Work like qemu_strtod() and qemu_strtold_finite, except store long
double.
Signed-off-by: Tao Xu <tao3...@intel.com>
---
No changes in v17.
---
include/qemu/cutils.h | 3 +++
util/cutils.c | 48 ++++++++++++++++++++++++++++++++++++++++++-
2 files changed, 50 insertions(+), 1 deletion(-)
diff --git a/include/qemu/cutils.h b/include/qemu/cutils.h
index b54c847e0f..48cf9bf776 100644
--- a/include/qemu/cutils.h
+++ b/include/qemu/cutils.h
@@ -146,6 +146,9 @@ int qemu_strtou64(const char *nptr, const char **endptr,
int base,
uint64_t *result);
int qemu_strtod(const char *nptr, const char **endptr, double *result);
int qemu_strtod_finite(const char *nptr, const char **endptr, double *result);
+int qemu_strtold(const char *nptr, const char **endptr, long double *result);
+int qemu_strtold_finite(const char *nptr, const char **endptr,
+ long double *result);
int parse_uint(const char *s, unsigned long long *value, char **endptr,
int base);
diff --git a/util/cutils.c b/util/cutils.c
index fd591cadf0..5db3b2add5 100644
--- a/util/cutils.c
+++ b/util/cutils.c
@@ -553,7 +553,7 @@ int qemu_strtou64(const char *nptr, const char **endptr,
int base,
/**
* Convert string @nptr to a double.
- *
+ *
* This is a wrapper around strtod() that is harder to misuse.
* Semantics of @nptr and @endptr match strtod() with differences
* noted below.
@@ -616,6 +616,52 @@ int qemu_strtod_finite(const char *nptr, const char
**endptr, double *result)
return ret;
}
+/*
+ * Convert string @nptr to a long double.
+ *
+ * Works like qemu_strtod(), except it stores long double.
+ */
+int qemu_strtold(const char *nptr, const char **endptr, long double *result)
+{
+ char *ep;
+
+ if (!nptr) {
+ if (endptr) {
+ *endptr = nptr;
+ }
+ return -EINVAL;
+ }
+
+ errno = 0;
+ *result = strtold(nptr, &ep);
+ return check_strtox_error(nptr, ep, endptr, errno);
+}
+
+/*
+ * Convert string @nptr to a finite long double.
+ *
+ * Works like qemu_strtod_finite(), except it stores long double.
+ */
+int qemu_strtold_finite(const char *nptr, const char **endptr,
+ long double *result)
+{
+ long double tmp;
+ int ret;
+
+ ret = qemu_strtold(nptr, endptr, &tmp);
+ if (!ret && !isfinite(tmp)) {
+ if (endptr) {
+ *endptr = nptr;
+ }
+ ret = -EINVAL;
+ }
+
+ if (ret != -EINVAL) {
+ *result = tmp;
+ }
+ return ret;
+}
+
/**
* Searches for the first occurrence of 'c' in 's', and returns a pointer
* to the trailing null byte if none was found.
--
2.20.1
