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/* Generated by re2c */
// re2c $INPUT -o $OUTPUT --loop-switch -i
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#define YYMAXFILL 1
// expect YYMAXFILL-padded string
static int lex(const char *str, unsigned int len)
{
const char *YYCURSOR = str, *YYLIMIT = str + len + YYMAXFILL;
int count = 0;
loop:
{
char yych;
unsigned int yystate = 0;
for (;;) {
switch (yystate) {
case 0:
if (YYLIMIT <= YYCURSOR) return -1;
yych = *YYCURSOR;
++YYCURSOR;
switch (yych) {
case 0x00:
yystate = 1;
continue;
case ' ':
yystate = 3;
continue;
case '\'':
yystate = 5;
continue;
default:
yystate = 2;
continue;
}
case 1: { return YYCURSOR + YYMAXFILL - 1 == YYLIMIT ? count : -1; }
case 2: { return -1; }
case 3:
if (YYLIMIT <= YYCURSOR) return -1;
yych = *YYCURSOR;
switch (yych) {
case ' ':
++YYCURSOR;
yystate = 3;
continue;
default:
yystate = 4;
continue;
}
case 4: { goto loop; }
case 5:
if (YYLIMIT <= YYCURSOR) return -1;
yych = *YYCURSOR;
++YYCURSOR;
switch (yych) {
case '\'':
yystate = 6;
continue;
case '\\':
yystate = 7;
continue;
default:
yystate = 5;
continue;
}
case 6: { ++count; goto loop; }
case 7:
if (YYLIMIT <= YYCURSOR) return -1;
++YYCURSOR;
yystate = 5;
continue;
}
}
}
}
// make a copy of the string with YYMAXFILL zeroes at the end
static void test(const char *str, unsigned int len, int res)
{
char *s = (char*) malloc(len + YYMAXFILL);
memcpy(s, str, len);
memset(s + len, 0, YYMAXFILL);
int r = lex(s, len);
free(s);
assert(r == res);
}
#define TEST(s, r) test(s, sizeof(s) - 1, r)
int main()
{
TEST("", 0);
TEST("'qu\0tes' 'are' 'fine: \\'' ", 3);
TEST("'unterminated\\'", -1);
return 0;
}
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