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Annotation of OpenXM_contrib/gmp/demos/calc/calclex.l, Revision 1.1

1.1     ! ohara       1: /* Lexical analyzer for calc program.
        !             2:
        !             3: Copyright 2000, 2001 Free Software Foundation, Inc.
        !             4:
        !             5: This file is part of the GNU MP Library.
        !             6:
        !             7: This program is free software; you can redistribute it and/or modify it under
        !             8: the terms of the GNU General Public License as published by the Free Software
        !             9: Foundation; either version 2 of the License, or (at your option) any later
        !            10: version.
        !            11:
        !            12: This program is distributed in the hope that it will be useful, but WITHOUT ANY
        !            13: WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
        !            14: PARTICULAR PURPOSE.  See the GNU General Public License for more details.
        !            15:
        !            16: You should have received a copy of the GNU General Public License along with
        !            17: this program; if not, write to the Free Software Foundation, Inc., 59 Temple
        !            18: Place - Suite 330, Boston, MA 02111-1307, USA. */
        !            19:
        !            20: %{
        !            21: #include "calc-common.h"
        !            22:
        !            23:
        !            24: #if WITH_READLINE
        !            25: /* Let GNU flex use readline.  See the calcread.c redefined input() for a
        !            26:    way that might work for a standard lex too.  */
        !            27: #define YY_INPUT(buf,result,max_size)   \
        !            28:   result = calc_input (buf, max_size);
        !            29: #endif
        !            30:
        !            31:
        !            32: /* Non-zero when reading the second or subsequent line of an expression,
        !            33:    used to give a different prompt when using readline.  */
        !            34: int  calc_more_input = 0;
        !            35:
        !            36:
        !            37: const struct calc_keywords_t  calc_keywords[] = {
        !            38:   { "abs",       ABS },
        !            39:   { "bin",       BIN },
        !            40:   { "decimal",   DECIMAL },
        !            41:   { "fib",       FIB },
        !            42:   { "hex",       HEX },
        !            43:   { "help",      HELP },
        !            44:   { "gcd",       GCD },
        !            45:   { "kron",      KRON },
        !            46:   { "lcm",       LCM },
        !            47:   { "lucnum",    LUCNUM },
        !            48:   { "nextprime", NEXTPRIME },
        !            49:   { "powm",      POWM },
        !            50:   { "quit",      QUIT },
        !            51:   { "root",      ROOT },
        !            52:   { "sqrt",      SQRT },
        !            53:   { NULL }
        !            54: };
        !            55: %}
        !            56:
        !            57: %%
        !            58:
        !            59: [ \t\f] { /* white space is skipped */ }
        !            60:
        !            61: [;\n]   { /* semicolon or newline separates statements */
        !            62:           calc_more_input = 0;
        !            63:           return EOS; }
        !            64: \\\n    { /* escaped newlines are skipped */ }
        !            65:
        !            66:
        !            67: #(([^\\\n]*)\\)+\n {
        !            68:             /* comment through to escaped newline is skipped */ }
        !            69: #[^\n]*\n { /* comment through to newline is a separator */
        !            70:             calc_more_input = 0;
        !            71:             return EOS; }
        !            72: #[^\n]* {   /* comment through to EOF skipped */ }
        !            73:
        !            74:
        !            75: [-+*/%()<>^!=,] { return yytext[0]; }
        !            76: "<="    { return LE; }
        !            77: ">="    { return GE; }
        !            78: "=="    { return EQ; }
        !            79: "!="    { return NE; }
        !            80: "<<"    { return LSHIFT; }
        !            81: ">>"    { return RSHIFT; }
        !            82: "&&"    { return LAND; }
        !            83: "||"    { return LOR; }
        !            84:
        !            85: (0[xX])?[0-9A-F]+ {
        !            86:         yylval.str = yytext;
        !            87:         return NUMBER; }
        !            88:
        !            89: [a-zA-Z][a-zA-Z0-9]* {
        !            90:         int  i;
        !            91:
        !            92:         for (i = 0; calc_keywords[i].name != NULL; i++)
        !            93:           if (strcmp (yytext, calc_keywords[i].name) == 0)
        !            94:             return calc_keywords[i].value;
        !            95:
        !            96:         if (yytext[0] >= 'a' && yytext[0] <= 'z' && yytext[1] == '\0')
        !            97:           {
        !            98:             yylval.var = yytext[0] - 'a';
        !            99:             return VARIABLE;
        !           100:           }
        !           101:
        !           102:         return BAD;
        !           103: }
        !           104:
        !           105: . { return BAD; }
        !           106:
        !           107: %%
        !           108:
        !           109: int
        !           110: yywrap ()
        !           111: {
        !           112:   return 1;
        !           113: }