zzy
8007825800
- 添加了完整的条件编译功能，包括 #if、#elif、#else、#endif 指令 - 实现了数值常量表达式的解析和求值 - 支持嵌套条件编译和与其他指令混合使用 - 实现了可变参数宏定义和 __VA_ARGS__ 替换功能 - 改进了宏展开机制以正确处理可变参数宏 - 重构了预处理器指令处理逻辑，提高了代码可维护性 - 添加了相应的单元测试用例验证新功能
220 lines
11 KiB
C
220 lines
11 KiB
C
#ifndef __SCC_LEXER_TOKEN_H__
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#define __SCC_LEXER_TOKEN_H__
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#include <scc_core.h>
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#include <scc_pos.h>
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#include <scc_core_ring.h>
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struct scc_lexer_token;
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typedef struct scc_lexer_token scc_lexer_tok_t;
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typedef SCC_RING(scc_lexer_tok_t) scc_lexer_tok_ring_t;
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typedef SCC_VEC(scc_lexer_tok_t) scc_lexer_tok_vec_t;
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typedef enum scc_cstd {
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SCC_CSTD_C89,
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SCC_CSTD_C99,
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SCC_CEXT_SCC,
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} scc_cstd_t;
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/* clang-format off */
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/// https://cppreference.cn/w/c/preprocessor
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#define SCC_PPKEYWORD_TABLE \
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X(define , SCC_CSTD_C99, SCC_PP_TOK_DEFINE ) \
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X(elif , SCC_CSTD_C99, SCC_PP_TOK_ELIF ) \
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X(elifdef , SCC_CSTD_C99, SCC_PP_TOK_ELIFDEF ) \
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X(elifndef , SCC_CSTD_C99, SCC_PP_TOK_ELIFNDEF ) \
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X(else , SCC_CSTD_C99, SCC_PP_TOK_ELSE ) \
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X(embed , SCC_CSTD_C99, SCC_PP_TOK_EMBED ) \
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X(endif , SCC_CSTD_C99, SCC_PP_TOK_ENDIF ) \
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X(error , SCC_CSTD_C99, SCC_PP_TOK_ERROR ) \
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X(if , SCC_CSTD_C99, SCC_PP_TOK_IF ) \
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X(ifdef , SCC_CEXT_SCC, SCC_PP_TOK_IFDEF ) \
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X(ifndef , SCC_CSTD_C99, SCC_PP_TOK_IFNDEF ) \
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X(include , SCC_CSTD_C99, SCC_PP_TOK_INCLUDE ) \
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X(line , SCC_CEXT_SCC, SCC_PP_TOK_LINE ) \
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X(pragma , SCC_CSTD_C99, SCC_PP_TOK_PRAGMA ) \
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X(undef , SCC_CEXT_SCC, SCC_PP_TOK_UNDEF ) \
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X(warning , SCC_CSTD_C99, SCC_PP_TOK_WARNING ) \
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// END
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/* clang-format on */
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/* clang-format off */
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// WARNING: Using Binary Search To Fast Find Keyword
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// 你必须确保其中是按照字典序排列
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#define SCC_CKEYWORD_TABLE \
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X(asm , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_ASM , SCC_CEXT_SCC) \
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X(atomic , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_ATOMIC , SCC_CEXT_SCC) \
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X(auto , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_AUTO , SCC_CEXT_SCC) \
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X(bool , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_BOOL , SCC_CEXT_SCC) \
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X(break , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_BREAK , SCC_CSTD_C89) \
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X(case , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_CASE , SCC_CSTD_C89) \
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X(char , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_CHAR , SCC_CSTD_C89) \
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X(complex , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_COMPLEX , SCC_CEXT_SCC) \
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X(const , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_CONST , SCC_CSTD_C89) \
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X(continue , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_CONTINUE , SCC_CSTD_C89) \
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X(default , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_DEFAULT , SCC_CSTD_C89) \
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X(do , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_DO , SCC_CSTD_C89) \
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X(double , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_DOUBLE , SCC_CSTD_C89) \
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X(else , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_ELSE , SCC_CSTD_C89) \
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X(enum , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_ENUM , SCC_CSTD_C89) \
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X(extern , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_EXTERN , SCC_CSTD_C89) \
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X(float , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_FLOAT , SCC_CSTD_C89) \
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X(for , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_FOR , SCC_CSTD_C89) \
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X(goto , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_GOTO , SCC_CSTD_C89) \
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X(if , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_IF , SCC_CSTD_C89) \
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X(inline , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_INLINE , SCC_CSTD_C99) \
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X(int , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_INT , SCC_CSTD_C89) \
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X(long , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_LONG , SCC_CSTD_C89) \
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X(register , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_REGISTER , SCC_CSTD_C89) \
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X(restrict , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_RESTRICT , SCC_CSTD_C99) \
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X(return , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_RETURN , SCC_CSTD_C89) \
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X(short , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_SHORT , SCC_CSTD_C89) \
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X(signed , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_SIGNED , SCC_CSTD_C89) \
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X(sizeof , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_SIZEOF , SCC_CSTD_C89) \
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X(static , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_STATIC , SCC_CSTD_C89) \
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X(struct , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_STRUCT , SCC_CSTD_C89) \
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X(switch , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_SWITCH , SCC_CSTD_C89) \
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X(typedef , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_TYPEDEF , SCC_CSTD_C89) \
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X(union , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_UNION , SCC_CSTD_C89) \
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X(unsigned , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_UNSIGNED , SCC_CSTD_C89) \
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X(void , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_VOID , SCC_CSTD_C89) \
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X(volatile , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_VOLATILE , SCC_CSTD_C89) \
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X(while , SCC_TOK_SUBTYPE_IDENTIFIER , SCC_TOK_WHILE , SCC_CSTD_C89) \
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// KEYWORD_TABLE
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#define SCC_CTOK_TABLE \
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X(unknown , SCC_TOK_SUBTYPE_INVALID, SCC_TOK_UNKNOWN ) \
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X(EOF , SCC_TOK_SUBTYPE_EOF, SCC_TOK_EOF ) \
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X(blank , SCC_TOK_SUBTYPE_EMPTYSPACE, SCC_TOK_BLANK ) \
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X(endline , SCC_TOK_SUBTYPE_EMPTYSPACE, SCC_TOK_ENDLINE ) \
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X("#" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_SHARP ) \
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X("##" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_SHARP_SHARP ) \
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X("==" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_EQ ) \
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X("=" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_ASSIGN ) \
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X("++" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_ADD_ADD ) \
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X("+=" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_ASSIGN_ADD ) \
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X("+" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_ADD ) \
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X("--" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_SUB_SUB ) \
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X("-=" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_ASSIGN_SUB ) \
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X("->" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_DEREF ) \
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X("-" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_SUB ) \
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X("*=" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_ASSIGN_MUL ) \
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X("*" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_MUL ) \
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X("/=" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_ASSIGN_DIV ) \
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X("/" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_DIV ) \
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X("//" , SCC_TOK_SUBTYPE_COMMENT , SCC_TOK_LINE_COMMENT ) \
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X("/* */" , SCC_TOK_SUBTYPE_COMMENT , SCC_TOK_BLOCK_COMMENT ) \
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X("%=" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_ASSIGN_MOD ) \
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X("%" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_MOD ) \
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X("&&" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_AND_AND ) \
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X("&=" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_ASSIGN_AND ) \
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X("&" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_AND ) \
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X("||" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_OR_OR ) \
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X("|=" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_ASSIGN_OR ) \
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X("|" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_OR ) \
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X("^=" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_ASSIGN_XOR ) \
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X("^" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_XOR ) \
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X("<<=" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_ASSIGN_L_SH ) \
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X("<<" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_L_SH ) \
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X("<=" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_LE ) \
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X("<" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_LT ) \
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X(">>=" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_ASSIGN_R_SH ) \
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X(">>" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_R_SH ) \
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X(">=" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_GE ) \
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X(">" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_GT ) \
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X("!" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_NOT ) \
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X("!=" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_NEQ ) \
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X("~" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_BIT_NOT ) \
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X("[" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_L_BRACKET ) \
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X("]" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_R_BRACKET ) \
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X("(" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_L_PAREN ) \
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X(")" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_R_PAREN ) \
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X("{" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_L_BRACE ) \
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X("}" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_R_BRACE ) \
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X(";" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_SEMICOLON ) \
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X("," , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_COMMA ) \
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X(":" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_COLON ) \
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X("." , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_DOT ) \
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X("..." , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_ELLIPSIS ) \
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X("?" , SCC_TOK_SUBTYPE_OPERATOR, SCC_TOK_COND ) \
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X(ident , SCC_TOK_SUBTYPE_IDENTIFIER, SCC_TOK_IDENT ) \
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X(int , SCC_TOK_SUBTYPE_LITERAL, SCC_TOK_INT_LITERAL ) \
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X(float , SCC_TOK_SUBTYPE_LITERAL, SCC_TOK_FLOAT_LITERAL ) \
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X(char , SCC_TOK_SUBTYPE_LITERAL, SCC_TOK_CHAR_LITERAL ) \
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X(string , SCC_TOK_SUBTYPE_LITERAL, SCC_TOK_STRING_LITERAL ) \
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// END
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/* clang-format on */
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typedef enum scc_tok_type {
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/* clang-format off */
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// must first becase the unknown token must be 0
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#define X(str, subtype, tok) tok,
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SCC_CTOK_TABLE
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#undef X
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#define X(name, type, tok) tok,
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SCC_PPKEYWORD_TABLE
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#undef X
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#define X(name, subtype, tok, std) tok,
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SCC_CKEYWORD_TABLE
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#undef X
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/* clang-format on*/
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} scc_tok_type_t;
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typedef enum scc_tok_subtype {
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SCC_TOK_SUBTYPE_INVALID, // 错误占位
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SCC_TOK_SUBTYPE_OPERATOR, // 操作符
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SCC_TOK_SUBTYPE_IDENTIFIER, // 标识符
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SCC_TOK_SUBTYPE_LITERAL, // 字面量
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SCC_TOK_SUBTYPE_EMPTYSPACE, // 空白
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SCC_TOK_SUBTYPE_COMMENT, // 注释
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SCC_TOK_SUBTYPE_EOF // 结束标记
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} scc_tok_subtype_t;
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/**
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* @brief 词法分析结果
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* @warning 需要手动释放lexeme否则会出现内存泄漏
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*/
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struct scc_lexer_token {
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scc_tok_type_t type;
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scc_cstring_t lexeme;
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scc_pos_t loc;
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};
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scc_tok_subtype_t scc_get_tok_subtype(scc_tok_type_t type);
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const char *scc_get_tok_name(scc_tok_type_t type);
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static inline void scc_lexer_tok_drop(scc_lexer_tok_t *tok) {
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tok->type = SCC_TOK_UNKNOWN;
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tok->loc.col = 0;
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tok->loc.line = 0;
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tok->loc.name = null;
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tok->loc.offset = 0;
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scc_cstring_free(&tok->lexeme);
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}
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static inline cbool scc_lexer_tok_match(const scc_lexer_tok_t *tok,
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scc_tok_type_t type) {
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return tok->type == type;
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}
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// 深拷贝 token
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static inline scc_lexer_tok_t scc_lexer_tok_copy(const scc_lexer_tok_t *src) {
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scc_lexer_tok_t dst = *src;
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dst.lexeme = scc_cstring_copy(&src->lexeme);
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return dst;
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}
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// 移动 token（源 token 不再拥有 lexeme）
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static inline void scc_lexer_tok_move(scc_lexer_tok_t *dst,
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scc_lexer_tok_t *src) {
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*dst = *src;
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src->lexeme.data = null;
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src->lexeme.size = 0;
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src->lexeme.cap = 0;
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}
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#endif /* __SCC_LEXER_TOKEN_H__ */
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