From 88bd6945554aea926123c39d9bc44cc1f525d218 Mon Sep 17 00:00:00 2001
From: Tom Smeding <tom.smeding@gmail.com>
Date: Mon, 19 Oct 2020 18:14:49 +0200
Subject: Initial

---
 .gitignore |  2 ++
 Makefile   | 30 ++++++++++++++++++++++++++++++
 main.cpp   | 27 +++++++++++++++++++++++++++
 3 files changed, 59 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Makefile
 create mode 100644 main.cpp

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..38a0404
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/obj
+datetags
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..834f021
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,30 @@
+CXX = g++
+CXXFLAGS = -Wall -Wextra -std=c++17 -O2 -g -flto
+LDFLAGS = $(CXXFLAGS)
+TARGET = datetags
+
+SOURCES = $(wildcard *.cpp)
+
+OBJDIR = obj
+
+.PHONY: all clean
+
+all: $(TARGET)
+
+clean:
+	@echo "Cleaning"
+	@rm -f $(TARGET)
+	@rm -rf $(OBJDIR)
+
+
+$(OBJDIR)/%.o: %.cpp $(wildcard *.h) | $(OBJDIR)
+	@mkdir -p $(dir $@)
+	@echo "CXX $<"
+	@$(CXX) $(CXXFLAGS) -c -o $@ $<
+
+$(TARGET): $(patsubst %.cpp,$(OBJDIR)/%.o,$(SOURCES)) | $(OBJDIR)
+	@echo "LD -o $@"
+	@$(CXX) -o $@ $^ $(LDFLAGS)
+
+$(OBJDIR):
+	@mkdir -p $(OBJDIR)
diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..51262e9
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,27 @@
+#include <iostream>
+#include <ctime>
+#include <sys/time.h>
+
+
+int main() {
+	std::string line;
+	while (std::getline(std::cin, line)) {
+		struct timeval tv;
+		gettimeofday(&tv, nullptr);
+
+		const struct tm *tm = localtime(&tv.tv_sec);
+
+		char buffer[128];
+		const ssize_t nw =
+			strftime(buffer, sizeof buffer - 7, "%Y-%m-%d %H:%M:%S.", tm);
+
+		int multiplier = 100000;
+		for (int i = 0; i < 6; i++) {
+			buffer[nw + i] = '0' + tv.tv_usec / multiplier % 10;
+			multiplier /= 10;
+		}
+		buffer[nw + 6] = '\0';
+
+		std::cout << buffer << ' ' << line << std::endl;
+	}
+}
-- 
cgit v1.2.3-54-g00ecf