1 files changed, 108 insertions, 0 deletions
diff --git a/wsutil/clopts_common.c b/wsutil/clopts_common.c
new file mode 100644
index 0000000..fa17f8e
--- /dev/null
+++ b/wsutil/clopts_common.c
@@ -0,0 +1,108 @@
+/* clopts_common.c
+ * Handle command-line arguments common to various programs
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "config.h"
+
+#include "clopts_common.h"
+
+#include <stdlib.h>
+#include <errno.h>
+
+#include <wsutil/strtoi.h>
+#include <wsutil/cmdarg_err.h>
+
+int
+get_natural_int(const char *string, const char *name)
+{
+    int32_t number;
+
+    if (!ws_strtoi32(string, NULL, &number)) {
+        if (errno == EINVAL) {
+            cmdarg_err("The specified %s \"%s\" isn't a decimal number", name, string);
+            exit(1);
+        }
+        if (number < 0) {
+            cmdarg_err("The specified %s \"%s\" is a negative number", name, string);
+            exit(1);
+        }
+        cmdarg_err("The specified %s \"%s\" is too large (greater than %d)",
+                name, string, number);
+        exit(1);
+    }
+    if (number < 0) {
+        cmdarg_err("The specified %s \"%s\" is a negative number", name, string);
+        exit(1);
+    }
+    return (int)number;
+}
+
+int
+get_positive_int(const char *string, const char *name)
+{
+    int number;
+
+    number = get_natural_int(string, name);
+
+    if (number == 0) {
+        cmdarg_err("The specified %s is zero", name);
+        exit(1);
+    }
+
+    return number;
+}
+
+uint32_t
+get_guint32(const char *string, const char *name)
+{
+    uint32_t number;
+
+    if (!ws_strtou32(string, NULL, &number)) {
+        if (errno == EINVAL) {
+            cmdarg_err("The specified %s \"%s\" isn't a decimal number", name, string);
+            exit(1);
+        }
+        cmdarg_err("The specified %s \"%s\" is too large (greater than %d)",
+                name, string, number);
+        exit(1);
+    }
+    return number;
+}
+
+uint32_t
+get_nonzero_guint32(const char *string, const char *name)
+{
+    uint32_t number;
+
+    number = get_guint32(string, name);
+
+    if (number == 0) {
+        cmdarg_err("The specified %s is zero", name);
+        exit(1);
+    }
+
+    return number;
+}
+
+double
+get_positive_double(const char *string, const char *name)
+{
+    double number = g_ascii_strtod(string, NULL);
+
+    if (errno == EINVAL) {
+        cmdarg_err("The specified %s \"%s\" isn't a floating point number", name, string);
+        exit(1);
+    }
+    if (number < 0.0) {
+        cmdarg_err("The specified %s \"%s\" is a negative number", name, string);
+        exit(1);
+    }
+
+    return number;
+}