started the implementation

[visor] / libvisor / src / visor.c

diff --git a/libvisor/src/visor.c b/libvisor/src/visor.c
index c6388af..af79b4a 100644 (file)
--- a/libvisor/src/visor.c
+++ b/libvisor/src/visor.c
@@ -1,2 +1,72 @@
+#include "vilibc.h"
 #include "visor.h"
+#include "vimpl.h"
 
+#define vi_malloc(s)   vi->mm.malloc(s)
+#define vi_free(p)             vi->mm.free(p)
+
+#ifdef HAVE_LIBC
+static const struct vi_alloc stdalloc = { malloc, free, realloc };
+#endif
+
+struct visor *vi_create(struct vi_alloc *mm)
+{
+       struct visor *vi;
+
+#ifdef HAVE_LIBC
+       if(!mm) mm = &stdalloc;
+#else
+       if(!mm) return 0;
+#endif
+
+       if(!(vi = mm->malloc(sizeof *vi))) {
+               return 0;
+       }
+       memset(vi, 0, sizeof *vi);
+       vi->mm = *mm;
+
+       return vi;
+}
+
+void vi_destroy(struct visor *vi)
+{
+       while(vi->buflist) {
+               vi_delete_buf(vi, vi->buflist);
+       }
+       vi_free(vi);
+}
+
+void vi_set_fileops(struct visor *vi, struct vi_fileops *fop)
+{
+       vi->fop = *fop;
+}
+
+struct vi_buffer *vi_new_buf(struct visor *vi, const char *path)
+{
+       struct vi_buffer *nb;
+
+       if(!(nb = vi_malloc(sizeof *nb))) {
+               vi_error(vi, "failed to allocate new buffer\n");
+               return 0;
+       }
+       memset(nb, 0, sizeof *nb);
+
+       if(path) {
+               if(vi_buf_read(nb, path) == -1) {
+                       vi_free(nb);
+                       return 0;
+               }
+       }
+
+       if(vi->buflist) {
+               struct vi_buffer *last = vi->buflist->prev;
+               nb->prev = last;
+               nb->next = vi->buflist;
+               last->next = nb;
+               vi->buflist->prev = nb;
+       } else {
+               nb->next = nb->prev = nb;
+               vi->buflist = nb;
+       }
+       return nb;
+}