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+To: vim_dev@googlegroups.com
+Subject: Patch 7.3.603
+Fcc: outbox
+From: Bram Moolenaar <Bram@moolenaar.net>
+Mime-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+------------
+
+Patch 7.3.603
+Problem: It is possible to add replace builtin functions by calling
+ extend() on g:.
+Solution: Add a flag to a dict to indicate it is a scope. Check for
+ existing functions. (ZyX)
+Files: src/buffer.c, src/eval.c, src/proto/eval.pro, src/structs.h,
+ src/testdir/test34.in, src/testdir/test34.ok, src/window.c
+
+
+*** ../vim-7.3.602/src/buffer.c 2012-07-10 15:18:18.000000000 +0200
+--- src/buffer.c 2012-07-16 16:52:58.000000000 +0200
+***************
+*** 1747,1753 ****
+ buf->b_wininfo->wi_win = curwin;
+
+ #ifdef FEAT_EVAL
+! init_var_dict(&buf->b_vars, &buf->b_bufvar); /* init b: variables */
+ #endif
+ #ifdef FEAT_SYN_HL
+ hash_init(&buf->b_s.b_keywtab);
+--- 1747,1754 ----
+ buf->b_wininfo->wi_win = curwin;
+
+ #ifdef FEAT_EVAL
+! /* init b: variables */
+! init_var_dict(&buf->b_vars, &buf->b_bufvar, VAR_SCOPE);
+ #endif
+ #ifdef FEAT_SYN_HL
+ hash_init(&buf->b_s.b_keywtab);
+*** ../vim-7.3.602/src/eval.c 2012-07-10 13:41:09.000000000 +0200
+--- src/eval.c 2012-07-16 17:18:11.000000000 +0200
+***************
+*** 850,857 ****
+ int i;
+ struct vimvar *p;
+
+! init_var_dict(&globvardict, &globvars_var);
+! init_var_dict(&vimvardict, &vimvars_var);
+ vimvardict.dv_lock = VAR_FIXED;
+ hash_init(&compat_hashtab);
+ hash_init(&func_hashtab);
+--- 850,857 ----
+ int i;
+ struct vimvar *p;
+
+! init_var_dict(&globvardict, &globvars_var, VAR_DEF_SCOPE);
+! init_var_dict(&vimvardict, &vimvars_var, VAR_SCOPE);
+ vimvardict.dv_lock = VAR_FIXED;
+ hash_init(&compat_hashtab);
+ hash_init(&func_hashtab);
+***************
+*** 2725,2738 ****
+ lp->ll_dict = lp->ll_tv->vval.v_dict;
+ lp->ll_di = dict_find(lp->ll_dict, key, len);
+
+! /* When assigning to g: check that a function and variable name is
+! * valid. */
+! if (rettv != NULL && lp->ll_dict == &globvardict)
+ {
+! if (rettv->v_type == VAR_FUNC
+ && var_check_func_name(key, lp->ll_di == NULL))
+! return NULL;
+! if (!valid_varname(key))
+ return NULL;
+ }
+
+--- 2725,2750 ----
+ lp->ll_dict = lp->ll_tv->vval.v_dict;
+ lp->ll_di = dict_find(lp->ll_dict, key, len);
+
+! /* When assigning to a scope dictionary check that a function and
+! * variable name is valid (only variable name unless it is l: or
+! * g: dictionary). Disallow overwriting a builtin function. */
+! if (rettv != NULL && lp->ll_dict->dv_scope != 0)
+ {
+! int prevval;
+! int wrong;
+!
+! if (len != -1)
+! {
+! prevval = key[len];
+! key[len] = NUL;
+! }
+! wrong = (lp->ll_dict->dv_scope == VAR_DEF_SCOPE
+! && rettv->v_type == VAR_FUNC
+ && var_check_func_name(key, lp->ll_di == NULL))
+! || !valid_varname(key);
+! if (len != -1)
+! key[len] = prevval;
+! if (wrong)
+ return NULL;
+ }
+
+***************
+*** 6951,6957 ****
+ d = (dict_T *)alloc(sizeof(dict_T));
+ if (d != NULL)
+ {
+! /* Add the list to the list of dicts for garbage collection. */
+ if (first_dict != NULL)
+ first_dict->dv_used_prev = d;
+ d->dv_used_next = first_dict;
+--- 6963,6969 ----
+ d = (dict_T *)alloc(sizeof(dict_T));
+ if (d != NULL)
+ {
+! /* Add the dict to the list of dicts for garbage collection. */
+ if (first_dict != NULL)
+ first_dict->dv_used_prev = d;
+ d->dv_used_next = first_dict;
+***************
+*** 6960,6965 ****
+--- 6972,6978 ----
+
+ hash_init(&d->dv_hashtab);
+ d->dv_lock = 0;
++ d->dv_scope = 0;
+ d->dv_refcount = 0;
+ d->dv_copyID = 0;
+ }
+***************
+*** 10203,10208 ****
+--- 10216,10234 ----
+ {
+ --todo;
+ di1 = dict_find(d1, hi2->hi_key, -1);
++ if (d1->dv_scope != 0)
++ {
++ /* Disallow replacing a builtin function in l: and g:.
++ * Check the key to be valid when adding to any
++ * scope. */
++ if (d1->dv_scope == VAR_DEF_SCOPE
++ && HI2DI(hi2)->di_tv.v_type == VAR_FUNC
++ && var_check_func_name(hi2->hi_key,
++ di1 == NULL))
++ break;
++ if (!valid_varname(hi2->hi_key))
++ break;
++ }
+ if (di1 == NULL)
+ {
+ di1 = dictitem_copy(HI2DI(hi2));
+***************
+*** 20027,20033 ****
+ {
+ sv = SCRIPT_SV(ga_scripts.ga_len + 1) =
+ (scriptvar_T *)alloc_clear(sizeof(scriptvar_T));
+! init_var_dict(&sv->sv_dict, &sv->sv_var);
+ ++ga_scripts.ga_len;
+ }
+ }
+--- 20053,20059 ----
+ {
+ sv = SCRIPT_SV(ga_scripts.ga_len + 1) =
+ (scriptvar_T *)alloc_clear(sizeof(scriptvar_T));
+! init_var_dict(&sv->sv_dict, &sv->sv_var, VAR_SCOPE);
+ ++ga_scripts.ga_len;
+ }
+ }
+***************
+*** 20038,20049 ****
+ * point to it.
+ */
+ void
+! init_var_dict(dict, dict_var)
+ dict_T *dict;
+ dictitem_T *dict_var;
+ {
+ hash_init(&dict->dv_hashtab);
+ dict->dv_lock = 0;
+ dict->dv_refcount = DO_NOT_FREE_CNT;
+ dict->dv_copyID = 0;
+ dict_var->di_tv.vval.v_dict = dict;
+--- 20064,20077 ----
+ * point to it.
+ */
+ void
+! init_var_dict(dict, dict_var, scope)
+ dict_T *dict;
+ dictitem_T *dict_var;
++ int scope;
+ {
+ hash_init(&dict->dv_hashtab);
+ dict->dv_lock = 0;
++ dict->dv_scope = scope;
+ dict->dv_refcount = DO_NOT_FREE_CNT;
+ dict->dv_copyID = 0;
+ dict_var->di_tv.vval.v_dict = dict;
+***************
+*** 22304,22310 ****
+ /*
+ * Init l: variables.
+ */
+! init_var_dict(&fc->l_vars, &fc->l_vars_var);
+ if (selfdict != NULL)
+ {
+ /* Set l:self to "selfdict". Use "name" to avoid a warning from
+--- 22332,22338 ----
+ /*
+ * Init l: variables.
+ */
+! init_var_dict(&fc->l_vars, &fc->l_vars_var, VAR_DEF_SCOPE);
+ if (selfdict != NULL)
+ {
+ /* Set l:self to "selfdict". Use "name" to avoid a warning from
+***************
+*** 22325,22331 ****
+ * Set a:0 to "argcount".
+ * Set a:000 to a list with room for the "..." arguments.
+ */
+! init_var_dict(&fc->l_avars, &fc->l_avars_var);
+ add_nr_var(&fc->l_avars, &fc->fixvar[fixvar_idx++].var, "0",
+ (varnumber_T)(argcount - fp->uf_args.ga_len));
+ /* Use "name" to avoid a warning from some compiler that checks the
+--- 22353,22359 ----
+ * Set a:0 to "argcount".
+ * Set a:000 to a list with room for the "..." arguments.
+ */
+! init_var_dict(&fc->l_avars, &fc->l_avars_var, VAR_SCOPE);
+ add_nr_var(&fc->l_avars, &fc->fixvar[fixvar_idx++].var, "0",
+ (varnumber_T)(argcount - fp->uf_args.ga_len));
+ /* Use "name" to avoid a warning from some compiler that checks the
+*** ../vim-7.3.602/src/proto/eval.pro 2012-06-29 12:54:32.000000000 +0200
+--- src/proto/eval.pro 2012-07-16 16:55:16.000000000 +0200
+***************
+*** 93,99 ****
+ char_u *get_tv_string_chk __ARGS((typval_T *varp));
+ char_u *get_var_value __ARGS((char_u *name));
+ void new_script_vars __ARGS((scid_T id));
+! void init_var_dict __ARGS((dict_T *dict, dictitem_T *dict_var));
+ void vars_clear __ARGS((hashtab_T *ht));
+ void copy_tv __ARGS((typval_T *from, typval_T *to));
+ void ex_echo __ARGS((exarg_T *eap));
+--- 93,99 ----
+ char_u *get_tv_string_chk __ARGS((typval_T *varp));
+ char_u *get_var_value __ARGS((char_u *name));
+ void new_script_vars __ARGS((scid_T id));
+! void init_var_dict __ARGS((dict_T *dict, dictitem_T *dict_var, int scope));
+ void vars_clear __ARGS((hashtab_T *ht));
+ void copy_tv __ARGS((typval_T *from, typval_T *to));
+ void ex_echo __ARGS((exarg_T *eap));
+*** ../vim-7.3.602/src/structs.h 2012-06-06 19:02:40.000000000 +0200
+--- src/structs.h 2012-07-16 16:56:43.000000000 +0200
+***************
+*** 1106,1111 ****
+--- 1106,1116 ----
+ #define VAR_DICT 5 /* "v_dict" is used */
+ #define VAR_FLOAT 6 /* "v_float" is used */
+
++ /* Values for "dv_scope". */
++ #define VAR_SCOPE 1 /* a:, v:, s:, etc. scope dictionaries */
++ #define VAR_DEF_SCOPE 2 /* l:, g: scope dictionaries: here funcrefs are not
++ allowed to mask existing functions */
++
+ /* Values for "v_lock". */
+ #define VAR_LOCKED 1 /* locked with lock(), can use unlock() */
+ #define VAR_FIXED 2 /* locked forever */
+***************
+*** 1181,1186 ****
+--- 1186,1192 ----
+ int dv_copyID; /* ID used by deepcopy() */
+ dict_T *dv_copydict; /* copied dict used by deepcopy() */
+ char dv_lock; /* zero, VAR_LOCKED, VAR_FIXED */
++ char dv_scope; /* zero, VAR_SCOPE, VAR_DEF_SCOPE */
+ dict_T *dv_used_next; /* next dict in used dicts list */
+ dict_T *dv_used_prev; /* previous dict in used dicts list */
+ };
+*** ../vim-7.3.602/src/testdir/test34.in 2010-08-15 21:57:29.000000000 +0200
+--- src/testdir/test34.in 2012-07-16 16:51:29.000000000 +0200
+***************
+*** 1,5 ****
+--- 1,6 ----
+ Test for user functions.
+ Also test an <expr> mapping calling a function.
++ Also test that a builtin function cannot be replaced.
+
+ STARTTEST
+ :so small.vim
+***************
+*** 58,64 ****
+ ---*---
+ (one
+ (two
+! [(one again:$-5,$w! test.out
+ :delfunc Table
+ :delfunc Compute
+ :delfunc Expr1
+--- 59,68 ----
+ ---*---
+ (one
+ (two
+! [(one again:call append(line('$'), max([1, 2, 3]))
+! :call extend(g:, {'max': function('min')})
+! :call append(line('$'), max([1, 2, 3]))
+! :$-7,$w! test.out
+ :delfunc Table
+ :delfunc Compute
+ :delfunc Expr1
+*** ../vim-7.3.602/src/testdir/test34.ok 2011-10-12 22:02:07.000000000 +0200
+--- src/testdir/test34.ok 2012-07-16 16:43:15.000000000 +0200
+***************
+*** 4,6 ****
+--- 4,8 ----
+ 1. one
+ 2. two
+ 1. one again
++ 3
++ 3
+*** ../vim-7.3.602/src/window.c 2012-07-06 18:27:34.000000000 +0200
+--- src/window.c 2012-07-16 16:53:45.000000000 +0200
+***************
+*** 3468,3474 ****
+ # endif
+ #ifdef FEAT_EVAL
+ /* init t: variables */
+! init_var_dict(&tp->tp_vars, &tp->tp_winvar);
+ #endif
+ tp->tp_ch_used = p_ch;
+ }
+--- 3468,3474 ----
+ # endif
+ #ifdef FEAT_EVAL
+ /* init t: variables */
+! init_var_dict(&tp->tp_vars, &tp->tp_winvar, VAR_SCOPE);
+ #endif
+ tp->tp_ch_used = p_ch;
+ }
+***************
+*** 4410,4416 ****
+ #endif
+ #ifdef FEAT_EVAL
+ /* init w: variables */
+! init_var_dict(&new_wp->w_vars, &new_wp->w_winvar);
+ #endif
+ #ifdef FEAT_FOLDING
+ foldInitWin(new_wp);
+--- 4410,4416 ----
+ #endif
+ #ifdef FEAT_EVAL
+ /* init w: variables */
+! init_var_dict(&new_wp->w_vars, &new_wp->w_winvar, VAR_SCOPE);
+ #endif
+ #ifdef FEAT_FOLDING
+ foldInitWin(new_wp);
+*** ../vim-7.3.602/src/version.c 2012-07-16 17:27:57.000000000 +0200
+--- src/version.c 2012-07-16 17:29:06.000000000 +0200
+***************
+*** 716,717 ****
+--- 716,719 ----
+ { /* Add new patch number below this line */
++ /**/
++ 603,
+ /**/
+
+--
+Birthdays are healthy. The more you have them, the longer you live.
+
+ /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net \\\
+/// sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
+\\\ an exciting new programming language -- http://www.Zimbu.org ///
+ \\\ help me help AIDS victims -- http://ICCF-Holland.org ///