varlist: move to a separate header, add join

2 files changed, 87 insertions, 0 deletions

diff --git a/src/helpers/VarList.cpp b/src/helpers/VarList.cpp
new file mode 100644
index 00000000..0da86e15
--- /dev/null
+++ b/src/helpers/VarList.cpp
@@ -0,0 +1,46 @@
+#include "VarList.hpp"
+
+CVarList::CVarList(const std::string& in, long unsigned int lastArgNo, const char separator) {
+    std::string curitem  = "";
+    std::string argZ     = in;
+    const bool  SPACESEP = separator == 's';
+
+    auto        nextItem = [&]() {
+        auto idx = lastArgNo != 0 && m_vArgs.size() >= lastArgNo - 1 ? std::string::npos : ([&]() -> size_t {
+            if (!SPACESEP)
+                return argZ.find_first_of(separator);
+
+            uint64_t pos = -1;
+            while (!std::isspace(argZ[++pos]) && pos < argZ.length())
+                ;
+
+            return pos < argZ.length() ? pos : std::string::npos;
+        }());
+
+        if (idx != std::string::npos) {
+            curitem = argZ.substr(0, idx);
+            argZ    = argZ.substr(idx + 1);
+        } else {
+            curitem = argZ;
+            argZ    = STRVAL_EMPTY;
+        }
+    };
+
+    nextItem();
+
+    while (curitem != STRVAL_EMPTY) {
+        m_vArgs.push_back(removeBeginEndSpacesTabs(curitem));
+        nextItem();
+    }
+}
+
+std::string CVarList::join(const std::string& joiner, size_t from, size_t to) const {
+    size_t      last = to == 0 ? size() : to;
+
+    std::string rolling;
+    for (size_t i = from; i < last; ++i) {
+        rolling += m_vArgs[i] + (i + 1 < last ? joiner : "");
+    }
+
+    return rolling;
+}
\ No newline at end of file
diff --git a/src/helpers/VarList.hpp b/src/helpers/VarList.hpp
new file mode 100644
index 00000000..0c83a3db
--- /dev/null
+++ b/src/helpers/VarList.hpp
@@ -0,0 +1,41 @@
+#pragma once
+#include <vector>
+#include <string>
+#include "../macros.hpp"
+
+class CVarList {
+  public:
+    /* passing 's' as a separator will use std::isspace */
+    CVarList(const std::string& in, long unsigned int lastArgNo = 0, const char separator = ',');
+
+    ~CVarList() = default;
+
+    size_t size() const {
+        return m_vArgs.size();
+    }
+
+    std::string join(const std::string& joiner, size_t from = 0, size_t to = 0) const;
+
+    std::string operator[](const long unsigned int& idx) const {
+        if (idx >= m_vArgs.size())
+            return "";
+        return m_vArgs[idx];
+    }
+
+    // for range-based loops
+    std::vector<std::string>::iterator begin() {
+        return m_vArgs.begin();
+    }
+    std::vector<std::string>::const_iterator begin() const {
+        return m_vArgs.begin();
+    }
+    std::vector<std::string>::iterator end() {
+        return m_vArgs.end();
+    }
+    std::vector<std::string>::const_iterator end() const {
+        return m_vArgs.end();
+    }
+
+  private:
+    std::vector<std::string> m_vArgs;
+};
\ No newline at end of file