ascii

  1 /* This program gives information about an ascii code.   2 ** Its arguments are taken as octal, hex, or decimal numbers   3 ** and it prints information about the character.   4 ** With an argument of -, all values are printed.   5 ** With no argument, ascii expects characters from the keyboard.   6 ** To exit, push the same key three times in a row.   7 */   8   9 #include <stdlib.h>  10 #include <stdio.h>  11 #include <termios.h>  12 #include <unistd.h>  13 #include <ctype.h>  14  15 char *value[] = {  16 "nul ^@", "soh ^A", "stx ^B", "etx ^C", "eot ^D", "enq ^E", "ack ^F", "bel ^G",  17 "bs ^H", "ht ^I", "nl ^J", "vt ^K", "np ^L", "cr ^M", "so ^N", "si ^O",  18 "dle ^P", "dc1 ^Q", "dc2 ^R", "dc3 ^S", "dc4 ^T", "nak ^U", "syn ^V", "etb ^W",  19 "can ^X", "em ^Y", "sub ^Z", "esc ^[",  20 "fs ^\\ ^shL", "gs ^] ^shM",  21 "rs ^^ ^shN", "us ^_ ^shO",  22 "sp", "!", "\"", "#", "$", "%", "&", "'",  23 "(", ")", "*", "+", ",", "-", ".", "/",  24 "0", "1", "2", "3", "4", "5", "6", "7",  25 "8", "9", ":", ";", "<", "=", ">", "?",  26 "@", "A", "B", "C", "D", "E", "F", "G",  27 "H", "I", "J", "K", "L", "M", "N", "O",  28 "P", "Q", "R", "S", "T", "U", "V", "W",  29 "X", "Y", "Z", "[", "\\", "]", "^", "_",  30 "`", "a", "b", "c", "d", "e", "f", "g",  31 "h", "i", "j", "k", "l", "m", "n", "o",  32 "p", "q", "r", "s", "t", "u", "v", "w",  33 "x", "y", "z", "{", "|", "}", "~", "del ^?"  34 };  35  36 static void show_char(int c) {  37 printf(" %#4x %#4o %3d %s\n", c, c, c, value[c]);  38 }  39  40 int main(int argc, char **argv) {  41 struct termios orig, new;  42 int base, current, last, lastlast;  43 current = last = lastlast = -1;  44 if (argc > 1) {  45 if (*argv[1] == '-') {  46 for (current = 0; current <= 127; current++)  47 show_char(current);  48 } else {  49 for (int i = 1; i < argc; i++) {  50 char *cp = argv[i];  51 current = 0;  52 switch (*cp) {  53 case '0':  54 base = 8;  55 cp++;  56 if (*cp != 'x')  57 break;  58 /* else fall through */  59 case 'x':  60 base = 16;  61 cp++;  62 break;  63 default:  64 base = 10;  65 }  66 for (;; ++cp) {  67 int d;  68 if (!isxdigit (*cp))  69 break;  70 if (isdigit (*cp))  71 d = *cp - '0';  72 else if (isupper (*cp))  73 d = *cp - 'A' + 10;  74 else  75 d = *cp - 'a' + 10;  76 if (d > base)  77 break;  78 current = base * current + d;  79 }  80 if (*cp != '\0') {  81 printf("%s???\n", cp);  82 exit(1);  83 }  84 if (current <= 127) {  85 show_char(current);  86 }  87 else printf("value %s out of range\n", argv[i]);  88 }  89 }  90 } else {  91 (void) tcgetattr(2, &orig);  92 new = orig;  93 (void) cfmakeraw(&new);  94  95 (void) tcsetattr(2, TCSANOW, &new);  96 while (((current = (0177 & getchar())) != last) || (current != lastlast)) {  97 lastlast = last;  98 last = current;  99 show_char(current); 100 putchar('\r'); // device is raw 101 } 102 (void) tcsetattr(2, TCSANOW, &orig); 103 } 104 }

0000000000401196 <show_char>: 401196 48 83 ec 08 sub $0x8,%rsp 40119a 89 fe mov %edi,%esi 40119c 48 63 c7 movslq%edi,%rax 40119f 4c 8b 04 c5 80 40 40 mov 0x404080(,%rax,8),%r8 4011a6 00 4011a7 89 f9 mov %edi,%ecx 4011a9 89 fa mov %edi,%edx 4011ab bf 10 20 40 00 mov $0x402010,%edi 4011b0 b8 00 00 00 00 mov $0x0,%eax 4011b5 e8 76 fe ff ff call 401030 <printf@plt> 4011ba 48 83 c4 08 add $0x8,%rsp 4011be c3 ret 00000000004011bf <main>: 4011bf 41 55 push %r13 4011c1 41 54 push %r12 4011c3 55 push %rbp 4011c4 53 push %rbx 4011c5 48 81 ec 88 00 00 00 sub $0x88,%rsp 4011cc 83 ff 01 cmp $0x1,%edi 4011cf 0f 8e 1a 01 00 00 jle 4012ef <main+0x130> 4011d5 41 89 fd mov %edi,%r13d 4011d8 49 89 f4 mov %rsi,%r12 4011db 48 8b 46 08 mov 0x8(%rsi),%rax 4011df 80 38 2d cmpb $0x2d,(%rax) 4011e2 74 21 je 401205 <main+0x46> 4011e4 e8 b7 fe ff ff call 4010a0 <__ctype_b_loc@plt> 4011e9 48 89 c5 mov %rax,%rbp 4011ec 49 8d 5c 24 08 lea 0x8(%r12),%rbx 4011f1 41 8d 45 fe lea -0x2(%r13),%eax 4011f5 4d 8d 64 c4 10 lea 0x10(%r12,%rax,8),%r12 4011fa 41 bd 10 00 00 00 mov $0x10,%r13d 401200 e9 97 00 00 00 jmp 40129c <main+0xdd> 401205 bb 00 00 00 00 mov $0x0,%ebx 40120a 89 df mov %ebx,%edi 40120c e8 85 ff ff ff call 401196 <show_char> 401211 83 c3 01 add $0x1,%ebx 401214 81 fb 80 00 00 00 cmp $0x80,%ebx 40121a 75 ee jne 40120a <main+0x4b> 40121c e9 5f 01 00 00 jmp 401380 <main+0x1c1> 401221 49 8d 71 01 lea 0x1(%r9),%rsi 401225 b9 08 00 00 00 mov $0x8,%ecx 40122a 41 80 79 01 78 cmpb $0x78,0x1(%r9) 40122f 0f 85 82 00 00 00 jne 4012b7 <main+0xf8> 401235 eb 03 jmp 40123a <main+0x7b> 401237 4c 89 ce mov %r9,%rsi 40123a 48 83 c6 01 add $0x1,%rsi 40123e 44 89 e9 mov %r13d,%ecx 401241 eb 74 jmp 4012b7 <main+0xf8> 401243 f6 c4 01 test $0x1,%ah 401246 74 31 je 401279 <main+0xba> 401248 0f be c2 movsbl%dl,%eax 40124b 83 e8 37 sub $0x37,%eax 40124e 39 c8 cmp %ecx,%eax 401250 7f 2f jg 401281 <main+0xc2> 401252 0f af f9 imul %ecx,%edi 401255 01 c7 add %eax,%edi 401257 48 83 c6 01 add $0x1,%rsi 40125b 0f b6 16 movzbl(%rsi),%edx 40125e 48 0f be c2 movsbq%dl,%rax 401262 41 0f b7 04 40 movzwl(%r8,%rax,2),%eax 401267 f6 c4 10 test $0x10,%ah 40126a 74 15 je 401281 <main+0xc2> 40126c f6 c4 08 test $0x8,%ah 40126f 74 d2 je 401243 <main+0x84> 401271 0f be c2 movsbl%dl,%eax 401274 83 e8 30 sub $0x30,%eax 401277 eb d5 jmp 40124e <main+0x8f> 401279 0f be c2 movsbl%dl,%eax 40127c 83 e8 57 sub $0x57,%eax 40127f eb cd jmp 40124e <main+0x8f> 401281 84 d2 test %dl,%dl 401283 75 3d jne 4012c2 <main+0x103> 401285 83 ff 7f cmp $0x7f,%edi 401288 7f 51 jg 4012db <main+0x11c> 40128a e8 07 ff ff ff call 401196 <show_char> 40128f 48 83 c3 08 add $0x8,%rbx 401293 4c 39 e3 cmp %r12,%rbx 401296 0f 84 e4 00 00 00 je 401380 <main+0x1c1> 40129c 4c 8b 0b mov (%rbx),%r9 40129f 41 0f b6 01 movzbl(%r9),%eax 4012a3 3c 30 cmp $0x30,%al 4012a5 0f 84 76 ff ff ff je 401221 <main+0x62> 4012ab 3c 78 cmp $0x78,%al 4012ad 74 88 je 401237 <main+0x78> 4012af 4c 89 ce mov %r9,%rsi 4012b2 b9 0a 00 00 00 mov $0xa,%ecx 4012b7 4c 8b 45 00 mov 0x0(%rbp),%r8 4012bb bf 00 00 00 00 mov $0x0,%edi 4012c0 eb 99 jmp 40125b <main+0x9c> 4012c2 bf 28 20 40 00 mov $0x402028,%edi 4012c7 b8 00 00 00 00 mov $0x0,%eax 4012cc e8 5f fd ff ff call 401030 <printf@plt> 4012d1 bf 01 00 00 00 mov $0x1,%edi 4012d6 e8 a5 fd ff ff call 401080 <exit@plt> 4012db 4c 89 ce mov %r9,%rsi 4012de bf 2f 20 40 00 mov $0x40202f,%edi 4012e3 b8 00 00 00 00 mov $0x0,%eax 4012e8 e8 43 fd ff ff call 401030 <printf@plt> 4012ed eb a0 jmp 40128f <main+0xd0> 4012ef 48 8d 5c 24 40 lea 0x40(%rsp),%rbx 4012f4 48 89 de mov %rbx,%rsi 4012f7 bf 02 00 00 00 mov $0x2,%edi 4012fc e8 5f fd ff ff call 401060 <tcgetattr@plt> 401301 48 89 e7 mov %rsp,%rdi 401304 b9 0f 00 00 00 mov $0xf,%ecx 401309 48 89 de mov %rbx,%rsi 40130c f3 a5 rep movsl%ds:(%rsi),%es:(%rdi) 40130e 48 89 e7 mov %rsp,%rdi 401311 e8 3a fd ff ff call 401050 <cfmakeraw@plt> 401316 48 89 e2 mov %rsp,%rdx 401319 be 00 00 00 00 mov $0x0,%esi 40131e bf 02 00 00 00 mov $0x2,%edi 401323 e8 48 fd ff ff call 401070 <tcsetattr@plt> 401328 41 bc ff ff ff ff mov $0xffffffff,%r12d 40132e bd ff ff ff ff mov $0xffffffff,%ebp 401333 eb 1d jmp 401352 <main+0x193> 401335 89 df mov %ebx,%edi 401337 e8 5a fe ff ff call 401196 <show_char> 40133c 48 8b 35 3d 31 00 00 mov 0x313d(%rip),%rsi # 404480 <stdout@@GLIBC_2.2.5> 401343 bf 0d 00 00 00 mov $0xd,%edi 401348 e8 f3 fc ff ff call 401040 <putc@plt> 40134d 41 89 ec mov %ebp,%r12d 401350 89 dd mov %ebx,%ebp 401352 48 8b 3d 37 31 00 00 mov 0x3137(%rip),%rdi # 404490 <stdin@@GLIBC_2.2.5> 401359 e8 32 fd ff ff call 401090 <getc@plt> 40135e 83 e0 7f and $0x7f,%eax 401361 89 c3 mov %eax,%ebx 401363 41 39 c4 cmp %eax,%r12d 401366 75 cd jne 401335 <main+0x176> 401368 39 c5 cmp %eax,%ebp 40136a 75 c9 jne 401335 <main+0x176> 40136c 48 8d 54 24 40 lea 0x40(%rsp),%rdx 401371 be 00 00 00 00 mov $0x0,%esi 401376 bf 02 00 00 00 mov $0x2,%edi 40137b e8 f0 fc ff ff call 401070 <tcsetattr@plt> 401380 b8 00 00 00 00 mov $0x0,%eax 401385 48 81 c4 88 00 00 00 add $0x88,%rsp 40138c 5b pop %rbx 40138d 5d pop %rbp 40138e 41 5c pop %r12 401390 41 5d pop %r13 401392 c3 ret