shithub: jbig2

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jbig2dec: Check that header version matches library version.

--- a/jbig2.c

+++ b/jbig2.c

@@ -100,9 +100,18 @@

 }

 Jbig2Ctx *

-jbig2_ctx_new(Jbig2Allocator *allocator, Jbig2Options options, Jbig2GlobalCtx *global_ctx, Jbig2ErrorCallback error_callback, void *error_callback_data)

+jbig2_ctx_new_imp(Jbig2Allocator *allocator, Jbig2Options options, Jbig2GlobalCtx *global_ctx, Jbig2ErrorCallback error_callback, void *error_callback_data, int jbig2_version_major, int jbig2_version_minor)

 {

     Jbig2Ctx *result;

+

+    if (jbig2_version_major != JBIG2_VERSION_MAJOR || jbig2_version_minor != JBIG2_VERSION_MINOR) {

+        Jbig2Ctx fakectx;

+        fakectx.error_callback = error_callback;

+        fakectx.error_callback_data = error_callback_data;

+        jbig2_error(&fakectx, JBIG2_SEVERITY_FATAL, -1, "incompatible jbig2dec header (%d.%d) and library (%d.%d) versions",

+            jbig2_version_major, jbig2_version_minor, JBIG2_VERSION_MAJOR, JBIG2_VERSION_MINOR);

+        return NULL;

+    }

     if (allocator == NULL)

         allocator = &jbig2_default_allocator;

--- a/jbig2.h

+++ b/jbig2.h

@@ -80,8 +80,14 @@

 };

 /* decoder context */

-Jbig2Ctx *jbig2_ctx_new(Jbig2Allocator *allocator,

-                        Jbig2Options options, Jbig2GlobalCtx *global_ctx, Jbig2ErrorCallback error_callback, void *error_callback_data);

+#define jbig2_ctx_new(allocator, options, global_ctx, error_callback, error_callback_data) jbig2_ctx_new_imp((allocator), (options), (global_ctx), (error_callback), (error_callback_data), JBIG2_VERSION_MAJOR, JBIG2_VERSION_MINOR)

+Jbig2Ctx *jbig2_ctx_new_imp(Jbig2Allocator *allocator,

+                        Jbig2Options options,

+                        Jbig2GlobalCtx *global_ctx,

+                        Jbig2ErrorCallback error_callback,

+                        void *error_callback_data,

+                        int jbig2_version_major,

+                        int jbig2_version_minor);

 Jbig2Allocator *jbig2_ctx_free(Jbig2Ctx *ctx);

 /* global context for embedded streams */