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Moved much of the main.cc code into a new global_scope_t class.

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This commit is contained in:
John Wiegley 2009-02-05 04:06:58 -04:00
parent 37006741d6
commit 0e2a3a9c00
5 changed files with 168 additions and 177 deletions
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311
src/main.cc
View file

@ -44,8 +44,12 @@ namespace {
public:
path script_file;
global_scope_t() {
global_scope_t(char ** envp)
{
TRACE_CTOR(global_scope_t, "");
session_ptr.reset(new LEDGER_SESSION_T);
set_session_context(session_ptr.get());
// Create the report object, which maintains state relating to each
@ -54,21 +58,45 @@ namespace {
// a GUI were calling into Ledger it would have one session object per
// open document, with a separate report_t object for each report it
// generated.
report_stack.push_front(new report_t(*session_ptr.get()));
report_stack.push_front(new report_t(session()));
// Read the user's options, in the following order:
//
// 1. environment variables (LEDGER_<option>)
// 2. initialization file (~/.ledgerrc)
// 3. command-line (--option or -o)
//
// Before processing command-line options, we must notify the session object
// that such options are beginning, since options like -f cause a complete
// override of files found anywhere else.
session().now_at_command_line(false);
read_environment_settings(report(), envp);
session().read_init();
}
~global_scope_t() {
~global_scope_t()
{
TRACE_DTOR(global_scope_t);
// If memory verification is being performed (which can be very slow),
// clean up everything by closing the session and deleting the session
// object, and then shutting down the memory tracing subsystem.
// Otherwise, let it all leak because we're about to exit anyway.
IF_VERIFY() {
set_session_context(NULL);
INFO("Ledger ended (Boost/libstdc++ may still hold memory)");
shutdown_memory_tracing();
} else {
// Don't free anything, just let it all leak.
INFO("Ledger ended");
}
IF_VERIFY() set_session_context(NULL);
}
void read_journal_files()
{
INFO_START(journal, "Read journal file");
std::size_t count = session().read_data(*session().create_journal(),
report().account);
if (count == 0)
throw_(parse_error, "Failed to locate any journal entries; "
"did you specify a valid file with -f?");
INFO_FINISH(journal);
INFO("Found " << count << " entries");
}
char * prompt_string()
@ -97,6 +125,114 @@ namespace {
report_stack.pop_front();
}
void report_error(const std::exception& err)
{
std::cout.flush(); // first display anything that was pending
if (caught_signal == NONE_CAUGHT) {
// Display any pending error context information
string context = error_context();
if (! context.empty())
std::cerr << context << std::endl;
std::cerr << "Error: " << err.what() << std::endl;
} else {
caught_signal = NONE_CAUGHT;
}
}
/**
* @return \c true if a command was actually executed; otherwise, it probably
* just resulted in setting some options.
*/
void execute_command(strings_list args, bool at_repl)
{
// Process the command verb, arguments and options
args = read_command_arguments(report(), args);
if (args.empty())
return;
string_iterator arg = args.begin();
string verb = *arg++;
// Look for a precommand first, which is defined as any defined function
// whose name starts with "ledger_precmd_". The difference between a
// precommand and a regular command is that precommands ignore the journal
// data file completely, nor is the user's init file read.
//
// Here are some examples of pre-commands:
//
// parse STRING ; show how a value expression is parsed
// eval STRING ; simply evaluate a value expression
// format STRING ; show how a format string is parsed
//
// If such a command is found, create the output stream for the result and
// then invoke the command.
function_t command;
bool is_precommand = false;
bind_scope_t bound_scope(*this, report());
if (bool(command = look_for_precommand(bound_scope, verb)))
is_precommand = true;
else if (! bool(command = look_for_command(bound_scope, verb)))
throw_(std::logic_error, "Unrecognized command '" << verb << "'");
// If it is not a pre-command, then parse the user's ledger data at this
// time if not done alreday (i.e., if not at a REPL). Then patch up the
// report options based on the command verb.
if (! is_precommand) {
if (! at_repl)
read_journal_files();
// jww (2009-02-02): This is a complete hack, and a leftover from long,
// long ago. The question is, how best to remove its necessity...
normalize_report_options(report(), verb);
}
// Create the output stream (it might be a file, the console or a PAGER
// subprocess) and invoke the report command. The output stream is closed
// by the caller of this function.
report().output_stream.initialize(report().output_file,
session().pager_path);
// Create an argument scope containing the report command's arguments, and
// then invoke the command. The bound scope causes lookups to happen
// first in the global scope, and then in the report scope.
call_scope_t command_args(bound_scope);
for (string_iterator i = arg; i != args.end(); i++)
command_args.push_back(string_value(*i));
INFO_START(command, "Finished executing command");
command(command_args);
INFO_FINISH(command);
}
int execute_command_wrapper(strings_list args, bool at_repl)
{
int status = 1;
try {
push_report();
execute_command(args, at_repl);
pop_report();
// If we've reached this point, everything succeeded fine. Ledger uses
// exceptions to notify of error conditions, so if you're using gdb,
// just type "catch throw" to find the source point of any error.
status = 0;
}
catch (const std::exception& err) {
pop_report();
report_error(err);
}
return status;
}
value_t push_report_cmd(call_scope_t&) {
// Make a copy at position 2, because the topmost report object has an
// open output stream at this point. We want it to get popped off as
@ -184,120 +320,6 @@ namespace {
return args;
}
void report_error(const std::exception& err)
{
std::cout.flush(); // first display anything that was pending
if (caught_signal == NONE_CAUGHT) {
// Display any pending error context information
string context = error_context();
if (! context.empty())
std::cerr << context << std::endl;
std::cerr << "Error: " << err.what() << std::endl;
} else {
caught_signal = NONE_CAUGHT;
}
}
/**
* @return \c true if a command was actually executed; otherwise, it probably
* just resulted in setting some options.
*/
void execute_command(global_scope_t& global_scope,
strings_list args,
bool at_repl)
{
// Process the command verb, arguments and options
args = read_command_arguments(global_scope.report(), args);
if (args.empty())
return;
string_iterator arg = args.begin();
string verb = *arg++;
// Look for a precommand first, which is defined as any defined function
// whose name starts with "ledger_precmd_". The difference between a
// precommand and a regular command is that precommands ignore the journal
// data file completely, nor is the user's init file read.
//
// Here are some examples of pre-commands:
//
// parse STRING ; show how a value expression is parsed
// eval STRING ; simply evaluate a value expression
// format STRING ; show how a format string is parsed
//
// If such a command is found, create the output stream for the result and
// then invoke the command.
function_t command;
bool is_precommand = false;
bind_scope_t bound_scope(global_scope, global_scope.report());
if (bool(command = look_for_precommand(bound_scope, verb)))
is_precommand = true;
else if (! bool(command = look_for_command(bound_scope, verb)))
throw_(std::logic_error, "Unrecognized command '" << verb << "'");
// If it is not a pre-command, then parse the user's ledger data at this
// time if not done alreday (i.e., if not at a REPL). Then patch up the
// report options based on the command verb.
if (! is_precommand) {
if (! at_repl)
read_journal_files(global_scope.session(),
global_scope.report().account);
// jww (2009-02-02): This is a complete hack, and a leftover from long,
// long ago. The question is, how best to remove its necessity...
normalize_report_options(global_scope.report(), verb);
}
// Create the output stream (it might be a file, the console or a PAGER
// subprocess) and invoke the report command. The output stream is closed
// by the caller of this function.
global_scope.report()
.output_stream.initialize(global_scope.report().output_file,
global_scope.session().pager_path);
// Create an argument scope containing the report command's arguments, and
// then invoke the command. The bound scope causes lookups to happen
// first in the global scope, and then in the report scope.
call_scope_t command_args(bound_scope);
for (string_iterator i = arg; i != args.end(); i++)
command_args.push_back(string_value(*i));
INFO_START(command, "Finished executing command");
command(command_args);
INFO_FINISH(command);
}
int execute_command_wrapper(global_scope_t& global_scope,
strings_list args,
bool at_repl)
{
int status = 1;
try {
global_scope.push_report();
execute_command(global_scope, args, at_repl);
global_scope.pop_report();
// If we've reached this point, everything succeeded fine. Ledger uses
// exceptions to notify of error conditions, so if you're using gdb,
// just type "catch throw" to find the source point of any error.
status = 0;
}
catch (const std::exception& err) {
global_scope.pop_report();
report_error(err);
}
return status;
}
}
int main(int argc, char * argv[], char * envp[])
@ -325,21 +347,9 @@ int main(int argc, char * argv[], char * envp[])
// Create the session object, which maintains nearly all state relating to
// this invocation of Ledger; and register all known journal parsers.
std::auto_ptr<global_scope_t> global_scope(new global_scope_t);
std::auto_ptr<global_scope_t> global_scope(new global_scope_t(envp));
try {
// Read the user's options, in the following order:
//
// 1. environment variables (LEDGER_<option>)
// 2. initialization file (~/.ledgerrc)
// 3. command-line (--option or -o)
//
// Before processing command-line options, we must notify the session object
// that such options are beginning, since options like -f cause a complete
// override of files found anywhere else.
global_scope->session().now_at_command_line(false);
read_environment_settings(global_scope->report(), envp);
global_scope->session().read_init();
global_scope->session().now_at_command_line(true);
// Construct an STL-style argument list from the process command arguments
@ -349,35 +359,36 @@ int main(int argc, char * argv[], char * envp[])
// Look for options and a command verb in the command-line arguments
bind_scope_t bound_scope(*global_scope.get(), global_scope->report());
args = read_command_arguments(bound_scope, args);
if (! global_scope->script_file.empty() &&
exists(global_scope->script_file)) {
// Ledger is being invoked as a script command interpreter
global_scope->read_journal_files();
read_journal_files(global_scope->session(),
global_scope->report().account);
status = 0;
ifstream in(global_scope->script_file);
while (! in.eof()) {
while (status == 0 && ! in.eof()) {
char line[1024];
in.getline(line, 1023);
char * p = skip_ws(line);
if (*p && *p != '#')
execute_command_wrapper(*global_scope, split_arguments(p), true);
status = global_scope->execute_command_wrapper(split_arguments(p),
true);
}
status = 0;
}
else if (! args.empty()) {
// User has invoke a verb at the interactive command-line
status = execute_command_wrapper(*global_scope, args, false);
status = global_scope->execute_command_wrapper(args, false);
}
else {
// Commence the REPL by displaying the current Ledger version
global_scope->session().option_version(global_scope->session());
read_journal_files(global_scope->session(),
global_scope->report().account);
global_scope->read_journal_files();
bool exit_loop = false;
@ -425,14 +436,14 @@ int main(int argc, char * argv[], char * envp[])
if (std::strncmp(p, "quit", 4) == 0)
exit_loop = true;
else
execute_command_wrapper(*global_scope, split_arguments(p), true);
global_scope->execute_command_wrapper(split_arguments(p), true);
}
#ifdef HAVE_LIBEDIT
if (expansion)
std::free(expansion);
std::free(p);
#endif // HAVE_LIBEDIT
#endif
if (exit_loop)
break;
@ -442,7 +453,7 @@ int main(int argc, char * argv[], char * envp[])
}
}
catch (const std::exception& err) {
report_error(err);
global_scope->report_error(err);
}
catch (int _status) {
status = _status; // used for a "quick" exit, and is used only
@ -456,8 +467,8 @@ int main(int argc, char * argv[], char * envp[])
IF_VERIFY() {
global_scope.reset();
shutdown_memory_tracing();
INFO("Ledger ended (Boost/libstdc++ may still hold memory)");
shutdown_memory_tracing();
} else {
// Don't free anything, just let it all leak.
global_scope.release();

4
src/session.cc
View file

@ -194,8 +194,6 @@ std::size_t session_t::read_data(journal_t& journal,
if (data_files.empty())
throw_(parse_error, "No journal file was specified (please use -f)");
TRACE_START(session_parser, 1, "Parsed journal file");
std::size_t entry_count = 0;
if (entry_count == 0) {
@ -247,8 +245,6 @@ std::size_t session_t::read_data(journal_t& journal,
VERIFY(journal.valid());
TRACE_STOP(session_parser, 1);
return entry_count;
}

7
src/textual.cc
View file

@ -95,7 +95,14 @@ std::size_t textual_parser_t::parse(std::istream& in,
session.clean_accounts(); // remove calculated totals
TRACE_STOP(parsing_total, 1);
// These tracers were started in textual.cc
TRACE_FINISH(entry_text, 1);
TRACE_FINISH(entry_details, 1);
TRACE_FINISH(entry_xacts, 1);
TRACE_FINISH(entries, 1);
TRACE_FINISH(instance_parse, 1); // report per-instance timers
TRACE_FINISH(parsing_total, 1);
if (parsing_instance.errors > 0)
throw static_cast<int>(parsing_instance.errors);

22
src/work.cc
View file

@ -133,28 +133,6 @@ function_t look_for_command(scope_t& scope, const string& verb)
return function_t();
}
void read_journal_files(session_t& session, const string& account)
{
INFO_START(journal, "Read journal file");
std::size_t count = session.read_data(*session.create_journal(),
account);
if (count == 0)
throw_(parse_error, "Failed to locate any journal entries; "
"did you specify a valid file with -f?");
INFO_FINISH(journal);
INFO("Found " << count << " entries");
TRACE_FINISH(entry_text, 1);
TRACE_FINISH(entry_details, 1);
TRACE_FINISH(entry_xacts, 1);
TRACE_FINISH(entries, 1);
TRACE_FINISH(session_parser, 1);
TRACE_FINISH(parsing_total, 1);
}
void normalize_report_options(report_t& report, const string& verb)
{
// Patch up some of the reporting options based on what kind of

1
src/work.h
View file

@ -49,7 +49,6 @@ strings_list read_command_arguments(scope_t& scope, strings_list args);
void normalize_session_options(session_t& session);
function_t look_for_precommand(scope_t& scope, const string& verb);
function_t look_for_command(scope_t& scope, const string& verb);
void read_journal_files(session_t& session, const string& account);
void normalize_report_options(report_t& report, const string& verb);
} // namespace ledger