X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=visor;a=blobdiff_plain;f=libvisor%2Finclude%2Fvisor.h;h=a9b3ec78f9e3035249d0f892534a3848a3bd057d;hp=2846218eb4368a53fd9015b9a6bcec51379b8ae5;hb=a4536cf08230dba14f221b661abd7804fcc1ebbc;hpb=9f0326a07930f909b44433f5d0e3b556d0b16a51

diff --git a/libvisor/include/visor.h b/libvisor/include/visor.h
index 2846218..a9b3ec7 100644
--- a/libvisor/include/visor.h
+++ b/libvisor/include/visor.h
@@ -1,5 +1,5 @@
 /*
-This file is part of the visor text editor and text editor framework
+visor - lightweight system-independent text editor and framework
 Copyright (C)  2019 John Tsiombikas <nuclear@member.fsf.org>
 
 This program is free software: you can redistribute it and/or modify
@@ -26,8 +26,9 @@ struct visor;
 struct vi_buffer;
 
 struct vi_span {
-	vi_addr beg;
+	vi_addr start;
 	unsigned long size;
+	int src;
 };
 
 enum vi_motdir {
@@ -68,8 +69,14 @@ struct vi_alloc {
 	void *(*realloc)(void*, unsigned long);	/* can be null, will use malloc/free */
 };
 
+/* open flags (same as POSIX O_*) */
+enum { VI_RDONLY, VI_WRONLY, VI_RDWR, VI_CREAT = 0x100 };
+/* seek origin (same as C SEEK_*) */
+enum { VI_SEEK_SET, VI_SEEK_CUR, VI_SEEK_END };
+
+
 struct vi_fileops {
-	vi_file *(*open)(const char *path);
+	vi_file *(*open)(const char *path, unsigned int flags);
 	long (*size)(vi_file *file);
 	void (*close)(vi_file *file);
 	void *(*map)(vi_file *file);
@@ -135,6 +142,10 @@ int vi_buf_read(struct vi_buffer *vb, const char *path);
 int vi_buf_write(struct vi_buffer *vb, const char *path);
 long vi_buf_size(struct vi_buffer *vb);
 
+/* find the span which corresponds to the specified text position */
+struct vi_span *vi_buf_find_span(struct vi_buffer *vb, vi_addr at);
+const char *vi_buf_span_text(struct vi_buffer *vb, struct vi_span *span);
+
 void vi_buf_ins_begin(struct vi_buffer *vb, vi_motion mot);
 void vi_buf_insert(struct vi_buffer *vb, char *s);
 void vi_buf_ins_end(struct vi_buffer *vb);