advent-of-code

commit abd4bb6e8d3f1740d35d41971ea6284c2a292267
parent ded437a4a7e4dc99209d9412a9351bab2107f69a
Author: aabacchus <ben@bvnf.space>
Date:   Tue,  6 Dec 2022 13:46:08 +0000

add while(getline) C template

Diffstat:
A
getline_tmpl.c
 | 
33
+++++++++++++++++++++++++++++++++

1 file changed, 33 insertions(+), 0 deletions(-)
diff --git a/getline_tmpl.c b/getline_tmpl.c
@@ -0,0 +1,33 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int
+main(int argc, char **argv) {
+    char *buf = NULL;
+    size_t buflen = 0;
+    ssize_t n;
+    FILE *f;
+
+    if (argc != 2) {
+        fprintf(stderr, "usage: %s input\n", argv[0]);
+        return 1;
+    }
+
+    f = fopen(argv[1], "r");
+    if (f == NULL) {
+        perror(argv[1]);
+        return 1;
+    }
+
+    while ((n = getline(&buf, &buflen, f)) != -1) {
+        if (buf[n - 1] == '\n') {
+            buf[n - 1] = '\0';
+            n--;
+        }
+    }
+
+    free(buf);
+    fclose(f);
+
+    return 0;
+}