From fcb4d926fa7b106a60830992148e06f2ebe02ebc Mon Sep 17 00:00:00 2001
From: Lieuwe Rooijakkers <lieuwerooijakkers@gmail.com>
Date: Sun, 29 Sep 2024 22:04:15 +0200
Subject: toilet: use minimal required padding

---
 Maakbestand  |  2 +-
 src/toilet.c | 78 ++++++++++++++++++++++++++++++++++++++++++++++++++++--------
 2 files changed, 69 insertions(+), 11 deletions(-)

diff --git a/Maakbestand b/Maakbestand
index cf87dd4..d4f3360 100644
--- a/Maakbestand
+++ b/Maakbestand
@@ -11,7 +11,7 @@ else
 endif
 CFLAGS += -D_GNU_SOURCE -DDRUKKEDOOS_VERSIE=\"$(VERSION)\"
 CFLAGS += -Isrc -I.
-LDFLAGS :=
+LDFLAGS := -lm
 
 OBJDIR := obj
 TARGET := drukkedoos
diff --git a/src/toilet.c b/src/toilet.c
index c66896a..6d95427 100644
--- a/src/toilet.c
+++ b/src/toilet.c
@@ -2,6 +2,7 @@
 #include <ctype.h>
 #include <getopt.h>
 #include <limits.h>
+#include <tgmath.h>
 #include <pwd.h>
 #include <stdbool.h>
 #include <stdlib.h>
@@ -19,8 +20,13 @@
 
 static int modeMap;
 
-// lines, words, bytes
-static size_t totals[3] = {0};
+struct finfo {
+  size_t values[3];
+  char *fname;
+};
+static struct finfo *finfo = NULL;
+static size_t finfolen = 0;
+static size_t finfocap = 0;
 
 static void usage(FILE *f) {
   fprintf(f,
@@ -132,16 +138,41 @@ static int mlog2(int val) {
 #undef C
 }
 
+static void init_finfo(int argc) {
+  assert(finfo == NULL);
+  argc += 1; // one more for the total tally
+  if (argc < 8) argc = 8;
+
+  finfo = calloc(argc, sizeof(struct finfo));
+  finfocap = argc;
+}
+
+static struct finfo *add_fname(char *fname) {
+  assert(finfo != NULL);
+
+  if (finfolen == finfocap) {
+    finfocap *= 2;
+    finfo = realloc(finfo, sizeof(struct finfo)*finfocap);
+  }
+
+  struct finfo *ptr = finfo + finfolen;
+  ptr->values[0] = 0;
+  ptr->values[1] = 0;
+  ptr->values[2] = 0;
+  ptr->fname = fname;
+
+  finfolen++;
+  return ptr;
+}
+
 static int process(struct filebuf *fb, char *fname, bool) {
+  struct finfo *finfo = add_fname(fname);
+
   for (enum MODE mode = 1; mode <= M_BYTES; mode <<= 1) {
     if (mode & modeMap) {
-      const size_t count = get_count(mode, fb);
-      printf("% 10li ", count);
-
-      totals[mlog2(mode)] += count;
+      finfo->values[mlog2(mode)] = get_count(mode, fb);
     }
   }
-  printf("%s\n", fname);
   free_filebuf(fb);
   return 0;
 }
@@ -150,6 +181,8 @@ static int process(struct filebuf *fb, char *fname, bool) {
 // unmappable files)
 
 int entry_toilet(int argc, char **argv) {
+  init_finfo(argc);
+
   modeMap = 0;
   char **args = parse_options(argc, argv, &modeMap);
   if (modeMap == 0) {
@@ -158,10 +191,35 @@ int entry_toilet(int argc, char **argv) {
 
   const int res = loop_files(args, process);
 
-  for (size_t i = 0; i < 3; i++) {
-    printf("% 10li ", totals[i]);
+  // tally file totals
+  {
+    struct finfo *ptr = add_fname("total");
+
+    for (size_t i = 0; i < 3; i++) {
+      for (size_t j = 0; j < finfolen; j++) {
+        ptr->values[i] += finfo[j].values[i];
+      }
+    }
   }
-  puts("totaal");
+
+  // calculate required padding
+  int pad[3] = {0};
+  for (size_t i = 0; i < finfolen; i++) {
+    for (size_t j = 0; j < 3; j++) {
+      const int sz = ceill(log10l(finfo[i].values[j])) + 1;
+      if (sz > pad[j]) pad[j] = sz;
+    }
+  }
+
+  // print all results
+  for (size_t i = 0; i < finfolen; i++) {
+    struct finfo *ptr = finfo + i;
+    for (size_t j = 0; j < 3; j++) {
+      printf("% *li ", pad[j], ptr->values[j]);
+    }
+    printf("%s\n", ptr->fname);
+  }
+
 
   return res;
 }
-- 
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