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[Qemu-devel] [PATCH v1 1/9] cutils: add qemu_strtod() and qemu_strtod_fi
From: |
David Hildenbrand |
Subject: |
[Qemu-devel] [PATCH v1 1/9] cutils: add qemu_strtod() and qemu_strtod_finite() |
Date: |
Thu, 15 Nov 2018 15:04:53 +0100 |
Let's provide a wrapper for strtod().
Signed-off-by: David Hildenbrand <address@hidden>
---
include/qemu/cutils.h | 2 ++
util/cutils.c | 38 ++++++++++++++++++++++++++++++++++++++
2 files changed, 40 insertions(+)
diff --git a/include/qemu/cutils.h b/include/qemu/cutils.h
index 7071bfe2d4..756b41c193 100644
--- a/include/qemu/cutils.h
+++ b/include/qemu/cutils.h
@@ -146,6 +146,8 @@ int qemu_strtoi64(const char *nptr, const char **endptr,
int base,
int64_t *result);
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 parse_uint(const char *s, unsigned long long *value, char **endptr,
int base);
diff --git a/util/cutils.c b/util/cutils.c
index 698bd315bd..7868a683e8 100644
--- a/util/cutils.c
+++ b/util/cutils.c
@@ -544,6 +544,44 @@ int qemu_strtou64(const char *nptr, const char **endptr,
int base,
return check_strtox_error(nptr, ep, endptr, errno);
}
+/**
+ * Convert string @nptr to a double.
+ *
+ * Works like qemu_strtoul(), except it stores +/-HUGE_VAL on
+ * overflow/underflow.
+ */
+int qemu_strtod(const char *nptr, const char **endptr, double *result)
+{
+ char *ep;
+
+ if (!nptr) {
+ if (endptr) {
+ *endptr = nptr;
+ }
+ return -EINVAL;
+ }
+
+ errno = 0;
+ *result = strtod(nptr, &ep);
+ return check_strtox_error(nptr, ep, endptr, errno);
+}
+
+/**
+ * Convert string @nptr to a finite double.
+ *
+ * Works like qemu_strtoul(), except it stores +/-HUGE_VAL on
+ * overflow/underflow. "NaN" or "inf" are rejcted with -EINVAL.
+ */
+int qemu_strtod_finite(const char *nptr, const char **endptr, double *result)
+{
+ int ret = qemu_strtod(nptr, endptr, result);
+
+ if (!ret && !isfinite(*result)) {
+ return -EINVAL;
+ }
+ return ret;
+}
+
/**
* Searches for the first occurrence of 'c' in 's', and returns a pointer
* to the trailing null byte if none was found.
--
2.17.2
[Qemu-devel] [PATCH v1 2/9] cutils: use qemu_strtod_finite() in do_strtosz(), David Hildenbrand, 2018/11/15
[Qemu-devel] [PATCH v1 3/9] qapi: use qemu_strtod_finite() in string-input-visitor, David Hildenbrand, 2018/11/15