From de98360cbf57ae882bd926964305bbc0da6d537e Mon Sep 17 00:00:00 2001
From: Lieuwe Rooijakkers <lieuwerooijakkers@gmail.com>
Date: Mon, 19 Aug 2024 01:48:17 +0200
Subject: toilet: don't use getline

---
 src/toilet.c | 28 ++++++++++++++++++----------
 1 file changed, 18 insertions(+), 10 deletions(-)

(limited to 'src/toilet.c')

diff --git a/src/toilet.c b/src/toilet.c
index 717afa4..ff51ba8 100644
--- a/src/toilet.c
+++ b/src/toilet.c
@@ -21,6 +21,8 @@
 
 static int modeMap;
 
+#define BUF_SIZE 4096
+
 static void usage(FILE *f) {
   fprintf(f,
       "Gebruik: toilet [-nchV] [BESTAND]...\n"
@@ -77,16 +79,23 @@ static char** parse_options(int argc, char **argv, int *modeMap) {
 
 static size_t count_lines(char *fname, FILE *f) {
   size_t nlines = 0;
+  bool last_was_nl = false;
+
+  while (!feof(f)) {
+    static char buf[BUF_SIZE];
+    const size_t n = fread(buf, 1, BUF_SIZE, f);
 
-  {
-    char *line = NULL;
-    size_t linen = 0;
-    while ((errno = 0, getline(&line, &linen, f)) != -1) {
-      nlines++;
+    for (size_t i = 0; i < n; i++) {
+      last_was_nl = false;
+      if (buf[i] == '\n') {
+        nlines++;
+        last_was_nl = true;
+      }
     }
-    free(line);
   }
 
+  if (!last_was_nl) nlines++;
+
   if (errno != 0) {
     printf("toilet: fout bij lezen uit bestand '%s'\n", fname);
     exit(1);
@@ -97,7 +106,6 @@ static size_t count_lines(char *fname, FILE *f) {
 }
 
 static size_t count_words(FILE *f) {
-#define BUF_SIZE 4096
   size_t nwords = 0;
 
   while (!feof(f)) {
@@ -115,8 +123,6 @@ static size_t count_words(FILE *f) {
 
   rewind(f);
   return nwords;
-
-#undef BUF_SIZE
 }
 
 static size_t get_count(enum MODE mode, char *fname, FILE *f) {
@@ -148,7 +154,9 @@ static int process(char *fname, bool isstdin) {
       printf("%li ", count);
     }
   }
-  printf("%s\n", fname);
+
+  if (fname != NULL) printf("%s", fname);
+  putchar('\n');
 
   if (!isstdin) fclose(f);
   return 0;
-- 
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