New common function "startswith"

This commit introduces a new inline common function "startswith"
which takes two string arguments and returns nonzero if the first
string starts with the second.  It also updates the 295 places
where this logic was written out longhand to use the new function.

gdb/ChangeLog:

	* common/common-utils.h (startswith): New inline function.
	All places where this logic was used updated to use the above.

1 files changed, 3 insertions, 3 deletions

diff --git a/gdb/gnu-v3-abi.c b/gdb/gnu-v3-abi.c
index 6a96d21..d1ed8fc 100644
--- a/gdb/gnu-v3-abi.c
+++ b/gdb/gnu-v3-abi.c
@@ -39,13 +39,13 @@ static struct gdbarch_data *std_type_info_gdbarch_data;
 static int
 gnuv3_is_vtable_name (const char *name)
 {
-  return strncmp (name, "_ZTV", 4) == 0;
+  return startswith (name, "_ZTV");
 }
 
 static int
 gnuv3_is_operator_name (const char *name)
 {
-  return strncmp (name, "operator", 8) == 0;
+  return startswith (name, "operator");
 }
 
 
@@ -330,7 +330,7 @@ gnuv3_rtti_type (struct value *value,
      should work just as well, and doesn't read target memory.  */
   vtable_symbol_name = MSYMBOL_DEMANGLED_NAME (vtable_symbol);
   if (vtable_symbol_name == NULL
-      || strncmp (vtable_symbol_name, "vtable for ", 11))
+      || !startswith (vtable_symbol_name, "vtable for "))
     {
       warning (_("can't find linker symbol for virtual table for `%s' value"),
 	       TYPE_SAFE_NAME (values_type));