First commit

include/comment.h

@@ -0,0 +1,24 @@
+#ifndef COMMENT_H
+#define COMMENT_H
+
+#include <string.h>
+#include <time.h>
+
+typedef struct {
+    int reply_id; /* should be 0 if comment is top-level */
+    time_t creation_time;
+    size_t text_length;
+    char *user_sid, *user_displayname;
+} CommentHeader;
+
+typedef struct {
+    int id;
+    CommentHeader *header;
+    char *text;
+} Comment;
+
+/* does not copy strings given by pointers */
+CommentHeader *
+mk_comment_header(int reply_id, time_t creation_time, size_t text_length, char *user_sid, char *user_displayname);
+
+#endif /* COMMENT_H */

include/driver.h

@@ -0,0 +1,15 @@
+#ifndef DRIVER_H
+#define DRIVER_H
+
+#include "comment.h"
+
+typedef struct {
+    /* should return (id > 0) on success, and negative number on error */
+    int (*leave_comment)(void*, CommentHeader*, char*);
+    /* retrieve header information by id */
+    int (*get_header)(void*, CommentHeader*, int);
+    /* retrieve text of comment by id */
+    int (*get_text)(void*, char*, int);
+} Driver;
+
+#endif /* DRIVER_H */

include/drivers/unix_fs/unix_fs_driver.h

@@ -0,0 +1,22 @@
+#ifndef UNIX_FS_DRIVER_H
+#define UNIX_FS_DRIVER_H
+
+#include "driver.h"
+
+#define ID_CTRL_FILE "max_id"
+#define TEXT_FILE_FMT "%s/%d.txt"
+#define HEADER_FILE_FMT "%s/%d.header"
+
+typedef struct {
+    char *path;
+} UnixFsDriverData;
+
+int unix_fs_driver_leave_comment(void *driver_data_ptr, CommentHeader *header, char *text);
+
+int unix_fs_driver_get_header(void *driver_data_ptr, CommentHeader *header, int id);
+
+int unix_fs_driver_get_text(void *driver_data_ptr, char *text, int id);
+
+static const Driver unix_fs_driver = { unix_fs_driver_leave_comment, unix_fs_driver_get_header, unix_fs_driver_get_text };
+
+#endif /* UNIX_FS_DRIVER_H */