Created
October 16, 2020 00:21
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// re2c $INPUT -o $OUTPUT | |
#include <assert.h> | |
#include <stdint.h> | |
#include <unistd.h> | |
/*!maxnmatch:re2c*/ | |
static const uint64_t ERROR = ~0lu; | |
struct match { | |
size_t so, eo; | |
}; | |
static uint64_t lex(const char *YYCURSOR, struct match matches[]) | |
{ | |
const char *YYMARKER; | |
const char *yypmatch[YYMAXNMATCH * 2]; | |
const char *start = YYCURSOR; | |
uint32_t yynmatch; | |
/*!stags:re2c format = 'const char *@@;'; */ | |
/*!re2c | |
re2c:yyfill:enable = 0; | |
re2c:flags:posix-captures = 1; | |
re2c:define:YYCTYPE = char; | |
ip = ((([0-9]{1,3})[.]){3}[0-9]{1,3}) ; | |
[ \t]* ("") [ \t]+ ((( ip ([/][0-9]+){0,1} )|(((([0-9a-f:]{2,39}))|(([0-9a-f:]{0,29}[:]((([0-9]{1,3})[.]){3}[0-9]{1,3}))))([/][0-9]+){0,1}))|([-a-z0-9._]+))[ \t\n]*[\x00] { | |
for(size_t x = 0; x < yynmatch; x++) { | |
matches[x].so = yypmatch[x*2] - start; | |
matches[x].eo = yypmatch[x*2+1] - start; | |
} | |
return yynmatch; | |
} | |
* { return ERROR; } | |
*/ | |
} | |
int main() | |
{ | |
struct match matches[YYMAXNMATCH]; | |
uint64_t mno = lex(" 127.0.0.1/24", matches); | |
return mno; | |
} |
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