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Copy patheval.c
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10201 lines (9323 loc) · 228 KB
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/* vi:set ts=8 sts=4 sw=4 noet:
*
* 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.
*/
/*
* eval.c: Expression evaluation.
*/
#define USING_FLOAT_STUFF
#include "vim.h"
#if defined(FEAT_EVAL) || defined(PROTO)
#ifdef VMS
# include <float.h>
#endif
#define DICT_MAXNEST 100 /* maximum nesting of lists and dicts */
static char *e_letunexp = N_("E18: Unexpected characters in :let");
static char *e_undefvar = N_("E121: Undefined variable: %s");
static char *e_missbrac = N_("E111: Missing ']'");
static char *e_dictrange = N_("E719: Cannot use [:] with a Dictionary");
static char *e_letwrong = N_("E734: Wrong variable type for %s=");
static char *e_illvar = N_("E461: Illegal variable name: %s");
#ifdef FEAT_FLOAT
static char *e_float_as_string = N_("E806: using Float as a String");
#endif
#define NAMESPACE_CHAR (char_u *)"abglstvw"
static dictitem_T globvars_var; /* variable used for g: */
#define globvarht globvardict.dv_hashtab
/*
* Old Vim variables such as "v:version" are also available without the "v:".
* Also in functions. We need a special hashtable for them.
*/
static hashtab_T compat_hashtab;
/*
* When recursively copying lists and dicts we need to remember which ones we
* have done to avoid endless recursiveness. This unique ID is used for that.
* The last bit is used for previous_funccal, ignored when comparing.
*/
static int current_copyID = 0;
/*
* Array to hold the hashtab with variables local to each sourced script.
* Each item holds a variable (nameless) that points to the dict_T.
*/
typedef struct
{
dictitem_T sv_var;
dict_T sv_dict;
} scriptvar_T;
static garray_T ga_scripts = {0, 0, sizeof(scriptvar_T *), 4, NULL};
#define SCRIPT_SV(id) (((scriptvar_T **)ga_scripts.ga_data)[(id) - 1])
#define SCRIPT_VARS(id) (SCRIPT_SV(id)->sv_dict.dv_hashtab)
static int echo_attr = 0; /* attributes used for ":echo" */
/* The names of packages that once were loaded are remembered. */
static garray_T ga_loaded = {0, 0, sizeof(char_u *), 4, NULL};
/*
* Info used by a ":for" loop.
*/
typedef struct
{
int fi_semicolon; /* TRUE if ending in '; var]' */
int fi_varcount; /* nr of variables in the list */
listwatch_T fi_lw; /* keep an eye on the item used. */
list_T *fi_list; /* list being used */
} forinfo_T;
/*
* Array to hold the value of v: variables.
* The value is in a dictitem, so that it can also be used in the v: scope.
* The reason to use this table anyway is for very quick access to the
* variables with the VV_ defines.
*/
/* values for vv_flags: */
#define VV_COMPAT 1 /* compatible, also used without "v:" */
#define VV_RO 2 /* read-only */
#define VV_RO_SBX 4 /* read-only in the sandbox */
#define VV_NAME(s, t) s, {{t, 0, {0}}, 0, {0}}
static struct vimvar
{
char *vv_name; /* name of variable, without v: */
dictitem16_T vv_di; /* value and name for key (max 16 chars!) */
char vv_flags; /* VV_COMPAT, VV_RO, VV_RO_SBX */
} vimvars[VV_LEN] =
{
/*
* The order here must match the VV_ defines in vim.h!
* Initializing a union does not work, leave tv.vval empty to get zero's.
*/
{VV_NAME("count", VAR_NUMBER), VV_COMPAT+VV_RO},
{VV_NAME("count1", VAR_NUMBER), VV_RO},
{VV_NAME("prevcount", VAR_NUMBER), VV_RO},
{VV_NAME("errmsg", VAR_STRING), VV_COMPAT},
{VV_NAME("warningmsg", VAR_STRING), 0},
{VV_NAME("statusmsg", VAR_STRING), 0},
{VV_NAME("shell_error", VAR_NUMBER), VV_COMPAT+VV_RO},
{VV_NAME("this_session", VAR_STRING), VV_COMPAT},
{VV_NAME("version", VAR_NUMBER), VV_COMPAT+VV_RO},
{VV_NAME("lnum", VAR_NUMBER), VV_RO_SBX},
{VV_NAME("termresponse", VAR_STRING), VV_RO},
{VV_NAME("fname", VAR_STRING), VV_RO},
{VV_NAME("lang", VAR_STRING), VV_RO},
{VV_NAME("lc_time", VAR_STRING), VV_RO},
{VV_NAME("ctype", VAR_STRING), VV_RO},
{VV_NAME("charconvert_from", VAR_STRING), VV_RO},
{VV_NAME("charconvert_to", VAR_STRING), VV_RO},
{VV_NAME("fname_in", VAR_STRING), VV_RO},
{VV_NAME("fname_out", VAR_STRING), VV_RO},
{VV_NAME("fname_new", VAR_STRING), VV_RO},
{VV_NAME("fname_diff", VAR_STRING), VV_RO},
{VV_NAME("cmdarg", VAR_STRING), VV_RO},
{VV_NAME("foldstart", VAR_NUMBER), VV_RO_SBX},
{VV_NAME("foldend", VAR_NUMBER), VV_RO_SBX},
{VV_NAME("folddashes", VAR_STRING), VV_RO_SBX},
{VV_NAME("foldlevel", VAR_NUMBER), VV_RO_SBX},
{VV_NAME("progname", VAR_STRING), VV_RO},
{VV_NAME("servername", VAR_STRING), VV_RO},
{VV_NAME("dying", VAR_NUMBER), VV_RO},
{VV_NAME("exception", VAR_STRING), VV_RO},
{VV_NAME("throwpoint", VAR_STRING), VV_RO},
{VV_NAME("register", VAR_STRING), VV_RO},
{VV_NAME("cmdbang", VAR_NUMBER), VV_RO},
{VV_NAME("insertmode", VAR_STRING), VV_RO},
{VV_NAME("val", VAR_UNKNOWN), VV_RO},
{VV_NAME("key", VAR_UNKNOWN), VV_RO},
{VV_NAME("profiling", VAR_NUMBER), VV_RO},
{VV_NAME("fcs_reason", VAR_STRING), VV_RO},
{VV_NAME("fcs_choice", VAR_STRING), 0},
{VV_NAME("beval_bufnr", VAR_NUMBER), VV_RO},
{VV_NAME("beval_winnr", VAR_NUMBER), VV_RO},
{VV_NAME("beval_winid", VAR_NUMBER), VV_RO},
{VV_NAME("beval_lnum", VAR_NUMBER), VV_RO},
{VV_NAME("beval_col", VAR_NUMBER), VV_RO},
{VV_NAME("beval_text", VAR_STRING), VV_RO},
{VV_NAME("scrollstart", VAR_STRING), 0},
{VV_NAME("swapname", VAR_STRING), VV_RO},
{VV_NAME("swapchoice", VAR_STRING), 0},
{VV_NAME("swapcommand", VAR_STRING), VV_RO},
{VV_NAME("char", VAR_STRING), 0},
{VV_NAME("mouse_win", VAR_NUMBER), 0},
{VV_NAME("mouse_winid", VAR_NUMBER), 0},
{VV_NAME("mouse_lnum", VAR_NUMBER), 0},
{VV_NAME("mouse_col", VAR_NUMBER), 0},
{VV_NAME("operator", VAR_STRING), VV_RO},
{VV_NAME("searchforward", VAR_NUMBER), 0},
{VV_NAME("hlsearch", VAR_NUMBER), 0},
{VV_NAME("oldfiles", VAR_LIST), 0},
{VV_NAME("windowid", VAR_NUMBER), VV_RO},
{VV_NAME("progpath", VAR_STRING), VV_RO},
{VV_NAME("completed_item", VAR_DICT), VV_RO},
{VV_NAME("option_new", VAR_STRING), VV_RO},
{VV_NAME("option_old", VAR_STRING), VV_RO},
{VV_NAME("option_type", VAR_STRING), VV_RO},
{VV_NAME("errors", VAR_LIST), 0},
{VV_NAME("false", VAR_SPECIAL), VV_RO},
{VV_NAME("true", VAR_SPECIAL), VV_RO},
{VV_NAME("null", VAR_SPECIAL), VV_RO},
{VV_NAME("none", VAR_SPECIAL), VV_RO},
{VV_NAME("vim_did_enter", VAR_NUMBER), VV_RO},
{VV_NAME("testing", VAR_NUMBER), 0},
{VV_NAME("t_number", VAR_NUMBER), VV_RO},
{VV_NAME("t_string", VAR_NUMBER), VV_RO},
{VV_NAME("t_func", VAR_NUMBER), VV_RO},
{VV_NAME("t_list", VAR_NUMBER), VV_RO},
{VV_NAME("t_dict", VAR_NUMBER), VV_RO},
{VV_NAME("t_float", VAR_NUMBER), VV_RO},
{VV_NAME("t_bool", VAR_NUMBER), VV_RO},
{VV_NAME("t_none", VAR_NUMBER), VV_RO},
{VV_NAME("t_job", VAR_NUMBER), VV_RO},
{VV_NAME("t_channel", VAR_NUMBER), VV_RO},
};
/* shorthand */
#define vv_type vv_di.di_tv.v_type
#define vv_nr vv_di.di_tv.vval.v_number
#define vv_float vv_di.di_tv.vval.v_float
#define vv_str vv_di.di_tv.vval.v_string
#define vv_list vv_di.di_tv.vval.v_list
#define vv_dict vv_di.di_tv.vval.v_dict
#define vv_tv vv_di.di_tv
static dictitem_T vimvars_var; /* variable used for v: */
#define vimvarht vimvardict.dv_hashtab
static int ex_let_vars(char_u *arg, typval_T *tv, int copy, int semicolon, int var_count, char_u *nextchars);
static char_u *skip_var_list(char_u *arg, int *var_count, int *semicolon);
static char_u *skip_var_one(char_u *arg);
static void list_glob_vars(int *first);
static void list_buf_vars(int *first);
static void list_win_vars(int *first);
#ifdef FEAT_WINDOWS
static void list_tab_vars(int *first);
#endif
static void list_vim_vars(int *first);
static void list_script_vars(int *first);
static char_u *list_arg_vars(exarg_T *eap, char_u *arg, int *first);
static char_u *ex_let_one(char_u *arg, typval_T *tv, int copy, char_u *endchars, char_u *op);
static void set_var_lval(lval_T *lp, char_u *endp, typval_T *rettv, int copy, char_u *op);
static int tv_op(typval_T *tv1, typval_T *tv2, char_u *op);
static void ex_unletlock(exarg_T *eap, char_u *argstart, int deep);
static int do_unlet_var(lval_T *lp, char_u *name_end, int forceit);
static int do_lock_var(lval_T *lp, char_u *name_end, int deep, int lock);
static void item_lock(typval_T *tv, int deep, int lock);
static int eval2(char_u **arg, typval_T *rettv, int evaluate);
static int eval3(char_u **arg, typval_T *rettv, int evaluate);
static int eval4(char_u **arg, typval_T *rettv, int evaluate);
static int eval5(char_u **arg, typval_T *rettv, int evaluate);
static int eval6(char_u **arg, typval_T *rettv, int evaluate, int want_string);
static int eval7(char_u **arg, typval_T *rettv, int evaluate, int want_string);
static int eval_index(char_u **arg, typval_T *rettv, int evaluate, int verbose);
static int get_string_tv(char_u **arg, typval_T *rettv, int evaluate);
static int get_lit_string_tv(char_u **arg, typval_T *rettv, int evaluate);
static int free_unref_items(int copyID);
static int get_env_tv(char_u **arg, typval_T *rettv, int evaluate);
static int get_env_len(char_u **arg);
static char_u * make_expanded_name(char_u *in_start, char_u *expr_start, char_u *expr_end, char_u *in_end);
static void check_vars(char_u *name, int len);
static typval_T *alloc_string_tv(char_u *string);
static void delete_var(hashtab_T *ht, hashitem_T *hi);
static void list_one_var(dictitem_T *v, char_u *prefix, int *first);
static void list_one_var_a(char_u *prefix, char_u *name, int type, char_u *string, int *first);
static char_u *find_option_end(char_u **arg, int *opt_flags);
/* for VIM_VERSION_ defines */
#include "version.h"
#if defined(EBCDIC) || defined(PROTO)
/*
* Compare struct fst by function name.
*/
static int
compare_func_name(const void *s1, const void *s2)
{
struct fst *p1 = (struct fst *)s1;
struct fst *p2 = (struct fst *)s2;
return STRCMP(p1->f_name, p2->f_name);
}
/*
* Sort the function table by function name.
* The sorting of the table above is ASCII dependant.
* On machines using EBCDIC we have to sort it.
*/
static void
sortFunctions(void)
{
int funcCnt = (int)(sizeof(functions) / sizeof(struct fst)) - 1;
qsort(functions, (size_t)funcCnt, sizeof(struct fst), compare_func_name);
}
#endif
/*
* Initialize the global and v: variables.
*/
void
eval_init(void)
{
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);
func_init();
for (i = 0; i < VV_LEN; ++i)
{
p = &vimvars[i];
if (STRLEN(p->vv_name) > 16)
{
IEMSG("INTERNAL: name too long, increase size of dictitem16_T");
getout(1);
}
STRCPY(p->vv_di.di_key, p->vv_name);
if (p->vv_flags & VV_RO)
p->vv_di.di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
else if (p->vv_flags & VV_RO_SBX)
p->vv_di.di_flags = DI_FLAGS_RO_SBX | DI_FLAGS_FIX;
else
p->vv_di.di_flags = DI_FLAGS_FIX;
/* add to v: scope dict, unless the value is not always available */
if (p->vv_type != VAR_UNKNOWN)
hash_add(&vimvarht, p->vv_di.di_key);
if (p->vv_flags & VV_COMPAT)
/* add to compat scope dict */
hash_add(&compat_hashtab, p->vv_di.di_key);
}
vimvars[VV_VERSION].vv_nr = VIM_VERSION_100;
set_vim_var_nr(VV_SEARCHFORWARD, 1L);
set_vim_var_nr(VV_HLSEARCH, 1L);
set_vim_var_dict(VV_COMPLETED_ITEM, dict_alloc());
set_vim_var_list(VV_ERRORS, list_alloc());
set_vim_var_nr(VV_FALSE, VVAL_FALSE);
set_vim_var_nr(VV_TRUE, VVAL_TRUE);
set_vim_var_nr(VV_NONE, VVAL_NONE);
set_vim_var_nr(VV_NULL, VVAL_NULL);
set_vim_var_nr(VV_TYPE_NUMBER, VAR_TYPE_NUMBER);
set_vim_var_nr(VV_TYPE_STRING, VAR_TYPE_STRING);
set_vim_var_nr(VV_TYPE_FUNC, VAR_TYPE_FUNC);
set_vim_var_nr(VV_TYPE_LIST, VAR_TYPE_LIST);
set_vim_var_nr(VV_TYPE_DICT, VAR_TYPE_DICT);
set_vim_var_nr(VV_TYPE_FLOAT, VAR_TYPE_FLOAT);
set_vim_var_nr(VV_TYPE_BOOL, VAR_TYPE_BOOL);
set_vim_var_nr(VV_TYPE_NONE, VAR_TYPE_NONE);
set_vim_var_nr(VV_TYPE_JOB, VAR_TYPE_JOB);
set_vim_var_nr(VV_TYPE_CHANNEL, VAR_TYPE_CHANNEL);
set_reg_var(0); /* default for v:register is not 0 but '"' */
#ifdef EBCDIC
/*
* Sort the function table, to enable binary search.
*/
sortFunctions();
#endif
}
#if defined(EXITFREE) || defined(PROTO)
void
eval_clear(void)
{
int i;
struct vimvar *p;
for (i = 0; i < VV_LEN; ++i)
{
p = &vimvars[i];
if (p->vv_di.di_tv.v_type == VAR_STRING)
{
vim_free(p->vv_str);
p->vv_str = NULL;
}
else if (p->vv_di.di_tv.v_type == VAR_LIST)
{
list_unref(p->vv_list);
p->vv_list = NULL;
}
}
hash_clear(&vimvarht);
hash_init(&vimvarht); /* garbage_collect() will access it */
hash_clear(&compat_hashtab);
free_scriptnames();
# if defined(FEAT_CMDL_COMPL)
free_locales();
# endif
/* global variables */
vars_clear(&globvarht);
/* autoloaded script names */
ga_clear_strings(&ga_loaded);
/* Script-local variables. First clear all the variables and in a second
* loop free the scriptvar_T, because a variable in one script might hold
* a reference to the whole scope of another script. */
for (i = 1; i <= ga_scripts.ga_len; ++i)
vars_clear(&SCRIPT_VARS(i));
for (i = 1; i <= ga_scripts.ga_len; ++i)
vim_free(SCRIPT_SV(i));
ga_clear(&ga_scripts);
/* unreferenced lists and dicts */
(void)garbage_collect(FALSE);
/* functions */
free_all_functions();
}
#endif
/*
* Set an internal variable to a string value. Creates the variable if it does
* not already exist.
*/
void
set_internal_string_var(char_u *name, char_u *value)
{
char_u *val;
typval_T *tvp;
val = vim_strsave(value);
if (val != NULL)
{
tvp = alloc_string_tv(val);
if (tvp != NULL)
{
set_var(name, tvp, FALSE);
free_tv(tvp);
}
}
}
static lval_T *redir_lval = NULL;
#define EVALCMD_BUSY (redir_lval == (lval_T *)&redir_lval)
static garray_T redir_ga; /* only valid when redir_lval is not NULL */
static char_u *redir_endp = NULL;
static char_u *redir_varname = NULL;
/*
* Start recording command output to a variable
* When "append" is TRUE append to an existing variable.
* Returns OK if successfully completed the setup. FAIL otherwise.
*/
int
var_redir_start(char_u *name, int append)
{
int save_emsg;
int err;
typval_T tv;
/* Catch a bad name early. */
if (!eval_isnamec1(*name))
{
EMSG(_(e_invarg));
return FAIL;
}
/* Make a copy of the name, it is used in redir_lval until redir ends. */
redir_varname = vim_strsave(name);
if (redir_varname == NULL)
return FAIL;
redir_lval = (lval_T *)alloc_clear((unsigned)sizeof(lval_T));
if (redir_lval == NULL)
{
var_redir_stop();
return FAIL;
}
/* The output is stored in growarray "redir_ga" until redirection ends. */
ga_init2(&redir_ga, (int)sizeof(char), 500);
/* Parse the variable name (can be a dict or list entry). */
redir_endp = get_lval(redir_varname, NULL, redir_lval, FALSE, FALSE, 0,
FNE_CHECK_START);
if (redir_endp == NULL || redir_lval->ll_name == NULL || *redir_endp != NUL)
{
clear_lval(redir_lval);
if (redir_endp != NULL && *redir_endp != NUL)
/* Trailing characters are present after the variable name */
EMSG(_(e_trailing));
else
EMSG(_(e_invarg));
redir_endp = NULL; /* don't store a value, only cleanup */
var_redir_stop();
return FAIL;
}
/* check if we can write to the variable: set it to or append an empty
* string */
save_emsg = did_emsg;
did_emsg = FALSE;
tv.v_type = VAR_STRING;
tv.vval.v_string = (char_u *)"";
if (append)
set_var_lval(redir_lval, redir_endp, &tv, TRUE, (char_u *)".");
else
set_var_lval(redir_lval, redir_endp, &tv, TRUE, (char_u *)"=");
clear_lval(redir_lval);
err = did_emsg;
did_emsg |= save_emsg;
if (err)
{
redir_endp = NULL; /* don't store a value, only cleanup */
var_redir_stop();
return FAIL;
}
return OK;
}
/*
* Append "value[value_len]" to the variable set by var_redir_start().
* The actual appending is postponed until redirection ends, because the value
* appended may in fact be the string we write to, changing it may cause freed
* memory to be used:
* :redir => foo
* :let foo
* :redir END
*/
void
var_redir_str(char_u *value, int value_len)
{
int len;
if (redir_lval == NULL)
return;
if (value_len == -1)
len = (int)STRLEN(value); /* Append the entire string */
else
len = value_len; /* Append only "value_len" characters */
if (ga_grow(&redir_ga, len) == OK)
{
mch_memmove((char *)redir_ga.ga_data + redir_ga.ga_len, value, len);
redir_ga.ga_len += len;
}
else
var_redir_stop();
}
/*
* Stop redirecting command output to a variable.
* Frees the allocated memory.
*/
void
var_redir_stop(void)
{
typval_T tv;
if (EVALCMD_BUSY)
{
redir_lval = NULL;
return;
}
if (redir_lval != NULL)
{
/* If there was no error: assign the text to the variable. */
if (redir_endp != NULL)
{
ga_append(&redir_ga, NUL); /* Append the trailing NUL. */
tv.v_type = VAR_STRING;
tv.vval.v_string = redir_ga.ga_data;
/* Call get_lval() again, if it's inside a Dict or List it may
* have changed. */
redir_endp = get_lval(redir_varname, NULL, redir_lval,
FALSE, FALSE, 0, FNE_CHECK_START);
if (redir_endp != NULL && redir_lval->ll_name != NULL)
set_var_lval(redir_lval, redir_endp, &tv, FALSE, (char_u *)".");
clear_lval(redir_lval);
}
/* free the collected output */
vim_free(redir_ga.ga_data);
redir_ga.ga_data = NULL;
vim_free(redir_lval);
redir_lval = NULL;
}
vim_free(redir_varname);
redir_varname = NULL;
}
# if defined(FEAT_MBYTE) || defined(PROTO)
int
eval_charconvert(
char_u *enc_from,
char_u *enc_to,
char_u *fname_from,
char_u *fname_to)
{
int err = FALSE;
set_vim_var_string(VV_CC_FROM, enc_from, -1);
set_vim_var_string(VV_CC_TO, enc_to, -1);
set_vim_var_string(VV_FNAME_IN, fname_from, -1);
set_vim_var_string(VV_FNAME_OUT, fname_to, -1);
if (eval_to_bool(p_ccv, &err, NULL, FALSE))
err = TRUE;
set_vim_var_string(VV_CC_FROM, NULL, -1);
set_vim_var_string(VV_CC_TO, NULL, -1);
set_vim_var_string(VV_FNAME_IN, NULL, -1);
set_vim_var_string(VV_FNAME_OUT, NULL, -1);
if (err)
return FAIL;
return OK;
}
# endif
# if defined(FEAT_POSTSCRIPT) || defined(PROTO)
int
eval_printexpr(char_u *fname, char_u *args)
{
int err = FALSE;
set_vim_var_string(VV_FNAME_IN, fname, -1);
set_vim_var_string(VV_CMDARG, args, -1);
if (eval_to_bool(p_pexpr, &err, NULL, FALSE))
err = TRUE;
set_vim_var_string(VV_FNAME_IN, NULL, -1);
set_vim_var_string(VV_CMDARG, NULL, -1);
if (err)
{
mch_remove(fname);
return FAIL;
}
return OK;
}
# endif
# if defined(FEAT_DIFF) || defined(PROTO)
void
eval_diff(
char_u *origfile,
char_u *newfile,
char_u *outfile)
{
int err = FALSE;
set_vim_var_string(VV_FNAME_IN, origfile, -1);
set_vim_var_string(VV_FNAME_NEW, newfile, -1);
set_vim_var_string(VV_FNAME_OUT, outfile, -1);
(void)eval_to_bool(p_dex, &err, NULL, FALSE);
set_vim_var_string(VV_FNAME_IN, NULL, -1);
set_vim_var_string(VV_FNAME_NEW, NULL, -1);
set_vim_var_string(VV_FNAME_OUT, NULL, -1);
}
void
eval_patch(
char_u *origfile,
char_u *difffile,
char_u *outfile)
{
int err;
set_vim_var_string(VV_FNAME_IN, origfile, -1);
set_vim_var_string(VV_FNAME_DIFF, difffile, -1);
set_vim_var_string(VV_FNAME_OUT, outfile, -1);
(void)eval_to_bool(p_pex, &err, NULL, FALSE);
set_vim_var_string(VV_FNAME_IN, NULL, -1);
set_vim_var_string(VV_FNAME_DIFF, NULL, -1);
set_vim_var_string(VV_FNAME_OUT, NULL, -1);
}
# endif
/*
* Top level evaluation function, returning a boolean.
* Sets "error" to TRUE if there was an error.
* Return TRUE or FALSE.
*/
int
eval_to_bool(
char_u *arg,
int *error,
char_u **nextcmd,
int skip) /* only parse, don't execute */
{
typval_T tv;
varnumber_T retval = FALSE;
if (skip)
++emsg_skip;
if (eval0(arg, &tv, nextcmd, !skip) == FAIL)
*error = TRUE;
else
{
*error = FALSE;
if (!skip)
{
retval = (get_tv_number_chk(&tv, error) != 0);
clear_tv(&tv);
}
}
if (skip)
--emsg_skip;
return (int)retval;
}
/*
* Top level evaluation function, returning a string. If "skip" is TRUE,
* only parsing to "nextcmd" is done, without reporting errors. Return
* pointer to allocated memory, or NULL for failure or when "skip" is TRUE.
*/
char_u *
eval_to_string_skip(
char_u *arg,
char_u **nextcmd,
int skip) /* only parse, don't execute */
{
typval_T tv;
char_u *retval;
if (skip)
++emsg_skip;
if (eval0(arg, &tv, nextcmd, !skip) == FAIL || skip)
retval = NULL;
else
{
retval = vim_strsave(get_tv_string(&tv));
clear_tv(&tv);
}
if (skip)
--emsg_skip;
return retval;
}
/*
* Skip over an expression at "*pp".
* Return FAIL for an error, OK otherwise.
*/
int
skip_expr(char_u **pp)
{
typval_T rettv;
*pp = skipwhite(*pp);
return eval1(pp, &rettv, FALSE);
}
/*
* Top level evaluation function, returning a string.
* When "convert" is TRUE convert a List into a sequence of lines and convert
* a Float to a String.
* Return pointer to allocated memory, or NULL for failure.
*/
char_u *
eval_to_string(
char_u *arg,
char_u **nextcmd,
int convert)
{
typval_T tv;
char_u *retval;
garray_T ga;
#ifdef FEAT_FLOAT
char_u numbuf[NUMBUFLEN];
#endif
if (eval0(arg, &tv, nextcmd, TRUE) == FAIL)
retval = NULL;
else
{
if (convert && tv.v_type == VAR_LIST)
{
ga_init2(&ga, (int)sizeof(char), 80);
if (tv.vval.v_list != NULL)
{
list_join(&ga, tv.vval.v_list, (char_u *)"\n", TRUE, FALSE, 0);
if (tv.vval.v_list->lv_len > 0)
ga_append(&ga, NL);
}
ga_append(&ga, NUL);
retval = (char_u *)ga.ga_data;
}
#ifdef FEAT_FLOAT
else if (convert && tv.v_type == VAR_FLOAT)
{
vim_snprintf((char *)numbuf, NUMBUFLEN, "%g", tv.vval.v_float);
retval = vim_strsave(numbuf);
}
#endif
else
retval = vim_strsave(get_tv_string(&tv));
clear_tv(&tv);
}
return retval;
}
/*
* Call eval_to_string() without using current local variables and using
* textlock. When "use_sandbox" is TRUE use the sandbox.
*/
char_u *
eval_to_string_safe(
char_u *arg,
char_u **nextcmd,
int use_sandbox)
{
char_u *retval;
void *save_funccalp;
save_funccalp = save_funccal();
if (use_sandbox)
++sandbox;
++textlock;
retval = eval_to_string(arg, nextcmd, FALSE);
if (use_sandbox)
--sandbox;
--textlock;
restore_funccal(save_funccalp);
return retval;
}
/*
* Top level evaluation function, returning a number.
* Evaluates "expr" silently.
* Returns -1 for an error.
*/
varnumber_T
eval_to_number(char_u *expr)
{
typval_T rettv;
varnumber_T retval;
char_u *p = skipwhite(expr);
++emsg_off;
if (eval1(&p, &rettv, TRUE) == FAIL)
retval = -1;
else
{
retval = get_tv_number_chk(&rettv, NULL);
clear_tv(&rettv);
}
--emsg_off;
return retval;
}
/*
* Prepare v: variable "idx" to be used.
* Save the current typeval in "save_tv".
* When not used yet add the variable to the v: hashtable.
*/
static void
prepare_vimvar(int idx, typval_T *save_tv)
{
*save_tv = vimvars[idx].vv_tv;
if (vimvars[idx].vv_type == VAR_UNKNOWN)
hash_add(&vimvarht, vimvars[idx].vv_di.di_key);
}
/*
* Restore v: variable "idx" to typeval "save_tv".
* When no longer defined, remove the variable from the v: hashtable.
*/
static void
restore_vimvar(int idx, typval_T *save_tv)
{
hashitem_T *hi;
vimvars[idx].vv_tv = *save_tv;
if (vimvars[idx].vv_type == VAR_UNKNOWN)
{
hi = hash_find(&vimvarht, vimvars[idx].vv_di.di_key);
if (HASHITEM_EMPTY(hi))
internal_error("restore_vimvar()");
else
hash_remove(&vimvarht, hi);
}
}
#if defined(FEAT_SPELL) || defined(PROTO)
/*
* Evaluate an expression to a list with suggestions.
* For the "expr:" part of 'spellsuggest'.
* Returns NULL when there is an error.
*/
list_T *
eval_spell_expr(char_u *badword, char_u *expr)
{
typval_T save_val;
typval_T rettv;
list_T *list = NULL;
char_u *p = skipwhite(expr);
/* Set "v:val" to the bad word. */
prepare_vimvar(VV_VAL, &save_val);
vimvars[VV_VAL].vv_type = VAR_STRING;
vimvars[VV_VAL].vv_str = badword;
if (p_verbose == 0)
++emsg_off;
if (eval1(&p, &rettv, TRUE) == OK)
{
if (rettv.v_type != VAR_LIST)
clear_tv(&rettv);
else
list = rettv.vval.v_list;
}
if (p_verbose == 0)
--emsg_off;
restore_vimvar(VV_VAL, &save_val);
return list;
}
/*
* "list" is supposed to contain two items: a word and a number. Return the
* word in "pp" and the number as the return value.
* Return -1 if anything isn't right.
* Used to get the good word and score from the eval_spell_expr() result.
*/
int
get_spellword(list_T *list, char_u **pp)
{
listitem_T *li;
li = list->lv_first;
if (li == NULL)
return -1;
*pp = get_tv_string(&li->li_tv);
li = li->li_next;
if (li == NULL)
return -1;
return (int)get_tv_number(&li->li_tv);
}
#endif
/*
* Top level evaluation function.
* Returns an allocated typval_T with the result.
* Returns NULL when there is an error.
*/
typval_T *
eval_expr(char_u *arg, char_u **nextcmd)
{
typval_T *tv;
tv = (typval_T *)alloc(sizeof(typval_T));
if (tv != NULL && eval0(arg, tv, nextcmd, TRUE) == FAIL)
{
vim_free(tv);
tv = NULL;
}
return tv;
}
/*
* Call some Vim script function and return the result in "*rettv".
* Uses argv[argc] for the function arguments. Only Number and String
* arguments are currently supported.
* Returns OK or FAIL.
*/
int
call_vim_function(
char_u *func,
int argc,
char_u **argv,
int safe, /* use the sandbox */
int str_arg_only, /* all arguments are strings */
typval_T *rettv)
{
typval_T *argvars;
varnumber_T n;
int len;
int i;
int doesrange;
void *save_funccalp = NULL;
int ret;
argvars = (typval_T *)alloc((unsigned)((argc + 1) * sizeof(typval_T)));
if (argvars == NULL)
return FAIL;
for (i = 0; i < argc; i++)
{
/* Pass a NULL or empty argument as an empty string */
if (argv[i] == NULL || *argv[i] == NUL)
{
argvars[i].v_type = VAR_STRING;
argvars[i].vval.v_string = (char_u *)"";
continue;
}
if (str_arg_only)
len = 0;
else
/* Recognize a number argument, the others must be strings. */
vim_str2nr(argv[i], NULL, &len, STR2NR_ALL, &n, NULL, 0);
if (len != 0 && len == (int)STRLEN(argv[i]))
{
argvars[i].v_type = VAR_NUMBER;
argvars[i].vval.v_number = n;
}
else
{