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// re2c $INPUT -o $OUTPUT --loop-switch -i
#include <assert.h>
#include <stdlib.h>
#include <string.h>
/*!max:re2c*/
// 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:
/*!re2c
re2c:api:style = free-form;
re2c:define:YYCTYPE = char;
re2c:define:YYFILL = "return -1;";
* { return -1; }
[\x00] { return YYCURSOR + YYMAXFILL - 1 == YYLIMIT ? count : -1; }
['] ([^'\\] | [\\][^])* ['] { ++count; goto loop; }
[ ]+ { goto loop; }
*/
}
// 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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