From 934e451507e97423741a3e38eb591a095c46726b Mon Sep 17 00:00:00 2001
From: Francois Fleuret <francois@fleuret.org>
Date: Sun, 7 Mar 2010 10:14:56 +0100
Subject: [PATCH] Added an option to set a lower size bound for printing.

---
 dus.1 |  4 ++++
 dus.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++-------------
 2 files changed, 54 insertions(+), 14 deletions(-)

diff --git a/dus.1 b/dus.1
index 4644d4d..d81f3f5 100644
--- a/dus.1
+++ b/dus.1
@@ -42,6 +42,10 @@ otherwise)
 .TP
 \fB-l \fI<lines>\fR
 same as \fB-c\fR but for the number of lines
+.TP
+\fB-m \fI<size min>\fR
+restrict the printing of file and directories to these of size bigger
+than a lower bound
 
 .SH "BUGS"
 
diff --git a/dus.c b/dus.c
index e215207..736b136 100644
--- a/dus.c
+++ b/dus.c
@@ -22,7 +22,7 @@
  *
  */
 
-#define VERSION_NUMBER "1.0alpha"
+#define VERSION_NUMBER "1.1alpha"
 
 #define _BSD_SOURCE
 
@@ -61,6 +61,10 @@ int reverse_sorting = 0; /* 1 means to show the large ones first */
 int show_top = 0; /* 1 means to show the top of the sorted list
                      instead of the bottom */
 
+size_sum_t size_min = -1; /* -1 means no minimum size, otherwise lower
+                              bound on the size to display a
+                              file/dir */
+
 /********************************************************************/
 
 /* malloc with error checking.  */
@@ -135,6 +139,31 @@ size_sum_t file_or_dir_size(const char *name) {
   return result;
 }
 
+size_sum_t atoss(const char *string) {
+  size_sum_t total, partial_total;
+  const char *c;
+  total = 0;
+  partial_total = 0;
+
+  for(c = string; *c; c++) {
+    if(*c >= '0' && *c <= '9') {
+      partial_total = 10 * partial_total + ((int) (*c - '0'));
+    } else if(*c == 'K' || *c == 'k') {
+      total += partial_total * 1024;
+      partial_total = 0;
+    } else if(*c == 'M' || *c == 'm') {
+      total += partial_total * 1024 * 1024;
+      partial_total = 0;
+    } else if(*c == 'G' || *c == 'g') {
+      total += partial_total * 1024 * 1024 * 1024;
+      partial_total = 0;
+    } else {
+      fprintf(stderr, "Syntax error in %s\n", string);
+    }
+  }
+  return total;
+}
+
 /**********************************************************************/
 
 struct file_with_size {
@@ -218,22 +247,22 @@ void raw_print(char *buffer, char *filename,  size_sum_t size) {
 void fancy_print(char *buffer, char *filename, size_sum_t size) {
   if(size < 1024) {
     sprintf(buffer,
-            "% 7d %s\n",
+            "% 7d -- %s\n",
             ((int) size),
             filename);
   } else if(size < 1024 * 1024) {
     sprintf(buffer,
-            "% 6.1fK %s\n",
+            "% 6.1fK -- %s\n",
             ((double) (size))/(1024.0),
             filename);
   } else if(size < 1024 * 1024 * 1024) {
     sprintf(buffer,
-            "% 6.1fM %s\n",
+            "% 6.1fM -- %s\n",
             ((double) (size))/(1024.0 * 1024),
             filename);
   } else {
     sprintf(buffer,
-            "% 6.1fG %s\n",
+            "% 6.1fG -- %s\n",
             ((double) (size))/(1024.0 * 1024.0 * 1024.0),
             filename);
   }
@@ -277,15 +306,17 @@ void print_sorted(struct file_with_size *root, int width, int height) {
   }
 
   for(n = first; n < last; n++) {
-    if(fancy_size_display) {
-      fancy_print(line, nodes[n]->filename, nodes[n]->size);
-    } else {
-      raw_print(line, nodes[n]->filename, nodes[n]->size);
-    }
-    if(width >= 0 && width < BUFFER_SIZE) {
-      line[width] = '\0';
+    if(size_min < 0 || nodes[n]->size >= size_min) {
+      if(fancy_size_display) {
+        fancy_print(line, nodes[n]->filename, nodes[n]->size);
+      } else {
+        raw_print(line, nodes[n]->filename, nodes[n]->size);
+      }
+      if(width >= 0 && width < BUFFER_SIZE) {
+        line[width] = '\0';
+      }
+      printf(line);
     }
-    printf(line);
   }
 
   free(nodes);
@@ -306,6 +337,7 @@ void print_help(FILE *out) {
   fprintf(out, "               not a tty.\n");
   fprintf(out, "   -l <lines>  same as -c for number of lines.\n");
   fprintf(out, "   -h          show this help.\n");
+  fprintf(out, "   -m <size>   size min.\n");
   fprintf(out, "\n");
   fprintf(out, "Report bugs and comments to <francois@fleuret.org>\n");
 }
@@ -321,7 +353,7 @@ int main(int argc, char **argv) {
   setlocale (LC_ALL, "");
 
   while (1) {
-    c = getopt(argc, argv, "dfrtl:c:hdu");
+    c = getopt(argc, argv, "dfrtl:c:m:hdu");
     if (c == -1)
       break;
 
@@ -351,6 +383,10 @@ int main(int argc, char **argv) {
       forced_width = atoi(optarg);
       break;
 
+    case 'm':
+      size_min = atoss(optarg);
+      break;
+
     case 'h':
       print_help(stdout);
       exit(EXIT_SUCCESS);
-- 
2.39.5