/** linux/lib/ctype.c*479* (C) 1991 Linus Torvalds*/#include <ctype.h>		// 字符類型頭文件。定義了一些有關字符類型判斷和轉換的宏。char _ctmp;			// 一個臨時字符變量，供ctype.h 文件中轉換字符宏函數使用。// 字符特性數組(表)，定義了各個字符對應的屬性，這些屬性類型(如_C 等)在ctype.h 中定義。// 用于判斷字符是控制字符(_C)、大寫字符(_U)、小寫字符(_L)等所屬類型。unsigned char _ctype[] = { 0x00,	/* EOF */  _C, _C, _C, _C, _C, _C, _C, _C,	/* 0-7 */  _C, _C | _S, _C | _S, _C | _S, _C | _S, _C | _S, _C, _C,	/* 8-15 */  _C, _C, _C, _C, _C, _C, _C, _C,	/* 16-23 */  _C, _C, _C, _C, _C, _C, _C, _C,	/* 24-31 */  _S | _SP, _P, _P, _P, _P, _P, _P, _P,	/* 32-39 */  _P, _P, _P, _P, _P, _P, _P, _P,	/* 40-47 */  _D, _D, _D, _D, _D, _D, _D, _D,	/* 48-55 */  _D, _D, _P, _P, _P, _P, _P, _P,	/* 56-63 */  _P, _U | _X, _U | _X, _U | _X, _U | _X, _U | _X, _U | _X, _U,	/* 64-71 */  _U, _U, _U, _U, _U, _U, _U, _U,	/* 72-79 */  _U, _U, _U, _U, _U, _U, _U, _U,	/* 80-87 */  _U, _U, _U, _P, _P, _P, _P, _P,	/* 88-95 */  _P, _L | _X, _L | _X, _L | _X, _L | _X, _L | _X, _L | _X, _L,	/* 96-103 */  _L, _L, _L, _L, _L, _L, _L, _L,	/* 104-111 */  _L, _L, _L, _L, _L, _L, _L, _L,	/* 112-119 */  _L, _L, _L, _P, _P, _P, _P, _C,	/* 120-127 */  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 128-143 */  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 144-159 */  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 160-175 */  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 176-191 */  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 192-207 */  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 208-223 */  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 224-239 */  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};				/* 240-255 */