Huw Davies : wineoss: Return offsets rather than ptrs to the strings.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: be15ed1d578d14e47a110e6c9b0e944ece9fabd6
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=be15ed1d578d14e47a110e6c9b0e944ece9fabd6

Author: Huw Davies <huw at codeweavers.com>
Date:   Wed May  4 07:54:24 2022 +0100

wineoss: Return offsets rather than ptrs to the strings.

This will make the Wow64 syscall rather simpler.

Signed-off-by: Huw Davies <huw at codeweavers.com>
Signed-off-by: Jacek Caban <jacek at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/wineoss.drv/mmdevdrv.c | 12 +++++++-----
 dlls/wineoss.drv/oss.c      | 18 ++++++++----------
 dlls/wineoss.drv/unixlib.h  |  4 ++--
 3 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/dlls/wineoss.drv/mmdevdrv.c b/dlls/wineoss.drv/mmdevdrv.c
index c9aae98ec2e..9c1261ce05c 100644
--- a/dlls/wineoss.drv/mmdevdrv.c
+++ b/dlls/wineoss.drv/mmdevdrv.c
@@ -390,8 +390,10 @@ HRESULT WINAPI AUDDRV_GetEndpointIDs(EDataFlow flow, WCHAR ***ids_out, GUID **gu
     }
 
     for(i = 0; i < params.num; i++){
-        unsigned int name_size = (wcslen(params.endpoints[i].name) + 1) * sizeof(WCHAR);
-        unsigned int dev_size = strlen(params.endpoints[i].device) + 1;
+        WCHAR *name = (WCHAR *)((char *)params.endpoints + params.endpoints[i].name);
+        char *device = (char *)params.endpoints + params.endpoints[i].device;
+        unsigned int name_size = (wcslen(name) + 1) * sizeof(WCHAR);
+        unsigned int dev_size = strlen(device) + 1;
         OSSDevice *oss_dev;
 
         ids[i] = HeapAlloc(GetProcessHeap(), 0, name_size);
@@ -401,12 +403,12 @@ HRESULT WINAPI AUDDRV_GetEndpointIDs(EDataFlow flow, WCHAR ***ids_out, GUID **gu
             params.result = E_OUTOFMEMORY;
             goto end;
         }
-        memcpy(ids[i], params.endpoints[i].name, name_size);
-        get_device_guid(flow, params.endpoints[i].device, guids + i);
+        memcpy(ids[i], name, name_size);
+        get_device_guid(flow, device, guids + i);
 
         oss_dev->flow = flow;
         oss_dev->guid = guids[i];
-        memcpy(oss_dev->devnode, params.endpoints[i].device, dev_size);
+        memcpy(oss_dev->devnode, device, dev_size);
         device_add(oss_dev);
     }
     *def_index = params.default_idx;
diff --git a/dlls/wineoss.drv/oss.c b/dlls/wineoss.drv/oss.c
index a628548ddcd..986ed274445 100644
--- a/dlls/wineoss.drv/oss.c
+++ b/dlls/wineoss.drv/oss.c
@@ -226,11 +226,10 @@ static NTSTATUS get_endpoint_ids(void *args)
         WCHAR name[ARRAY_SIZE(ai.name) + ARRAY_SIZE(outW)];
         char device[OSS_DEVNODE_SIZE];
     } *info;
-    unsigned int i, j, num, needed, name_len, device_len, default_idx = 0;
+    unsigned int i, j, num, needed, name_len, device_len, offset, default_idx = 0;
     char default_device[OSS_DEVNODE_SIZE];
     struct endpoint *endpoint;
     int mixer_fd;
-    char *ptr;
 
     mixer_fd = open("/dev/mixer", O_RDONLY, 0);
     if(mixer_fd < 0){
@@ -333,9 +332,8 @@ static NTSTATUS get_endpoint_ids(void *args)
     }
     close(mixer_fd);
 
-    needed = num * sizeof(*params->endpoints);
+    offset = needed = num * sizeof(*params->endpoints);
     endpoint = params->endpoints;
-    ptr = (char *)(endpoint + num);
 
     for(i = 0; i < num; i++){
         name_len = wcslen(info[i].name) + 1;
@@ -343,12 +341,12 @@ static NTSTATUS get_endpoint_ids(void *args)
         needed += name_len * sizeof(WCHAR) + ((device_len + 1) & ~1);
 
         if(needed <= params->size){
-            endpoint->name = (WCHAR *)ptr;
-            memcpy(endpoint->name, info[i].name, name_len * sizeof(WCHAR));
-            ptr += name_len * sizeof(WCHAR);
-            endpoint->device = ptr;
-            memcpy(endpoint->device, info[i].device, device_len);
-            ptr += (device_len + 1) & ~1;
+            endpoint->name = offset;
+            memcpy((char *)params->endpoints + offset, info[i].name, name_len * sizeof(WCHAR));
+            offset += name_len * sizeof(WCHAR);
+            endpoint->device = offset;
+            memcpy((char *)params->endpoints + offset, info[i].device, device_len);
+            offset += (device_len + 1) & ~1;
             endpoint++;
         }
     }
diff --git a/dlls/wineoss.drv/unixlib.h b/dlls/wineoss.drv/unixlib.h
index 278dfdbe612..208dec7f69d 100644
--- a/dlls/wineoss.drv/unixlib.h
+++ b/dlls/wineoss.drv/unixlib.h
@@ -36,8 +36,8 @@ struct test_connect_params
 
 struct endpoint
 {
-    WCHAR *name;
-    char *device;
+    unsigned int name;
+    unsigned int device;
 };
 
 struct get_endpoint_ids_params