w32 patch

--- win_main.c.orig 2015-07-01 19:59:06.227617801 +0300
+++ win_main.c  2015-07-01 21:40:15.831861595 +0300
@@ -11,6 +11,10 @@
 #include <commdlg.h>
 #include <shellapi.h>

+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
 #ifndef WM_MOUSEWHEEL
 #define WM_MOUSEWHEEL 0x020A
 #endif
@@ -654,9 +658,165 @@ void winopen()
    SetCursor(arrowcurs);
 }

+char *get_path_to_marks()
+{
+   char *path = malloc(PATH_MAX);
+   if (path == NULL)
+   {
+       fprintf(stderr, "error: couldn't allocate memory\n");
+       return NULL;
+   }
+   if (!GetEnvironmentVariable("HOMEPATH", path, PATH_MAX))
+   {
+       fprintf(stderr, "error: couldn't get current user's home directory\n");
+   }
+   strcat(path, "\\.mupdf_marks");
+   return path;
+}
+
+char *realpath(char *path) {
+   char *absolute = malloc(_MAX_PATH);
+   if (absolute == NULL)
+   {
+       fprintf(stderr, "error: couldn't allocate memory\n");
+       return NULL;
+   }
+   if (!GetFullPathName(path, absolute, _MAX_PATH, NULL))
+   {
+       fprintf(stderr, "error: GetFullPathName failed\n");
+       return NULL;
+   }
+   return absolute;
+}
+
+void read_marks(pdfapp_t *app, char *filename)
+{
+   FILE *marks_file;
+   char line[LINE_MAX];
+   char *marks_path = get_path_to_marks();
+   if (marks_path == NULL)
+   {
+       return;
+   }
+   if ((marks_file = fopen(marks_path, "r")) != NULL)
+   {
+       while (fgets(line, LINE_MAX, marks_file))
+       {
+           line[strlen(line)-1] = '\0';
+           char *real = realpath(filename);
+           if (real == NULL) {
+               return;
+           }
+           if (!strcmp(line, real))
+           {
+               if (!fgets(line, LINE_MAX, marks_file))
+               {
+                   break;
+               }
+               int pageno;
+               char *tail;
+               char *head = line;
+               for (int i = 0; i < nelem(app->marks); i++)
+               {
+                   if (*head == ' ')
+                   {
+                       head++;
+                   }
+                   else if (*head == 0)
+                   {
+                       break;
+                   }
+                   errno = 0;
+                   pageno = strtol(head, &tail, 10);
+                   if (errno)
+                   {
+                       fprintf(stderr, "error: %s\n", strerror(errno));
+                       break;
+                   }
+                   else
+                   {
+                       app->marks[i] = pageno;
+                   }
+                   head = tail;
+               }
+               break;
+           }
+           free(real);
+           fgets(line, LINE_MAX, marks_file);
+       }
+   }
+   free(marks_path);
+}
+
+void write_marks(pdfapp_t *app)
+{
+   int not_all_zeros = 0;
+   char *marks_path = get_path_to_marks();
+   if (marks_path == NULL)
+   {
+       return;
+   }
+   for (int i = 0; i < nelem(app->marks); i++)
+   {
+       if (app->marks[i] != 0)
+       {
+           not_all_zeros = 1;
+           break;
+       }
+   }
+   if (not_all_zeros)
+   {
+       FILE *marks_file = fopen(marks_path, "r");
+       char temp_name[L_tmpnam_s];
+       if (!tmpnam_s(temp_name, L_tmpnam_s))
+       {
+           FILE *new_marks_file = fopen(temp_name, "a+");
+           char line[LINE_MAX];
+           int found = 0;
+           char *realdocpath = realpath(app->docpath);
+           if (marks_file)
+           {
+               while (fgets(line, LINE_MAX, marks_file))
+               {
+                   fprintf(new_marks_file, "%s", line);
+                   line[strlen(line)-1] = '\0';
+                   if (!found && !strcmp(line, realdocpath))
+                   {
+                       for (int i = 0; i < nelem(app->marks); i++)
+                       {
+                           fprintf(new_marks_file, (i>0?" %d":"%d"), app->marks[i]);
+                       }
+                       fprintf(new_marks_file, "\n");
+                       found = 1;
+                       fgets(line, LINE_MAX, marks_file);
+                   }
+               }
+           }
+           if (!found)
+           {
+               fprintf(new_marks_file, "%s\n", realdocpath);
+               for (int i = 0; i < nelem(app->marks); i++)
+               {
+                   fprintf(new_marks_file, (i>0?" %d":"%d"), app->marks[i]);
+               }
+               fprintf(new_marks_file, "\n");
+           }
+           rename(template, marks_path);
+           free(realdocpath);
+       }
+       else
+       {
+           fprintf(stderr, "error: couldn't create a temporary file\n");
+           return;
+       }
+   }
+   free(marks_path);
+}
+
 static void
 do_close(pdfapp_t *app)
 {
+   write_marks(app);
    fz_context *ctx = app->ctx;
    pdfapp_close(app);
    free(dibinf);
@@ -1280,6 +1440,7 @@ WinMain(HINSTANCE hInstance, HINSTANCE h
        gapp.layout_css = layout_css_buf;
    }

+   read_marks(&gapp, filename);
    if (bps)
        pdfapp_open_progressive(&gapp, filename, 0, bps);
    else