1 %{ 2 /* lang.l 1.7 81/04/02 */ 3 4 #include <ctype.h> 5 #include "y.tab.h" 6 #include "config.h" 7 8 #define tprintf if (do_trace) printf 9 10 int yylval; 11 12 /* 13 * Key word table 14 */ 15 16 struct kt { 17 char *kt_name; 18 int kt_val; 19 } key_words[] = { 20 "cpu", CPU, "ident", IDENT, "config", CONFIG, "options", OPTIONS, 21 "device", DEVICE, "controller", CONTROLLER, "uba", UBA, "mba", MBA, 22 "csr", CSR, "nexus", NEXUS, "drive", DRIVE, "vector", VECTOR, 23 "pseudo-device", PSEUDO_DEVICE, "flags", FLAGS, "trace", TRACE, 24 "disk", DISK, "tape", DEVICE, "slave", SLAVE, "at", AT, 25 "hz", HZ, "timezone", TIMEZONE, "dst", DST, "maxusers", MAXUSERS, 26 "master", MASTER, 27 0,0, 28 }; 29 %} 30 WORD [A-Za-z_][-A-Za-z_]* 31 %% 32 {WORD} { 33 int i; 34 35 if ((i = kw_lookup(yytext)) == -1) 36 { 37 yylval = (int) yytext; 38 tprintf("id(%s) ", yytext); 39 return ID; 40 } 41 tprintf("(%s) ", yytext); 42 return i; 43 } 44 \"[^"]+\" { 45 yytext[strlen(yytext)-1] = '\0'; 46 yylval = (int) yytext + 1; 47 return ID; 48 } 49 0[0-7]* { 50 yylval = octal(yytext); 51 tprintf("#O:%o ", yylval); 52 return NUMBER; 53 } 54 0x[0-9a-f]+ { 55 yylval = hex(yytext); 56 tprintf("#X:%x ", yylval); 57 return NUMBER; 58 } 59 [1-9][0-9]* { 60 yylval = atoi(yytext); 61 tprintf("#D:%d ", yylval); 62 return NUMBER; 63 } 64 [0-9]"."[0-9]* { 65 float atof(); 66 yylval = (int) (60 * atof(yytext) + 0.5); 67 return FPNUMBER; 68 } 69 "?" { 70 yylval = -1; 71 tprintf("? "); 72 return NUMBER; 73 } 74 \n/[ \t] { 75 yyline++; 76 tprintf("\n... "); 77 } 78 \n { 79 yyline++; 80 tprintf("\n"); 81 return SEMICOLON; 82 } 83 ^#.* { /* Ignored (comment) */; } 84 [ \t]* { /* Ignored (white space) */; } 85 ";" { return SEMICOLON; } 86 "," { return COMMA; } 87 %% 88 /* 89 * kw_lookup 90 * Look up a string in the keyword table. Returns a -1 if the 91 * string is not a keyword otherwise it returns the keyword number 92 */ 93 94 kw_lookup(word) 95 register char *word; 96 { 97 register struct kt *kp; 98 99 for (kp = key_words; kp->kt_name != 0; kp++) 100 if (eq(word, kp->kt_name)) 101 return kp->kt_val; 102 return -1; 103 } 104 105 /* 106 * Number conversion routines 107 */ 108 109 octal(str) 110 char *str; 111 { 112 int num; 113 114 sscanf(str, "%o", &num); 115 return num; 116 } 117 118 hex(str) 119 char *str; 120 { 121 int num; 122 123 sscanf(str+2, "%x", &num); 124 return num; 125 } 126