_FILE_INVALID_HANDLE)
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{
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if (open_files_has_room())
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{
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result.value = open_files_len++;
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}
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else
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{
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// search for emtpy index
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for (u32 i = 1; i < open_files_cap; i++)
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{
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if (open_files[i] == OS_FILE_INVALID_HANDLE)
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{
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result.value = i;
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}
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}
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}
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if (result.value != 0)
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{
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open_files[result.value] = os_handle;
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memory_copy(path.str, (u8*)open_file_paths[result.value], path.len);
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open_file_paths[result.value][path.len] = 0; // null term
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open_file_paths_len[result.value] = path.len;
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}
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}
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return result;
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}
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void
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open_files_rem_file(File_Handle handle)
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{
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assert(handle.value < open_files_len);
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open_files[handle.value] = OS_FILE_INVALID_HANDLE;;
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}
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#endif // LUMENARIUM_SHARED_FILE_TRACKER_H
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