hacking the spans

[visor] / libvisor / include / visor.h

diff --git a/libvisor/include/visor.h b/libvisor/include/visor.h
index 55dcc48..a9b3ec7 100644 (file)
--- a/libvisor/include/visor.h
+++ b/libvisor/include/visor.h
@@ -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);