Add some string helpers and unit tests

functions int_to_str(int) and split(const String&, Character),
plus corresponding unit tests

1 files changed, 46 insertions, 0 deletions

diff --git a/src/string.cc b/src/string.cc
new file mode 100644
index 00000000..30654256
--- /dev/null
+++ b/src/string.cc
@@ -0,0 +1,46 @@
+#include "string.hh"
+
+namespace Kakoune
+{
+
+String int_to_str(int value)
+{
+    const bool negative = value < 0;
+    if (negative)
+        value = -value;
+
+    char buffer[16];
+    size_t pos = sizeof(buffer);
+    buffer[--pos] = 0;
+    do
+    {
+        buffer[--pos] = '0' + (value % 10);
+        value /= 10;
+    }
+    while (value);
+
+    if (negative)
+       buffer[--pos] = '-';
+
+    return String(buffer + pos);
+}
+
+std::vector<String> split(const String& str, Character separator)
+{
+    auto begin = str.begin();
+    auto end   = str.begin();
+
+    std::vector<String> res;
+    while (end != str.end())
+    {
+        while (end != str.end() and *end != separator)
+            ++end;
+        res.push_back(String(begin, end));
+        if (end == str.end())
+            break;
+        begin = ++end;
+    }
+    return res;
+}
+
+}