git.mutantstargoat.com Git - visor/blob - libvisor/src/visor.c

   1 #include "vilibc.h"
   2 #include "visor.h"
   3 #include "vimpl.h"
   4
   5 #define vi_malloc(s)    vi->mm.malloc(s)
   6 #define vi_free(p)              vi->mm.free(p)
   7
   8 #ifdef HAVE_LIBC
   9 static const struct vi_alloc stdalloc = { malloc, free, realloc };
  10 #endif
  11
  12 struct visor *vi_create(struct vi_alloc *mm)
  13 {
  14         struct visor *vi;
  15
  16 #ifdef HAVE_LIBC
  17         if(!mm) mm = &stdalloc;
  18 #else
  19         if(!mm) return 0;
  20 #endif
  21
  22         if(!(vi = mm->malloc(sizeof *vi))) {
  23                 return 0;
  24         }
  25         memset(vi, 0, sizeof *vi);
  26         vi->mm = *mm;
  27
  28         return vi;
  29 }
  30
  31 void vi_destroy(struct visor *vi)
  32 {
  33         while(vi->buflist) {
  34                 vi_delete_buf(vi, vi->buflist);
  35         }
  36         vi_free(vi);
  37 }
  38
  39 void vi_set_fileops(struct visor *vi, struct vi_fileops *fop)
  40 {
  41         vi->fop = *fop;
  42 }
  43
  44 struct vi_buffer *vi_new_buf(struct visor *vi, const char *path)
  45 {
  46         struct vi_buffer *nb;
  47
  48         if(!(nb = vi_malloc(sizeof *nb))) {
  49                 vi_error(vi, "failed to allocate new buffer\n");
  50                 return 0;
  51         }
  52         memset(nb, 0, sizeof *nb);
  53
  54         if(path) {
  55                 if(vi_buf_read(nb, path) == -1) {
  56                         vi_free(nb);
  57                         return 0;
  58                 }
  59         }
  60
  61         if(vi->buflist) {
  62                 struct vi_buffer *last = vi->buflist->prev;
  63                 nb->prev = last;
  64                 nb->next = vi->buflist;
  65                 last->next = nb;
  66                 vi->buflist->prev = nb;
  67         } else {
  68                 nb->next = nb->prev = nb;
  69                 vi->buflist = nb;
  70         }
  71         return nb;
  72 }