From 2763d17085af7f8fe4fd5f89154b9934e15707f3 Mon Sep 17 00:00:00 2001
From: Lieuwe Rooijakkers <lieuwerooijakkers@gmail.com>
Date: Fri, 2 Aug 2024 23:03:49 +0200
Subject: kat: use read_file.h

---
 src/kat.c | 63 ++++++++++++++++++++++++++++++++++++++++++---------------------
 1 file changed, 42 insertions(+), 21 deletions(-)

diff --git a/src/kat.c b/src/kat.c
index 6ca8d28..aa0249c 100644
--- a/src/kat.c
+++ b/src/kat.c
@@ -3,8 +3,8 @@
 #include <string.h>
 #include <unistd.h>
 
-#include "util/map.h"
 #include "util/versie.h"
+#include "io/read_file.h"
 
 static void usage(FILE *f) {
   fprintf(f,
@@ -39,33 +39,54 @@ static char** parse_options(int argc, char **argv) {
   return argv + optind;
 }
 
-static void process(const char *fname) {
-  bool isdir;
-
-  struct map *map = open_map(fname, &isdir);
-  if (isdir) {
-    fprintf(stderr, "kat: %s: is een mapje\n", fname);
-    return;
-  } else if (map == NULL) {
-    exit(1);
-  }
-
-  fwrite(map->addr, 1, map->sb.st_size, stdout);
-
-  close_map(map);
+static void process(struct filebuf *fb) {
+  fwrite(fb->buf, 1, fb->sz, stdout);
+  free_filebuf(fb);
 }
 
+// TODO: be smarter, kat doesn't have to read the whole file in memory (for
+// unmappable files)
+
 int entry_kat(int argc, char **argv) {
   char **args = parse_options(argc, argv);
+
   if (*args == NULL) {
-    fprintf(stderr, "kat: Standaard invoer niet ondersteund in deze projectie-gebaseerde implementatie\n");
-    return 1;
-  } else {
-    while (*args != NULL) {
-      process(*args);
-      args++;
+    struct filebuf *fb = stream_to_filebuf(stdin, 0);
+    if (fb == NULL) goto err_stdin;
+
+    process(fb);
+    return 0;
+  }
+
+  while (*args != NULL) {
+    struct filebuf *fb = NULL;
+
+    if (!strcmp(*args, "-")) {
+      fb = stream_to_filebuf(stdin, 0);
+      if (fb == NULL) goto err_stdin;
+    } else {
+      bool isdir = false;
+      fb = file_to_filebuf(*args, 0, &isdir);
+      if (isdir) goto err_isdir;
+      else if (fb == NULL) goto err_file;
     }
+
+    process(fb);
+
+    args++;
   }
 
   return 0;
+
+err_stdin:
+  fprintf(stderr, "kat: fout bij lezen van standaard invoer\n");
+  return 1;
+
+err_file:
+  fprintf(stderr, "kat: fout bij lezen van bestand\n");
+  return 1;
+
+err_isdir:
+  fprintf(stderr, "kat: bestand '%s' is een mapje\n", *args);
+  return 1;
 }
-- 
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