Merge remote-tracking branch 'whot/server-1.12-branch' into server-1.12-branch

4 files changed, 123 insertions, 63 deletions

diff --git a/Xi/xiquerypointer.c b/Xi/xiquerypointer.c
index a2e7442e0..169436e14 100644
--- a/Xi/xiquerypointer.c
+++ b/Xi/xiquerypointer.c
@@ -79,10 +79,21 @@ ProcXIQueryPointer(ClientPtr client)
     XkbStatePtr state;
     char *buttons = NULL;
     int buttons_size = 0;       /* size of buttons array */
+    XIClientPtr xi_client;
+    Bool have_xi22 = FALSE;
 
     REQUEST(xXIQueryPointerReq);
     REQUEST_SIZE_MATCH(xXIQueryPointerReq);
 
+    /* Check if client is compliant with XInput 2.2 or later. Earlier clients
+     * do not know about touches, so we must report emulated button presses. 2.2
+     * and later clients are aware of touches, so we don't include emulated
+     * button presses in the reply. */
+    xi_client = dixLookupPrivate(&client->devPrivates, XIClientPrivateKey);
+    if (version_compare(xi_client->major_version,
+                        xi_client->minor_version, 2, 2) >= 0)
+        have_xi22 = TRUE;
+
     rc = dixLookupDevice(&pDev, stuff->deviceid, client, DixReadAccess);
     if (rc != Success) {
         client->errorValue = stuff->deviceid;
@@ -132,7 +143,7 @@ ProcXIQueryPointer(ClientPtr client)
     }
 
     if (pDev->button) {
-        int i, down;
+        int i;
 
         rep.buttons_len =
             bytes_to_int32(bits_to_bytes(pDev->button->numButtons));
@@ -142,14 +153,12 @@ ProcXIQueryPointer(ClientPtr client)
         if (!buttons)
             return BadAlloc;
 
-        down = pDev->button->buttonsDown;
+        for (i = 1; i < pDev->button->numButtons; i++)
+            if (BitIsOn(pDev->button->down, i))
+                SetBit(buttons, pDev->button->map[i]);
 
-        for (i = 0; i < pDev->button->numButtons && down; i++) {
-            if (BitIsOn(pDev->button->down, i)) {
-                SetBit(buttons, i);
-                down--;
-            }
-        }
+        if (!have_xi22 && pDev->touch && pDev->touch->buttonsDown > 0)
+            SetBit(buttons, pDev->button->map[1]);
     }
     else
         rep.buttons_len = 0;
diff --git a/include/Xprintf.h b/include/Xprintf.h
index 414fd46fb..9e8cdc5dc 100644
--- a/include/Xprintf.h
+++ b/include/Xprintf.h
@@ -66,4 +66,16 @@ _X_ATTRIBUTE_PRINTF(2, 0);
 #define vasprintf Xvasprintf
 #endif
 
+/*
+ * These functions provide a portable implementation of the linux kernel
+ * scnprintf & vscnprintf routines that return the number of bytes actually
+ * copied during a snprintf, (excluding the final '\0').
+ */
+extern _X_EXPORT int
+Xscnprintf(char *s, int n, const char * _X_RESTRICT_KYWD fmt, ...)
+_X_ATTRIBUTE_PRINTF(3,4);
+extern _X_EXPORT int
+Xvscnprintf(char *s, int n, const char * _X_RESTRICT_KYWD fmt, va_list va)
+_X_ATTRIBUTE_PRINTF(3,0);
+
 #endif                          /* XPRINTF_H */
diff --git a/os/log.c b/os/log.c
index 0ccd12613..0e4957295 100644
--- a/os/log.c
+++ b/os/log.c
@@ -165,7 +165,7 @@ asm(".desc ___crashreporter_info__, 0x10");
 #define X_NOT_IMPLEMENTED_STRING	"(NI)"
 #endif
 #ifndef X_NONE_STRING
-#define X_NONE_STRING                   ""
+#define X_NONE_STRING			""
 #endif
 
 /*
@@ -223,7 +223,7 @@ LogInit(const char *fname, const char *backup)
      * needed.
      */
     if (saveBuffer && bufferSize > 0) {
-        free(saveBuffer);       /* Must be free(), not free() */
+        free(saveBuffer);
         saveBuffer = NULL;
         bufferSize = 0;
     }
@@ -265,36 +265,19 @@ LogSetParameter(LogParameter param, int value)
 }
 
 /* This function does the actual log message writes. */
-
-void
-LogVWrite(int verb, const char *f, va_list args)
+static void
+LogSWrite(int verb, const char *buf, size_t len, Bool end_line)
 {
-    static char tmpBuffer[1024];
-    int len = 0;
     static Bool newline = TRUE;
 
-    if (newline) {
-        sprintf(tmpBuffer, "[%10.3f] ", GetTimeInMillis() / 1000.0);
-        len = strlen(tmpBuffer);
-        if (logFile)
-            fwrite(tmpBuffer, len, 1, logFile);
-    }
-
-    /*
-     * Since a va_list can only be processed once, write the string to a
-     * buffer, and then write the buffer out to the appropriate output
-     * stream(s).
-     */
-    if (verb < 0 || logFileVerbosity >= verb || logVerbosity >= verb) {
-        vsnprintf(tmpBuffer, sizeof(tmpBuffer), f, args);
-        len = strlen(tmpBuffer);
-    }
-    newline = (tmpBuffer[len - 1] == '\n');
-    if ((verb < 0 || logVerbosity >= verb) && len > 0)
-        fwrite(tmpBuffer, len, 1, stderr);
-    if ((verb < 0 || logFileVerbosity >= verb) && len > 0) {
+    if (verb < 0 || logVerbosity >= verb)
+        fwrite(buf, len, 1, stderr);
+    if (verb < 0 || logFileVerbosity >= verb) {
         if (logFile) {
-            fwrite(tmpBuffer, len, 1, logFile);
+            if (newline)
+                fprintf(logFile, "[%10.3f] ", GetTimeInMillis() / 1000.0);
+            newline = end_line;
+            fwrite(buf, len, 1, logFile);
             if (logFlush) {
                 fflush(logFile);
 #ifndef WIN32
@@ -312,13 +295,19 @@ LogVWrite(int verb, const char *f, va_list args)
                     FatalError("realloc() failed while saving log messages\n");
             }
             bufferUnused -= len;
-            memcpy(saveBuffer + bufferPos, tmpBuffer, len);
+            memcpy(saveBuffer + bufferPos, buf, len);
             bufferPos += len;
         }
     }
 }
 
 void
+LogVWrite(int verb, const char *f, va_list args)
+{
+    return LogVMessageVerb(X_NONE, verb, f, args);
+}
+
+void
 LogWrite(int verb, const char *f, ...)
 {
     va_list args;
@@ -371,22 +360,28 @@ void
 LogVMessageVerb(MessageType type, int verb, const char *format, va_list args)
 {
     const char *type_str;
-    char tmpFormat[1024];
-    const char *new_format;
+    char buf[1024];
+    const size_t size = sizeof(buf);
+    Bool newline;
+    size_t len = 0;
 
     type_str = LogMessageTypeVerbString(type, verb);
     if (!type_str)
         return;
 
-    /* if type_str is not "", prepend it and ' ', to format */
-    if (type_str[0] == '\0')
-        new_format = format;
-    else {
-        new_format = tmpFormat;
-        snprintf(tmpFormat, sizeof(tmpFormat), "%s %s", type_str, format);
-    }
+    /* if type_str is not "", prepend it and ' ', to message */
+    if (type_str[0] != '\0')
+        len += Xscnprintf(&buf[len], size - len, "%s ", type_str);
+
+    if (size - len > 1)
+        len += Xvscnprintf(&buf[len], size - len, format, args);
+
+    /* Force '\n' at end of truncated line */
+    if (size - len == 1)
+        buf[len - 1] = '\n';
 
-    LogVWrite(verb, new_format, args);
+    newline = (buf[len - 1] == '\n');
+    LogSWrite(verb, buf, len, newline);
 }
 
 /* Log message with verbosity level specified. */
@@ -416,31 +411,31 @@ LogVHdrMessageVerb(MessageType type, int verb, const char *msg_format,
                    va_list msg_args, const char *hdr_format, va_list hdr_args)
 {
     const char *type_str;
-    char tmpFormat[1024];
-    char *tmpFormat_end = &tmpFormat[sizeof(tmpFormat)];
-    char *p;
-    int left;
+    char buf[1024];
+    const size_t size = sizeof(buf);
+    Bool newline;
+    size_t len = 0;
 
     type_str = LogMessageTypeVerbString(type, verb);
     if (!type_str)
         return;
 
-    /* if type_str != "", copy it and ' ' to tmpFormat; set p after ' ' */
-    p = tmpFormat;
+    /* if type_str is not "", prepend it and ' ', to message */
     if (type_str[0] != '\0')
-        p += snprintf(tmpFormat, sizeof(tmpFormat), "%s ", type_str);
+        len += Xscnprintf(&buf[len], size - len, "%s ", type_str);
+
+    if (hdr_format && size - len > 1)
+        len += Xvscnprintf(&buf[len], size - len, hdr_format, hdr_args);
 
-    /* append as much of hdr as fits after type_str (if there was one) */
-    left = tmpFormat_end - p;
-    if (left > 1)
-        p += vsnprintf(p, left, hdr_format, hdr_args);
+    if (msg_format && size - len > 1)
+        len += Xvscnprintf(&buf[len], size - len, msg_format, msg_args);
 
-    /* append as much of msg_format as will fit after hdr */
-    left = tmpFormat_end - p;
-    if (left > 1)
-        snprintf(p, left, "%s", msg_format);
+    /* Force '\n' at end of truncated line */
+    if (size - len == 1)
+        buf[len - 1] = '\n';
 
-    LogVWrite(verb, tmpFormat, msg_args);
+    newline = (buf[len - 1] == '\n');
+    LogSWrite(verb, buf, len, newline);
 }
 
 void
diff --git a/os/xprintf.c b/os/xprintf.c
index 17fea2ec7..80caa5790 100644
--- a/os/xprintf.c
+++ b/os/xprintf.c
@@ -186,6 +186,50 @@ XNFasprintf(char **ret, const char *_X_RESTRICT_KYWD format, ...)
     return size;
 }
 
+/**
+ * Varargs snprintf that returns the actual number of bytes (excluding final
+ * '\0') that were copied into the buffer.
+ * This is opposed to the normal sprintf() usually returns the number of bytes
+ * that would have been written.
+ *
+ * @param s       buffer to copy into
+ * @param n       size of buffer s
+ * @param format  printf style format string
+ * @param va      variable argument list
+ * @return        number of bytes actually copied, excluding final '\0'
+ */
+int
+Xvscnprintf(char *s, int n, const char *format, va_list args)
+{
+    int x;
+    if (n == 0)
+        return 0;
+    x = vsnprintf(s, n , format, args);
+    return (x >= n) ? (n - 1) : x;
+}
+
+/**
+ * snprintf that returns the actual number of bytes (excluding final '\0') that
+ * were copied into the buffer.
+ * This is opposed to the normal sprintf() usually returns the number of bytes
+ * that would have been written.
+ *
+ * @param s       buffer to copy into
+ * @param n       size of buffer s
+ * @param format  printf style format string
+ * @param ...     arguments for specified format
+ * @return        number of bytes actually copied, excluding final '\0'
+ */
+int Xscnprintf(char *s, int n, const char *format, ...)
+{
+    int x;
+    va_list ap;
+    va_start(ap, format);
+    x = Xvscnprintf(s, n, format, ap);
+    va_end(ap);
+    return x;
+}
+
 /* Old api, now deprecated, may be removed in the future */
 char *
 Xvprintf(const char *format, va_list va)