[PATCH vkd3d v3 2/2] vkd3d-shader: Allocate memory for a string buffer at init time.

[Matteo Bruni]

Signed-off-by: Matteo Bruni 
---
It turns out that the solution in v2 didn't quite work because
preproc_add_macro() (and possibly others) copies a struct
vkd3d_string_buffer around. Rather than making that invalid, let's go
entirely the other way: always allocate a small buffer at init time
and, if that fails, simply crash: the situation is hopeless.

libs/vkd3d-shader/vkd3d_shader_main.c | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/libs/vkd3d-shader/vkd3d_shader_main.c b/libs/vkd3d-shader/vkd3d_shader_main.c
index e7afbdfc..79bb9023 100644
--- a/libs/vkd3d-shader/vkd3d_shader_main.c
+++ b/libs/vkd3d-shader/vkd3d_shader_main.c
@@ -25,7 +25,11 @@ VKD3D_DEBUG_ENV_NAME("VKD3D_SHADER_DEBUG");

void vkd3d_string_buffer_init(struct vkd3d_string_buffer *buffer)
 {
-    memset(buffer, 0, sizeof(*buffer));
+    buffer->buffer_size = 16;
+    buffer->content_size = 0;
+    buffer->buffer = vkd3d_malloc(buffer->buffer_size);
+    assert(buffer->buffer);
+    memset(buffer->buffer, 0, buffer->buffer_size);
 }

void vkd3d_string_buffer_cleanup(struct vkd3d_string_buffer *buffer)
@@ -58,9 +62,6 @@ int vkd3d_string_buffer_vprintf(struct vkd3d_string_buffer *buffer, const char *
     va_list a;
     int rc;

-    if (!buffer->content_size && !vkd3d_string_buffer_resize(buffer, 32))
-        return -1;
-
     for (;;)
     {
         rem = buffer->buffer_size - buffer->content_size;
@@ -139,11 +140,6 @@ struct vkd3d_string_buffer *vkd3d_string_buffer_get(struct vkd3d_string_buffer_c
         if (!(buffer = vkd3d_malloc(sizeof(*buffer))))
             return NULL;
         vkd3d_string_buffer_init(buffer);
-        if (!vkd3d_string_buffer_resize(buffer, 1))
-        {
-            vkd3d_free(buffer);
-            return NULL;
-        }
     }
     else
     {