diff options
Diffstat (limited to 'src/parser.cpp')
| -rw-r--r-- | src/parser.cpp | 33 |
1 files changed, 29 insertions, 4 deletions
diff --git a/src/parser.cpp b/src/parser.cpp index 67d8b73..4dbec88 100644 --- a/src/parser.cpp +++ b/src/parser.cpp @@ -72,6 +72,10 @@ static gint nest_level = 0; gchar *strings[2] = {NULL, NULL}; gchar escape_char = '\x1B'; +/* + * handles all expected exceptions, converting them to + * State::Error and preparing them for stack frame insertion + */ void Execute::step(const gchar *macro, gint stop_pos) throw (State::Error, ReplaceCmdline) @@ -104,9 +108,12 @@ Execute::step(const gchar *macro, gint stop_pos) } } +/* + * may throw non State::Error exceptions which are not to be + * associated with the macro invocation stack frame + */ void Execute::macro(const gchar *macro, bool locals) - throw (State::Error, ReplaceCmdline) { GotoTable *parent_goto_table = Goto::table; GotoTable macro_goto_table(false); @@ -125,6 +132,7 @@ Execute::macro(const gchar *macro, bool locals) macro_pc = 0; Goto::table = ¯o_goto_table; + /* locals are allocated so that we do not waste call stack space */ if (locals) { parent_locals = QRegisters::locals; QRegisters::locals = new QRegisterTable(false); @@ -132,9 +140,14 @@ Execute::macro(const gchar *macro, bool locals) try { step(macro, strlen(macro)); - if (Goto::skip_label) - throw State::Error("Label \"%s\" not found", + if (Goto::skip_label) { + State::Error error("Label \"%s\" not found", Goto::skip_label); + error.pos = strlen(macro); + String::get_coord(macro, error.pos, + error.line, error.column); + throw error; + } } catch (...) { g_free(Goto::skip_label); Goto::skip_label = NULL; @@ -163,7 +176,6 @@ Execute::macro(const gchar *macro, bool locals) void Execute::file(const gchar *filename, bool locals) - throw (State::Error, ReplaceCmdline) { gchar *macro_str, *p; @@ -212,6 +224,19 @@ State::Error::Error(const gchar *fmt, ...) va_end(ap); } +State::Error::Error(const Error &inst) + : description(g_strdup(inst.description)), + pos(inst.pos), line(inst.line), column(inst.column) +{ + /* shallow copy of the frames */ + frames = g_slist_copy(inst.frames); + + for (GSList *cur = frames; cur; cur = g_slist_next(cur)) { + Frame *frame = (Frame *)cur->data; + cur->data = frame->copy(); + } +} + void State::Error::add_frame(Frame *frame) { |