From be8e5fa7e3d1adbdd99a64c2c7bf37e04f443a24 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ilja=20Karta=C5=A1ov?= <elias@lowenware.com>
Date: Fri, 5 Apr 2019 16:20:30 +0200
Subject: [PATCH] Initialize cStuff

---
 cStuff/log.c     | 101 +++++++++++++++++++++++++++++++++++++++++++++++
 cStuff/log.h     |  62 +++++++++++++++++++++++++++++
 cStuff/retcode.h |  28 +++++++++++++
 3 files changed, 191 insertions(+)
 create mode 100644 cStuff/log.c
 create mode 100644 cStuff/log.h
 create mode 100644 cStuff/retcode.h

diff --git a/cStuff/log.c b/cStuff/log.c
new file mode 100644
index 0000000..af6c3e6
--- /dev/null
+++ b/cStuff/log.c
@@ -0,0 +1,101 @@
+/******************************************************************************
+ *
+ *                Copyright (c) 2017-2019 by Löwenware Ltd
+ *             Please, refer LICENSE file for legal information
+ *
+ ******************************************************************************/
+
+/**
+ * @file log.c
+ * @author Ilja Kartašov <ik@lowenware.com>
+ * @brief cStuff log module source file
+ *
+ * @see https://lowenware.com/
+ */
+#include <time.h>
+#include "log.h"
+
+
+void
+cstuff_log_init(cstuff_log_t self, uint8_t level)
+{
+  self->target = stderr;
+  self->level = level;
+}
+
+
+void
+cstuff_log_release(cstuff_log_t self)
+{
+  if (self->target != stderr)
+    fclose(self->target);
+}
+
+
+cstuff_retcode_t
+cstuff_log_set_file(cstuff_log_t self, const char * filename)
+{
+  FILE * fp;
+
+
+  if ( !(fp = fopen(filename, "a")) )
+    return CSTUFF_SYSCALL_ERROR;
+
+  self->target = fp;
+  return CSTUFF_SUCCESS;
+}
+
+
+int
+cstuff_log_printf(cstuff_log_t self, uint8_t level, const char * format, ...)
+{
+  int     result;
+  va_list vl;
+
+  va_start(vl, format);
+  result = cstuff_log_vprintf(self, level, format, vl);
+  va_end(vl);
+
+  return result;
+}
+
+
+int
+cstuff_log_vprintf(cstuff_log_t self,
+                   uint8_t      level,
+                   const char * format,
+                   va_list      vl)
+{
+  int    result;
+
+  if (self->level & level)
+  {
+    FILE    * f = self->target;
+    char    * label;
+    time_t    rawtime;
+    char      strtime[32+1];
+    struct tm timeinfo;
+
+    time (&rawtime);
+    localtime_r (&rawtime, &timeinfo);
+    strftime (strtime, 32, "%F %T", &timeinfo);
+
+    switch (level)
+    {
+      case CSTUFF_LOG_ERROR : label = "!!"; break;
+      case CSTUFF_LOG_ALERT : label = "~!"; break;
+      case CSTUFF_LOG_DEBUG : label = "**"; break;
+      default               : label = "--";
+    }
+
+    result  = fprintf(f, "%s %s ", strtime, label);
+    result += vfprintf(f, format, vl);
+    fputc('\n', f);
+    result++;
+    fflush(f);
+  }
+  else
+    result = 0;
+
+  return result;
+}
diff --git a/cStuff/log.h b/cStuff/log.h
new file mode 100644
index 0000000..e2bcea6
--- /dev/null
+++ b/cStuff/log.h
@@ -0,0 +1,62 @@
+/******************************************************************************
+ *
+ *                Copyright (c) 2017-2019 by Löwenware Ltd
+ *             Please, refer LICENSE file for legal information
+ *
+ ******************************************************************************/
+
+/**
+ * @file log.h
+ * @author Ilja Kartašov <ik@lowenware.com>
+ * @brief cStuff log module header file
+ *
+ * @see https://lowenware.com/cStuff/
+ */
+
+#ifndef CSTUFF_LOG_H_557ADEFE_2BE8_4B9B_A894_F08FF64008EF
+#define CSTUFF_LOG_H_557ADEFE_2BE8_4B9B_A894_F08FF64008EF
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdint.h>
+#include "retcode.h"
+
+#define CSTUFF_LOG_OFF      (0)
+#define CSTUFF_LOG_ERROR    (1<<0)
+#define CSTUFF_LOG_ALERT    (1<<1)
+#define CSTUFF_LOG_STATE    (1<<2)
+#define CSTUFF_LOG_DEBUG    (1<<3)
+#define CSTUFF_LOG_ALL      (0xFF)
+
+struct cstuff_log
+{
+  FILE     * target;
+  uint8_t    level;
+};
+
+typedef struct cstuff_log * cstuff_log_t;
+
+
+void
+cstuff_log_init(cstuff_log_t self, uint8_t level);
+
+
+void
+cstuff_log_release(cstuff_log_t self);
+
+
+cstuff_retcode_t
+cstuff_log_set_file(cstuff_log_t self, const char * filename);
+
+
+int
+cstuff_log_printf(cstuff_log_t self, uint8_t level, const char * format, ...);
+
+
+int
+cstuff_log_vprintf(cstuff_log_t self,
+                   uint8_t      level,
+                   const char * format,
+                   va_list      vl);
+
+#endif /* !CSTUFF_LOG_H */
diff --git a/cStuff/retcode.h b/cStuff/retcode.h
new file mode 100644
index 0000000..82c425b
--- /dev/null
+++ b/cStuff/retcode.h
@@ -0,0 +1,28 @@
+/******************************************************************************
+ *
+ *                Copyright (c) 2017-2019 by Löwenware Ltd
+ *             Please, refer LICENSE file for legal information
+ *
+ ******************************************************************************/
+
+/**
+ * @file retcode.h
+ * @author Ilja Kartašov <ik@lowenware.com>
+ * @brief cStuff return codes
+ *
+ * @see https://lowenware.com/
+ */
+
+#ifndef CSTUFF_RETCODE_H_CBA3C16B_88D6_49F4_966D_DBDA727583FE
+#define CSTUFF_RETCODE_H_CBA3C16B_88D6_49F4_966D_DBDA727583FE
+
+typedef enum
+{
+    CSTUFF_MALLOC_ERROR  = -2
+  , CSTUFF_SYSCALL_ERROR = -1
+  , CSTUFF_SUCCESS = 0
+  , CSTUFF_IDLE    = 1
+
+} cstuff_retcode_t;
+
+#endif /* !CSTUFF_RETCODE_H */