From be4f102b8aa16bb90ed7d8d51a84650987dfdb40 Mon Sep 17 00:00:00 2001
From: Danny Holman <dholman@gymli.org>
Date: Fri, 18 Nov 2022 09:56:13 -0600
Subject: server: add a logging framework

Add a logging framework so the server can output to a single point.

Signed-off-by: Danny Holman <dholman@gymli.org>
---
 .gitignore               |  4 ++--
 server/include/logging.h | 18 +++++++++++++++++
 server/src/logging.c     | 51 ++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 71 insertions(+), 2 deletions(-)
 create mode 100644 server/include/logging.h
 create mode 100644 server/src/logging.c

diff --git a/.gitignore b/.gitignore
index dcbc549..320e898 100644
--- a/.gitignore
+++ b/.gitignore
@@ -36,8 +36,8 @@ configure~
 config.log
 config.status
 depcomp
-include/config.h
-include/stamp-h1
+config.h
+stamp-h1
 install-sh
 Makefile
 missing
diff --git a/server/include/logging.h b/server/include/logging.h
new file mode 100644
index 0000000..a964230
--- /dev/null
+++ b/server/include/logging.h
@@ -0,0 +1,18 @@
+#ifndef MRAT_LOGGING_H
+#define MRAT_LOGGING_H
+
+#include <stdio.h>
+#include <stdarg.h>
+
+enum LOG_LEVEL {
+        LOG_SEVERE,
+        LOG_WARNING,
+        LOG_INFO,
+        LOG_DEBUG,
+};
+
+int init_logging(FILE *out_file);
+int vlog_msg(int level, const char *fmt, va_list args);
+int log_msg(int level, const char *fmt, ...);
+
+#endif
diff --git a/server/src/logging.c b/server/src/logging.c
new file mode 100644
index 0000000..9084baf
--- /dev/null
+++ b/server/src/logging.c
@@ -0,0 +1,51 @@
+#include <logging.h>
+#include <stdio.h>
+#include <pthread.h>
+
+static const char *severe = "SEVERE";
+static const char *warn = "WARN";
+static const char *info = "INFO";
+static const char *debug = "DEBUG";
+
+static FILE *out_stream;
+
+int init_logging(FILE *out_file) {
+        // TODO: maybe make this a bit more thread safe
+        out_stream = out_file;
+        return 0;
+}
+
+int vlog_msg(int level, const char *fmt, va_list args) {
+        char output[1024];
+        int ret = 0;
+        switch (level) {
+                case LOG_SEVERE:
+                        snprintf(output, 1024, "%s: %s", severe, fmt);
+                        ret = vfprintf(out_stream, output, args);
+                        break;
+                case LOG_WARNING:
+                        snprintf(output, 1024, "%s: %s", warn, fmt);
+                        ret = vfprintf(out_stream, output, args);
+                        break;
+                case LOG_INFO:
+                        snprintf(output, 1024, "%s: %s", info, fmt);
+                        ret = vfprintf(out_stream, output, args);
+                        break;
+                case LOG_DEBUG:
+                        snprintf(output, 1024, "%s: %s", debug, fmt);
+                        ret = vfprintf(out_stream, output, args);
+                        break;
+        }
+        return ret;
+}
+
+int log_msg(int level, const char *fmt, ...) {
+        va_list args;
+        int done;
+
+        va_start(args, fmt);
+        done = vlog_msg(level, fmt, args);
+        va_end(args);
+
+        return done;
+}
-- 
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