1 files changed, 120 insertions, 0 deletions
diff --git a/tasklst.c b/tasklst.c
new file mode 100644
index 0000000..84d674e
--- /dev/null
+++ b/tasklst.c
@@ -0,0 +1,120 @@
+/* See LICENSE file for copyright and license details. */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#include "tasklst.h"
+
+static int tasklst_tasks_status(TaskLst tasks, int status);
+
+static int
+tasklst_tasks_status(TaskLst tasks, int status)
+{
+	int i, total;
+	
+	for (i = 0, total = 0; i < TASK_LST_MAX_NUM; ++i) {
+		if (tasks.status[i] == status)
+			++total;
+	}
+
+	return total;
+}
+
+void
+tasklst_init(TaskLst *tasks)
+{
+	int i;
+
+	tasks->expiry = 0;
+
+	for (i = 0; i < TASK_LST_MAX_NUM; ++i) {
+		memset(&tasks->status[i], TASK_VOID, sizeof(int));
+		memset(tasks->tdesc[i], 0, TASK_LST_DESC_MAX_SIZE);
+	}
+}
+
+void
+tasklst_set_expiration(TaskLst *tasks)
+{
+	tasks->expiry = time(NULL) + TASK_LST_EXPIRY;
+}
+
+int
+tasklst_expired(TaskLst tasks)
+{
+	return ((time(NULL) - tasks.expiry) > TASK_LST_EXPIRY) ? 0 : -1;
+}
+
+int
+tasklst_tasks_total(TaskLst tasks)
+{
+	return tasklst_tasks_todo(tasks) + tasklst_tasks_done(tasks);
+}
+
+int
+tasklst_tasks_todo(TaskLst tasks)
+{
+	return tasklst_tasks_status(tasks, TASK_TODO);
+}
+
+int
+tasklst_tasks_done(TaskLst tasks)
+{
+	return tasklst_tasks_status(tasks, TASK_DONE);
+}
+		
+int
+tasklst_read_from_file(TaskLst *tasks, FILE *fp)
+{
+	int i, stat_buf;
+	char *ptr, *endptr;
+	char linebuf[TASK_LST_DESC_MAX_SIZE];
+	
+	fgets(linebuf, sizeof(linebuf), fp);
+	tasks->expiry = strtoul(linebuf, &endptr, 10);
+	if (endptr[0] != '\n')
+		return -1;
+
+	for (i = 0; i < TASK_LST_MAX_NUM && feof(fp) == 0; ++i) {
+		if (fgets(linebuf, sizeof(linebuf), fp) == NULL)
+			break;
+
+		ptr = strtok(linebuf, "\t");
+		if (ptr == NULL)
+			return -1;
+
+		stat_buf = strtol(ptr, &endptr, 10);
+		if (endptr[0] != '\0')
+			return -1;
+
+		if (stat_buf == TASK_VOID)
+			break;
+		else
+			tasks->status[i] = stat_buf;
+
+		ptr = strtok(NULL, "\n");
+		if (ptr == NULL)
+			return -1;
+
+		strncpy(tasks->tdesc[i], ptr, TASK_LST_DESC_MAX_SIZE);
+	}
+
+	return 0;
+}
+
+void
+tasklst_write_to_file(FILE *fp, TaskLst tasks)
+{
+	int i;
+
+	fprintf(fp, "%zu\n", tasks.expiry);
+
+	for (i = 0; i < TASK_LST_MAX_NUM; ++i) {
+		if (tasks.status[i] == TASK_VOID)
+			break;
+
+		fprintf(fp, "%d\t%s\n", tasks.status[i], tasks.tdesc[i]);
+	}
+}