diff options
| -rw-r--r-- | gdb/utils.c | 39 | ||||
| -rw-r--r-- | gdb/utils.h | 27 |
2 files changed, 66 insertions, 0 deletions
diff --git a/gdb/utils.c b/gdb/utils.c index f18228d..46bfd9a 100644 --- a/gdb/utils.c +++ b/gdb/utils.c @@ -3631,6 +3631,43 @@ copy_bitwise (gdb_byte *dest, ULONGEST dest_offset, } } +#if GDB_SELF_TEST +static void +test_assign_set_return_if_changed () +{ + bool changed; + int a; + + for (bool initial : { false, true }) + { + changed = initial; + a = 1; + assign_set_if_changed (a, 1, changed); + SELF_CHECK (a == 1); + SELF_CHECK (changed == initial); + } + + for (bool initial : { false, true }) + { + changed = initial; + a = 1; + assign_set_if_changed (a, 2, changed); + SELF_CHECK (a == 2); + SELF_CHECK (changed == true); + } + + a = 1; + changed = assign_return_if_changed (a, 1); + SELF_CHECK (a == 1); + SELF_CHECK (changed == false); + + a = 1; + assign_set_if_changed (a, 2, changed); + SELF_CHECK (a == 2); + SELF_CHECK (changed == true); +} +#endif + void _initialize_utils (); void _initialize_utils () @@ -3695,5 +3732,7 @@ When set, debugging messages will be marked with seconds and microseconds."), selftests::register_test ("strncmp_iw_with_mode", strncmp_iw_with_mode_tests); selftests::register_test ("pager", test_pager); + selftests::register_test ("assign_set_return_if_changed", + test_assign_set_return_if_changed); #endif } diff --git a/gdb/utils.h b/gdb/utils.h index 00b123e..3faac20 100644 --- a/gdb/utils.h +++ b/gdb/utils.h @@ -337,4 +337,31 @@ extern void copy_bitwise (gdb_byte *dest, ULONGEST dest_offset, extern int readline_hidden_cols; +/* Assign VAL to LVAL, and set CHANGED to true if the assignment changed + LVAL. */ + +template<typename T> +void +assign_set_if_changed (T &lval, const T &val, bool &changed) +{ + if (lval == val) + return; + + lval = val; + changed = true; +} + +/* Assign VAL to LVAL, and return true if the assignment changed LVAL. */ + +template<typename T> +bool +assign_return_if_changed (T &lval, const T &val) +{ + if (lval == val) + return false; + + lval = val; + return true; +} + #endif /* UTILS_H */ |