| 1 | SIGN [+-] |
| 2 | DIGIT [0-9] |
| 3 | ALPHA [a-zA-Z_] |
| 4 | ALPHADIGIT [a-zA-Z_0-9] |
| 5 | STRINGCHAR [^"\\] |
| 6 | WORDCHAR [^'\\] |
| 7 | |
| 8 | %{ |
| 9 | /* |
| 10 | * File: lexer.l |
| 11 | * Description: Lexical analyser for PROLOGIO; can be used with |
| 12 | * either lex and flex. |
| 13 | */ |
| 14 | #include <string.h> |
| 15 | #include <unistd.h> |
| 16 | |
| 17 | /* +++steve162e: added, otherwise, PROIO_input will be undefined (at least under LINUX) |
| 18 | please check, if this is also TRUE under other UNIXes. |
| 19 | */ |
| 20 | |
| 21 | #if defined(FLEX_SCANNER) && defined(_LINUX) |
| 22 | #define PROIO_input my_input |
| 23 | #endif |
| 24 | /* ---steve162e */ |
| 25 | |
| 26 | #include "wx/deprecated/expr.h" |
| 27 | |
| 28 | #define Return(x) return x; |
| 29 | |
| 30 | #if defined(VMS) && !defined(strdup) |
| 31 | #define strdup(s) (strcpy((char *)malloc(strlen(s)+1), s)); |
| 32 | #endif |
| 33 | |
| 34 | static size_t lex_buffer_length = 0; |
| 35 | static const char *lex_buffer = NULL; |
| 36 | static size_t lex_string_ptr = 0; |
| 37 | static int lex_read_from_string = 0; |
| 38 | |
| 39 | static int my_input(void); |
| 40 | |
| 41 | #ifdef FLEX_SCANNER |
| 42 | # undef YY_INPUT |
| 43 | # define YY_INPUT(buf,result,max_size) \ |
| 44 | if (lex_read_from_string) \ |
| 45 | { int c = my_input(); result = (c == 0) ? YY_NULL : ((buf)[0]=(c), 1); } \ |
| 46 | else \ |
| 47 | if ( (result = read( fileno(yyin), (char *) buf, max_size )) < 0 ) \ |
| 48 | YY_FATAL_ERROR( "read() in flex scanner failed" ); |
| 49 | #else |
| 50 | # undef unput |
| 51 | # define unput(_c) my_unput(_c) |
| 52 | static int my_unput(char); |
| 53 | #endif |
| 54 | |
| 55 | %} |
| 56 | |
| 57 | %% |
| 58 | |
| 59 | {SIGN}?{DIGIT}+ {yylval.s = strdup(yytext); Return(INTEGER);} |
| 60 | |
| 61 | "e" Return(EXP); |
| 62 | |
| 63 | {ALPHA}{ALPHADIGIT}* {yylval.s = strdup(yytext); Return(WORD);} |
| 64 | |
| 65 | "'"{WORDCHAR}*"'" {int len = strlen(yytext); |
| 66 | yytext[len-1] = 0; |
| 67 | yylval.s = strdup(yytext+1); |
| 68 | Return(WORD);} |
| 69 | |
| 70 | \"({STRINGCHAR}|\\\"|\|\\\\|\\)*\" {yylval.s = strdup(yytext); Return(STRING);} |
| 71 | |
| 72 | "(" Return(OPEN); |
| 73 | |
| 74 | ")" Return(CLOSE); |
| 75 | |
| 76 | "," Return(COMMA); |
| 77 | |
| 78 | "[" Return(OPEN_SQUARE); |
| 79 | |
| 80 | "]" Return(CLOSE_SQUARE); |
| 81 | |
| 82 | "=" Return(EQUALS); |
| 83 | |
| 84 | "." Return(PERIOD); |
| 85 | |
| 86 | [ \t] ; |
| 87 | |
| 88 | \n ; |
| 89 | |
| 90 | "/*" { loop: |
| 91 | #ifdef __cplusplus |
| 92 | while (yyinput() != '*'); |
| 93 | switch (yyinput()) |
| 94 | #else |
| 95 | while (input() != '*'); |
| 96 | switch (input()) |
| 97 | #endif |
| 98 | { |
| 99 | case '/': break; |
| 100 | case '*': unput('*'); |
| 101 | default: goto loop; |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | . Return(ERROR); |
| 106 | |
| 107 | %% |
| 108 | |
| 109 | |
| 110 | #ifdef FLEX_SCANNER |
| 111 | static int lex_input() { |
| 112 | return input(); |
| 113 | } |
| 114 | #else /* BSD/AT&T lex */ |
| 115 | #ifndef input |
| 116 | # error "Sorry, but need either flex or AT&T lex" |
| 117 | #endif |
| 118 | static int lex_input() { |
| 119 | return input(); |
| 120 | } |
| 121 | |
| 122 | # undef input |
| 123 | # define input() my_input() |
| 124 | static int my_unput(char c) |
| 125 | { |
| 126 | if (lex_read_from_string != 0) { |
| 127 | /* Make sure we have something */ |
| 128 | if (lex_string_ptr) { |
| 129 | if (c == '\n') yylineno--; |
| 130 | lex_string_ptr--; |
| 131 | } |
| 132 | } else { |
| 133 | yytchar= (c);if(yytchar=='\n')yylineno--;*yysptr++=yytchar; |
| 134 | /* unput(c); Causes infinite recursion! */ |
| 135 | } |
| 136 | return c; |
| 137 | } |
| 138 | |
| 139 | #endif |
| 140 | |
| 141 | /* Public */ |
| 142 | void LexFromFile(FILE *fd) |
| 143 | { |
| 144 | lex_read_from_string = 0; |
| 145 | yyin = fd; |
| 146 | /* Don't know why this is necessary, but otherwise |
| 147 | * lex only works _once_! |
| 148 | */ |
| 149 | #ifdef FLEX_SCANNER |
| 150 | yyrestart(fd); |
| 151 | yy_init = 1; |
| 152 | #endif |
| 153 | } |
| 154 | |
| 155 | void LexFromString(char *buffer) |
| 156 | { |
| 157 | lex_read_from_string = 1; |
| 158 | lex_buffer = buffer; |
| 159 | lex_buffer_length = strlen(buffer); |
| 160 | lex_string_ptr = 0; |
| 161 | /* Don't know why this is necessary, but otherwise |
| 162 | * lex only works _once_! |
| 163 | */ |
| 164 | #ifdef FLEX_SCANNER |
| 165 | yy_init = 1; |
| 166 | #endif |
| 167 | } |
| 168 | |
| 169 | static int my_input( void ) |
| 170 | { |
| 171 | if (lex_read_from_string) { |
| 172 | if (lex_string_ptr == lex_buffer_length) |
| 173 | return 0; |
| 174 | else { |
| 175 | char c = lex_buffer[lex_string_ptr++]; |
| 176 | #ifndef FLEX_SCANNER |
| 177 | if (c == '\n') yylineno++; |
| 178 | #endif |
| 179 | return c; |
| 180 | } |
| 181 | } else { |
| 182 | return lex_input(); |
| 183 | } |
| 184 | } |
| 185 | |
| 186 | void wxExprCleanUp() |
| 187 | { |
| 188 | #ifdef FLEX_SCANNER |
| 189 | if (yy_current_buffer) |
| 190 | yy_delete_buffer(yy_current_buffer); |
| 191 | #endif |
| 192 | } |