Use new stringjoin() function.

[rsync/rsync.git] / util.c

diff --git a/util.c b/util.c
index e642064..fe81f2a 100644 (file)
--- a/util.c
+++ b/util.c
@@ -197,12 +197,10 @@ static int full_write(int desc, char *ptr, size_t len)
        
        total_written = 0;
        while (len > 0) {
-               int written = write (desc, ptr, len);
+               int written = write(desc, ptr, len);
                if (written < 0)  {
-#ifdef EINTR
                        if (errno == EINTR)
                                continue;
-#endif
                        return written;
                }
                total_written += written;
@@ -231,13 +229,9 @@ static int safe_read(int desc, char *ptr, size_t len)
        if (len == 0)
                return len;
  
-#ifdef EINTR
        do {
                n_chars = read(desc, ptr, len);
        } while (n_chars < 0 && errno == EINTR);
-#else
-       n_chars = read(desc, ptr, len);
-#endif
  
        return n_chars;
 }
@@ -559,12 +553,57 @@ void strlower(char *s)
        }
 }
 
-void *Realloc(void *p, int size)
+/* Join strings p1 & p2 into "dest" with a guaranteed '/' between them.  (If
+ * p1 ends with a '/', no extra '/' is inserted.)  Returns the length of both
+ * strings + 1 (if '/' was inserted), regardless of whether the whole thing
+ * fits into destsize (including the terminating '\0'). */
+size_t pathjoin(char *dest, size_t destsize, const char *p1, const char *p2)
 {
-       if (!p) return (void *)malloc(size);
-       return (void *)realloc(p, size);
+       size_t len = strlcpy(dest, p1, destsize);
+       if (len < destsize - 1) {
+               if (!len || dest[len-1] != '/')
+                       dest[len++] = '/';
+               if (len < destsize - 1)
+                       len += strlcpy(dest + len, p2, destsize - len);
+               else {
+                       dest[len] = '\0';
+                       len += strlen(p2);
+               }
+       }
+       else
+               len += strlen(p2) + 1; /* Assume we'd insert a '/'. */
+       return len;
 }
 
+/* Join any number of strings together, putting them in "dest".  The return
+ * value is the length of all the strings, regardless of whether they fit in
+ * destsize (including the terminating '\0').  Your list of string pointers
+ * should end with a NULL to indicate the end of the list. */
+size_t stringjoin(char *dest, size_t destsize, ...)
+{
+       va_list ap;  
+       size_t len, ret = 0;
+       const char *src;
+
+       va_start(ap, destsize);
+       while (1) {
+               if (!(src = va_arg(ap, const char *)))
+                       break;
+               len = strlen(src);
+               ret += len;
+               if (destsize > 1) {
+                       if (len >= destsize)
+                               len = destsize - 1;
+                       memcpy(dest, src, len);
+                       destsize -= len;
+                       dest += len;
+               }
+       }
+       *dest = '\0';
+       va_end(ap);
+
+       return ret;
+}
 
 void clean_fname(char *name)
 {
@@ -1008,3 +1047,23 @@ int _Insure_trap_error(int a1, int a2, int a3, int a4, int a5, int a6)
        return ret;
 }
 #endif
+
+
+#define MALLOC_MAX 0x40000000
+
+void *_new_array(unsigned int size, unsigned long num)
+{
+       if (num >= MALLOC_MAX/size)
+               return NULL;
+       return malloc(size * num);
+}
+
+void *_realloc_array(void *ptr, unsigned int size, unsigned long num)
+{
+       if (num >= MALLOC_MAX/size)
+               return NULL;
+       /* No realloc should need this, but just in case... */
+       if (!ptr)
+               return malloc(size * num);
+       return realloc(ptr, size * num);
+}