X-Git-Url: http://git.marmaro.de/?p=mmh;a=blobdiff_plain;f=sbr%2Futils.c;h=c433e8f0fe72230d74d66a66bb9c5043e43cb9a6;hp=c25e02d40bd293a52f683b33eae4f90cca43dfc1;hb=d2da15ecabb03fb2de72863abdf5f21e52fdf329;hpb=23f854c962a161cc8ed982b23183600df376e818

diff --git a/sbr/utils.c b/sbr/utils.c
index c25e02d..c433e8f 100644
--- a/sbr/utils.c
+++ b/sbr/utils.c
@@ -12,7 +12,11 @@
 #include <h/mh.h>
 #include <h/utils.h>
 #include <stdlib.h>
+#include <errno.h>
 
+/*
+ * Safely call malloc
+ */
 void *
 mh_xmalloc(size_t size)
 {
@@ -28,6 +32,9 @@ mh_xmalloc(size_t size)
     return memory;
 }
 
+/*
+ * Safely call realloc
+ */
 void *
 mh_xrealloc(void *ptr, size_t size)
 {
@@ -42,6 +49,11 @@ mh_xrealloc(void *ptr, size_t size)
 
     return memory;
 }
+
+/*
+ * Return the present working directory, if the current directory does not
+ * exist, or is too long, make / the pwd.
+ */
 char *
 pwd(void)
 {
@@ -63,3 +75,93 @@ pwd(void)
 
     return curwd;
 }
+
+/*
+ * add   -- If "s1" is NULL, this routine just creates a
+ *       -- copy of "s2" into newly malloc'ed memory.
+ *       --
+ *       -- If "s1" is not NULL, then copy the concatenation
+ *       -- of "s1" and "s2" (note the order) into newly
+ *       -- malloc'ed memory.  Then free "s1".
+ */
+char *
+add (char *s2, char *s1)
+{
+    char *cp;
+    size_t len1 = 0, len2 = 0;
+
+    if (s1)
+        len1 = strlen (s1);
+    if (s2)
+        len2 = strlen (s2);
+
+    cp = mh_xmalloc (len1 + len2 + 1);
+
+    /* Copy s1 and free it */
+    if (s1) {
+        memcpy (cp, s1, len1);
+        free (s1);
+    }
+
+    /* Copy s2 */
+    if (s2)
+        memcpy (cp + len1, s2, len2);
+
+    /* Now NULL terminate the string */
+    cp[len1 + len2] = '\0';
+
+    return cp;
+}
+
+/*
+ * create_folder
+ *      Check to see if a folder exists, if not, prompt the user to create
+ *      it.
+ */
+void create_folder(char *folder, int autocreate, void (*done_callback)())
+{
+    struct stat st;
+    extern int errno;
+    char *cp;
+
+    if (stat (folder, &st) == -1) {
+        if (errno != ENOENT)
+            adios (folder, "error on folder");
+        if (autocreate == 0) {
+            /* ask before creating folder */
+            cp = concat ("Create folder \"", folder, "\"? ", NULL);
+            if (!getanswer (cp))
+                done_callback (1);
+            free (cp);
+        } else if (autocreate == -1) {
+            /* do not create, so exit */
+            done_callback (1);
+        }
+        if (!makedir (folder))
+            adios (NULL, "unable to create folder %s", folder);
+    }
+}
+
+/*
+ * num_digits
+ *      Return the number of digits in a nonnegative integer.
+ */
+int
+num_digits (int n)
+{
+    int ndigits = 0;
+
+    /* Sanity check */
+    if (n < 0)
+        adios (NULL, "oops, num_digits called with negative value");
+
+    if (n == 0)
+        return 1;
+
+    while (n) {
+        n /= 10;
+        ndigits++;
+    }
+
+    return ndigits;
+}