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Implement special character escaping

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This commit is contained in:
Camden Dixie O'Brien 2024-10-25 14:21:23 +01:00
parent a9b8e24007
commit da0175105d
2 changed files with 34 additions and 0 deletions
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4
lib/parser.c
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@ -15,6 +15,7 @@ static bool is_special(char c)
switch (c) {
case '|':
case '.':
case '\\':
return true;
default:
return false;
@ -26,6 +27,9 @@ static int parse_literal(const char *input, int rem, char *out)
if (rem > 0 && !is_special(input[0])) {
*out = input[0];
return 1;
} else if (rem > 1 && '\\' == input[0]) {
*out = input[1];
return 2;
} else {
return -1;
}

30
tests/parser_tests.c
View File

@ -97,6 +97,34 @@ static void dot_is_parsed_as_unquantified_wildcard_term(void)
regex_free_children(&r);
}
static void backslash_dot_is_parsed_as_unquantified_literal(void)
{
regex_t r = { 0 };
const int result = PARSE_REGEX_STRING("\\.", &r);
ASSERT_NE(-1, result);
ASSERT_EQ(1, r.sequence.len);
ASSERT_EQ(QUANTIFIER_NONE, r.sequence.contents[0].quantifier);
ASSERT_EQ(TERM_TYPE_LITERAL, r.sequence.contents[0].type);
ASSERT_EQ('.', r.sequence.contents[0].literal);
regex_free_children(&r);
}
static void backslash_backslash_is_parsed_as_unquantified_literal(void)
{
regex_t r = { 0 };
const int result = PARSE_REGEX_STRING("\\\\", &r);
ASSERT_NE(-1, result);
ASSERT_EQ(1, r.sequence.len);
ASSERT_EQ(QUANTIFIER_NONE, r.sequence.contents[0].quantifier);
ASSERT_EQ(TERM_TYPE_LITERAL, r.sequence.contents[0].type);
ASSERT_EQ('\\', r.sequence.contents[0].literal);
regex_free_children(&r);
}
int main(void)
{
TESTING_BEGIN();
@ -107,5 +135,7 @@ int main(void)
b_is_parsed_as_unquantified_literal();
abc_is_parsed_as_sequence_of_unquantified_literals();
dot_is_parsed_as_unquantified_wildcard_term();
backslash_dot_is_parsed_as_unquantified_literal();
backslash_backslash_is_parsed_as_unquantified_literal();
return TESTING_END();
}