re.h

/****************************************************************************
**
** Copyright (C) 2020 @scriptiot
**
**  EVM是一款通用化设计的虚拟机引擎，拥有语法解析前端接口、编译器、虚拟机和虚拟机扩展接口框架。
**  支持js、python、qml、lua等多种脚本语言，纯Ｃ开发，零依赖，内置REPL，支持主流 ROM > 40KB, RAM > 2KB的MCU;
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**  Version	: 1.0
**  Email	: scriptiot@aliyun.com
**  Website	: https://github.com/scriptiot/evm
**            https://gitee.com/scriptiot/evm
**  Licence: Apache-2.0
****************************************************************************/

/*
 *
 * Mini regex-module inspired by Rob Pike's regex code described in:
 *
 * http://www.cs.princeton.edu/courses/archive/spr09/cos333/beautiful.html
 *
 *
 *
 * Supports:
 * ---------
 *   '.'        Dot, matches any character
 *   '^'        Start anchor, matches beginning of string
 *   '$'        End anchor, matches end of string
 *   '*'        Asterisk, match zero or more (greedy)
 *   '+'        Plus, match one or more (greedy)
 *   '?'        Question, match zero or one (non-greedy)
 *   '[abc]'    Character class, match if one of {'a', 'b', 'c'}
 *   '[^abc]'   Inverted class, match if NOT one of {'a', 'b', 'c'} -- NOTE: feature is currently broken!
 *   '[a-zA-Z]' Character ranges, the character set of the ranges { a-z | A-Z }
 *   '\s'       Whitespace, \t \f \r \n \v and spaces
 *   '\S'       Non-whitespace
 *   '\w'       Alphanumeric, [a-zA-Z0-9_]
 *   '\W'       Non-alphanumeric
 *   '\d'       Digits, [0-9]
 *   '\D'       Non-digits
 *
 *
 */

#ifdef __cplusplus
extern "C"{
#endif



/* Typedef'd pointer to get abstract datatype. */
typedef struct regex_t* re_t;


/* Compile regex string pattern to a regex_t-array. */
re_t re_compile(const char* pattern);


/* Find matches of the compiled pattern inside text. */
int  re_matchp(re_t pattern, const char* text);


/* Find matches of the txt pattern inside text (will compile automatically first). */
int  re_match(const char* pattern, const char* text);


#ifdef __cplusplus
}
#endif