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/* Generated by re2c */
#line 1 "c/submatch/03_posix.re"
// re2c $INPUT -o $OUTPUT
#include <assert.h>
#include <stddef.h>
// Maximum number of capturing groups among all rules.
#line 9 "c/submatch/03_posix.c"
#define YYMAXNMATCH 4
#line 6 "c/submatch/03_posix.re"
struct SemVer { int major, minor, patch; };
static int s2n(const char *s, const char *e) { // pre-parsed string to number
int n = 0;
for (; s < e; ++s) n = n * 10 + (*s - '0');
return n;
}
static bool lex(const char *str, SemVer &ver) {
const char *YYCURSOR = str, *YYMARKER;
// Allocate memory for capturing parentheses (twice the number of groups).
const char *yypmatch[YYMAXNMATCH * 2];
size_t yynmatch;
// Autogenerated tag variables used by the lexer to track tag values.
#line 31 "c/submatch/03_posix.c"
const char *yyt1;
const char *yyt2;
const char *yyt3;
const char *yyt4;
const char *yyt5;
#line 24 "c/submatch/03_posix.re"
#line 41 "c/submatch/03_posix.c"
{
char yych;
yych = *YYCURSOR;
switch (yych) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
yyt1 = YYCURSOR;
goto yy3;
default: goto yy1;
}
yy1:
++YYCURSOR;
yy2:
#line 43 "c/submatch/03_posix.re"
{ return false; }
#line 65 "c/submatch/03_posix.c"
yy3:
yych = *(YYMARKER = ++YYCURSOR);
switch (yych) {
case '.': goto yy4;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': goto yy6;
default: goto yy2;
}
yy4:
yych = *++YYCURSOR;
switch (yych) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
yyt2 = YYCURSOR;
goto yy7;
default: goto yy5;
}
yy5:
YYCURSOR = YYMARKER;
goto yy2;
yy6:
yych = *++YYCURSOR;
switch (yych) {
case '.': goto yy4;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': goto yy6;
default: goto yy5;
}
yy7:
yych = *++YYCURSOR;
switch (yych) {
case 0x00:
yyt4 = yyt5 = NULL;
yyt3 = YYCURSOR;
goto yy8;
case '.':
yyt3 = yyt5 = YYCURSOR;
goto yy9;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': goto yy7;
default: goto yy5;
}
yy8:
++YYCURSOR;
yynmatch = 4;
yypmatch[2] = yyt1;
yypmatch[4] = yyt2;
yypmatch[5] = yyt3;
yypmatch[6] = yyt5;
yypmatch[7] = yyt4;
yypmatch[0] = yyt1;
yypmatch[1] = YYCURSOR;
yypmatch[3] = yyt2 - 1;
#line 33 "c/submatch/03_posix.re"
{
// `yynmatch` is the number of capturing groups
assert(yynmatch == 4);
// Even `yypmatch` values are for opening parentheses, odd values
// are for closing parentheses, the first group is the whole match.
ver.major = s2n(yypmatch[2], yypmatch[3]);
ver.minor = s2n(yypmatch[4], yypmatch[5]);
ver.patch = yypmatch[6] ? s2n(yypmatch[6] + 1, yypmatch[7]) : 0;
return true;
}
#line 162 "c/submatch/03_posix.c"
yy9:
yych = *++YYCURSOR;
if (yych <= 0x00) goto yy5;
goto yy11;
yy10:
yych = *++YYCURSOR;
yy11:
switch (yych) {
case 0x00:
yyt4 = YYCURSOR;
goto yy8;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': goto yy10;
default: goto yy5;
}
}
#line 44 "c/submatch/03_posix.re"
}
int main() {
SemVer v;
assert(lex("23.34", v) && v.major == 23 && v.minor == 34 && v.patch == 0);
assert(lex("1.2.999", v) && v.major == 1 && v.minor == 2 && v.patch == 999);
assert(!lex("1.a", v));
return 0;
}
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