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Merge `vsnprintf` `%b`, `%T` & `%M` code into `%s`/`%u` 

This commit prepares for MDEV-21978 which wants to migrate
extensions from *specifiers* to standard-compatible *suffixes*,
complete with boolean local vars. In this new format,
branches will land on `%s`/`%u` before processing the suffix.
This commit contains non-breaking portions of MDEV-21978 work.

This commit also changes an `if`-`else` chain to
a `switch` block simply because it’s an eyesore.
pull/3833/head
ParadoxV5 1 year ago
committed by Sergei Golubchik
parent
9799777992
commit
06851e7f77
1 changed files with 82 additions and 81 deletions
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  1. 163
      strings/my_vsnprintf.c

163
strings/my_vsnprintf.c
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@ -521,27 +521,24 @@ start:
switch (print_arr[i].arg_type) {
case 's':
case 'T':
{
longlong min_field_width;
char *par= args_arr[print_arr[i].arg_idx].str_arg;
width= (print_arr[i].flags & WIDTH_ARG)
? (size_t)args_arr[print_arr[i].width].longlong_arg
: print_arr[i].width;
min_field_width= (print_arr[i].flags & LENGTH_ARG)
? args_arr[print_arr[i].length].longlong_arg
: (longlong) print_arr[i].length;
to= process_str_arg(cs, to, end, min_field_width, width, par,
print_arr[i].flags,
(print_arr[i].arg_type == 'T'));
break;
}
case 'b':
{
char *par = args_arr[print_arr[i].arg_idx].str_arg;
char *par= args_arr[print_arr[i].arg_idx].str_arg;
my_bool suffix_b= print_arr[i].arg_type == 'b';
my_bool suffix_t= print_arr[i].arg_type == 'T';
width= (print_arr[i].flags & WIDTH_ARG)
? (size_t)args_arr[print_arr[i].width].longlong_arg
: print_arr[i].width;
to= process_bin_arg(to, end, width, par);
if (suffix_b)
to= process_bin_arg(to, end, width, par);
else
{
longlong min_field_width= (print_arr[i].flags & LENGTH_ARG)
? args_arr[print_arr[i].length].longlong_arg
: (longlong) print_arr[i].length;
to= process_str_arg(cs, to, end, min_field_width, width, par,
print_arr[i].flags, suffix_t);
}
break;
}
case 'c':
@ -567,40 +564,37 @@ start:
case 'X':
case 'o':
case 'p':
{
/* Integer parameter */
longlong larg;
length= (print_arr[i].flags & LENGTH_ARG)
? (size_t)args_arr[print_arr[i].length].longlong_arg
: print_arr[i].length;
larg = args_arr[print_arr[i].arg_idx].longlong_arg;
to= process_int_arg(to, end, length, larg, print_arr[i].arg_type,
print_arr[i].flags);
break;
}
case 'M':
{
longlong larg;
const char *real_end;
width= (print_arr[i].flags & WIDTH_ARG)
? (size_t)args_arr[print_arr[i].width].longlong_arg
: print_arr[i].width;
real_end= MY_MIN(to + width, end);
larg = args_arr[print_arr[i].arg_idx].longlong_arg;
to= process_int_arg(to, real_end, 0, larg, 'd', print_arr[i].flags);
if (real_end - to >= 3)
/* Integer parameter */
longlong larg= args_arr[print_arr[i].arg_idx].longlong_arg;
my_bool suffix_e= print_arr[i].arg_type == 'M';
if (suffix_e)
{
char errmsg_buff[MYSYS_STRERROR_SIZE];
*to++= ' ';
*to++= '"';
my_strerror(errmsg_buff, sizeof(errmsg_buff), (int) larg);
to= process_str_arg(cs, to, real_end, 0, width, errmsg_buff,
print_arr[i].flags, 1);
if (real_end > to) *to++= '"';
const char *real_end;
width= (print_arr[i].flags & WIDTH_ARG)
? (size_t)args_arr[print_arr[i].width].longlong_arg
: print_arr[i].width;
real_end= MY_MIN(to + width, end);
to= process_int_arg(to, real_end, 0, larg, 'd', print_arr[i].flags);
if (real_end - to >= 3)
{
char errmsg_buff[MYSYS_STRERROR_SIZE];
*to++= ' ';
*to++= '"';
my_strerror(errmsg_buff, sizeof(errmsg_buff), (int) larg);
to= process_str_arg(cs, to, real_end, 0, width, errmsg_buff,
print_arr[i].flags, 1);
if (real_end > to)
*to++= '"';
}
}
else {
length= (print_arr[i].flags & LENGTH_ARG)
? (size_t)args_arr[print_arr[i].length].longlong_arg
: print_arr[i].length;
to= process_int_arg(to, end, length, larg, print_arr[i].arg_type,
print_arr[i].flags);
}
break;
}
@ -723,20 +717,22 @@ size_t my_vsnprintf_ex(CHARSET_INFO *cs, char *to, size_t n,
fmt= check_longlong(fmt, &have_longlong);
if (*fmt == 's' || *fmt == 'T') /* String parameter */
switch(*fmt) {
case 's':
case 'T':
case 'b':
{
/* String parameter */
reg2 char *par= va_arg(ap, char *);
to= process_str_arg(cs, to, end, (longlong) length, width, par,
print_type, (*fmt == 'T'));
continue;
}
else if (*fmt == 'b') /* Buffer parameter */
{
char *par = va_arg(ap, char *);
to= process_bin_arg(to, end, width, par);
my_bool suffix_b= *fmt == 'b', suffix_t= *fmt == 'T';
to= (suffix_b)
? process_bin_arg(to, end, width, par)
: process_str_arg(cs, to, end, (longlong) length, width, par,
print_type, suffix_t);
continue;
}
else if (*fmt == 'f' || *fmt == 'g')
case 'f':
case 'g':
{
double d;
#if __has_feature(memory_sanitizer) /* QQ: MSAN has double trouble? */
@ -749,23 +745,45 @@ size_t my_vsnprintf_ex(CHARSET_INFO *cs, char *to, size_t n,
to= process_dbl_arg(to, end, width, d, *fmt);
continue;
}
else if (*fmt == 'd' || *fmt == 'i' || *fmt == 'u' || *fmt == 'x' ||
*fmt == 'X' || *fmt == 'p' || *fmt == 'o')
case 'd':
case 'i':
case 'u':
case 'x':
case 'X':
case 'o':
case 'p':
case 'M':
{
/* Integer parameter */
longlong larg;
my_bool suffix_e= *fmt == 'M';
if (have_longlong)
larg = va_arg(ap,longlong);
else if (*fmt == 'd' || *fmt == 'i')
else if (*fmt == 'd' || *fmt == 'i' || suffix_e)
larg = va_arg(ap, int);
else
larg= va_arg(ap, uint);
to= process_int_arg(to, end, length, larg, *fmt, print_type);
if (suffix_e)
{
const char *real_end= MY_MIN(to + width, end);
to= process_int_arg(to, real_end, 0, larg, 'd', print_type);
if (real_end - to >= 3)
{
char errmsg_buff[MYSYS_STRERROR_SIZE];
*to++= ' ';
*to++= '"';
my_strerror(errmsg_buff, sizeof(errmsg_buff), (int) larg);
to= process_str_arg(cs, to, real_end, 0, width, errmsg_buff,
print_type, 1);
if (real_end > to)
*to++= '"';
}
}
else
to= process_int_arg(to, end, length, larg, *fmt, print_type);
continue;
}
else if (*fmt == 'c') /* Character parameter */
case 'c': /* Character parameter */
{
register int larg;
if (to == end)
@ -774,23 +792,6 @@ size_t my_vsnprintf_ex(CHARSET_INFO *cs, char *to, size_t n,
*to++= (char) larg;
continue;
}
else if (*fmt == 'M')
{
int larg= va_arg(ap, int);
const char *real_end= MY_MIN(to + width, end);
to= process_int_arg(to, real_end, 0, larg, 'd', print_type);
if (real_end - to >= 3)
{
char errmsg_buff[MYSYS_STRERROR_SIZE];
*to++= ' ';
*to++= '"';
my_strerror(errmsg_buff, sizeof(errmsg_buff), (int) larg);
to= process_str_arg(cs, to, real_end, 0, width, errmsg_buff,
print_type, 1);
if (real_end > to) *to++= '"';
}
continue;
}
/* We come here on '%%', unknown code or too long parameter */

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