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[Qemu-devel] [PATCH 2/7] Support human unit formats in strtosz, eg. 1.0G
From: |
Jes . Sorensen |
Subject: |
[Qemu-devel] [PATCH 2/7] Support human unit formats in strtosz, eg. 1.0G |
Date: |
Fri, 8 Oct 2010 11:15:55 +0200 |
From: Jes Sorensen <address@hidden>
Signed-off-by: Jes Sorensen <address@hidden>
---
cutils.c | 34 ++++++++++++++++++++++++++--------
1 files changed, 26 insertions(+), 8 deletions(-)
diff --git a/cutils.c b/cutils.c
index ee591c5..0782032 100644
--- a/cutils.c
+++ b/cutils.c
@@ -291,34 +291,52 @@ int fcntl_setfl(int fd, int flag)
*/
ssize_t strtosz(const char *nptr, char **end)
{
- int64_t value;
+ ssize_t retval = -1;
char *endptr;
+ int mul_required = 0;
+ double val, mul = 1;
+
+ endptr = (char *)nptr + strspn(nptr, " 0123456789");
+ if (*endptr == '.') {
+ mul_required = 1;
+ }
+
+ val = strtod(nptr, &endptr);
+
+ if (val < 0)
+ goto fail;
- value = strtoll(nptr, &endptr, 0);
switch (*endptr++) {
case 'K':
case 'k':
- value <<= 10;
+ mul = 1 << 10;
break;
case 0:
+ case ' ':
+ if (mul_required) {
+ goto fail;
+ }
case 'M':
case 'm':
- value <<= 20;
+ mul = 1ULL << 20;
break;
case 'G':
case 'g':
- value <<= 30;
+ mul = 1ULL << 30;
break;
case 'T':
case 't':
- value <<= 40;
+ mul = 1ULL << 40;
break;
default:
- value = -1;
+ goto fail;
}
+ retval = (ssize_t)(val * mul);
+
if (end)
*end = endptr;
- return value;
+fail:
+ return retval;
}
--
1.7.2.3
- [Qemu-devel] [PATCH v4 0/7] Introduce strtosz and make use of it, Jes . Sorensen, 2010/10/08
- [Qemu-devel] [PATCH 2/7] Support human unit formats in strtosz, eg. 1.0G,
Jes . Sorensen <=
- [Qemu-devel] [PATCH 3/7] Add more error handling to strtosz(), Jes . Sorensen, 2010/10/08
- [Qemu-devel] [PATCH 4/7] Add support for 'o' octet (bytes) format as monitor parameter., Jes . Sorensen, 2010/10/08
- [Qemu-devel] [PATCH 5/7] Switch migrate_set_speed() to take an 'o' argument rather than a float., Jes . Sorensen, 2010/10/08
- [Qemu-devel] [PATCH 6/7] Clarify default values in migration speed argument in monitor, Jes . Sorensen, 2010/10/08