Remove sbr/peekc.c containing unused peekc().

[nmh] / sbr / utils.c

diff --git a/sbr/utils.c b/sbr/utils.c
index 2e61df89e8cddf9c7ac2794b899d9383d748243f..ca809439ea7262c4d58cfec365c67cdeb494be6a 100644 (file)
--- a/sbr/utils.c
+++ b/sbr/utils.c
@@ -179,22 +179,10 @@ addlist (char *list, const char *item)
 int folder_exists(const char *folder)
 {
     struct stat st;
-    int exists = 0;
 
-    if (stat (folder, &st) == -1) {
-        /* The folder either doesn't exist, or we hit an error.  Either way
-         * return a failure.
-         */
-        exists = 0;
-    } else {
-        /* We can see a folder with the right name */
-        exists = 1;
-    }
-
-    return exists;
+    return stat(folder, &st) != -1;
 }
 
-
 /*
  * create_folder
  *      Check to see if a folder exists, if not, prompt the user to create
@@ -358,6 +346,31 @@ nmh_strcasestr (const char *s1, const char *s2) {
 }
 
 
+/* truncpy copies at most size - 1 chars from non-NULL src to non-NULL
+ * dst, and ensures dst is NUL terminated.  If size is zero then it
+ * aborts as dst cannot be NUL terminated.
+ *
+ * It's to be used when truncation is intended and correct, e.g.
+ * reporting a possibly very long external string back to the user.  One
+ * of its advantages over strncpy(3) is it doesn't pad in the common
+ * case of no truncation. */
+void trunccpy(char *dst, const char *src, size_t size)
+{
+    if (!size) {
+        advise(NULL, "trunccpy: zero-length destination: \"%.20s\"",
+            src ? src : "null");
+        abort();
+    }
+
+    if (strnlen(src, size) < size) {
+        strcpy(dst, src);
+    } else {
+        memcpy(dst, src, size - 1);
+        dst[size - 1] = '\0';
+    }
+}
+
+
 /* HasPrefix returns true if non-NULL s starts with non-NULL prefix. */
 bool HasPrefix(const char *s, const char *prefix)
 {
@@ -370,6 +383,18 @@ bool HasPrefix(const char *s, const char *prefix)
 }
 
 
+/* HasSuffix returns true if non-NULL s ends with non-NULL suffix. */
+bool HasSuffix(const char *s, const char *suffix)
+{
+    size_t ls, lsuf;
+
+    ls = strlen(s);
+    lsuf = strlen(suffix);
+
+    return lsuf <= ls && !strcmp(s + ls - lsuf, suffix);
+}
+
+
 /* HasSuffixC returns true if non-NULL string s ends with a c before the
  * terminating NUL. */
 bool HasSuffixC(const char *s, int c)