1 files changed, 50 insertions, 0 deletions
diff --git a/libreport/src/lib/xatonum.c b/libreport/src/lib/xatonum.c
new file mode 100644
index 00000000..b6b90a98
--- /dev/null
+++ b/libreport/src/lib/xatonum.c
@@ -0,0 +1,50 @@
+/*
+ * Utility routines.
+ *
+ * Copyright (C) 2003  Manuel Novoa III  <mjn3@codepoet.org>
+ *
+ * Licensed under GPLv2, see file LICENSE in this tarball for details.
+ */
+#include "libreport.h"
+
+unsigned xatou(const char *numstr)
+{
+    unsigned long r;
+    int old_errno;
+    char *e;
+
+    if (*numstr < '0' || *numstr > '9')
+        goto inval;
+
+    old_errno = errno;
+    errno = 0;
+    r = strtoul(numstr, &e, 10);
+    if (errno || numstr == e || *e != '\0' || r > UINT_MAX)
+        goto inval; /* error / no digits / illegal trailing chars */
+    errno = old_errno; /* Ok.  So restore errno. */
+    return r;
+
+inval:
+    error_msg_and_die("invalid number '%s'", numstr);
+}
+
+int xatoi_positive(const char *numstr)
+{
+    unsigned r = xatou(numstr);
+    if (r > (unsigned)INT_MAX)
+        error_msg_and_die("invalid number '%s'", numstr);
+    return r;
+}
+
+int xatoi(const char *numstr)
+{
+    unsigned r;
+
+    if (*numstr != '-')
+        return xatoi_positive(numstr);
+
+    r = xatou(numstr + 1);
+    if (r > (unsigned)INT_MAX + 1)
+        error_msg_and_die("invalid number '%s'", numstr);
+    return - (int)r;
+}