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patch 8.2.3689: ex_let_one() is too long

Browse Source 
Problem:    ex_let_one() is too long.
Solution:   Split into multiple functions.
This commit is contained in:
Bram Moolenaar
2021-11-28 19:53:42 +00:00
parent 2e0f3ecb70
commit 3ccb579516
2 changed files with 251 additions and 195 deletions
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444
src/evalvars.c
View File

@@ -1288,6 +1288,240 @@ list_arg_vars(exarg_T *eap, char_u *arg, int *first)
return arg;
}
/*
* Set an environment variable, part of ex_let_one().
*/
static char_u *
ex_let_env(
char_u *arg,
typval_T *tv,
int flags,
char_u *endchars,
char_u *op)
{
char_u *arg_end = NULL;
char_u *name;
int len;
if ((flags & (ASSIGN_CONST | ASSIGN_FINAL))
&& (flags & ASSIGN_FOR_LOOP) == 0)
{
emsg(_("E996: Cannot lock an environment variable"));
return NULL;
}
// Find the end of the name.
++arg;
name = arg;
len = get_env_len(&arg);
if (len == 0)
semsg(_(e_invarg2), name - 1);
else
{
if (op != NULL && vim_strchr((char_u *)"+-*/%", *op) != NULL)
semsg(_(e_letwrong), op);
else if (endchars != NULL
&& vim_strchr(endchars, *skipwhite(arg)) == NULL)
emsg(_(e_unexpected_characters_in_let));
else if (!check_secure())
{
char_u *tofree = NULL;
int c1 = name[len];
char_u *p;
name[len] = NUL;
p = tv_get_string_chk(tv);
if (p != NULL && op != NULL && *op == '.')
{
int mustfree = FALSE;
char_u *s = vim_getenv(name, &mustfree);
if (s != NULL)
{
p = tofree = concat_str(s, p);
if (mustfree)
vim_free(s);
}
}
if (p != NULL)
{
vim_setenv_ext(name, p);
arg_end = arg;
}
name[len] = c1;
vim_free(tofree);
}
}
return arg_end;
}
/*
* Set an option, part of ex_let_one().
*/
static char_u *
ex_let_option(
char_u *arg,
typval_T *tv,
int flags,
char_u *endchars,
char_u *op)
{
char_u *p;
int opt_flags;
char_u *arg_end = NULL;
if ((flags & (ASSIGN_CONST | ASSIGN_FINAL))
&& (flags & ASSIGN_FOR_LOOP) == 0)
{
emsg(_(e_const_option));
return NULL;
}
// Find the end of the name.
p = find_option_end(&arg, &opt_flags);
if (p == NULL || (endchars != NULL
&& vim_strchr(endchars, *skipwhite(p)) == NULL))
emsg(_(e_unexpected_characters_in_let));
else
{
int c1;
long n = 0;
getoption_T opt_type;
long numval;
char_u *stringval = NULL;
char_u *s = NULL;
int failed = FALSE;
c1 = *p;
*p = NUL;
opt_type = get_option_value(arg, &numval, &stringval, opt_flags);
if ((opt_type == gov_bool
|| opt_type == gov_number
|| opt_type == gov_hidden_bool
|| opt_type == gov_hidden_number)
&& (tv->v_type != VAR_STRING || !in_vim9script()))
{
if (opt_type == gov_bool || opt_type == gov_hidden_bool)
// bool, possibly hidden
n = (long)tv_get_bool(tv);
else
// number, possibly hidden
n = (long)tv_get_number(tv);
}
// Avoid setting a string option to the text "v:false" or similar.
// In Vim9 script also don't convert a number to string.
if (tv->v_type != VAR_BOOL && tv->v_type != VAR_SPECIAL
&& (!in_vim9script() || tv->v_type != VAR_NUMBER))
s = tv_get_string_chk(tv);
if (op != NULL && *op != '=')
{
if (((opt_type == gov_bool || opt_type == gov_number) && *op == '.')
|| (opt_type == gov_string && *op != '.'))
{
semsg(_(e_letwrong), op);
failed = TRUE; // don't set the value
}
else
{
// number, in legacy script also bool
if (opt_type == gov_number
|| (opt_type == gov_bool && !in_vim9script()))
{
switch (*op)
{
case '+': n = numval + n; break;
case '-': n = numval - n; break;
case '*': n = numval * n; break;
case '/': n = (long)num_divide(numval, n,
&failed); break;
case '%': n = (long)num_modulus(numval, n,
&failed); break;
}
s = NULL;
}
else if (opt_type == gov_string
&& stringval != NULL && s != NULL)
{
// string
s = concat_str(stringval, s);
vim_free(stringval);
stringval = s;
}
}
}
if (!failed)
{
if (opt_type != gov_string || s != NULL)
{
set_option_value(arg, n, s, opt_flags);
arg_end = p;
}
else
emsg(_(e_stringreq));
}
*p = c1;
vim_free(stringval);
}
return arg_end;
}
/*
* Set a register, part of ex_let_one().
*/
static char_u *
ex_let_register(
char_u *arg,
typval_T *tv,
int flags,
char_u *endchars,
char_u *op)
{
char_u *arg_end = NULL;
if ((flags & (ASSIGN_CONST | ASSIGN_FINAL))
&& (flags & ASSIGN_FOR_LOOP) == 0)
{
emsg(_("E996: Cannot lock a register"));
return NULL;
}
++arg;
if (op != NULL && vim_strchr((char_u *)"+-*/%", *op) != NULL)
semsg(_(e_letwrong), op);
else if (endchars != NULL
&& vim_strchr(endchars, *skipwhite(arg + 1)) == NULL)
emsg(_(e_unexpected_characters_in_let));
else
{
char_u *ptofree = NULL;
char_u *p;
p = tv_get_string_chk(tv);
if (p != NULL && op != NULL && *op == '.')
{
char_u *s = get_reg_contents(*arg == '@'
? '"' : *arg, GREG_EXPR_SRC);
if (s != NULL)
{
p = ptofree = concat_str(s, p);
vim_free(s);
}
}
if (p != NULL)
{
write_reg_contents(*arg == '@' ? '"' : *arg, p, -1, FALSE);
arg_end = arg + 1;
}
vim_free(ptofree);
}
return arg_end;
}
/*
* Set one item of ":let var = expr" or ":let [v1, v2] = list" to its value.
* Returns a pointer to the char just after the var name.
@@ -1303,13 +1537,7 @@ ex_let_one(
char_u *op, // "+", "-", "." or NULL
int var_idx) // variable index for "let [a, b] = list"
{
int c1;
char_u *name;
char_u *p;
char_u *arg_end = NULL;
int len;
int opt_flags;
char_u *tofree = NULL;
if (in_vim9script() && (flags & (ASSIGN_NO_DECL | ASSIGN_DECL)) == 0
&& (flags & (ASSIGN_CONST | ASSIGN_FINAL)) == 0
@@ -1319,207 +1547,32 @@ ex_let_one(
return NULL;
}
// ":let $VAR = expr": Set environment variable.
if (*arg == '$')
{
if ((flags & (ASSIGN_CONST | ASSIGN_FINAL))
&& (flags & ASSIGN_FOR_LOOP) == 0)
{
emsg(_("E996: Cannot lock an environment variable"));
return NULL;
}
// Find the end of the name.
++arg;
name = arg;
len = get_env_len(&arg);
if (len == 0)
semsg(_(e_invarg2), name - 1);
else
{
if (op != NULL && vim_strchr((char_u *)"+-*/%", *op) != NULL)
semsg(_(e_letwrong), op);
else if (endchars != NULL
&& vim_strchr(endchars, *skipwhite(arg)) == NULL)
emsg(_(e_unexpected_characters_in_let));
else if (!check_secure())
{
c1 = name[len];
name[len] = NUL;
p = tv_get_string_chk(tv);
if (p != NULL && op != NULL && *op == '.')
{
int mustfree = FALSE;
char_u *s = vim_getenv(name, &mustfree);
if (s != NULL)
{
p = tofree = concat_str(s, p);
if (mustfree)
vim_free(s);
}
}
if (p != NULL)
{
vim_setenv_ext(name, p);
arg_end = arg;
}
name[len] = c1;
vim_free(tofree);
}
}
// ":let $VAR = expr": Set environment variable.
return ex_let_env(arg, tv, flags, endchars, op);
}
// ":let &option = expr": Set option value.
// ":let &l:option = expr": Set local option value.
// ":let &g:option = expr": Set global option value.
// ":for &ts in range(8)": Set option value for for loop
else if (*arg == '&')
{
if ((flags & (ASSIGN_CONST | ASSIGN_FINAL))
&& (flags & ASSIGN_FOR_LOOP) == 0)
{
emsg(_(e_const_option));
return NULL;
}
// Find the end of the name.
p = find_option_end(&arg, &opt_flags);
if (p == NULL || (endchars != NULL
&& vim_strchr(endchars, *skipwhite(p)) == NULL))
emsg(_(e_unexpected_characters_in_let));
else
{
long n = 0;
getoption_T opt_type;
long numval;
char_u *stringval = NULL;
char_u *s = NULL;
int failed = FALSE;
c1 = *p;
*p = NUL;
opt_type = get_option_value(arg, &numval, &stringval, opt_flags);
if ((opt_type == gov_bool
|| opt_type == gov_number
|| opt_type == gov_hidden_bool
|| opt_type == gov_hidden_number)
&& (tv->v_type != VAR_STRING || !in_vim9script()))
{
if (opt_type == gov_bool || opt_type == gov_hidden_bool)
// bool, possibly hidden
n = (long)tv_get_bool(tv);
else
// number, possibly hidden
n = (long)tv_get_number(tv);
}
// Avoid setting a string option to the text "v:false" or similar.
// In Vim9 script also don't convert a number to string.
if (tv->v_type != VAR_BOOL && tv->v_type != VAR_SPECIAL
&& (!in_vim9script() || tv->v_type != VAR_NUMBER))
s = tv_get_string_chk(tv);
if (op != NULL && *op != '=')
{
if (((opt_type == gov_bool || opt_type == gov_number)
&& *op == '.')
|| (opt_type == gov_string && *op != '.'))
{
semsg(_(e_letwrong), op);
failed = TRUE; // don't set the value
}
else
{
// number, in legacy script also bool
if (opt_type == gov_number
|| (opt_type == gov_bool && !in_vim9script()))
{
switch (*op)
{
case '+': n = numval + n; break;
case '-': n = numval - n; break;
case '*': n = numval * n; break;
case '/': n = (long)num_divide(numval, n,
&failed); break;
case '%': n = (long)num_modulus(numval, n,
&failed); break;
}
s = NULL;
}
else if (opt_type == gov_string
&& stringval != NULL && s != NULL)
{
// string
s = concat_str(stringval, s);
vim_free(stringval);
stringval = s;
}
}
}
if (!failed)
{
if (opt_type != gov_string || s != NULL)
{
set_option_value(arg, n, s, opt_flags);
arg_end = p;
}
else
emsg(_(e_stringreq));
}
*p = c1;
vim_free(stringval);
}
// ":let &option = expr": Set option value.
// ":let &l:option = expr": Set local option value.
// ":let &g:option = expr": Set global option value.
// ":for &ts in range(8)": Set option value for for loop
return ex_let_option(arg, tv, flags, endchars, op);
}
// ":let @r = expr": Set register contents.
else if (*arg == '@')
{
if ((flags & (ASSIGN_CONST | ASSIGN_FINAL))
&& (flags & ASSIGN_FOR_LOOP) == 0)
{
emsg(_("E996: Cannot lock a register"));
return NULL;
}
++arg;
if (op != NULL && vim_strchr((char_u *)"+-*/%", *op) != NULL)
semsg(_(e_letwrong), op);
else if (endchars != NULL
&& vim_strchr(endchars, *skipwhite(arg + 1)) == NULL)
emsg(_(e_unexpected_characters_in_let));
else
{
char_u *ptofree = NULL;
char_u *s;
p = tv_get_string_chk(tv);
if (p != NULL && op != NULL && *op == '.')
{
s = get_reg_contents(*arg == '@' ? '"' : *arg, GREG_EXPR_SRC);
if (s != NULL)
{
p = ptofree = concat_str(s, p);
vim_free(s);
}
}
if (p != NULL)
{
write_reg_contents(*arg == '@' ? '"' : *arg, p, -1, FALSE);
arg_end = arg + 1;
}
vim_free(ptofree);
}
// ":let @r = expr": Set register contents.
return ex_let_register(arg, tv, flags, endchars, op);
}
// ":let var = expr": Set internal variable.
// ":let var: type = expr": Set internal variable with type.
// ":let {expr} = expr": Idem, name made with curly braces
else if (eval_isnamec1(*arg) || *arg == '{')
{
lval_T lv;
char_u *p;
// ":let var = expr": Set internal variable.
// ":let var: type = expr": Set internal variable with type.
// ":let {expr} = expr": Idem, name made with curly braces
p = get_lval(arg, tv, &lv, FALSE, FALSE,
(flags & (ASSIGN_NO_DECL | ASSIGN_DECL))
? GLV_NO_DECL : 0, FNE_CHECK_START);
@@ -1527,7 +1580,9 @@ ex_let_one(
{
if (endchars != NULL && vim_strchr(endchars,
*skipwhite(lv.ll_name_end)) == NULL)
{
emsg(_(e_unexpected_characters_in_let));
}
else
{
set_var_lval(&lv, p, tv, copy, flags, op, var_idx);
@@ -1536,7 +1591,6 @@ ex_let_one(
}
clear_lval(&lv);
}
else
semsg(_(e_invarg2), arg);

2
src/version.c
View File

@@ -757,6 +757,8 @@ static char *(features[]) =
static int included_patches[] =
{ /* Add new patch number below this line */
/**/
3689,
/**/
3688,
/**/