Rewrote calc.c in the new style & framework

ncdu is currently pretty much in a non-working state, but things will
get fixed eventually after porting the other source files to the new
framework.

src/browser.c

@@ -428,12 +428,12 @@ void showBrowser(void) {
         }
         break;
 
-     /* refresh */
+     /* refresh *
       case 'r':
         hideinfo;
         drawBrowser(0);
         if((n = showCalc(getpath(bcur, tmp))) != NULL) {
-         /* free current items */
+         * free current items *
           d = bcur;
           bcur = bcur->parent;
           while(d != NULL) {
@@ -442,7 +442,7 @@ void showBrowser(void) {
             freedir(t);
           }
 
-         /* update parent dir */
+         * update parent dir *
           bcur->sub = n->sub;
           bcur->items = n->items;
           bcur->size = n->size;
@@ -450,7 +450,7 @@ void showBrowser(void) {
           for(t = bcur->sub; t != NULL; t = t->next)
             t->parent = bcur;
 
-         /* update sizes of parent dirs */
+         * update sizes of parent dirs *
           for(t = bcur; (t = t->parent) != NULL; ) {
             t->size += bcur->size;
             t->asize += bcur->asize;
@@ -462,6 +462,7 @@ void showBrowser(void) {
           free(n);
         }
         break;
+        */
 
      /* and other stuff */
       case KEY_RESIZE:

src/calc.c

@@ -26,18 +26,6 @@
 #include "ncdu.h"
 
 
-/* parent dir we are calculating */
-struct dir *parent;
-/* current device we are on */
-dev_t curdev;
-/* path of the last dir we couldn't read */
-char lasterr[PATH_MAX];
-/* and for the animation... */
-int anpos;
-char antext[15] = "Calculating...";
-suseconds_t lastupdate;
-
-
 
 /* My own implementation of realpath()
     - assumes that *every* possible path fits in PATH_MAX bytes
@@ -140,173 +128,52 @@ char *rpath(const char *from, char *to) {
 }
 
 
-/* the progress window */
-static void drawProgress(char *cdir) {
-  char ani[15];
-  int i;
-
-  nccreate(10, 60, dat == NULL ? "Calculating..." : "Recalculating...");
-
-  ncprint(2, 2, "Total items: %-8d size: %s",
-    parent->items, cropsize(parent->size));
-  ncprint(3, 2, "Current dir: %s", cropdir(cdir, 43));
-  ncaddstr(8, 43, "Press q to quit");
-
- /* show warning if we couldn't open a dir */
-  if(lasterr[0] != '\0') {
-     attron(A_BOLD);
-     ncaddstr(5, 2, "Warning:");
-     attroff(A_BOLD);
-     ncprint(5, 11, "could not open %-32s", cropdir(lasterr, 32));
-     ncaddstr(6, 3, "some directory sizes may not be correct");  
-  }
-
- /* animation - but only if the screen refreshes more than or once every second */
-  if(sdelay <= 1000) {
-    if(++anpos == 28) anpos = 0;
-      strcpy(ani, "              ");
-      if(anpos < 14)
-        for(i=0; i<=anpos; i++)
-          ani[i] = antext[i];
-      else
-        for(i=13; i>anpos-14; i--)
-          ani[i] = antext[i];
-  } else
-    strcpy(ani, antext);
-  ncaddstr(8, 3, ani);
-
-  refresh();
-}
-
-
-/* show error if can't open parent dir */
-static void drawError(char *dir) {
-  nccreate(10, 60, "Error!");
-
-  attron(A_BOLD);
-  ncaddstr(5, 2, "Error:");
-  attroff(A_BOLD);
-
-  ncprint(5, 9, "could not open %s", cropdir(dir, 34));
-  ncaddstr(6, 3, "press any key to continue...");
-
-  refresh();
-}
-
-
-/* checks for input and calls drawProgress */
-int updateProgress(char *path) {
-  struct timeval tv;
-  int ch;
-
- /* check for input or screen resizes */
-  nodelay(stdscr, 1);
-  while((ch = getch()) != ERR) {
-    if(ch == 'q')
-      return(0);
-    if(ch == KEY_RESIZE) {
-      ncresize();
-      if(dat != NULL)
-        drawBrowser(0);
-      drawProgress(path);
-    }
-  }
-  nodelay(stdscr, 0);
- 
- /* don't update the screen with shorter intervals than sdelay */
-  gettimeofday(&tv, (void *)NULL);
-  tv.tv_usec = (1000*(tv.tv_sec % 1000) + (tv.tv_usec / 1000)) / sdelay;
-  if(lastupdate != tv.tv_usec) {
-    drawProgress(path);
-    lastupdate = tv.tv_usec;
-  }
-  return(1);
-}
-
-
-/* recursive */
-int calcDir(struct dir *dest, char *path) {
-  struct dir *d, *t, *last;
+int calc_item(struct dir *par, char *path, char *name) {
+  char tmp[PATH_MAX];
+  struct dir *t, *d;
   struct stat fs;
-  DIR *dir;
-  struct dirent *dr;
-  char *f, tmp[PATH_MAX];
-  int len, derr = 0, serr = 0;
-
-  if(!updateProgress(path))
-    return(0);
 
- /* open directory */
-  if((dir = opendir(path)) == NULL) {
-    strcpy(lasterr, path);
-    dest->flags |= FF_ERR;
-    t = dest;
-    while((t = t->parent) != NULL)
-      t->flags |= FF_SERR;
-    return(1);
-  }
-  len = strlen(path);
-
- /* add leading slash */
-  if(path[len-1] != '/') {
-    path[len] = '/';
-    path[++len] = '\0';
-  }
- 
- /* read directory */
-  last = NULL;
-  while((dr = readdir(dir)) != NULL) {
-    f = dr->d_name;
-    if(f[0] == '.' && (f[1] == '\0' || (f[1] == '.' && f[2] == '\0')))
-      continue;
+  if(name[0] == '.' && (name[1] == '\0' || (name[1] == '.' && name[2] == '\0')))
+    return 0;
 
   /* path too long - ignore file */
-    if(len+strlen(f)+1 > PATH_MAX) {
-      derr = 1;
-      errno = 0;
-      continue;
-    }
+  if(strlen(path)+strlen(name)+1 > PATH_MAX)
+    return 1;
 
   /* allocate dir and fix references */
   d = calloc(sizeof(struct dir), 1);
-    d->parent = dest;
-    if(dest->sub == NULL)
-      dest->sub = d;
-    if(last != NULL)
-      last->next = d;
-    last = d;
-
-   /* set d->name */
-    d->name = malloc(strlen(f)+1);
-    strcpy(d->name, f);
+  d->parent = par;
+  if(par->sub == NULL)
+    par->sub = d;
+  else {
+    for(t=par->sub; t->next!=NULL; t=t->next)
+      ;
+    t->next = d;
+  }
+  d->name = malloc(strlen(name)+1);
+  strcpy(d->name, name);
 
 #ifdef __CYGWIN__
   /* /proc/registry names may contain slashes */
   if(strchr(d->name, '/') || strchr(d->name,  '\\')) {
-      serr = 1;
-      errno = 0;
     d->flags |= FF_ERR;
-      continue;
+    return 0;
   }
 #endif
 
-   /* get full path */
-    strcpy(tmp, path);
-    strcat(tmp, f);
-
   /* lstat */
+  strcpy(tmp, path);
+  strcat(tmp, name);
   if(lstat(tmp, &fs)) {
-      serr = 1;
-      errno = 0;
     d->flags |= FF_ERR;
-      continue;
+    return 0;
   }
 
   /* check for excludes and same filesystem */
   if(matchExclude(tmp))
     d->flags |= FF_EXL;
 
-    if(sflags & SF_SMFS && curdev != fs.st_dev)
+  if(sflags & SF_SMFS && pstate.calc.curdev != fs.st_dev)
     d->flags |= FF_OTHFS;
 
   /* determine type of this item */
@@ -317,91 +184,208 @@ int calcDir(struct dir *dest, char *path) {
 
   /* update parent dirs */
   if(!(d->flags & FF_EXL))
-      for(t = dest; t != NULL; t = t->parent)
+    for(t=d; t!=NULL; t=t->parent)
       t->items++;
 
   /* count the size */
   if(!(d->flags & FF_EXL || d->flags & FF_OTHFS)) {
     d->size = fs.st_blocks * S_BLKSIZE;
     d->asize = fs.st_size;
-      for(t = dest; t != NULL; t = t->parent) {
+    for(t=d; t!=NULL; t=t->parent) {
       t->size += d->size;
       t->asize += d->asize;
     }
   }
+  return 0;
+}
 
-   /* show status */
-    if(!updateProgress(tmp))
-      return(0);   
 
+/* recursively walk through the directory tree */
+int calc_dir(struct dir *dest, char *path) {
+  struct dir *t;
+  DIR *dir;
+  struct dirent *dr;
+  char tmp[PATH_MAX];
+  int len;
+
+  if(input_handle(1))
+    return 1;
+
+  /* open directory */
+  if((dir = opendir(path)) == NULL) {
+    strcpy(pstate.calc.lasterr, path);
+    dest->flags |= FF_ERR;
+    t = dest;
+    while((t = t->parent) != NULL)
+      t->flags |= FF_SERR;
+    return 0;
+  }
+
+  /* add leading slash */
+  len = strlen(path);
+  if(path[len-1] != '/') {
+    path[len] = '/';
+    path[++len] = '\0';
+  }
+
+  /* read directory */
+  while((dr = readdir(dir)) != NULL) {
+    if(calc_item(dest, path, dr->d_name))
+      dest->flags |= FF_ERR;
+    if(input_handle(1))
+      return 1;
     errno = 0;
   }
-  derr = derr || errno;
+
+  if(errno) {
+    if(dest->flags & FF_SERR)
+      dest->flags -= FF_SERR;
+    dest->flags |= FF_ERR;
+  }
   closedir(dir);
 
   /* error occured while reading this dir, update parent dirs */
-  if(derr || serr) {
-    dest->flags |= derr ? FF_ERR : FF_SERR;
+  for(t=dest->sub; t!=NULL; t=t->next)
+    if(t->flags & FF_ERR || t->flags & FF_SERR)
+      dest->flags |= FF_SERR;
+  if(dest->flags & FF_ERR || dest->flags & FF_SERR) {
     for(t = dest; (t = t->parent) != NULL; )
       t->flags |= FF_SERR;
   }
 
-  if(dest->sub) {
   /* calculate subdirectories */
-    for(d = dest->sub; d != NULL; d = d->next)
-      if(d->flags & FF_DIR && !(d->flags & FF_EXL || d->flags & FF_OTHFS)) {
+  for(t=dest->sub; t!=NULL; t=t->next)
+    if(t->flags & FF_DIR && !(t->flags & FF_EXL || t->flags & FF_OTHFS)) {
       strcpy(tmp, path);
-        strcat(tmp, d->name);
-        if(!calcDir(d, tmp))
-          return(0);
+      strcat(tmp, t->name);
+      if(calc_dir(t, tmp))
+        return 1;
+    }
+
+  return 0;
 }
+
+
+void calc_draw_progress() {
+  static char antext[15] = "Calculating...";
+  char ani[15];
+  int i;
+
+  nccreate(10, 60, dat == NULL ? "Calculating..." : "Recalculating...");
+
+  ncprint(2, 2, "Total items: %-8d size: %s",
+    pstate.calc.parent->items, cropsize(pstate.calc.parent->size));
+  ncprint(3, 2, "Current dir: %s", cropdir(pstate.calc.cur, 43));
+  ncaddstr(8, 43, "Press q to quit");
+
+  /* show warning if we couldn't open a dir */
+  if(pstate.calc.lasterr[0] != '\0') {
+     attron(A_BOLD);
+     ncaddstr(5, 2, "Warning:");
+     attroff(A_BOLD);
+     ncprint(5, 11, "could not open %-32s", cropdir(pstate.calc.lasterr, 32));
+     ncaddstr(6, 3, "some directory sizes may not be correct");
   }
 
-  return(1);
+  /* animation - but only if the screen refreshes more than or once every second */
+  if(sdelay <= 1000) {
+    if(++pstate.calc.anpos == 28)
+       pstate.calc.anpos = 0;
+    strcpy(ani, "              ");
+    if(pstate.calc.anpos < 14)
+      for(i=0; i<=pstate.calc.anpos; i++)
+        ani[i] = antext[i];
+    else
+      for(i=13; i>pstate.calc.anpos-14; i--)
+        ani[i] = antext[i];
+  } else
+    strcpy(ani, antext);
+  ncaddstr(8, 3, ani);
 }
 
 
-struct dir *showCalc(char *path) {
-  char tmp[PATH_MAX];
-  struct stat fs;
-  struct dir *t;
+void calc_draw_error(char *cur, char *msg) {
+  nccreate(7, 60, "Error!");
 
- /* init/reset global vars */
-  *lasterr = '\0';
-  anpos = 0;
-  lastupdate = 999;
-  memset(tmp, 0, PATH_MAX);
-
- /* init parent dir */
-  if(rpath(path, tmp) == NULL || lstat(tmp, &fs) != 0 || !S_ISDIR(fs.st_mode)) {
-    do {
-      ncresize();
-      if(dat != NULL)
-        drawBrowser(0);
-      drawError(path);
-    } while (getch() == KEY_RESIZE);
-    return(NULL);
+  attron(A_BOLD);
+  ncaddstr(2, 2, "Error:");
+  attroff(A_BOLD);
+
+  ncprint(2, 9, "could not open %s", cropdir(cur, 34));
+  ncprint(3, 4, "%s", cropdir(msg, 52));
+  ncaddstr(5, 30, "press any key to continue...");
 }
-  parent = calloc(sizeof(struct dir), 1);
-  parent->size = fs.st_blocks * S_BLKSIZE;
-  parent->asize = fs.st_size;
-  parent->flags |= FF_DIR;
-  curdev = fs.st_dev;
-  parent->name = malloc(strlen(tmp)+1);
-  strcpy(parent->name, tmp);
 
- /* start calculating */
-  if(!calcDir(parent, tmp)) {
-    freedir(parent);
-    return(NULL);
+
+int calc_draw() {
+  struct timeval tv;
+
+  if(pstate.calc.err) {
+    calc_draw_error(pstate.calc.cur, pstate.calc.errmsg);
+    return 0;
   }
 
-  return(parent);
+  /* should we really draw the screen again? */
+  gettimeofday(&tv, (void *)NULL);
+  tv.tv_usec = (1000*(tv.tv_sec % 1000) + (tv.tv_usec / 1000)) / sdelay;
+  if(pstate.calc.lastupdate != tv.tv_usec) {
+    calc_draw_progress();
+    pstate.calc.lastupdate = tv.tv_usec;
+    return 0;
+  }
+  return 1;
 }
 
 
+int calc_key(int ch) {
+  if(pstate.calc.err)
+    return 1;
+  if(ch == 'q')
+    return 1;
+  return 0;
+}
+
 
+void calc_process() {
+  char tmp[PATH_MAX];
+  struct stat fs;
+  struct dir *t;
 
+  /* init/reset global vars */
+  pstate.calc.err = 0;
+  pstate.calc.lastupdate = 999;
+  pstate.calc.lasterr[0] = 0;
+  pstate.calc.anpos = 0;
+
+  /* check root directory */
+  if(rpath(pstate.calc.cur, tmp) == NULL || lstat(tmp, &fs) != 0 || !S_ISDIR(fs.st_mode)) {
+    pstate.calc.err = 1;
+    strcpy(pstate.calc.errmsg, "Directory not found");
+    goto fail;
+  }
+
+  /* initialize parent dir */
+  t = (struct dir *) calloc(1, sizeof(struct dir));
+  t->size = fs.st_blocks * S_BLKSIZE;
+  t->asize = fs.st_size;
+  t->flags |= FF_DIR;
+  t->name = (char *) malloc(strlen(tmp)+1);
+  strcpy(t->name, tmp);
+  pstate.calc.parent = t;
+  pstate.calc.curdev = fs.st_dev;
 
+  /* start calculating */
+  if(!calc_dir(pstate.calc.parent, tmp) && !pstate.calc.err) {
+    pstate.st = ST_BROWSE;
+    return;
+  }
 
+  /* something went wrong... */
+  freedir(pstate.calc.parent);
+fail:
+  while(pstate.calc.err && !input_handle(0))
+    ;
+  pstate.st = dat != NULL ? ST_BROWSE : ST_QUIT;
+  return;
+}
 

src/main.c

@@ -28,14 +28,44 @@
 /* check ncdu.h what these are for */
 struct dir *dat;
 int winrows, wincols;
+char sdir[PATH_MAX];
 int sflags, bflags, sdelay, bgraph;
 int subwinc, subwinr;
 struct state pstate;
 
 
+void screen_draw() {
+  int n = 1;
+  switch(pstate.st) {
+    case ST_CALC: n = calc_draw();
+  }
+  if(!n)
+    refresh();
+}
+
+
+int input_handle(int wait) {
+  int ch;
+
+  nodelay(stdscr, wait);
+  screen_draw();
+  while((ch = getch()) != ERR) {
+    if(ch == KEY_RESIZE) {
+      ncresize();
+      screen_draw();
+      continue;
+    }
+    switch(pstate.st) {
+      case ST_CALC: return calc_key(ch);
+    }
+  }
+  return 0;
+}
+
+
 /* parse command line */
 void argv_parse(int argc, char **argv, char *dir) {
-  int i, j;
+  int i, j, len;
 
  /* load defaults */
   memset(dir, 0, PATH_MAX);
@@ -63,7 +93,8 @@ void argv_parse(int argc, char **argv, char *dir) {
         continue;
       }
      /* small flags */
-      for(j=1; j < strlen(argv[i]); j++)
+      len = strlen(argv[i]);
+      for(j=1; j<len; j++)
         switch(argv[i][j]) {
           case 'x': sflags |= SF_SMFS; break;
           case 'q': sdelay = 2000;     break;
@@ -85,12 +116,12 @@ void argv_parse(int argc, char **argv, char *dir) {
             exit(1);
         }
     } else {
-      dir[PATH_MAX - 1] = 0;
       strncpy(dir, argv[i], PATH_MAX);
       if(dir[PATH_MAX - 1] != 0) {
         printf("Error: path length exceeds PATH_MAX\n");
         exit(1);
       }
+      dir[PATH_MAX - 1] = 0;
     }
   }
 }
@@ -100,7 +131,8 @@ void argv_parse(int argc, char **argv, char *dir) {
 int main(int argc, char **argv) {
   dat = NULL;
 
-  argv_parse(argc, argv, pstate.calc.root);
+  memset((void *)&pstate, 0, sizeof(struct state));
+  argv_parse(argc, argv, pstate.calc.cur);
   pstate.st = ST_CALC;
 
   initscr();
@@ -110,8 +142,16 @@ int main(int argc, char **argv) {
   keypad(stdscr, TRUE);
   ncresize();
 
+  while(pstate.st != ST_QUIT) {
+    if(pstate.st == ST_CALC)
+      calc_process();
+    /*else
+       wait_for_input() */
+  }
+
+  /*
   if((dat = showCalc(pstate.calc.root)) != NULL)
-    showBrowser();
+    showBrowser();*/
 
   erase();
   refresh();

src/ncdu.h

@@ -121,6 +121,7 @@
 #define ST_BROWSE 1
 #define ST_DEL    2
 #define ST_HELP   3
+#define ST_QUIT   4
 
 
 
@@ -129,7 +130,7 @@
  */
 struct dir {
   struct dir *parent, *next, *sub;
-  unsigned char *name;
+  char *name;
   off_t size, asize;
   unsigned long items;
   unsigned char flags;
@@ -138,7 +139,14 @@ struct dir {
 struct state {
   int st;  /* SC_x */
   struct {
-    char root[PATH_MAX];
+    char err;
+    char cur[PATH_MAX];
+    char lasterr[PATH_MAX];
+    char errmsg[128];
+    struct dir *parent;
+    dev_t curdev;
+    suseconds_t lastupdate;
+    int anpos;
   } calc;
   /* TODO: information structs for the other states */
 };
@@ -166,6 +174,8 @@ extern struct state pstate;
 /*
  *    G L O B A L   F U N C T I O N S
  */
+/* main.c */
+int input_handle(int);
 /* util.c */
 char *cropdir(const char *, int);
 char *cropsize(const off_t);
@@ -176,7 +186,9 @@ void ncprint(int, int, char *, ...);
 struct dir *freedir(struct dir *);
 char *getpath(struct dir *, char *);
 /* calc.c */
-struct dir *showCalc(char *);
+void calc_process(void);
+int  calc_key(int);
+int  calc_draw(void);
 /* browser.c */
 void drawBrowser(int);
 void showBrowser(void);