| /* |
| * ***************************************************************************** |
| * |
| * Copyright 2018 Gavin D. Howard |
| * |
| * Permission to use, copy, modify, and/or distribute this software for any |
| * purpose with or without fee is hereby granted. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH |
| * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY |
| * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, |
| * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM |
| * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR |
| * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| * PERFORMANCE OF THIS SOFTWARE. |
| * |
| * ***************************************************************************** |
| * |
| * Definitions for bc's lexer. |
| * |
| */ |
| |
| #ifndef BC_LEX_H |
| #define BC_LEX_H |
| |
| #include <stdbool.h> |
| #include <stdlib.h> |
| |
| #include <bc.h> |
| |
| #define BC_LEX_GEN_ENUM(ENUM) ENUM, |
| #define BC_LEX_GEN_STR(STRING) #STRING, |
| |
| // BC_LEX_OP_NEGATE is not used in lexing; |
| // it is only for parsing. |
| #define BC_LEX_TOKEN_FOREACH(TOKEN) \ |
| TOKEN(BC_LEX_OP_INC) \ |
| TOKEN(BC_LEX_OP_DEC) \ |
| \ |
| TOKEN(BC_LEX_OP_POWER) \ |
| \ |
| TOKEN(BC_LEX_OP_MULTIPLY) \ |
| TOKEN(BC_LEX_OP_DIVIDE) \ |
| TOKEN(BC_LEX_OP_MODULUS) \ |
| \ |
| TOKEN(BC_LEX_OP_PLUS) \ |
| TOKEN(BC_LEX_OP_MINUS) \ |
| \ |
| TOKEN(BC_LEX_OP_REL_EQUAL) \ |
| TOKEN(BC_LEX_OP_REL_LESS_EQ) \ |
| TOKEN(BC_LEX_OP_REL_GREATER_EQ) \ |
| TOKEN(BC_LEX_OP_REL_NOT_EQ) \ |
| TOKEN(BC_LEX_OP_REL_LESS) \ |
| TOKEN(BC_LEX_OP_REL_GREATER) \ |
| \ |
| TOKEN(BC_LEX_OP_BOOL_NOT) \ |
| \ |
| TOKEN(BC_LEX_OP_BOOL_OR) \ |
| TOKEN(BC_LEX_OP_BOOL_AND) \ |
| \ |
| TOKEN(BC_LEX_OP_NEGATE) \ |
| \ |
| TOKEN(BC_LEX_OP_ASSIGN_POWER) \ |
| TOKEN(BC_LEX_OP_ASSIGN_MULTIPLY) \ |
| TOKEN(BC_LEX_OP_ASSIGN_DIVIDE) \ |
| TOKEN(BC_LEX_OP_ASSIGN_MODULUS) \ |
| TOKEN(BC_LEX_OP_ASSIGN_PLUS) \ |
| TOKEN(BC_LEX_OP_ASSIGN_MINUS) \ |
| TOKEN(BC_LEX_OP_ASSIGN) \ |
| \ |
| TOKEN(BC_LEX_NEWLINE) \ |
| \ |
| TOKEN(BC_LEX_WHITESPACE) \ |
| \ |
| TOKEN(BC_LEX_LEFT_PAREN) \ |
| TOKEN(BC_LEX_RIGHT_PAREN) \ |
| \ |
| TOKEN(BC_LEX_LEFT_BRACKET) \ |
| TOKEN(BC_LEX_RIGHT_BRACKET) \ |
| \ |
| TOKEN(BC_LEX_LEFT_BRACE) \ |
| TOKEN(BC_LEX_RIGHT_BRACE) \ |
| \ |
| TOKEN(BC_LEX_COMMA) \ |
| TOKEN(BC_LEX_SEMICOLON) \ |
| \ |
| TOKEN(BC_LEX_STRING) \ |
| TOKEN(BC_LEX_NAME) \ |
| TOKEN(BC_LEX_NUMBER) \ |
| \ |
| TOKEN(BC_LEX_KEY_AUTO) \ |
| TOKEN(BC_LEX_KEY_BREAK) \ |
| TOKEN(BC_LEX_KEY_CONTINUE) \ |
| TOKEN(BC_LEX_KEY_DEFINE) \ |
| TOKEN(BC_LEX_KEY_ELSE) \ |
| TOKEN(BC_LEX_KEY_FOR) \ |
| TOKEN(BC_LEX_KEY_HALT) \ |
| TOKEN(BC_LEX_KEY_IBASE) \ |
| TOKEN(BC_LEX_KEY_IF) \ |
| TOKEN(BC_LEX_KEY_LAST) \ |
| TOKEN(BC_LEX_KEY_LENGTH) \ |
| TOKEN(BC_LEX_KEY_LIMITS) \ |
| TOKEN(BC_LEX_KEY_OBASE) \ |
| TOKEN(BC_LEX_KEY_PRINT) \ |
| TOKEN(BC_LEX_KEY_QUIT) \ |
| TOKEN(BC_LEX_KEY_READ) \ |
| TOKEN(BC_LEX_KEY_RETURN) \ |
| TOKEN(BC_LEX_KEY_SCALE) \ |
| TOKEN(BC_LEX_KEY_SQRT) \ |
| TOKEN(BC_LEX_KEY_WHILE) \ |
| \ |
| TOKEN(BC_LEX_EOF) \ |
| \ |
| TOKEN(BC_LEX_INVALID) \ |
| |
| typedef enum BcLexTokenType { |
| BC_LEX_TOKEN_FOREACH(BC_LEX_GEN_ENUM) |
| } BcLexTokenType; |
| |
| typedef struct BcLexToken { |
| |
| BcLexTokenType type; |
| char* string; |
| |
| } BcLexToken; |
| |
| typedef struct BcLex { |
| |
| const char* buffer; |
| size_t idx; |
| uint32_t line; |
| bool newline; |
| const char* file; |
| size_t len; |
| |
| } BcLex; |
| |
| BcStatus bc_lex_init(BcLex* lex, const char* file); |
| |
| BcStatus bc_lex_text(BcLex* lex, const char* text); |
| |
| BcStatus bc_lex_next(BcLex* lex, BcLexToken* token); |
| |
| BcStatus bc_lex_printToken(BcLexToken* token); |
| |
| #endif // BC_LEX_H |