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project-codenet / tools /tokenizer /libtoken.h
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/* Copyright (c) 2021, 2022 International Business Machines Corporation
Prepared by: Geert Janssen <geert@us.ibm.com>
Code functionality shared by all tokenizers.
*/
#ifndef LIBTOKEN_H
#define LIBTOKEN_H
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#ifdef __cplusplus
extern "C" {
#endif
#define MAX_BUF 8 // maximum lookahead in chars
/* Let's assume UTF-8 encoding.
https://www.cprogramming.com/tutorial/unicode.html
https://opensource.apple.com/source/tidy/tidy-2.2/tidy/src/utf8.c.auto.html
*/
// Test for start of UTF-8 sequence.
#define utf8_start(cc) (((cc)&0xC0)!=0x80)
#define utf8_follow(cc) (((cc)&0xC0)==0x80)
#define utf8_len(cc) \
(((cc)&0xF8)==0xF0 ? 4 : ((cc)&0xF0)==0xE0 ? 3 : ((cc)&0xE0)==0xC0 ? 2 : 1)
typedef enum { C, CPP, JAVA, JAVASCRIPT, PYTHON } Language;
// Program globals:
extern const char *filename/*= "stdin"*/; // current file being parsed
extern unsigned linenr/*= 1*/; // physical line number counted from 1
extern unsigned column/*= 0*/; // char position in physical line, from 0
extern unsigned saved_col/*= 0*/; // 1-place buf for last column on prev line
extern unsigned char_count/*= 0*/; // total char/byte count
extern unsigned utf8_count/*= 0*/; // total utf-8 char count
extern unsigned buffered/*= 0*/; // number of buffered chars
extern int buffer[MAX_BUF]; // use buffer as multi-char lookahead.
// Program option settings:
extern int debug/*= 0*/; // when 1 debug output to stderr
extern int verbose/*= 0*/; // when 1 info output to stderr
extern int nowarn/*= 0*/; // when 1 warnings are suppressed
extern unsigned illegals/*= 0*/; // count number of illegal characters
extern unsigned unexpect_eof/*= 0*/; // encountered unexpected EOF
extern int hash_as_comment/*= 0*/; // when 1 treat # as line comment
extern int newline_token/*= 0*/; // when 1 output newline pseudo-token
extern int comment_token/*= 0*/; // when 1 output comments as tokens
extern int whitespace_token/*= 0*/; // when 1 output adjacent white-space as a token
extern int continuation_token/*= 0*/; // when 1 output line continuation pseudo-token
enum TokenClass {
/* 0*/ IDENTIFIER,
/* 1*/ KEYWORD,
/* 2*/ STRING,
/* 3*/ CHARACTER,
/* 4*/ INTEGER,
/* 5*/ FLOATING,
/* 6*/ OPERATOR,
/* 7*/ PREPROCESSOR,
/* 8*/ LINE_COMMENT,
/* 9*/ BLOCK_COMMENT,
/*10*/ WHITESPACE,
/*11*/ NEWLINE,
/*12*/ CONTINUATION,
/*13*/ FILENAME,
/*14*/ ENDOFFILE
};
extern const char *token_class[];
// keyword lookup function (pointer variable):
// (initialized by set_or_detect_lang())
extern const char *(*is_keyword)(const char *);
extern int get(void);
extern void unget(int cc);
extern Language set_or_detect_lang(const char *source);
extern const char *lang_name(Language lang);
extern int open_as_stdin(const char *file);
extern unsigned C_tokenize_int(const char **token, enum TokenClass *type,
unsigned *line, unsigned *col, unsigned *pos);
extern unsigned C_tokenize(const char **token, const char **type,
unsigned *line, unsigned *col, unsigned *pos);
extern void RAW_escape(FILE *out, const char *token);
extern void CSV_escape(FILE *out, const char *token);
extern void JSON_escape(FILE *out, const char *token);
extern void XML_escape(FILE *out, const char *token);
#ifdef __cplusplus
}
#endif
#endif /* LIBTOKEN_H */