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-v2-abi.c b/gdb/gnu-v2-abi.c
index 5389374..68b734c 100644
--- a/gdb/gnu-v2-abi.c
+++ b/gdb/gnu-v2-abi.c
@@ -37,7 +37,7 @@ static enum dtor_kinds
 gnuv2_is_destructor_name (const char *name)
 {
   if ((name[0] == '_' && is_cplus_marker (name[1]) && name[2] == '_')
-      || strncmp (name, "__dt__", 6) == 0)
+      || startswith (name, "__dt__"))
     return complete_object_dtor;
   else
     return 0;
@@ -48,7 +48,7 @@ gnuv2_is_constructor_name (const char *name)
 {
   if ((name[0] == '_' && name[1] == '_'
        && (isdigit (name[2]) || strchr ("Qt", name[2])))
-      || strncmp (name, "__ct__", 6) == 0)
+      || startswith (name, "__ct__"))
     return complete_object_ctor;
   else
     return 0;
@@ -68,7 +68,7 @@ gnuv2_is_vtable_name (const char *name)
 static int
 gnuv2_is_operator_name (const char *name)
 {
-  return strncmp (name, "operator", 8) == 0;
+  return startswith (name, "operator");
 }