motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-02 23:33:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

utils: Deprecate hex-with-suffix sizes

Browse source 
Supporting '0x20M' looks odd, particularly since we have a 'B' suffix
that is ambiguous for bytes, as well as a less-frequently-used 'E'
suffix for extremely large exibytes.  In practice, people using hex
inputs are specifying values in bytes (and would have written
0x2000000, or possibly relied on default_suffix in the case of
qemu_strtosz_MiB), and the use of scaling suffixes makes the most
sense for inputs in decimal (where the user would write 32M).  But
rather than outright dropping support for hex-with-suffix, let's
follow our deprecation policy.  Sadly, since qemu_strtosz() does not
have an Err** parameter, and plumbing that in would be a much larger
task, we instead go with just directly emitting the deprecation
warning to stderr.

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20210211204438.1184395-4-eblake@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Eric Blake 2021-02-11 14:44:37 -06:00
parent cf923b783e
commit f174cd3350
2 changed files with 17 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

10
util/cutils.c
View file

@ -250,6 +250,9 @@ static int64_t suffix_mul(char suffix, int64_t unit)
* fractional portion is truncated to byte
* - 0x7fEE - hexadecimal, unit determined by @default_suffix
*
* The following cause a deprecation warning, and may be removed in the future
* - 0xabc{kKmMgGtTpP} - hex with scaling suffix
*
* The following are intentionally not supported
* - octal, such as 08
* - fractional hex, such as 0x1.8
@ -272,7 +275,7 @@ static int do_strtosz(const char *nptr, const char **end,
int retval;
const char *endptr, *f;
unsigned char c;
bool mul_required = false;
bool mul_required = false, hex = false;
uint64_t val;
int64_t mul;
double fraction = 0.0;
@ -298,6 +301,7 @@ static int do_strtosz(const char *nptr, const char **end,
retval = -EINVAL;
goto out;
}
hex = true;
} else if (*endptr == '.') {
/*
* Input looks like a fraction. Make sure even 1.k works
@ -320,6 +324,10 @@ static int do_strtosz(const char *nptr, const char **end,
c = *endptr;
mul = suffix_mul(c, unit);
if (mul > 0) {
if (hex) {
warn_report("Using a multiplier suffix on hex numbers "
"is deprecated: %s", nptr);
}
endptr++;
} else {
mul = suffix_mul(default_suffix, unit);