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authorEliseo Martínez <eliseomarmol@gmail.com>2014-05-12 02:25:17 +0200
committerEliseo Martínez <eliseomarmol@gmail.com>2014-05-15 20:46:01 +0200
commitda51dc9cf202772f60bd2da975dbef257bd9237c (patch)
tree5c16b93238a153f55634e9323077f30c8133970c /src/ex_eval.c
parentffe61e5ba1721340ca51d56bae3ddaca415fb5bc (diff)
downloadrneovim-da51dc9cf202772f60bd2da975dbef257bd9237c.tar.gz
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Introduce nvim namespace: Move files.
Move files from src/ to src/nvim/. - src/nvim/ becomes the new root dir for nvim executable sources. - src/libnvim/ is planned to become root dir of the neovim library.
Diffstat (limited to 'src/ex_eval.c')
-rw-r--r--src/ex_eval.c2073
1 files changed, 0 insertions, 2073 deletions
diff --git a/src/ex_eval.c b/src/ex_eval.c
deleted file mode 100644
index fc0887ca03..0000000000
--- a/src/ex_eval.c
+++ /dev/null
@@ -1,2073 +0,0 @@
-/*
- * VIM - Vi IMproved by Bram Moolenaar
- *
- * Do ":help uganda" in Vim to read copying and usage conditions.
- * Do ":help credits" in Vim to see a list of people who contributed.
- * See README.txt for an overview of the Vim source code.
- */
-
-/*
- * ex_eval.c: functions for Ex command line for the +eval feature.
- */
-
-#include "vim.h"
-#include "ex_eval.h"
-#include "charset.h"
-#include "eval.h"
-#include "ex_cmds2.h"
-#include "ex_docmd.h"
-#include "message.h"
-#include "misc2.h"
-#include "memory.h"
-#include "regexp.h"
-
-
-static void free_msglist(struct msglist *l);
-static int throw_exception(void *, int, char_u *);
-static char_u *get_end_emsg(struct condstack *cstack);
-
-/*
- * Exception handling terms:
- *
- * :try ":try" command \
- * ... try block |
- * :catch RE ":catch" command |
- * ... catch clause |- try conditional
- * :finally ":finally" command |
- * ... finally clause |
- * :endtry ":endtry" command /
- *
- * The try conditional may have any number of catch clauses and at most one
- * finally clause. A ":throw" command can be inside the try block, a catch
- * clause, the finally clause, or in a function called or script sourced from
- * there or even outside the try conditional. Try conditionals may be nested.
- */
-
-/*
- * Configuration whether an exception is thrown on error or interrupt. When
- * the preprocessor macros below evaluate to FALSE, an error (did_emsg) or
- * interrupt (got_int) under an active try conditional terminates the script
- * after the non-active finally clauses of all active try conditionals have been
- * executed. Otherwise, errors and/or interrupts are converted into catchable
- * exceptions (did_throw additionally set), which terminate the script only if
- * not caught. For user exceptions, only did_throw is set. (Note: got_int can
- * be set asynchronously afterwards by a SIGINT, so did_throw && got_int is not
- * a reliant test that the exception currently being thrown is an interrupt
- * exception. Similarly, did_emsg can be set afterwards on an error in an
- * (unskipped) conditional command inside an inactive conditional, so did_throw
- * && did_emsg is not a reliant test that the exception currently being thrown
- * is an error exception.) - The macros can be defined as expressions checking
- * for a variable that is allowed to be changed during execution of a script.
- */
-/* Values used for the Vim release. */
-# define THROW_ON_ERROR TRUE
-# define THROW_ON_ERROR_TRUE
-# define THROW_ON_INTERRUPT TRUE
-# define THROW_ON_INTERRUPT_TRUE
-
-static void catch_exception(except_T *excp);
-static void finish_exception(except_T *excp);
-static void discard_exception(except_T *excp, int was_finished);
-static void report_pending(int action, int pending, void *value);
-
-/*
- * When several errors appear in a row, setting "force_abort" is delayed until
- * the failing command returned. "cause_abort" is set to TRUE meanwhile, in
- * order to indicate that situation. This is useful when "force_abort" was set
- * during execution of a function call from an expression: the aborting of the
- * expression evaluation is done without producing any error messages, but all
- * error messages on parsing errors during the expression evaluation are given
- * (even if a try conditional is active).
- */
-static int cause_abort = FALSE;
-
-/*
- * Return TRUE when immediately aborting on error, or when an interrupt
- * occurred or an exception was thrown but not caught. Use for ":{range}call"
- * to check whether an aborted function that does not handle a range itself
- * should be called again for the next line in the range. Also used for
- * cancelling expression evaluation after a function call caused an immediate
- * abort. Note that the first emsg() call temporarily resets "force_abort"
- * until the throw point for error messages has been reached. That is, during
- * cancellation of an expression evaluation after an aborting function call or
- * due to a parsing error, aborting() always returns the same value.
- */
-int aborting(void)
-{
- return (did_emsg && force_abort) || got_int || did_throw;
-}
-
-/*
- * The value of "force_abort" is temporarily reset by the first emsg() call
- * during an expression evaluation, and "cause_abort" is used instead. It might
- * be necessary to restore "force_abort" even before the throw point for the
- * error message has been reached. update_force_abort() should be called then.
- */
-void update_force_abort(void)
-{
- if (cause_abort)
- force_abort = TRUE;
-}
-
-/*
- * Return TRUE if a command with a subcommand resulting in "retcode" should
- * abort the script processing. Can be used to suppress an autocommand after
- * execution of a failing subcommand as long as the error message has not been
- * displayed and actually caused the abortion.
- */
-int should_abort(int retcode)
-{
- return (retcode == FAIL && trylevel != 0 && !emsg_silent) || aborting();
-}
-
-/*
- * Return TRUE if a function with the "abort" flag should not be considered
- * ended on an error. This means that parsing commands is continued in order
- * to find finally clauses to be executed, and that some errors in skipped
- * commands are still reported.
- */
-int aborted_in_try(void)
-{
- /* This function is only called after an error. In this case, "force_abort"
- * determines whether searching for finally clauses is necessary. */
- return force_abort;
-}
-
-/*
- * cause_errthrow(): Cause a throw of an error exception if appropriate.
- * Return TRUE if the error message should not be displayed by emsg().
- * Sets "ignore", if the emsg() call should be ignored completely.
- *
- * When several messages appear in the same command, the first is usually the
- * most specific one and used as the exception value. The "severe" flag can be
- * set to TRUE, if a later but severer message should be used instead.
- */
-int cause_errthrow(char_u *mesg, int severe, int *ignore)
-{
- struct msglist *elem;
- struct msglist **plist;
-
- /*
- * Do nothing when displaying the interrupt message or reporting an
- * uncaught exception (which has already been discarded then) at the top
- * level. Also when no exception can be thrown. The message will be
- * displayed by emsg().
- */
- if (suppress_errthrow)
- return FALSE;
-
- /*
- * If emsg() has not been called previously, temporarily reset
- * "force_abort" until the throw point for error messages has been
- * reached. This ensures that aborting() returns the same value for all
- * errors that appear in the same command. This means particularly that
- * for parsing errors during expression evaluation emsg() will be called
- * multiply, even when the expression is evaluated from a finally clause
- * that was activated due to an aborting error, interrupt, or exception.
- */
- if (!did_emsg) {
- cause_abort = force_abort;
- force_abort = FALSE;
- }
-
- /*
- * If no try conditional is active and no exception is being thrown and
- * there has not been an error in a try conditional or a throw so far, do
- * nothing (for compatibility of non-EH scripts). The message will then
- * be displayed by emsg(). When ":silent!" was used and we are not
- * currently throwing an exception, do nothing. The message text will
- * then be stored to v:errmsg by emsg() without displaying it.
- */
- if (((trylevel == 0 && !cause_abort) || emsg_silent) && !did_throw)
- return FALSE;
-
- /*
- * Ignore an interrupt message when inside a try conditional or when an
- * exception is being thrown or when an error in a try conditional or
- * throw has been detected previously. This is important in order that an
- * interrupt exception is catchable by the innermost try conditional and
- * not replaced by an interrupt message error exception.
- */
- if (mesg == (char_u *)_(e_interr)) {
- *ignore = TRUE;
- return TRUE;
- }
-
- /*
- * Ensure that all commands in nested function calls and sourced files
- * are aborted immediately.
- */
- cause_abort = TRUE;
-
- /*
- * When an exception is being thrown, some commands (like conditionals) are
- * not skipped. Errors in those commands may affect what of the subsequent
- * commands are regarded part of catch and finally clauses. Catching the
- * exception would then cause execution of commands not intended by the
- * user, who wouldn't even get aware of the problem. Therefor, discard the
- * exception currently being thrown to prevent it from being caught. Just
- * execute finally clauses and terminate.
- */
- if (did_throw) {
- /* When discarding an interrupt exception, reset got_int to prevent the
- * same interrupt being converted to an exception again and discarding
- * the error exception we are about to throw here. */
- if (current_exception->type == ET_INTERRUPT)
- got_int = FALSE;
- discard_current_exception();
- }
-
-#ifdef THROW_TEST
- if (!THROW_ON_ERROR) {
- /*
- * Print error message immediately without searching for a matching
- * catch clause; just finally clauses are executed before the script
- * is terminated.
- */
- return FALSE;
- } else
-#endif
- {
- /*
- * Prepare the throw of an error exception, so that everything will
- * be aborted (except for executing finally clauses), until the error
- * exception is caught; if still uncaught at the top level, the error
- * message will be displayed and the script processing terminated
- * then. - This function has no access to the conditional stack.
- * Thus, the actual throw is made after the failing command has
- * returned. - Throw only the first of several errors in a row, except
- * a severe error is following.
- */
- if (msg_list != NULL) {
- plist = msg_list;
- while (*plist != NULL)
- plist = &(*plist)->next;
-
- elem = (struct msglist *)alloc((unsigned)sizeof(struct msglist));
- if (elem == NULL) {
- suppress_errthrow = TRUE;
- EMSG(_(e_outofmem));
- } else {
- elem->msg = vim_strsave(mesg);
- if (elem->msg == NULL) {
- free(elem);
- suppress_errthrow = TRUE;
- EMSG(_(e_outofmem));
- } else {
- elem->next = NULL;
- elem->throw_msg = NULL;
- *plist = elem;
- if (plist == msg_list || severe) {
- char_u *tmsg;
-
- /* Skip the extra "Vim " prefix for message "E458". */
- tmsg = elem->msg;
- if (STRNCMP(tmsg, "Vim E", 5) == 0
- && VIM_ISDIGIT(tmsg[5])
- && VIM_ISDIGIT(tmsg[6])
- && VIM_ISDIGIT(tmsg[7])
- && tmsg[8] == ':'
- && tmsg[9] == ' ')
- (*msg_list)->throw_msg = &tmsg[4];
- else
- (*msg_list)->throw_msg = tmsg;
- }
- }
- }
- }
- return TRUE;
- }
-}
-
-/*
- * Free a "msg_list" and the messages it contains.
- */
-static void free_msglist(struct msglist *l)
-{
- struct msglist *messages, *next;
-
- messages = l;
- while (messages != NULL) {
- next = messages->next;
- free(messages->msg);
- free(messages);
- messages = next;
- }
-}
-
-/*
- * Free global "*msg_list" and the messages it contains, then set "*msg_list"
- * to NULL.
- */
-void free_global_msglist(void)
-{
- free_msglist(*msg_list);
- *msg_list = NULL;
-}
-
-/*
- * Throw the message specified in the call to cause_errthrow() above as an
- * error exception. If cstack is NULL, postpone the throw until do_cmdline()
- * has returned (see do_one_cmd()).
- */
-void do_errthrow(struct condstack *cstack, char_u *cmdname)
-{
- /*
- * Ensure that all commands in nested function calls and sourced files
- * are aborted immediately.
- */
- if (cause_abort) {
- cause_abort = FALSE;
- force_abort = TRUE;
- }
-
- /* If no exception is to be thrown or the conversion should be done after
- * returning to a previous invocation of do_one_cmd(), do nothing. */
- if (msg_list == NULL || *msg_list == NULL)
- return;
-
- if (throw_exception(*msg_list, ET_ERROR, cmdname) == FAIL)
- free_msglist(*msg_list);
- else {
- if (cstack != NULL)
- do_throw(cstack);
- else
- need_rethrow = TRUE;
- }
- *msg_list = NULL;
-}
-
-/*
- * do_intthrow(): Replace the current exception by an interrupt or interrupt
- * exception if appropriate. Return TRUE if the current exception is discarded,
- * FALSE otherwise.
- */
-int do_intthrow(struct condstack *cstack)
-{
- /*
- * If no interrupt occurred or no try conditional is active and no exception
- * is being thrown, do nothing (for compatibility of non-EH scripts).
- */
- if (!got_int || (trylevel == 0 && !did_throw))
- return FALSE;
-
-#ifdef THROW_TEST /* avoid warning for condition always true */
- if (!THROW_ON_INTERRUPT) {
- /*
- * The interrupt aborts everything except for executing finally clauses.
- * Discard any user or error or interrupt exception currently being
- * thrown.
- */
- if (did_throw)
- discard_current_exception();
- } else
-#endif
- {
- /*
- * Throw an interrupt exception, so that everything will be aborted
- * (except for executing finally clauses), until the interrupt exception
- * is caught; if still uncaught at the top level, the script processing
- * will be terminated then. - If an interrupt exception is already
- * being thrown, do nothing.
- *
- */
- if (did_throw) {
- if (current_exception->type == ET_INTERRUPT)
- return FALSE;
-
- /* An interrupt exception replaces any user or error exception. */
- discard_current_exception();
- }
- if (throw_exception("Vim:Interrupt", ET_INTERRUPT, NULL) != FAIL)
- do_throw(cstack);
- }
-
- return TRUE;
-}
-
-/*
- * Get an exception message that is to be stored in current_exception->value.
- */
-char_u *get_exception_string(void *value, int type, char_u *cmdname, int *should_free)
-{
- char_u *ret, *mesg;
- int cmdlen;
- char_u *p, *val;
-
- if (type == ET_ERROR) {
- *should_free = FALSE;
- mesg = ((struct msglist *)value)->throw_msg;
- if (cmdname != NULL && *cmdname != NUL) {
- cmdlen = (int)STRLEN(cmdname);
- ret = vim_strnsave((char_u *)"Vim(",
- 4 + cmdlen + 2 + (int)STRLEN(mesg));
- if (ret == NULL)
- return ret;
- STRCPY(&ret[4], cmdname);
- STRCPY(&ret[4 + cmdlen], "):");
- val = ret + 4 + cmdlen + 2;
- } else {
- ret = vim_strnsave((char_u *)"Vim:", 4 + (int)STRLEN(mesg));
- if (ret == NULL)
- return ret;
- val = ret + 4;
- }
-
- /* msg_add_fname may have been used to prefix the message with a file
- * name in quotes. In the exception value, put the file name in
- * parentheses and move it to the end. */
- for (p = mesg;; p++) {
- if (*p == NUL
- || (*p == 'E'
- && VIM_ISDIGIT(p[1])
- && (p[2] == ':'
- || (VIM_ISDIGIT(p[2])
- && (p[3] == ':'
- || (VIM_ISDIGIT(p[3])
- && p[4] == ':')))))) {
- if (*p == NUL || p == mesg)
- STRCAT(val, mesg); /* 'E123' missing or at beginning */
- else {
- /* '"filename" E123: message text' */
- if (mesg[0] != '"' || p-2 < &mesg[1] ||
- p[-2] != '"' || p[-1] != ' ')
- /* "E123:" is part of the file name. */
- continue;
-
- STRCAT(val, p);
- p[-2] = NUL;
- sprintf((char *)(val + STRLEN(p)), " (%s)", &mesg[1]);
- p[-2] = '"';
- }
- break;
- }
- }
- } else {
- *should_free = FALSE;
- ret = (char_u *) value;
- }
-
- return ret;
-}
-
-
-/*
- * Throw a new exception. Return FAIL when out of memory or it was tried to
- * throw an illegal user exception. "value" is the exception string for a
- * user or interrupt exception, or points to a message list in case of an
- * error exception.
- */
-static int throw_exception(void *value, int type, char_u *cmdname)
-{
- except_T *excp;
- int should_free;
-
- /*
- * Disallow faking Interrupt or error exceptions as user exceptions. They
- * would be treated differently from real interrupt or error exceptions
- * when no active try block is found, see do_cmdline().
- */
- if (type == ET_USER) {
- if (STRNCMP((char_u *)value, "Vim", 3) == 0
- && (((char_u *)value)[3] == NUL || ((char_u *)value)[3] == ':'
- || ((char_u *)value)[3] == '(')) {
- EMSG(_("E608: Cannot :throw exceptions with 'Vim' prefix"));
- goto fail;
- }
- }
-
- excp = (except_T *)alloc((unsigned)sizeof(except_T));
- if (excp == NULL)
- goto nomem;
-
- if (type == ET_ERROR)
- /* Store the original message and prefix the exception value with
- * "Vim:" or, if a command name is given, "Vim(cmdname):". */
- excp->messages = (struct msglist *)value;
-
- excp->value = get_exception_string(value, type, cmdname, &should_free);
- if (excp->value == NULL && should_free)
- goto nomem;
-
- excp->type = type;
- excp->throw_name = vim_strsave(sourcing_name == NULL
- ? (char_u *)"" : sourcing_name);
- if (excp->throw_name == NULL) {
- if (should_free)
- free(excp->value);
- goto nomem;
- }
- excp->throw_lnum = sourcing_lnum;
-
- if (p_verbose >= 13 || debug_break_level > 0) {
- int save_msg_silent = msg_silent;
-
- if (debug_break_level > 0)
- msg_silent = FALSE; /* display messages */
- else
- verbose_enter();
- ++no_wait_return;
- if (debug_break_level > 0 || *p_vfile == NUL)
- msg_scroll = TRUE; /* always scroll up, don't overwrite */
-
- smsg((char_u *)_("Exception thrown: %s"), excp->value);
- msg_puts((char_u *)"\n"); /* don't overwrite this either */
-
- if (debug_break_level > 0 || *p_vfile == NUL)
- cmdline_row = msg_row;
- --no_wait_return;
- if (debug_break_level > 0)
- msg_silent = save_msg_silent;
- else
- verbose_leave();
- }
-
- current_exception = excp;
- return OK;
-
-nomem:
- free(excp);
- suppress_errthrow = TRUE;
- EMSG(_(e_outofmem));
-fail:
- current_exception = NULL;
- return FAIL;
-}
-
-/*
- * Discard an exception. "was_finished" is set when the exception has been
- * caught and the catch clause has been ended normally.
- */
-static void discard_exception(except_T *excp, int was_finished)
-{
- char_u *saved_IObuff;
-
- if (excp == NULL) {
- EMSG(_(e_internal));
- return;
- }
-
- if (p_verbose >= 13 || debug_break_level > 0) {
- int save_msg_silent = msg_silent;
-
- saved_IObuff = vim_strsave(IObuff);
- if (debug_break_level > 0)
- msg_silent = FALSE; /* display messages */
- else
- verbose_enter();
- ++no_wait_return;
- if (debug_break_level > 0 || *p_vfile == NUL)
- msg_scroll = TRUE; /* always scroll up, don't overwrite */
- smsg(was_finished
- ? (char_u *)_("Exception finished: %s")
- : (char_u *)_("Exception discarded: %s"),
- excp->value);
- msg_puts((char_u *)"\n"); /* don't overwrite this either */
- if (debug_break_level > 0 || *p_vfile == NUL)
- cmdline_row = msg_row;
- --no_wait_return;
- if (debug_break_level > 0)
- msg_silent = save_msg_silent;
- else
- verbose_leave();
- STRCPY(IObuff, saved_IObuff);
- free(saved_IObuff);
- }
- if (excp->type != ET_INTERRUPT)
- free(excp->value);
- if (excp->type == ET_ERROR)
- free_msglist(excp->messages);
- free(excp->throw_name);
- free(excp);
-}
-
-/*
- * Discard the exception currently being thrown.
- */
-void discard_current_exception(void)
-{
- discard_exception(current_exception, FALSE);
- current_exception = NULL;
- did_throw = FALSE;
- need_rethrow = FALSE;
-}
-
-/*
- * Put an exception on the caught stack.
- */
-static void catch_exception(except_T *excp)
-{
- excp->caught = caught_stack;
- caught_stack = excp;
- set_vim_var_string(VV_EXCEPTION, excp->value, -1);
- if (*excp->throw_name != NUL) {
- if (excp->throw_lnum != 0)
- vim_snprintf((char *)IObuff, IOSIZE, _("%s, line %" PRId64),
- excp->throw_name, (int64_t)excp->throw_lnum);
- else
- vim_snprintf((char *)IObuff, IOSIZE, "%s", excp->throw_name);
- set_vim_var_string(VV_THROWPOINT, IObuff, -1);
- } else
- /* throw_name not set on an exception from a command that was typed. */
- set_vim_var_string(VV_THROWPOINT, NULL, -1);
-
- if (p_verbose >= 13 || debug_break_level > 0) {
- int save_msg_silent = msg_silent;
-
- if (debug_break_level > 0)
- msg_silent = FALSE; /* display messages */
- else
- verbose_enter();
- ++no_wait_return;
- if (debug_break_level > 0 || *p_vfile == NUL)
- msg_scroll = TRUE; /* always scroll up, don't overwrite */
-
- smsg((char_u *)_("Exception caught: %s"), excp->value);
- msg_puts((char_u *)"\n"); /* don't overwrite this either */
-
- if (debug_break_level > 0 || *p_vfile == NUL)
- cmdline_row = msg_row;
- --no_wait_return;
- if (debug_break_level > 0)
- msg_silent = save_msg_silent;
- else
- verbose_leave();
- }
-}
-
-/*
- * Remove an exception from the caught stack.
- */
-static void finish_exception(except_T *excp)
-{
- if (excp != caught_stack)
- EMSG(_(e_internal));
- caught_stack = caught_stack->caught;
- if (caught_stack != NULL) {
- set_vim_var_string(VV_EXCEPTION, caught_stack->value, -1);
- if (*caught_stack->throw_name != NUL) {
- if (caught_stack->throw_lnum != 0)
- vim_snprintf((char *)IObuff, IOSIZE,
- _("%s, line %" PRId64), caught_stack->throw_name,
- (int64_t)caught_stack->throw_lnum);
- else
- vim_snprintf((char *)IObuff, IOSIZE, "%s",
- caught_stack->throw_name);
- set_vim_var_string(VV_THROWPOINT, IObuff, -1);
- } else
- /* throw_name not set on an exception from a command that was
- * typed. */
- set_vim_var_string(VV_THROWPOINT, NULL, -1);
- } else {
- set_vim_var_string(VV_EXCEPTION, NULL, -1);
- set_vim_var_string(VV_THROWPOINT, NULL, -1);
- }
-
- /* Discard the exception, but use the finish message for 'verbose'. */
- discard_exception(excp, TRUE);
-}
-
-/*
- * Flags specifying the message displayed by report_pending.
- */
-#define RP_MAKE 0
-#define RP_RESUME 1
-#define RP_DISCARD 2
-
-/*
- * Report information about something pending in a finally clause if required by
- * the 'verbose' option or when debugging. "action" tells whether something is
- * made pending or something pending is resumed or discarded. "pending" tells
- * what is pending. "value" specifies the return value for a pending ":return"
- * or the exception value for a pending exception.
- */
-static void report_pending(int action, int pending, void *value)
-{
- char_u *mesg;
- char *s;
- int save_msg_silent;
-
-
- switch (action) {
- case RP_MAKE:
- mesg = (char_u *)_("%s made pending");
- break;
- case RP_RESUME:
- mesg = (char_u *)_("%s resumed");
- break;
- /* case RP_DISCARD: */
- default:
- mesg = (char_u *)_("%s discarded");
- break;
- }
-
- switch (pending) {
- case CSTP_NONE:
- return;
-
- case CSTP_CONTINUE:
- s = ":continue";
- break;
- case CSTP_BREAK:
- s = ":break";
- break;
- case CSTP_FINISH:
- s = ":finish";
- break;
- case CSTP_RETURN:
- /* ":return" command producing value, allocated */
- s = (char *)get_return_cmd(value);
- break;
-
- default:
- if (pending & CSTP_THROW) {
- vim_snprintf((char *)IObuff, IOSIZE,
- (char *)mesg, _("Exception"));
- mesg = vim_strnsave(IObuff, (int)STRLEN(IObuff) + 4);
- STRCAT(mesg, ": %s");
- s = (char *)((except_T *)value)->value;
- } else if ((pending & CSTP_ERROR) && (pending & CSTP_INTERRUPT))
- s = _("Error and interrupt");
- else if (pending & CSTP_ERROR)
- s = _("Error");
- else /* if (pending & CSTP_INTERRUPT) */
- s = _("Interrupt");
- }
-
- save_msg_silent = msg_silent;
- if (debug_break_level > 0)
- msg_silent = FALSE; /* display messages */
- ++no_wait_return;
- msg_scroll = TRUE; /* always scroll up, don't overwrite */
- smsg(mesg, (char_u *)s);
- msg_puts((char_u *)"\n"); /* don't overwrite this either */
- cmdline_row = msg_row;
- --no_wait_return;
- if (debug_break_level > 0)
- msg_silent = save_msg_silent;
-
- if (pending == CSTP_RETURN)
- free(s);
- else if (pending & CSTP_THROW)
- free(mesg);
-}
-
-/*
- * If something is made pending in a finally clause, report it if required by
- * the 'verbose' option or when debugging.
- */
-void report_make_pending(int pending, void *value)
-{
- if (p_verbose >= 14 || debug_break_level > 0) {
- if (debug_break_level <= 0)
- verbose_enter();
- report_pending(RP_MAKE, pending, value);
- if (debug_break_level <= 0)
- verbose_leave();
- }
-}
-
-/*
- * If something pending in a finally clause is resumed at the ":endtry", report
- * it if required by the 'verbose' option or when debugging.
- */
-void report_resume_pending(int pending, void *value)
-{
- if (p_verbose >= 14 || debug_break_level > 0) {
- if (debug_break_level <= 0)
- verbose_enter();
- report_pending(RP_RESUME, pending, value);
- if (debug_break_level <= 0)
- verbose_leave();
- }
-}
-
-/*
- * If something pending in a finally clause is discarded, report it if required
- * by the 'verbose' option or when debugging.
- */
-void report_discard_pending(int pending, void *value)
-{
- if (p_verbose >= 14 || debug_break_level > 0) {
- if (debug_break_level <= 0)
- verbose_enter();
- report_pending(RP_DISCARD, pending, value);
- if (debug_break_level <= 0)
- verbose_leave();
- }
-}
-
-
-/*
- * ":if".
- */
-void ex_if(exarg_T *eap)
-{
- int error;
- int skip;
- int result;
- struct condstack *cstack = eap->cstack;
-
- if (cstack->cs_idx == CSTACK_LEN - 1)
- eap->errmsg = (char_u *)N_("E579: :if nesting too deep");
- else {
- ++cstack->cs_idx;
- cstack->cs_flags[cstack->cs_idx] = 0;
-
- /*
- * Don't do something after an error, interrupt, or throw, or when there
- * is a surrounding conditional and it was not active.
- */
- skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0
- && !(cstack->cs_flags[cstack->
- cs_idx -
- 1] &
- CSF_ACTIVE));
-
- result = eval_to_bool(eap->arg, &error, &eap->nextcmd, skip);
-
- if (!skip && !error) {
- if (result)
- cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE | CSF_TRUE;
- } else
- /* set TRUE, so this conditional will never get active */
- cstack->cs_flags[cstack->cs_idx] = CSF_TRUE;
- }
-}
-
-/*
- * ":endif".
- */
-void ex_endif(exarg_T *eap)
-{
- did_endif = TRUE;
- if (eap->cstack->cs_idx < 0
- || (eap->cstack->cs_flags[eap->cstack->cs_idx]
- & (CSF_WHILE | CSF_FOR | CSF_TRY)))
- eap->errmsg = (char_u *)N_("E580: :endif without :if");
- else {
- /*
- * When debugging or a breakpoint was encountered, display the debug
- * prompt (if not already done). This shows the user that an ":endif"
- * is executed when the ":if" or a previous ":elseif" was not TRUE.
- * Handle a ">quit" debug command as if an interrupt had occurred before
- * the ":endif". That is, throw an interrupt exception if appropriate.
- * Doing this here prevents an exception for a parsing error being
- * discarded by throwing the interrupt exception later on.
- */
- if (!(eap->cstack->cs_flags[eap->cstack->cs_idx] & CSF_TRUE)
- && dbg_check_skipped(eap))
- (void)do_intthrow(eap->cstack);
-
- --eap->cstack->cs_idx;
- }
-}
-
-/*
- * ":else" and ":elseif".
- */
-void ex_else(exarg_T *eap)
-{
- int error;
- int skip;
- int result;
- struct condstack *cstack = eap->cstack;
-
- /*
- * Don't do something after an error, interrupt, or throw, or when there is
- * a surrounding conditional and it was not active.
- */
- skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0
- && !(cstack->cs_flags[cstack->
- cs_idx -
- 1] &
- CSF_ACTIVE));
-
- if (cstack->cs_idx < 0
- || (cstack->cs_flags[cstack->cs_idx]
- & (CSF_WHILE | CSF_FOR | CSF_TRY))) {
- if (eap->cmdidx == CMD_else) {
- eap->errmsg = (char_u *)N_("E581: :else without :if");
- return;
- }
- eap->errmsg = (char_u *)N_("E582: :elseif without :if");
- skip = TRUE;
- } else if (cstack->cs_flags[cstack->cs_idx] & CSF_ELSE) {
- if (eap->cmdidx == CMD_else) {
- eap->errmsg = (char_u *)N_("E583: multiple :else");
- return;
- }
- eap->errmsg = (char_u *)N_("E584: :elseif after :else");
- skip = TRUE;
- }
-
- /* if skipping or the ":if" was TRUE, reset ACTIVE, otherwise set it */
- if (skip || cstack->cs_flags[cstack->cs_idx] & CSF_TRUE) {
- if (eap->errmsg == NULL)
- cstack->cs_flags[cstack->cs_idx] = CSF_TRUE;
- skip = TRUE; /* don't evaluate an ":elseif" */
- } else
- cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE;
-
- /*
- * When debugging or a breakpoint was encountered, display the debug prompt
- * (if not already done). This shows the user that an ":else" or ":elseif"
- * is executed when the ":if" or previous ":elseif" was not TRUE. Handle
- * a ">quit" debug command as if an interrupt had occurred before the
- * ":else" or ":elseif". That is, set "skip" and throw an interrupt
- * exception if appropriate. Doing this here prevents that an exception
- * for a parsing errors is discarded when throwing the interrupt exception
- * later on.
- */
- if (!skip && dbg_check_skipped(eap) && got_int) {
- (void)do_intthrow(cstack);
- skip = TRUE;
- }
-
- if (eap->cmdidx == CMD_elseif) {
- result = eval_to_bool(eap->arg, &error, &eap->nextcmd, skip);
- /* When throwing error exceptions, we want to throw always the first
- * of several errors in a row. This is what actually happens when
- * a conditional error was detected above and there is another failure
- * when parsing the expression. Since the skip flag is set in this
- * case, the parsing error will be ignored by emsg(). */
-
- if (!skip && !error) {
- if (result)
- cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE | CSF_TRUE;
- else
- cstack->cs_flags[cstack->cs_idx] = 0;
- } else if (eap->errmsg == NULL)
- /* set TRUE, so this conditional will never get active */
- cstack->cs_flags[cstack->cs_idx] = CSF_TRUE;
- } else
- cstack->cs_flags[cstack->cs_idx] |= CSF_ELSE;
-}
-
-/*
- * Handle ":while" and ":for".
- */
-void ex_while(exarg_T *eap)
-{
- int error;
- int skip;
- int result;
- struct condstack *cstack = eap->cstack;
-
- if (cstack->cs_idx == CSTACK_LEN - 1)
- eap->errmsg = (char_u *)N_("E585: :while/:for nesting too deep");
- else {
- /*
- * The loop flag is set when we have jumped back from the matching
- * ":endwhile" or ":endfor". When not set, need to initialise this
- * cstack entry.
- */
- if ((cstack->cs_lflags & CSL_HAD_LOOP) == 0) {
- ++cstack->cs_idx;
- ++cstack->cs_looplevel;
- cstack->cs_line[cstack->cs_idx] = -1;
- }
- cstack->cs_flags[cstack->cs_idx] =
- eap->cmdidx == CMD_while ? CSF_WHILE : CSF_FOR;
-
- /*
- * Don't do something after an error, interrupt, or throw, or when
- * there is a surrounding conditional and it was not active.
- */
- skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0
- && !(cstack->cs_flags[cstack->
- cs_idx -
- 1] &
- CSF_ACTIVE));
- if (eap->cmdidx == CMD_while) {
- /*
- * ":while bool-expr"
- */
- result = eval_to_bool(eap->arg, &error, &eap->nextcmd, skip);
- } else {
- void *fi;
-
- /*
- * ":for var in list-expr"
- */
- if ((cstack->cs_lflags & CSL_HAD_LOOP) != 0) {
- /* Jumping here from a ":continue" or ":endfor": use the
- * previously evaluated list. */
- fi = cstack->cs_forinfo[cstack->cs_idx];
- error = FALSE;
- } else {
- /* Evaluate the argument and get the info in a structure. */
- fi = eval_for_line(eap->arg, &error, &eap->nextcmd, skip);
- cstack->cs_forinfo[cstack->cs_idx] = fi;
- }
-
- /* use the element at the start of the list and advance */
- if (!error && fi != NULL && !skip)
- result = next_for_item(fi, eap->arg);
- else
- result = FALSE;
-
- if (!result) {
- free_for_info(fi);
- cstack->cs_forinfo[cstack->cs_idx] = NULL;
- }
- }
-
- /*
- * If this cstack entry was just initialised and is active, set the
- * loop flag, so do_cmdline() will set the line number in cs_line[].
- * If executing the command a second time, clear the loop flag.
- */
- if (!skip && !error && result) {
- cstack->cs_flags[cstack->cs_idx] |= (CSF_ACTIVE | CSF_TRUE);
- cstack->cs_lflags ^= CSL_HAD_LOOP;
- } else {
- cstack->cs_lflags &= ~CSL_HAD_LOOP;
- /* If the ":while" evaluates to FALSE or ":for" is past the end of
- * the list, show the debug prompt at the ":endwhile"/":endfor" as
- * if there was a ":break" in a ":while"/":for" evaluating to
- * TRUE. */
- if (!skip && !error)
- cstack->cs_flags[cstack->cs_idx] |= CSF_TRUE;
- }
- }
-}
-
-/*
- * ":continue"
- */
-void ex_continue(exarg_T *eap)
-{
- int idx;
- struct condstack *cstack = eap->cstack;
-
- if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0)
- eap->errmsg = (char_u *)N_("E586: :continue without :while or :for");
- else {
- /* Try to find the matching ":while". This might stop at a try
- * conditional not in its finally clause (which is then to be executed
- * next). Therefor, inactivate all conditionals except the ":while"
- * itself (if reached). */
- idx = cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, FALSE);
- if (idx >= 0 && (cstack->cs_flags[idx] & (CSF_WHILE | CSF_FOR))) {
- rewind_conditionals(cstack, idx, CSF_TRY, &cstack->cs_trylevel);
-
- /*
- * Set CSL_HAD_CONT, so do_cmdline() will jump back to the
- * matching ":while".
- */
- cstack->cs_lflags |= CSL_HAD_CONT; /* let do_cmdline() handle it */
- } else {
- /* If a try conditional not in its finally clause is reached first,
- * make the ":continue" pending for execution at the ":endtry". */
- cstack->cs_pending[idx] = CSTP_CONTINUE;
- report_make_pending(CSTP_CONTINUE, NULL);
- }
- }
-}
-
-/*
- * ":break"
- */
-void ex_break(exarg_T *eap)
-{
- int idx;
- struct condstack *cstack = eap->cstack;
-
- if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0)
- eap->errmsg = (char_u *)N_("E587: :break without :while or :for");
- else {
- /* Inactivate conditionals until the matching ":while" or a try
- * conditional not in its finally clause (which is then to be
- * executed next) is found. In the latter case, make the ":break"
- * pending for execution at the ":endtry". */
- idx = cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, TRUE);
- if (idx >= 0 && !(cstack->cs_flags[idx] & (CSF_WHILE | CSF_FOR))) {
- cstack->cs_pending[idx] = CSTP_BREAK;
- report_make_pending(CSTP_BREAK, NULL);
- }
- }
-}
-
-/*
- * ":endwhile" and ":endfor"
- */
-void ex_endwhile(exarg_T *eap)
-{
- struct condstack *cstack = eap->cstack;
- int idx;
- char_u *err;
- int csf;
- int fl;
-
- if (eap->cmdidx == CMD_endwhile) {
- err = e_while;
- csf = CSF_WHILE;
- } else {
- err = e_for;
- csf = CSF_FOR;
- }
-
- if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0)
- eap->errmsg = err;
- else {
- fl = cstack->cs_flags[cstack->cs_idx];
- if (!(fl & csf)) {
- /* If we are in a ":while" or ":for" but used the wrong endloop
- * command, do not rewind to the next enclosing ":for"/":while". */
- if (fl & CSF_WHILE)
- eap->errmsg = (char_u *)_("E732: Using :endfor with :while");
- else if (fl & CSF_FOR)
- eap->errmsg = (char_u *)_("E733: Using :endwhile with :for");
- }
- if (!(fl & (CSF_WHILE | CSF_FOR))) {
- if (!(fl & CSF_TRY))
- eap->errmsg = e_endif;
- else if (fl & CSF_FINALLY)
- eap->errmsg = e_endtry;
- /* Try to find the matching ":while" and report what's missing. */
- for (idx = cstack->cs_idx; idx > 0; --idx) {
- fl = cstack->cs_flags[idx];
- if ((fl & CSF_TRY) && !(fl & CSF_FINALLY)) {
- /* Give up at a try conditional not in its finally clause.
- * Ignore the ":endwhile"/":endfor". */
- eap->errmsg = err;
- return;
- }
- if (fl & csf)
- break;
- }
- /* Cleanup and rewind all contained (and unclosed) conditionals. */
- (void)cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, FALSE);
- rewind_conditionals(cstack, idx, CSF_TRY, &cstack->cs_trylevel);
- }
- /*
- * When debugging or a breakpoint was encountered, display the debug
- * prompt (if not already done). This shows the user that an
- * ":endwhile"/":endfor" is executed when the ":while" was not TRUE or
- * after a ":break". Handle a ">quit" debug command as if an
- * interrupt had occurred before the ":endwhile"/":endfor". That is,
- * throw an interrupt exception if appropriate. Doing this here
- * prevents that an exception for a parsing error is discarded when
- * throwing the interrupt exception later on.
- */
- else if (cstack->cs_flags[cstack->cs_idx] & CSF_TRUE
- && !(cstack->cs_flags[cstack->cs_idx] & CSF_ACTIVE)
- && dbg_check_skipped(eap))
- (void)do_intthrow(cstack);
-
- /*
- * Set loop flag, so do_cmdline() will jump back to the matching
- * ":while" or ":for".
- */
- cstack->cs_lflags |= CSL_HAD_ENDLOOP;
- }
-}
-
-
-/*
- * ":throw expr"
- */
-void ex_throw(exarg_T *eap)
-{
- char_u *arg = eap->arg;
- char_u *value;
-
- if (*arg != NUL && *arg != '|' && *arg != '\n')
- value = eval_to_string_skip(arg, &eap->nextcmd, eap->skip);
- else {
- EMSG(_(e_argreq));
- value = NULL;
- }
-
- /* On error or when an exception is thrown during argument evaluation, do
- * not throw. */
- if (!eap->skip && value != NULL) {
- if (throw_exception(value, ET_USER, NULL) == FAIL)
- free(value);
- else
- do_throw(eap->cstack);
- }
-}
-
-/*
- * Throw the current exception through the specified cstack. Common routine
- * for ":throw" (user exception) and error and interrupt exceptions. Also
- * used for rethrowing an uncaught exception.
- */
-void do_throw(struct condstack *cstack)
-{
- int idx;
- int inactivate_try = FALSE;
-
- /*
- * Cleanup and inactivate up to the next surrounding try conditional that
- * is not in its finally clause. Normally, do not inactivate the try
- * conditional itself, so that its ACTIVE flag can be tested below. But
- * if a previous error or interrupt has not been converted to an exception,
- * inactivate the try conditional, too, as if the conversion had been done,
- * and reset the did_emsg or got_int flag, so this won't happen again at
- * the next surrounding try conditional.
- */
-#ifndef THROW_ON_ERROR_TRUE
- if (did_emsg && !THROW_ON_ERROR) {
- inactivate_try = TRUE;
- did_emsg = FALSE;
- }
-#endif
-#ifndef THROW_ON_INTERRUPT_TRUE
- if (got_int && !THROW_ON_INTERRUPT) {
- inactivate_try = TRUE;
- got_int = FALSE;
- }
-#endif
- idx = cleanup_conditionals(cstack, 0, inactivate_try);
- if (idx >= 0) {
- /*
- * If this try conditional is active and we are before its first
- * ":catch", set THROWN so that the ":catch" commands will check
- * whether the exception matches. When the exception came from any of
- * the catch clauses, it will be made pending at the ":finally" (if
- * present) and rethrown at the ":endtry". This will also happen if
- * the try conditional is inactive. This is the case when we are
- * throwing an exception due to an error or interrupt on the way from
- * a preceding ":continue", ":break", ":return", ":finish", error or
- * interrupt (not converted to an exception) to the finally clause or
- * from a preceding throw of a user or error or interrupt exception to
- * the matching catch clause or the finally clause.
- */
- if (!(cstack->cs_flags[idx] & CSF_CAUGHT)) {
- if (cstack->cs_flags[idx] & CSF_ACTIVE)
- cstack->cs_flags[idx] |= CSF_THROWN;
- else
- /* THROWN may have already been set for a catchable exception
- * that has been discarded. Ensure it is reset for the new
- * exception. */
- cstack->cs_flags[idx] &= ~CSF_THROWN;
- }
- cstack->cs_flags[idx] &= ~CSF_ACTIVE;
- cstack->cs_exception[idx] = current_exception;
- }
-
- did_throw = TRUE;
-}
-
-/*
- * ":try"
- */
-void ex_try(exarg_T *eap)
-{
- int skip;
- struct condstack *cstack = eap->cstack;
-
- if (cstack->cs_idx == CSTACK_LEN - 1)
- eap->errmsg = (char_u *)N_("E601: :try nesting too deep");
- else {
- ++cstack->cs_idx;
- ++cstack->cs_trylevel;
- cstack->cs_flags[cstack->cs_idx] = CSF_TRY;
- cstack->cs_pending[cstack->cs_idx] = CSTP_NONE;
-
- /*
- * Don't do something after an error, interrupt, or throw, or when there
- * is a surrounding conditional and it was not active.
- */
- skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0
- && !(cstack->cs_flags[cstack->
- cs_idx -
- 1] &
- CSF_ACTIVE));
-
- if (!skip) {
- /* Set ACTIVE and TRUE. TRUE means that the corresponding ":catch"
- * commands should check for a match if an exception is thrown and
- * that the finally clause needs to be executed. */
- cstack->cs_flags[cstack->cs_idx] |= CSF_ACTIVE | CSF_TRUE;
-
- /*
- * ":silent!", even when used in a try conditional, disables
- * displaying of error messages and conversion of errors to
- * exceptions. When the silent commands again open a try
- * conditional, save "emsg_silent" and reset it so that errors are
- * again converted to exceptions. The value is restored when that
- * try conditional is left. If it is left normally, the commands
- * following the ":endtry" are again silent. If it is left by
- * a ":continue", ":break", ":return", or ":finish", the commands
- * executed next are again silent. If it is left due to an
- * aborting error, an interrupt, or an exception, restoring
- * "emsg_silent" does not matter since we are already in the
- * aborting state and/or the exception has already been thrown.
- * The effect is then just freeing the memory that was allocated
- * to save the value.
- */
- if (emsg_silent) {
- eslist_T *elem;
-
- elem = (eslist_T *)alloc((unsigned)sizeof(struct eslist_elem));
- if (elem == NULL)
- EMSG(_(e_outofmem));
- else {
- elem->saved_emsg_silent = emsg_silent;
- elem->next = cstack->cs_emsg_silent_list;
- cstack->cs_emsg_silent_list = elem;
- cstack->cs_flags[cstack->cs_idx] |= CSF_SILENT;
- emsg_silent = 0;
- }
- }
- }
-
- }
-}
-
-/*
- * ":catch /{pattern}/" and ":catch"
- */
-void ex_catch(exarg_T *eap)
-{
- int idx = 0;
- int give_up = FALSE;
- int skip = FALSE;
- int caught = FALSE;
- char_u *end;
- int save_char = 0;
- char_u *save_cpo;
- regmatch_T regmatch;
- int prev_got_int;
- struct condstack *cstack = eap->cstack;
- char_u *pat;
-
- if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0) {
- eap->errmsg = (char_u *)N_("E603: :catch without :try");
- give_up = TRUE;
- } else {
- if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY)) {
- /* Report what's missing if the matching ":try" is not in its
- * finally clause. */
- eap->errmsg = get_end_emsg(cstack);
- skip = TRUE;
- }
- for (idx = cstack->cs_idx; idx > 0; --idx)
- if (cstack->cs_flags[idx] & CSF_TRY)
- break;
- if (cstack->cs_flags[idx] & CSF_FINALLY) {
- /* Give up for a ":catch" after ":finally" and ignore it.
- * Just parse. */
- eap->errmsg = (char_u *)N_("E604: :catch after :finally");
- give_up = TRUE;
- } else
- rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR,
- &cstack->cs_looplevel);
- }
-
- if (ends_excmd(*eap->arg)) { /* no argument, catch all errors */
- pat = (char_u *)".*";
- end = NULL;
- eap->nextcmd = find_nextcmd(eap->arg);
- } else {
- pat = eap->arg + 1;
- end = skip_regexp(pat, *eap->arg, TRUE, NULL);
- }
-
- if (!give_up) {
- /*
- * Don't do something when no exception has been thrown or when the
- * corresponding try block never got active (because of an inactive
- * surrounding conditional or after an error or interrupt or throw).
- */
- if (!did_throw || !(cstack->cs_flags[idx] & CSF_TRUE))
- skip = TRUE;
-
- /*
- * Check for a match only if an exception is thrown but not caught by
- * a previous ":catch". An exception that has replaced a discarded
- * exception is not checked (THROWN is not set then).
- */
- if (!skip && (cstack->cs_flags[idx] & CSF_THROWN)
- && !(cstack->cs_flags[idx] & CSF_CAUGHT)) {
- if (end != NULL && *end != NUL && !ends_excmd(*skipwhite(end + 1))) {
- EMSG(_(e_trailing));
- return;
- }
-
- /* When debugging or a breakpoint was encountered, display the
- * debug prompt (if not already done) before checking for a match.
- * This is a helpful hint for the user when the regular expression
- * matching fails. Handle a ">quit" debug command as if an
- * interrupt had occurred before the ":catch". That is, discard
- * the original exception, replace it by an interrupt exception,
- * and don't catch it in this try block. */
- if (!dbg_check_skipped(eap) || !do_intthrow(cstack)) {
- /* Terminate the pattern and avoid the 'l' flag in 'cpoptions'
- * while compiling it. */
- if (end != NULL) {
- save_char = *end;
- *end = NUL;
- }
- save_cpo = p_cpo;
- p_cpo = (char_u *)"";
- regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
- regmatch.rm_ic = FALSE;
- if (end != NULL)
- *end = save_char;
- p_cpo = save_cpo;
- if (regmatch.regprog == NULL)
- EMSG2(_(e_invarg2), pat);
- else {
- /*
- * Save the value of got_int and reset it. We don't want
- * a previous interruption cancel matching, only hitting
- * CTRL-C while matching should abort it.
- */
- prev_got_int = got_int;
- got_int = FALSE;
- caught = vim_regexec_nl(&regmatch, current_exception->value,
- (colnr_T)0);
- got_int |= prev_got_int;
- vim_regfree(regmatch.regprog);
- }
- }
- }
-
- if (caught) {
- /* Make this ":catch" clause active and reset did_emsg, got_int,
- * and did_throw. Put the exception on the caught stack. */
- cstack->cs_flags[idx] |= CSF_ACTIVE | CSF_CAUGHT;
- did_emsg = got_int = did_throw = FALSE;
- catch_exception((except_T *)cstack->cs_exception[idx]);
- /* It's mandatory that the current exception is stored in the cstack
- * so that it can be discarded at the next ":catch", ":finally", or
- * ":endtry" or when the catch clause is left by a ":continue",
- * ":break", ":return", ":finish", error, interrupt, or another
- * exception. */
- if (cstack->cs_exception[cstack->cs_idx] != current_exception)
- EMSG(_(e_internal));
- } else {
- /*
- * If there is a preceding catch clause and it caught the exception,
- * finish the exception now. This happens also after errors except
- * when this ":catch" was after the ":finally" or not within
- * a ":try". Make the try conditional inactive so that the
- * following catch clauses are skipped. On an error or interrupt
- * after the preceding try block or catch clause was left by
- * a ":continue", ":break", ":return", or ":finish", discard the
- * pending action.
- */
- cleanup_conditionals(cstack, CSF_TRY, TRUE);
- }
- }
-
- if (end != NULL)
- eap->nextcmd = find_nextcmd(end);
-}
-
-/*
- * ":finally"
- */
-void ex_finally(exarg_T *eap)
-{
- int idx;
- int skip = FALSE;
- int pending = CSTP_NONE;
- struct condstack *cstack = eap->cstack;
-
- if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0)
- eap->errmsg = (char_u *)N_("E606: :finally without :try");
- else {
- if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY)) {
- eap->errmsg = get_end_emsg(cstack);
- for (idx = cstack->cs_idx - 1; idx > 0; --idx)
- if (cstack->cs_flags[idx] & CSF_TRY)
- break;
- /* Make this error pending, so that the commands in the following
- * finally clause can be executed. This overrules also a pending
- * ":continue", ":break", ":return", or ":finish". */
- pending = CSTP_ERROR;
- } else
- idx = cstack->cs_idx;
-
- if (cstack->cs_flags[idx] & CSF_FINALLY) {
- /* Give up for a multiple ":finally" and ignore it. */
- eap->errmsg = (char_u *)N_("E607: multiple :finally");
- return;
- }
- rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR,
- &cstack->cs_looplevel);
-
- /*
- * Don't do something when the corresponding try block never got active
- * (because of an inactive surrounding conditional or after an error or
- * interrupt or throw) or for a ":finally" without ":try" or a multiple
- * ":finally". After every other error (did_emsg or the conditional
- * errors detected above) or after an interrupt (got_int) or an
- * exception (did_throw), the finally clause must be executed.
- */
- skip = !(cstack->cs_flags[cstack->cs_idx] & CSF_TRUE);
-
- if (!skip) {
- /* When debugging or a breakpoint was encountered, display the
- * debug prompt (if not already done). The user then knows that the
- * finally clause is executed. */
- if (dbg_check_skipped(eap)) {
- /* Handle a ">quit" debug command as if an interrupt had
- * occurred before the ":finally". That is, discard the
- * original exception and replace it by an interrupt
- * exception. */
- (void)do_intthrow(cstack);
- }
-
- /*
- * If there is a preceding catch clause and it caught the exception,
- * finish the exception now. This happens also after errors except
- * when this is a multiple ":finally" or one not within a ":try".
- * After an error or interrupt, this also discards a pending
- * ":continue", ":break", ":finish", or ":return" from the preceding
- * try block or catch clause.
- */
- cleanup_conditionals(cstack, CSF_TRY, FALSE);
-
- /*
- * Make did_emsg, got_int, did_throw pending. If set, they overrule
- * a pending ":continue", ":break", ":return", or ":finish". Then
- * we have particularly to discard a pending return value (as done
- * by the call to cleanup_conditionals() above when did_emsg or
- * got_int is set). The pending values are restored by the
- * ":endtry", except if there is a new error, interrupt, exception,
- * ":continue", ":break", ":return", or ":finish" in the following
- * finally clause. A missing ":endwhile", ":endfor" or ":endif"
- * detected here is treated as if did_emsg and did_throw had
- * already been set, respectively in case that the error is not
- * converted to an exception, did_throw had already been unset.
- * We must not set did_emsg here since that would suppress the
- * error message.
- */
- if (pending == CSTP_ERROR || did_emsg || got_int || did_throw) {
- if (cstack->cs_pending[cstack->cs_idx] == CSTP_RETURN) {
- report_discard_pending(CSTP_RETURN,
- cstack->cs_rettv[cstack->cs_idx]);
- discard_pending_return(cstack->cs_rettv[cstack->cs_idx]);
- }
- if (pending == CSTP_ERROR && !did_emsg)
- pending |= (THROW_ON_ERROR) ? CSTP_THROW : 0;
- else
- pending |= did_throw ? CSTP_THROW : 0;
- pending |= did_emsg ? CSTP_ERROR : 0;
- pending |= got_int ? CSTP_INTERRUPT : 0;
- cstack->cs_pending[cstack->cs_idx] = pending;
-
- /* It's mandatory that the current exception is stored in the
- * cstack so that it can be rethrown at the ":endtry" or be
- * discarded if the finally clause is left by a ":continue",
- * ":break", ":return", ":finish", error, interrupt, or another
- * exception. When emsg() is called for a missing ":endif" or
- * a missing ":endwhile"/":endfor" detected here, the
- * exception will be discarded. */
- if (did_throw && cstack->cs_exception[cstack->cs_idx]
- != current_exception)
- EMSG(_(e_internal));
- }
-
- /*
- * Set CSL_HAD_FINA, so do_cmdline() will reset did_emsg,
- * got_int, and did_throw and make the finally clause active.
- * This will happen after emsg() has been called for a missing
- * ":endif" or a missing ":endwhile"/":endfor" detected here, so
- * that the following finally clause will be executed even then.
- */
- cstack->cs_lflags |= CSL_HAD_FINA;
- }
- }
-}
-
-/*
- * ":endtry"
- */
-void ex_endtry(exarg_T *eap)
-{
- int idx;
- int skip;
- int rethrow = FALSE;
- int pending = CSTP_NONE;
- void *rettv = NULL;
- struct condstack *cstack = eap->cstack;
-
- if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0)
- eap->errmsg = (char_u *)N_("E602: :endtry without :try");
- else {
- /*
- * Don't do something after an error, interrupt or throw in the try
- * block, catch clause, or finally clause preceding this ":endtry" or
- * when an error or interrupt occurred after a ":continue", ":break",
- * ":return", or ":finish" in a try block or catch clause preceding this
- * ":endtry" or when the try block never got active (because of an
- * inactive surrounding conditional or after an error or interrupt or
- * throw) or when there is a surrounding conditional and it has been
- * made inactive by a ":continue", ":break", ":return", or ":finish" in
- * the finally clause. The latter case need not be tested since then
- * anything pending has already been discarded. */
- skip = did_emsg || got_int || did_throw ||
- !(cstack->cs_flags[cstack->cs_idx] & CSF_TRUE);
-
- if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY)) {
- eap->errmsg = get_end_emsg(cstack);
- /* Find the matching ":try" and report what's missing. */
- idx = cstack->cs_idx;
- do
- --idx;
- while (idx > 0 && !(cstack->cs_flags[idx] & CSF_TRY));
- rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR,
- &cstack->cs_looplevel);
- skip = TRUE;
-
- /*
- * If an exception is being thrown, discard it to prevent it from
- * being rethrown at the end of this function. It would be
- * discarded by the error message, anyway. Resets did_throw.
- * This does not affect the script termination due to the error
- * since "trylevel" is decremented after emsg() has been called.
- */
- if (did_throw)
- discard_current_exception();
- } else {
- idx = cstack->cs_idx;
-
- /*
- * If we stopped with the exception currently being thrown at this
- * try conditional since we didn't know that it doesn't have
- * a finally clause, we need to rethrow it after closing the try
- * conditional.
- */
- if (did_throw && (cstack->cs_flags[idx] & CSF_TRUE)
- && !(cstack->cs_flags[idx] & CSF_FINALLY))
- rethrow = TRUE;
- }
-
- /* If there was no finally clause, show the user when debugging or
- * a breakpoint was encountered that the end of the try conditional has
- * been reached: display the debug prompt (if not already done). Do
- * this on normal control flow or when an exception was thrown, but not
- * on an interrupt or error not converted to an exception or when
- * a ":break", ":continue", ":return", or ":finish" is pending. These
- * actions are carried out immediately.
- */
- if ((rethrow || (!skip
- && !(cstack->cs_flags[idx] & CSF_FINALLY)
- && !cstack->cs_pending[idx]))
- && dbg_check_skipped(eap)) {
- /* Handle a ">quit" debug command as if an interrupt had occurred
- * before the ":endtry". That is, throw an interrupt exception and
- * set "skip" and "rethrow". */
- if (got_int) {
- skip = TRUE;
- (void)do_intthrow(cstack);
- /* The do_intthrow() call may have reset did_throw or
- * cstack->cs_pending[idx].*/
- rethrow = FALSE;
- if (did_throw && !(cstack->cs_flags[idx] & CSF_FINALLY))
- rethrow = TRUE;
- }
- }
-
- /*
- * If a ":return" is pending, we need to resume it after closing the
- * try conditional; remember the return value. If there was a finally
- * clause making an exception pending, we need to rethrow it. Make it
- * the exception currently being thrown.
- */
- if (!skip) {
- pending = cstack->cs_pending[idx];
- cstack->cs_pending[idx] = CSTP_NONE;
- if (pending == CSTP_RETURN)
- rettv = cstack->cs_rettv[idx];
- else if (pending & CSTP_THROW)
- current_exception = cstack->cs_exception[idx];
- }
-
- /*
- * Discard anything pending on an error, interrupt, or throw in the
- * finally clause. If there was no ":finally", discard a pending
- * ":continue", ":break", ":return", or ":finish" if an error or
- * interrupt occurred afterwards, but before the ":endtry" was reached.
- * If an exception was caught by the last of the catch clauses and there
- * was no finally clause, finish the exception now. This happens also
- * after errors except when this ":endtry" is not within a ":try".
- * Restore "emsg_silent" if it has been reset by this try conditional.
- */
- (void)cleanup_conditionals(cstack, CSF_TRY | CSF_SILENT, TRUE);
-
- --cstack->cs_idx;
- --cstack->cs_trylevel;
-
- if (!skip) {
- report_resume_pending(pending,
- (pending == CSTP_RETURN) ? rettv :
- (pending & CSTP_THROW) ? (void *)current_exception : NULL);
- switch (pending) {
- case CSTP_NONE:
- break;
-
- /* Reactivate a pending ":continue", ":break", ":return",
- * ":finish" from the try block or a catch clause of this try
- * conditional. This is skipped, if there was an error in an
- * (unskipped) conditional command or an interrupt afterwards
- * or if the finally clause is present and executed a new error,
- * interrupt, throw, ":continue", ":break", ":return", or
- * ":finish". */
- case CSTP_CONTINUE:
- ex_continue(eap);
- break;
- case CSTP_BREAK:
- ex_break(eap);
- break;
- case CSTP_RETURN:
- do_return(eap, FALSE, FALSE, rettv);
- break;
- case CSTP_FINISH:
- do_finish(eap, FALSE);
- break;
-
- /* When the finally clause was entered due to an error,
- * interrupt or throw (as opposed to a ":continue", ":break",
- * ":return", or ":finish"), restore the pending values of
- * did_emsg, got_int, and did_throw. This is skipped, if there
- * was a new error, interrupt, throw, ":continue", ":break",
- * ":return", or ":finish". in the finally clause. */
- default:
- if (pending & CSTP_ERROR)
- did_emsg = TRUE;
- if (pending & CSTP_INTERRUPT)
- got_int = TRUE;
- if (pending & CSTP_THROW)
- rethrow = TRUE;
- break;
- }
- }
-
- if (rethrow)
- /* Rethrow the current exception (within this cstack). */
- do_throw(cstack);
- }
-}
-
-/*
- * enter_cleanup() and leave_cleanup()
- *
- * Functions to be called before/after invoking a sequence of autocommands for
- * cleanup for a failed command. (Failure means here that a call to emsg()
- * has been made, an interrupt occurred, or there is an uncaught exception
- * from a previous autocommand execution of the same command.)
- *
- * Call enter_cleanup() with a pointer to a cleanup_T and pass the same
- * pointer to leave_cleanup(). The cleanup_T structure stores the pending
- * error/interrupt/exception state.
- */
-
-/*
- * This function works a bit like ex_finally() except that there was not
- * actually an extra try block around the part that failed and an error or
- * interrupt has not (yet) been converted to an exception. This function
- * saves the error/interrupt/ exception state and prepares for the call to
- * do_cmdline() that is going to be made for the cleanup autocommand
- * execution.
- */
-void enter_cleanup(cleanup_T *csp)
-{
- int pending = CSTP_NONE;
-
- /*
- * Postpone did_emsg, got_int, did_throw. The pending values will be
- * restored by leave_cleanup() except if there was an aborting error,
- * interrupt, or uncaught exception after this function ends.
- */
- if (did_emsg || got_int || did_throw || need_rethrow) {
- csp->pending = (did_emsg ? CSTP_ERROR : 0)
- | (got_int ? CSTP_INTERRUPT : 0)
- | (did_throw ? CSTP_THROW : 0)
- | (need_rethrow ? CSTP_THROW : 0);
-
- /* If we are currently throwing an exception (did_throw), save it as
- * well. On an error not yet converted to an exception, update
- * "force_abort" and reset "cause_abort" (as do_errthrow() would do).
- * This is needed for the do_cmdline() call that is going to be made
- * for autocommand execution. We need not save *msg_list because
- * there is an extra instance for every call of do_cmdline(), anyway.
- */
- if (did_throw || need_rethrow)
- csp->exception = current_exception;
- else {
- csp->exception = NULL;
- if (did_emsg) {
- force_abort |= cause_abort;
- cause_abort = FALSE;
- }
- }
- did_emsg = got_int = did_throw = need_rethrow = FALSE;
-
- /* Report if required by the 'verbose' option or when debugging. */
- report_make_pending(pending, csp->exception);
- } else {
- csp->pending = CSTP_NONE;
- csp->exception = NULL;
- }
-}
-
-/*
- * See comment above enter_cleanup() for how this function is used.
- *
- * This function is a bit like ex_endtry() except that there was not actually
- * an extra try block around the part that failed and an error or interrupt
- * had not (yet) been converted to an exception when the cleanup autocommand
- * sequence was invoked.
- *
- * This function has to be called with the address of the cleanup_T structure
- * filled by enter_cleanup() as an argument; it restores the error/interrupt/
- * exception state saved by that function - except there was an aborting
- * error, an interrupt or an uncaught exception during execution of the
- * cleanup autocommands. In the latter case, the saved error/interrupt/
- * exception state is discarded.
- */
-void leave_cleanup(cleanup_T *csp)
-{
- int pending = csp->pending;
-
- if (pending == CSTP_NONE) /* nothing to do */
- return;
-
- /* If there was an aborting error, an interrupt, or an uncaught exception
- * after the corresponding call to enter_cleanup(), discard what has been
- * made pending by it. Report this to the user if required by the
- * 'verbose' option or when debugging. */
- if (aborting() || need_rethrow) {
- if (pending & CSTP_THROW)
- /* Cancel the pending exception (includes report). */
- discard_exception((except_T *)csp->exception, FALSE);
- else
- report_discard_pending(pending, NULL);
-
- /* If an error was about to be converted to an exception when
- * enter_cleanup() was called, free the message list. */
- if (msg_list != NULL)
- free_global_msglist();
- }
- /*
- * If there was no new error, interrupt, or throw between the calls
- * to enter_cleanup() and leave_cleanup(), restore the pending
- * error/interrupt/exception state.
- */
- else {
- /*
- * If there was an exception being thrown when enter_cleanup() was
- * called, we need to rethrow it. Make it the exception currently
- * being thrown.
- */
- if (pending & CSTP_THROW)
- current_exception = csp->exception;
-
- /*
- * If an error was about to be converted to an exception when
- * enter_cleanup() was called, let "cause_abort" take the part of
- * "force_abort" (as done by cause_errthrow()).
- */
- else if (pending & CSTP_ERROR) {
- cause_abort = force_abort;
- force_abort = FALSE;
- }
-
- /*
- * Restore the pending values of did_emsg, got_int, and did_throw.
- */
- if (pending & CSTP_ERROR)
- did_emsg = TRUE;
- if (pending & CSTP_INTERRUPT)
- got_int = TRUE;
- if (pending & CSTP_THROW)
- need_rethrow = TRUE; /* did_throw will be set by do_one_cmd() */
-
- /* Report if required by the 'verbose' option or when debugging. */
- report_resume_pending(pending,
- (pending & CSTP_THROW) ? (void *)current_exception : NULL);
- }
-}
-
-
-/*
- * Make conditionals inactive and discard what's pending in finally clauses
- * until the conditional type searched for or a try conditional not in its
- * finally clause is reached. If this is in an active catch clause, finish
- * the caught exception.
- * Return the cstack index where the search stopped.
- * Values used for "searched_cond" are (CSF_WHILE | CSF_FOR) or CSF_TRY or 0,
- * the latter meaning the innermost try conditional not in its finally clause.
- * "inclusive" tells whether the conditional searched for should be made
- * inactive itself (a try conditional not in its finally clause possibly find
- * before is always made inactive). If "inclusive" is TRUE and
- * "searched_cond" is CSF_TRY|CSF_SILENT, the saved former value of
- * "emsg_silent", if reset when the try conditional finally reached was
- * entered, is restored (used by ex_endtry()). This is normally done only
- * when such a try conditional is left.
- */
-int cleanup_conditionals(struct condstack *cstack, int searched_cond, int inclusive)
-{
- int idx;
- int stop = FALSE;
-
- for (idx = cstack->cs_idx; idx >= 0; --idx) {
- if (cstack->cs_flags[idx] & CSF_TRY) {
- /*
- * Discard anything pending in a finally clause and continue the
- * search. There may also be a pending ":continue", ":break",
- * ":return", or ":finish" before the finally clause. We must not
- * discard it, unless an error or interrupt occurred afterwards.
- */
- if (did_emsg || got_int || (cstack->cs_flags[idx] & CSF_FINALLY)) {
- switch (cstack->cs_pending[idx]) {
- case CSTP_NONE:
- break;
-
- case CSTP_CONTINUE:
- case CSTP_BREAK:
- case CSTP_FINISH:
- report_discard_pending(cstack->cs_pending[idx], NULL);
- cstack->cs_pending[idx] = CSTP_NONE;
- break;
-
- case CSTP_RETURN:
- report_discard_pending(CSTP_RETURN,
- cstack->cs_rettv[idx]);
- discard_pending_return(cstack->cs_rettv[idx]);
- cstack->cs_pending[idx] = CSTP_NONE;
- break;
-
- default:
- if (cstack->cs_flags[idx] & CSF_FINALLY) {
- if (cstack->cs_pending[idx] & CSTP_THROW) {
- /* Cancel the pending exception. This is in the
- * finally clause, so that the stack of the
- * caught exceptions is not involved. */
- discard_exception((except_T *)
- cstack->cs_exception[idx],
- FALSE);
- } else
- report_discard_pending(cstack->cs_pending[idx],
- NULL);
- cstack->cs_pending[idx] = CSTP_NONE;
- }
- break;
- }
- }
-
- /*
- * Stop at a try conditional not in its finally clause. If this try
- * conditional is in an active catch clause, finish the caught
- * exception.
- */
- if (!(cstack->cs_flags[idx] & CSF_FINALLY)) {
- if ((cstack->cs_flags[idx] & CSF_ACTIVE)
- && (cstack->cs_flags[idx] & CSF_CAUGHT))
- finish_exception((except_T *)cstack->cs_exception[idx]);
- /* Stop at this try conditional - except the try block never
- * got active (because of an inactive surrounding conditional
- * or when the ":try" appeared after an error or interrupt or
- * throw). */
- if (cstack->cs_flags[idx] & CSF_TRUE) {
- if (searched_cond == 0 && !inclusive)
- break;
- stop = TRUE;
- }
- }
- }
-
- /* Stop on the searched conditional type (even when the surrounding
- * conditional is not active or something has been made pending).
- * If "inclusive" is TRUE and "searched_cond" is CSF_TRY|CSF_SILENT,
- * check first whether "emsg_silent" needs to be restored. */
- if (cstack->cs_flags[idx] & searched_cond) {
- if (!inclusive)
- break;
- stop = TRUE;
- }
- cstack->cs_flags[idx] &= ~CSF_ACTIVE;
- if (stop && searched_cond != (CSF_TRY | CSF_SILENT))
- break;
-
- /*
- * When leaving a try conditional that reset "emsg_silent" on its
- * entry after saving the original value, restore that value here and
- * free the memory used to store it.
- */
- if ((cstack->cs_flags[idx] & CSF_TRY)
- && (cstack->cs_flags[idx] & CSF_SILENT)) {
- eslist_T *elem;
-
- elem = cstack->cs_emsg_silent_list;
- cstack->cs_emsg_silent_list = elem->next;
- emsg_silent = elem->saved_emsg_silent;
- free(elem);
- cstack->cs_flags[idx] &= ~CSF_SILENT;
- }
- if (stop)
- break;
- }
- return idx;
-}
-
-/*
- * Return an appropriate error message for a missing endwhile/endfor/endif.
- */
-static char_u *get_end_emsg(struct condstack *cstack)
-{
- if (cstack->cs_flags[cstack->cs_idx] & CSF_WHILE)
- return e_endwhile;
- if (cstack->cs_flags[cstack->cs_idx] & CSF_FOR)
- return e_endfor;
- return e_endif;
-}
-
-
-/*
- * Rewind conditionals until index "idx" is reached. "cond_type" and
- * "cond_level" specify a conditional type and the address of a level variable
- * which is to be decremented with each skipped conditional of the specified
- * type.
- * Also free "for info" structures where needed.
- */
-void rewind_conditionals(struct condstack *cstack, int idx, int cond_type, int *cond_level)
-{
- while (cstack->cs_idx > idx) {
- if (cstack->cs_flags[cstack->cs_idx] & cond_type)
- --*cond_level;
- if (cstack->cs_flags[cstack->cs_idx] & CSF_FOR)
- free_for_info(cstack->cs_forinfo[cstack->cs_idx]);
- --cstack->cs_idx;
- }
-}
-
-/*
- * ":endfunction" when not after a ":function"
- */
-void ex_endfunction(exarg_T *eap)
-{
- EMSG(_("E193: :endfunction not inside a function"));
-}
-
-/*
- * Return TRUE if the string "p" looks like a ":while" or ":for" command.
- */
-int has_loop_cmd(char_u *p)
-{
- int len;
-
- /* skip modifiers, white space and ':' */
- for (;; ) {
- while (*p == ' ' || *p == '\t' || *p == ':')
- ++p;
- len = modifier_len(p);
- if (len == 0)
- break;
- p += len;
- }
- if ((p[0] == 'w' && p[1] == 'h')
- || (p[0] == 'f' && p[1] == 'o' && p[2] == 'r'))
- return TRUE;
- return FALSE;
-}
-