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feat(string): add SStrChr

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This commit is contained in:
fallenoak 2020-11-21 12:11:01 -06:00
parent 87cb6feb94
commit 0dafa3a70a
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3 changed files with 57 additions and 0 deletions
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18
storm/String.cpp
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@ -132,6 +132,24 @@ void GetNextTextUpper(uint32_t* orig, const char** string, uint32_t* upper) {
}
}
const char* SStrChr(const char* string, char search) {
STORM_ASSERT(string);
if (!*string) {
return nullptr;
}
while (*string != search) {
string++;
if (!*string) {
return nullptr;
}
}
return string;
}
int32_t SStrCmp(const char* string1, const char* string2, size_t maxchars) {
return strncmp(string1, string2, maxchars);
}

2
storm/String.hpp
View file

@ -7,6 +7,8 @@
#define STORM_MAX_PATH 260
#define STORM_MAX_STR 0x7FFFFFFF
const char* SStrChr(const char* string, char search);
int32_t SStrCmp(const char* string1, const char* string2, size_t maxchars);
int32_t SStrCmpI(const char* string1, const char* string2, size_t maxchars);

37
test/String.cpp
View file

@ -2,6 +2,43 @@
#include "storm/Memory.hpp"
#include "test/Test.hpp"
TEST_CASE("SStrChr", "[string]") {
SECTION("finds first character when it exists at start of string") {
auto string = "foobar";
auto search = 'f';
auto result = SStrChr(string, search);
REQUIRE(result == string);
}
SECTION("finds first character when it exists in middle of string") {
auto string = "foobar";
auto search = 'b';
auto result = SStrChr(string, search);
REQUIRE(result == string + 3);
}
SECTION("finds first character when it exists at end of string") {
auto string = "foobar";
auto search = 'r';
auto result = SStrChr(string, search);
REQUIRE(result == string + 5);
}
SECTION("returns nullptr when character does not exist in string") {
auto string = "foobar";
auto search = 'z';
auto result = SStrChr(string, search);
REQUIRE(result == nullptr);
}
SECTION("returns nullptr when string is empty") {
auto string = "";
auto search = 'z';
auto result = SStrChr(string, search);
REQUIRE(result == nullptr);
}
}
TEST_CASE("SStrCmp", "[string]") {
SECTION("compares two strings that exactly match correctly") {
auto compare = SStrCmp("foo", "foo", STORM_MAX_STR);