Add translation system.

src/mrchat.c

@@ -231,17 +231,17 @@ mrpoortext_t* mrchat_get_last_summary(mrchat_t* ths)
 	}
 
 	if( ths == NULL ) {
-		ret->m_text = safe_strdup("No chat.");
+		ret->m_text = safe_strdup("ErrNoChat"); /* should not happen */
 		return ret;
 	}
 
 	if( ths->m_last_msg == NULL ) {
-		ret->m_text = safe_strdup("No messages.");
+		ret->m_text = safe_strdup(mrstock_str(MR_STR_NO_MESSAGES));
 		return ret;
 	}
 
 	if( ths->m_last_msg->m_from_id == 0 ) {
-		ret->m_title = safe_strdup("You");
+		ret->m_title = safe_strdup(mrstock_str(MR_STR_YOU));
 		ret->m_title_meaning = MR_TITLE_USERNAME;
 	}
 	else {

src/mrmailbox.h

@@ -55,6 +55,7 @@ extern "C" {
 #include "mrimap.h"
 #include "mrcontact.h"
 #include "mrpoortext.h"
+#include "mrstock.h"
 
 
 typedef struct mrmailbox_t

src/mrstock.c

@@ -0,0 +1,101 @@
+/*******************************************************************************
+ *
+ *                             Messenger Backend
+ *     Copyright (C) 2016 Björn Petersen Software Design and Development
+ *                   Contact: r10s@b44t.com, http://b44t.com
+ *
+ * This program is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later
+ * version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see http://www.gnu.org/licenses/ .
+ *
+ *******************************************************************************
+ *
+ * File:    mrstock.h
+ * Authors: Björn Petersen
+ * Purpose: Add translated strings that are used by the messager backend
+ *
+ ******************************************************************************/
+
+
+#include <stdlib.h>
+#include <memory.h>
+#include "mrmailbox.h"
+#include "mrtools.h"
+
+
+static char** s_obj = NULL;
+static int    s_def_strings_added = 0;
+
+
+static void mrstock_init_array_()
+{
+	if( s_obj ) {
+		return; /* already initialized*/
+	}
+
+	size_t bytes_needed = sizeof(char*) * MR_STR_COUNT_;
+	if( (s_obj=malloc(bytes_needed)) == NULL ) {
+		exit(13); /* unrecoverable error */
+	}
+    memset(s_obj, 0, bytes_needed);
+    s_def_strings_added = 0;
+}
+
+
+void mrstock_exit(void)
+{
+	if( s_obj ) {
+		size_t i;
+		for( i = 0; i < MR_STR_COUNT_; i++ ) {
+			if( s_obj[i] ) {
+				free(s_obj[i]);
+			}
+		}
+		free(s_obj);
+		s_obj = NULL;
+	}
+	s_def_strings_added = 0;
+}
+
+
+void mrstock_add_str(int id, const char* str)
+{
+	if( id < 0 || id >= MR_STR_COUNT_ || str == NULL ) {
+		return; /* error */
+	}
+
+	mrstock_init_array_();
+
+	if( s_obj[id] ) {
+		free(s_obj[id]);
+	}
+
+	s_obj[id] = strdup(str);
+}
+
+
+const char* mrstock_str(int id)
+{
+	/* init array */
+	mrstock_init_array_();
+
+	if( s_obj[id] == NULL && !s_def_strings_added ) {
+		/* init strings */
+		s_def_strings_added = 1;
+		mrstock_add_str(MR_STR_NO_CHAT,     "No chat.");
+		mrstock_add_str(MR_STR_NO_MESSAGES, "No messages.");
+		mrstock_add_str(MR_STR_YOU,         "You");
+	}
+
+	return s_obj[id]? s_obj[id] : "Err"; /* the result must not be freed! */
+}
+

src/mrstock.h

@@ -0,0 +1,62 @@
+/*******************************************************************************
+ *
+ *                             Messenger Backend
+ *     Copyright (C) 2016 Björn Petersen Software Design and Development
+ *                   Contact: r10s@b44t.com, http://b44t.com
+ *
+ * This program is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later
+ * version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see http://www.gnu.org/licenses/ .
+ *
+ *******************************************************************************
+ *
+ * File:    mrstock.h
+ * Authors: Björn Petersen
+ * Purpose: Add translated strings that are used by the messager backend
+ *
+ ******************************************************************************/
+
+
+#ifndef __MRSTOCK_H__
+#define __MRSTOCK_H__
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+#define MR_STR_NO_CHAT         0 /* the IDs must not change! No gaps, please */
+#define MR_STR_NO_MESSAGES     1
+#define MR_STR_YOU             2
+#define MR_STR_COUNT_          3
+
+
+/* mrstock_set_str() adds a string to the repository. A copy of the given string
+is made. Usually, this is used to pass translated strings to the backend. */
+void         mrstock_add_str (int id, const char*);
+
+/* frees all strings allocated by mrstock_set_str().  Usually, there is no need
+to call this function - when the program terminates, usually all strings are
+free automatically.  However, this function may be handy if you watch the memory
+for leaks using some special tools. */
+void         mrstock_exit    (void);
+
+
+/*** library-private **********************************************************/
+
+const char*  mrstock_str     (int id); /* the result must not be freed! */
+
+
+#ifdef __cplusplus
+} /* /extern "C" */
+#endif
+#endif /* __MRSTOCKSTR_H__ */
+

src/mrtools.c

@@ -553,63 +553,23 @@ time_t mr_timestamp_from_date(struct mailimf_date_time * date_time) /* from mail
 }
 
 
-static char* get_month_name(int zero_based_month)
-{
-	const char* p = NULL;
-	switch( zero_based_month )
-	{
-		case  0: p = "Jan."; break;
-		case  1: p = "Feb."; break;
-		case  2: p = "Mar."; break;
-		case  3: p = "Apr."; break;
-		case  4: p = "May";  break;
-		case  5: p = "Jun."; break;
-		case  6: p = "Jul."; break;
-		case  7: p = "Aug."; break;
-		case  8: p = "Sep."; break;
-		case  9: p = "Oct."; break;
-		case 10: p = "Nov."; break;
-		case 11: p = "Dev."; break;
-	}
-	return safe_strdup(p);
-}
-
-
 char* mr_timestamp_to_str(time_t wanted)
 {
 	char* temp;
 
 	struct tm wanted_struct;
-
 	memcpy(&wanted_struct, localtime(&wanted), sizeof(struct tm));
 
+	/* if you need the current time for relative dates, use the following lines:
 	time_t curr;
 	struct tm curr_struct;
 	time(&curr);
-
 	memcpy(&curr_struct, localtime(&curr), sizeof(struct tm));
+	*/
 
-	if( wanted_struct.tm_year == curr_struct.tm_year )
-	{
-		if( wanted_struct.tm_mday == curr_struct.tm_mday /* 1..31 */
-		 && wanted_struct.tm_mon == curr_struct.tm_mon ) /* 0..11 */
-		{
-			/* same year, same day - print time */
-			temp = sqlite3_mprintf("%02i:%02i", (int)wanted_struct.tm_hour, (int)wanted_struct.tm_min);
-		}
-		else
-		{
-			/* same year, different day/month - print date but year */
-			char* month_name = get_month_name(wanted_struct.tm_mon);
-			temp = sqlite3_mprintf("%02i. %s", (int)wanted_struct.tm_mday, month_name);
-			free(month_name);
-		}
-	}
-	else
-	{
-		/* different year - print whole date */
-		temp = sqlite3_mprintf("%02i.%02i.%04i", (int)wanted_struct.tm_mday, (int)wanted_struct.tm_mon+1, (int)wanted_struct.tm_year+1900);
-	}
+	temp = sqlite3_mprintf("%02i.%02i.%04i %02i:%02i:%02i",
+		(int)wanted_struct.tm_mday, (int)wanted_struct.tm_mon+1, (int)wanted_struct.tm_year+1900,
+		(int)wanted_struct.tm_hour, (int)wanted_struct.tm_min, (int)wanted_struct.tm_sec);
 
 	char* ret = safe_strdup(temp);
 	sqlite3_free(temp);