[libvirt] [PATCH] maint: remove redundant tests after virStrToLong

[Eric Blake]

virStrToLong* guarantees (via strtol) that the end pointer will be set
to the point at which parsing stopped (even on failure, this point is
the start of the input string).

* src/esx/esx_driver.c (esxGetVersion): Remove pointless
conditional.
* src/qemu/qemu_conf.c (qemuParseCommandLinePCI)
(qemuParseCommandLineUSB, qemuParseCommandLineSmp): Likewise.
* src/qemu/qemu_monitor_text.c
(qemuMonitorTextGetMigrationStatus): Likewise.
---
 src/esx/esx_driver.c         |    6 ++----
 src/qemu/qemu_conf.c         |   14 ++++++--------
 src/qemu/qemu_monitor_text.c |    6 +++---
 3 files changed, 11 insertions(+), 15 deletions(-)

diff --git a/src/esx/esx_driver.c b/src/esx/esx_driver.c
index bbe8a51..f07493e 100644
--- a/src/esx/esx_driver.c
+++ b/src/esx/esx_driver.c
@@ -690,13 +690,11 @@ esxGetVersion(virConnectPtr conn, unsigned long *version)
     temp = (char *)priv->host->service->about->version;

     /* Expecting 'major.minor.release' format */
-    if (virStrToLong_ui(temp, &temp, 10, &major) < 0 || temp == NULL ||
-        *temp != '.') {
+    if (virStrToLong_ui(temp, &temp, 10, &major) < 0 || *temp != '.') {
         goto failure;
     }

-    if (virStrToLong_ui(temp + 1, &temp, 10, &minor) < 0 || temp == NULL ||
-        *temp != '.') {
+    if (virStrToLong_ui(temp + 1, &temp, 10, &minor) < 0 || *temp != '.') {
         goto failure;
     }

diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c
index 8f6f7ec..5d0b211 100644
--- a/src/qemu/qemu_conf.c
+++ b/src/qemu/qemu_conf.c
@@ -5217,14 +5217,14 @@ qemuParseCommandLinePCI(const char *val)
     }

     start = val + strlen("host=");
-    if (virStrToLong_i(start, &end, 16, &bus) < 0 || !end || *end != ':') {
+    if (virStrToLong_i(start, &end, 16, &bus) < 0 || *end != ':') {
         qemuReportError(VIR_ERR_INTERNAL_ERROR,
                         _("cannot extract PCI device bus '%s'"), val);
         VIR_FREE(def);
         goto cleanup;
     }
     start = end + 1;
-    if (virStrToLong_i(start, &end, 16, &slot) < 0 || !end || *end != '.') {
+    if (virStrToLong_i(start, &end, 16, &slot) < 0 || *end != '.') {
         qemuReportError(VIR_ERR_INTERNAL_ERROR,
                         _("cannot extract PCI device slot '%s'"), val);
         VIR_FREE(def);
@@ -5275,7 +5275,7 @@ qemuParseCommandLineUSB(const char *val)

     start = val + strlen("host:");
     if (strchr(start, ':')) {
-        if (virStrToLong_i(start, &end, 16, &first) < 0 || !end || *end != ':') {
+        if (virStrToLong_i(start, &end, 16, &first) < 0 || *end != ':') {
             qemuReportError(VIR_ERR_INTERNAL_ERROR,
                             _("cannot extract USB device vendor '%s'"), val);
             VIR_FREE(def);
@@ -5289,7 +5289,7 @@ qemuParseCommandLineUSB(const char *val)
             goto cleanup;
         }
     } else {
-        if (virStrToLong_i(start, &end, 10, &first) < 0 || !end || *end != '.') {
+        if (virStrToLong_i(start, &end, 10, &first) < 0 || *end != '.') {
             qemuReportError(VIR_ERR_INTERNAL_ERROR,
                              _("cannot extract USB device bus '%s'"), val);
             VIR_FREE(def);
@@ -5573,13 +5573,11 @@ qemuParseCommandLineSmp(virDomainDefPtr dom,
     for (i = 0; i < nkws; i++) {
         if (vals[i] == NULL) {
             if (i > 0 ||
-                virStrToLong_i(kws[i], &end, 10, &n) < 0 ||
-                !end || *end != '\0')
+                virStrToLong_i(kws[i], &end, 10, &n) < 0 || *end != '\0')
                 goto syntax;
             dom->vcpus = n;
         } else {
-            if (virStrToLong_i(vals[i], &end, 10, &n) < 0 ||
-                !end || *end != '\0')
+            if (virStrToLong_i(vals[i], &end, 10, &n) < 0 || *end != '\0')
                 goto syntax;
             if (STREQ(kws[i], "sockets"))
                 sockets = n;
diff --git a/src/qemu/qemu_monitor_text.c b/src/qemu/qemu_monitor_text.c
index 1596e59..a199de7 100644
--- a/src/qemu/qemu_monitor_text.c
+++ b/src/qemu/qemu_monitor_text.c
@@ -1075,7 +1075,7 @@ int qemuMonitorTextGetMigrationStatus(qemuMonitorPtr mon,
                 goto done;
             tmp += strlen(MIGRATION_TRANSFER_PREFIX);

-            if (virStrToLong_ull(tmp, &end, 10, transferred) < 0 || !end) {
+            if (virStrToLong_ull(tmp, &end, 10, transferred) < 0) {
                 qemuReportError(VIR_ERR_INTERNAL_ERROR,
                                 _("cannot parse migration data transferred statistic %s"), tmp);
                 goto cleanup;
@@ -1087,7 +1087,7 @@ int qemuMonitorTextGetMigrationStatus(qemuMonitorPtr mon,
                 goto done;
             tmp += strlen(MIGRATION_REMAINING_PREFIX);

-            if (virStrToLong_ull(tmp, &end, 10, remaining) < 0 || !end) {
+            if (virStrToLong_ull(tmp, &end, 10, remaining) < 0) {
                 qemuReportError(VIR_ERR_INTERNAL_ERROR,
                                 _("cannot parse migration data remaining statistic %s"), tmp);
                 goto cleanup;
@@ -1098,7 +1098,7 @@ int qemuMonitorTextGetMigrationStatus(qemuMonitorPtr mon,
                 goto done;
             tmp += strlen(MIGRATION_TOTAL_PREFIX);

-            if (virStrToLong_ull(tmp, &end, 10, total) < 0 || !end) {
+            if (virStrToLong_ull(tmp, &end, 10, total) < 0) {
                 qemuReportError(VIR_ERR_INTERNAL_ERROR,
                                 _("cannot parse migration data total statistic %s"), tmp);
                 goto cleanup;
-- 
1.6.6.1