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/* Generated by re2c */
// re2c $INPUT -o $OUTPUT --loop-switch -i
#include <assert.h>
#include <stdlib.h>
#include <string.h>
// expect a string without terminating null
static int lex(const char *str, unsigned int len)
{
const char *cur = str, *lim = str + len, *mar;
int count = 0;
loop:
{
char yych;
unsigned int yystate = 0;
for (;;) {
switch (yystate) {
case 0:
yych = cur < lim ? *cur : 0;
switch (yych) {
case ' ':
++cur;
yystate = 3;
continue;
case '\'':
++cur;
yystate = 5;
continue;
default:
if (cur >= lim) {
yystate = 10;
continue;
}
++cur;
yystate = 1;
continue;
}
case 1:
yystate = 2;
continue;
case 2: { return -1; }
case 3:
yych = cur < lim ? *cur : 0;
switch (yych) {
case ' ':
++cur;
yystate = 3;
continue;
default:
yystate = 4;
continue;
}
case 4: { goto loop; }
case 5:
mar = cur;
yych = cur < lim ? *cur : 0;
if (yych >= 0x01) {
yystate = 7;
continue;
}
if (cur >= lim) {
yystate = 2;
continue;
}
++cur;
yystate = 6;
continue;
case 6:
yych = cur < lim ? *cur : 0;
yystate = 7;
continue;
case 7:
switch (yych) {
case '\'':
++cur;
yystate = 8;
continue;
case '\\':
++cur;
yystate = 9;
continue;
default:
if (cur >= lim) {
yystate = 11;
continue;
}
++cur;
yystate = 6;
continue;
}
case 8: { ++count; goto loop; }
case 9:
yych = cur < lim ? *cur : 0;
if (yych <= 0x00) {
if (cur >= lim) {
yystate = 11;
continue;
}
++cur;
yystate = 6;
continue;
}
++cur;
yystate = 6;
continue;
case 10: { return count; }
case 11:
cur = mar;
yystate = 2;
continue;
}
}
}
}
// make a copy of the string without terminating null
static void test(const char *str, unsigned int len, int res)
{
char *s = (char*) malloc(len);
memcpy(s, str, len);
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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