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Use custom implementation rather the sscanf in str_to_int

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This commit is contained in:
Maxime Coste 2015-03-30 23:34:08 +01:00
parent 166682d802
commit 335c73a09b
2 changed files with 19 additions and 4 deletions
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17
src/string.cc
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@ -100,10 +100,19 @@ String indent(StringView str, StringView indent)
int str_to_int(StringView str)
{
int res = 0;
if (sscanf(str.zstr(), "%i", &res) != 1)
throw runtime_error(str + "is not a number");
return res;
unsigned int res = 0;
bool negative = false;
for (auto it = str.begin(), end = str.end(); it != end; ++it)
{
const char c = *it;
if (it == str.begin() and c == '-')
negative = true;
else if (c >= '0' and c <= '9')
res = res * 10 + c - '0';
else
throw runtime_error(str + "is not a number");
}
return negative ? -(int)res : (int)res;
}
String to_string(int val)

6
src/unit_tests.cc
View File

@ -139,6 +139,12 @@ void test_string()
kak_assert(not subsequence_match("tchou kanaky", "tchou kanaky"));
kak_assert(format("Youhou {1} {} {0} \\{}", 10, "hehe", 5) == "Youhou hehe 5 10 {}");
kak_assert(str_to_int("5") == 5);
kak_assert(str_to_int(to_string(INT_MAX)) == INT_MAX);
kak_assert(str_to_int(to_string(INT_MIN)) == INT_MIN);
kak_assert(str_to_int("00") == 0);
kak_assert(str_to_int("-0") == 0);
}
void test_keys()