Move static `get_hostname()` to `BLI_hostname()` in `system.c`

This makes the `#include <Windows.h>` use more localised and out of the
`image.c` file.

Reviewers: LazyDodo

Reviewed by: LazyDodo

Differential revision: https://developer.blender.org/D4049

source/blender/blenkernel/intern/image.c

@@ -35,16 +35,6 @@
 #ifndef WIN32
 #  include <unistd.h>
 #else
-#  ifndef NOGDI
-#    define NOGDI
-#  endif
-#  ifndef NOMINMAX
-#    define NOMINMAX
-#  endif
-#  ifndef WIN32_LEAN_AND_MEAN
-#    define WIN32_LEAN_AND_MEAN
-#  endif
-#  include <Windows.h> /* for GetComputerName function */
 #  include <io.h>
 #endif
 
@@ -74,6 +64,7 @@
 #include "BLI_blenlib.h"
 #include "BLI_math_vector.h"
 #include "BLI_mempool.h"
+#include "BLI_system.h"
 #include "BLI_threads.h"
 #include "BLI_timecode.h"  /* for stamp timecode format */
 #include "BLI_utildefines.h"
@@ -1566,32 +1557,6 @@ typedef struct StampData {
 } StampData;
 #undef STAMP_NAME_SIZE
 
-/**
- * Obtain the hostname from the system.
- *
- * This simply determines the host's name, and doesn't do any DNS lookup of any
- * IP address of the machine. As such, it's only usable for identification
- * purposes, and not for reachability over a network.
- *
- * @param buffer Character buffer to write the hostname into.
- * @param bufsize Size of the character buffer, including trailing '\0'.
- */
-static void get_hostname(char *buffer, size_t bufsize)
-{
-#ifndef WIN32
-	if (gethostname(buffer, bufsize-1) < 0) {
-		strncpy(buffer, "-unknown-", bufsize);
-	}
-	/* When gethostname() truncates, it doesn't guarantee the trailing \0. */
-	buffer[bufsize - 1] = '\0';
-#else
-	DWORD bufsize_inout = bufsize;
-	if(!GetComputerName(buffer, &bufsize_inout)) {
-		strncpy(buffer, "-unknown-", bufsize);
-	}
-#endif
-}
-
 /**
  * \param do_prefix: Include a label like "File ", "Date ", etc. in the stamp data strings.
  * \param use_dynamic: Also include data that can change on a per-frame basis.
@@ -1744,7 +1709,7 @@ static void stampdata(Scene *scene, Object *camera, StampData *stamp_data, int d
 
 	if (scene->r.stamp & R_STAMP_HOSTNAME) {
 		char hostname[500];    /* sizeof(stamp_data->hostname) minus some bytes for a label. */
-		get_hostname(hostname, sizeof(hostname));
+		BLI_hostname_get(hostname, sizeof(hostname));
 		SNPRINTF(stamp_data->hostname, do_prefix ? "Hostname %s" : "%s", hostname);
 	}
 	else {

source/blender/blenlib/BLI_system.h

@@ -34,6 +34,18 @@ void BLI_system_backtrace(FILE *fp);
 /* Get CPU brand, result is to be MEM_freeN()-ed. */
 char *BLI_cpu_brand_string(void);
 
+/**
+ * Obtain the hostname from the system.
+ *
+ * This simply determines the host's name, and doesn't do any DNS lookup of any
+ * IP address of the machine. As such, it's only usable for identification
+ * purposes, and not for reachability over a network.
+ *
+ * @param buffer Character buffer to write the hostname into.
+ * @param bufsize Size of the character buffer, including trailing '\0'.
+ */
+void BLI_hostname_get(char *buffer, size_t bufsize);
+
 /* getpid */
 #ifdef WIN32
 #  define BLI_SYSTEM_PID_H <process.h>

source/blender/blenlib/intern/system.c

@@ -31,9 +31,10 @@
 
 #include "MEM_guardedalloc.h"
 
-/* for backtrace */
+/* for backtrace and gethostname/GetComputerName */
 #if defined(__linux__) || defined(__APPLE__)
 #  include <execinfo.h>
+#  include <unistd.h>
 #elif defined(WIN32)
 #  include <windows.h>
 #  include <dbghelp.h>
@@ -176,3 +177,19 @@ char *BLI_cpu_brand_string(void)
 	}
 	return NULL;
 }
+
+void BLI_hostname_get(char *buffer, size_t bufsize)
+{
+#ifndef WIN32
+	if (gethostname(buffer, bufsize-1) < 0) {
+		BLI_strncpy(buffer, "-unknown-", bufsize);
+	}
+	/* When gethostname() truncates, it doesn't guarantee the trailing \0. */
+	buffer[bufsize - 1] = '\0';
+#else
+	DWORD bufsize_inout = bufsize;
+	if(!GetComputerName(buffer, &bufsize_inout)) {
+		strncpy(buffer, "-unknown-", bufsize);
+	}
+#endif
+}