[PATCH 5/6] virDomainDeviceLoadparmIsValid: Use 'strspn' instead of a loop

[Peter Krempa <pkrempa@xxxxxxxxxx>]

In other places we use strspn to validate a character subset. Convert
the in-place loop and simplify the error message.

Signed-off-by: Peter Krempa <pkrempa@xxxxxxxxxx>
---
 src/conf/domain_conf.c                        | 19 +++++--------------
 .../machine-loadparm-s390-char-invalid.err    |  2 +-
 2 files changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index c542782750..b1cc229d97 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -6298,8 +6298,6 @@ virDomainObjCheckActive(virDomainObj *dom)
 static bool
 virDomainDeviceLoadparmIsValid(const char *loadparm)
 {
-    size_t i;
-
     if (virStringIsEmpty(loadparm) || !STRLIM(loadparm, 8)) {
         virReportError(VIR_ERR_INTERNAL_ERROR,
                        _("loadparm value '%s' must be between 1 and 8 characters"),
@@ -6307,18 +6305,11 @@ virDomainDeviceLoadparmIsValid(const char *loadparm)
         return false;
     }

-    for (i = 0; i < strlen(loadparm); i++) {
-        uint8_t c = loadparm[i];
-
-        if (('A' <= c && c <= 'Z') || ('0' <= c && c <= '9') ||
-            (c == '.') || (c == ' ')) {
-            continue;
-        } else {
-            virReportError(VIR_ERR_INTERNAL_ERROR,
-                           _("invalid loadparm char '%c', expecting chars"
-                             " in set of [a-zA-Z0-9.] and blank spaces"), c);
-            return false;
-        }
+    if (strspn(loadparm, "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789. ") != strlen(loadparm)) {
+        virReportError(VIR_ERR_INTERNAL_ERROR,
+                       _("invalid loadparm value '%s', expecting chars in set of [a-zA-Z0-9.] and blank spaces"),
+                       loadparm);
+        return false;
     }

     return true;
diff --git a/tests/qemuxml2argvdata/machine-loadparm-s390-char-invalid.err b/tests/qemuxml2argvdata/machine-loadparm-s390-char-invalid.err
index c3eb455594..0283db9f48 100644
--- a/tests/qemuxml2argvdata/machine-loadparm-s390-char-invalid.err
+++ b/tests/qemuxml2argvdata/machine-loadparm-s390-char-invalid.err
@@ -1 +1 @@
-internal error: invalid loadparm char '?', expecting chars in set of [a-zA-Z0-9.] and blank spaces
+internal error: invalid loadparm value 'SYS1?', expecting chars in set of [a-zA-Z0-9.] and blank spaces
-- 
2.31.1