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string: Add a lowercase() function 

This function strips out special characters and returns the lowercase
version of the string.

Signed-off-by: Anna Schumaker <Anna@OcarinaProject.net>
This commit is contained in:
Anna Schumaker 2015-01-30 09:32:27 -05:00
parent cc6f4c9293
commit 7733e24c07
3 changed files with 76 additions and 0 deletions
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49
core/string.cpp
View File

@ -60,3 +60,52 @@ const std::string string :: sec2str_detailed(unsigned int sec)
res += _time_detail(sec, 0, "second");
return res;
}
static char _to_lower(char c)
{
if ((c >= 'a') && (c <= 'z'))
return c;
if ((c >= '0') && (c <= '9'))
return c;
if ((c >= 'A') && (c <= 'Z'))
return c + ('a' - 'A');
switch (c) {
case '\\':
case '/':
case ',':
case ';':
case '(':
case ')':
case '_':
case '-':
case '~':
case '+':
case '"':
case ' ':
case ' ':
return ' ';
default:
return 0;
}
}
const std::string string :: lowercase(const std::string &str)
{
std::string ret;
char c, last = ' ';
for (unsigned int i = 0; i < str.size(); i++) {
c = _to_lower(str[i]);
if (c > 0) {
if ((c != ' ') || (last != ' '))
ret += c;
last = c;
}
}
if (ret[ret.size() - 1] == ' ')
return ret.substr(0, ret.size() - 1);
return ret;
}

8
include/core/string.h
View File

@ -34,6 +34,14 @@ namespace string
* months, hours, minutes, and seconds.
*/
const std::string sec2str_detailed(unsigned int);
/**
* Convert a string to lowercase, stripping out special characters
* along the way.
* @param str Input string.
* @return The same string converted to lowercase.
*/
const std::string lowercase(const std::string &);
}
#endif /* OCARINA_CORE_STRING_H */

19
tests/core/string.cpp
View File

@ -52,9 +52,28 @@ void test_sec2str_detailed()
test_equal(string :: sec2str_detailed(2), "2 seconds");
}
void test_lowercase()
{
test_equal(string :: lowercase(" "), "");
test_equal(string :: lowercase(" test \
text"), "test text");
test_equal(string :: lowercase("test/text"), "test text");
test_equal(string :: lowercase("Test, Text"), "test text");
test_equal(string :: lowercase("Test? Text!"), "test text");
test_equal(string :: lowercase("Test?123 Text!456"), "test123 text456");
test_equal(string :: lowercase("Test?123 Text!456"), "test123 text456");
test_equal(string :: lowercase("Test(text);123-456"), "test text 123 456");
test_equal(string :: lowercase("Test((text));;123--456"), "test text 123 456");
test_equal(string :: lowercase("! __test(TEXT) + __test(\"TEXT\")"),
"test text test text");
test_equal(string :: lowercase("Test~tEXt\\123"), "test text 123");
}
int main(int argc, char **argv)
{
test :: run("Unsigned to String Test", test_utos);
test :: run("Seconds to String Test", test_sec2str);
test :: run("Seconds to String (Detailed) Test", test_sec2str_detailed);
test :: run("String Lowercase Test", test_lowercase);
}