From d6cadad67550bc9ca6e180de9384f8e4ad74988f Mon Sep 17 00:00:00 2001
From: Sven Gestegard Robertz <sven.robertz@cs.lth.se>
Date: Mon, 26 Jan 2015 15:23:17 +0100
Subject: [PATCH] C code sending type defs and bindings.
---
compiler/2014/C_CodeGen.jrag | 43 ++++-
lib/c/2014/Makefile | 1 +
lib/c/2014/labcomm.c | 5 +
lib/c/2014/labcomm.h | 53 ------
lib/c/2014/labcomm_decoder.c | 6 +-
lib/c/2014/labcomm_encoder.c | 250 ++++++++++++++++++++++++++--
lib/c/2014/labcomm_private.h | 14 +-
lib/c/2014/labcomm_type_signature.c | 128 ++++++++++++++
lib/c/2014/labcomm_type_signature.h | 155 +++++++++++++++++
9 files changed, 580 insertions(+), 75 deletions(-)
create mode 100644 lib/c/2014/labcomm_type_signature.c
create mode 100644 lib/c/2014/labcomm_type_signature.h
diff --git a/compiler/2014/C_CodeGen.jrag b/compiler/2014/C_CodeGen.jrag
index c4c934b..b4709aa 100644
--- a/compiler/2014/C_CodeGen.jrag
+++ b/compiler/2014/C_CodeGen.jrag
@@ -1130,11 +1130,34 @@ aspect C_Encoder {
" not declared");
}
+ protected void Decl.C_emitEncoderTypeRegister(C_env env) {
+ env.println("int labcomm"+env.verStr+"_encoder_type_register_" +
+ env.prefix + getName() + "(");
+ env.indent();
+ env.println("struct labcomm"+env.verStr+"_encoder *e");
+ env.unindent();
+ env.println(")");
+ env.println("{");
+ env.indent();
+ env.println("//TODO: add error handling for dependencies");
+ C_emitUserTypeDeps(env, null, true); //XXX HERE BE DRAGONS
+ //currently set to false to turn off
+ //outputting of code
+ env.println("return labcomm"+env.verStr+"_internal_encoder_type_register(");
+ env.indent();
+ env.println("e,");
+ env.println("&signature_" + env.prefix + getName() + "");
+ env.unindent();
+ env.println(");");
+ env.unindent();
+ env.println("}");
+ }
public void TypeDecl.C_emitEncoderRegisterHandler(C_env env) {
- // do nothing for type decls
+ C_emitEncoderTypeRegister(env);
}
public void SampleDecl.C_emitEncoderRegisterHandler(C_env env) {
+ C_emitEncoderTypeRegister(env);
env.println("int labcomm"+env.verStr+"_encoder_register_" +
env.prefix + getName() + "(");
env.indent();
@@ -1146,17 +1169,23 @@ aspect C_Encoder {
C_emitUserTypeDeps(env, null, false); //XXX HERE BE DRAGONS
//currently set to false to turn off
//outputting of code
- env.println("return labcomm"+env.verStr+"_internal_encoder_register(");
+ env.println("int result = labcomm"+env.verStr+"_internal_encoder_register(");
env.indent();
env.println("e,");
env.println("&signature_" + env.prefix + getName() + ",");
env.println("(labcomm"+env.verStr+"_encoder_function)encode_" + env.prefix + getName());
env.unindent();
env.println(");");
+ env.println("labcomm"+env.verStr+"_encoder_type_register_" + env.prefix + getName()+"(e);");
+ env.println("labcomm"+env.verStr+"_internal_encoder_type_bind(");
+ env.indent();
+ env.println("e,");
+ env.println("&signature_" + env.prefix + getName() + ");");
+ env.unindent();
+ env.println("return result;");
env.unindent();
env.println("}");
}
-
}
aspect C_EncoderIoctl {
@@ -1206,7 +1235,7 @@ aspect C_TypeDependencies {
t.C_emitUserTypeDeps(env, t.getName(), outputCode);
if(outputCode) {
System.out.println("Decl.C_emitUserTypeDeps registering "+t.getName());
- env.println("labcomm"+env.verStr+"_encoder_register_"+env.prefix + t.getName()+"(e);");
+ env.println("labcomm"+env.verStr+"_encoder_type_register_"+env.prefix + t.getName()+"(e);");
} else { // Just output a comment
String refpath = (via == null) ? "directly" : "indirectly via "+via;
env.println(" //Depends ("+refpath+") on "+t.getName() );
@@ -1222,7 +1251,7 @@ aspect C_TypeDependencies {
t.C_emitUserTypeRefs(env, t.getName(), outputCode);
if(outputCode) {
- env.println("labcomm"+env.verStr+"_encoder_register_"+env.prefix + t.getName()+"(e);");
+ env.println("labcomm"+env.verStr+"_encoder_type_register_"+env.prefix + t.getName()+"(e);");
} else { // Just output a comment
String refpath = (via == null) ? "directly" : "indirectly via "+via;
env.println(" //Is referenced ("+refpath+") by "+t.getName() );
@@ -1454,9 +1483,9 @@ aspect C_Constructor {
}
public void Decl.C_emitConstructor(C_env env) {
- }
+// }
//XXX
- public void SampleDecl.C_emitConstructor(C_env env) {
+// public void SampleDecl.C_emitConstructor(C_env env) {
env.println("labcomm"+env.verStr+"_set_local_index(&signature_" +
env.prefix + getName() + ");");
}
diff --git a/lib/c/2014/Makefile b/lib/c/2014/Makefile
index 6742429..f71c292 100644
--- a/lib/c/2014/Makefile
+++ b/lib/c/2014/Makefile
@@ -20,6 +20,7 @@ OBJS=labcomm$(VERSION).o \
labcomm$(VERSION)_decoder.o \
labcomm$(VERSION)_dynamic_buffer_writer.o \
labcomm$(VERSION)_fd_reader.o \
+ labcomm$(VERSION)_type_signature.o \
labcomm$(VERSION)_fd_writer.o \
labcomm$(VERSION)_pthread_scheduler.o
diff --git a/lib/c/2014/labcomm.c b/lib/c/2014/labcomm.c
index a1994af..22da2e1 100644
--- a/lib/c/2014/labcomm.c
+++ b/lib/c/2014/labcomm.c
@@ -257,6 +257,11 @@ int labcomm_get_local_index(const struct labcomm_signature *signature)
return signature->index;
}
+int labcomm_get_local_type_index(const struct labcomm_signature *signature)
+{
+ return labcomm_get_local_index(signature);
+}
+
int labcomm_internal_sizeof(const struct labcomm_signature *signature,
void *v)
{
diff --git a/lib/c/2014/labcomm.h b/lib/c/2014/labcomm.h
index 5499184..8018c5b 100644
--- a/lib/c/2014/labcomm.h
+++ b/lib/c/2014/labcomm.h
@@ -39,59 +39,6 @@
struct labcomm_encoder;
struct labcomm_decoder;
-/*
- * Signature entry
- */
-#ifndef LABCOMM_NO_TYPEDECL
-#ifdef USE_UNIONS
-
-/* Useful for C99 and up (or GCC without -pedantic) */
-
-#define LABCOMM_SIGDEF_BYTES_OR_SIGNATURE \
- union { \
- char *bytes; \
- struct labcomm_signature* signature; \
- } u;
-
-#define LABCOMM_SIGDEF_BYTES(l, b) { l, .u.bytes=b }
-#define LABCOMM_SIGDEF_SIGNATURE(s) { 0, .u.signature=&s } // addressof, as s is pointing at the sig struct, not directly the the sig_bytes[]
-#define LABCOMM_SIGDEF_END { -1, .u.bytes=0 }
-
-#else
-
-#define LABCOMM_SIGDEF_BYTES_OR_SIGNATURE \
- struct { \
- char *bytes; \
- const struct labcomm_signature *signature; \
- } u;
-
-#define LABCOMM_SIGDEF_BYTES(l, b) { l, { b, 0 } }
-#define LABCOMM_SIGDEF_SIGNATURE(s) { 0, { 0, &s } }
-#define LABCOMM_SIGDEF_END { -1, { 0, 0 } }
-
-#endif
-
-struct labcomm_signature_data {
- int length;
- LABCOMM_SIGDEF_BYTES_OR_SIGNATURE
-};
-
-#endif
-struct labcomm_signature {
- char *name;
- int (*encoded_size)(void *); /* void* refers to sample_data */
- int size;
- unsigned char *signature;
- int index;
-#ifndef LABCOMM_NO_TYPEDECL
- int tdsize;
- struct labcomm_signature_data *treedata;
-#endif
-#ifdef LABCOMM_EXPERIMENTAL_CACHED_ENCODED_SIZE
- int cached_encoded_size; // -1 if not initialized or type is variable size
-#endif
-};
-
#include "labcomm_type_signature.h"
/*
* Error handling.
diff --git a/lib/c/2014/labcomm_decoder.c b/lib/c/2014/labcomm_decoder.c
index 54575ee..1d3c1f0 100644
--- a/lib/c/2014/labcomm_decoder.c
+++ b/lib/c/2014/labcomm_decoder.c
@@ -374,11 +374,15 @@ int labcomm_decoder_decode_one(struct labcomm_decoder *d)
result = decode_sample_def_or_ref(d, LABCOMM_SAMPLE_DEF);
} else if (remote_index == LABCOMM_SAMPLE_REF) {
result = decode_sample_def_or_ref(d, LABCOMM_SAMPLE_REF);
+ } else if (remote_index == LABCOMM_TYPE_DEF) {
+ result = decoder_skip(d, length, remote_index);
+ } else if (remote_index == LABCOMM_TYPE_BINDING) {
+ result = decoder_skip(d, length, remote_index);
} else if (remote_index == LABCOMM_PRAGMA) {
result = decode_pragma(d, d, length);
} else if (remote_index < LABCOMM_USER) {
fprintf(stderr, "SKIP %d %d\n", remote_index, length);
- result = remote_index;
+ result = decoder_skip(d, length, remote_index);
} else {
result = decode_and_handle(d, d, remote_index);
}
diff --git a/lib/c/2014/labcomm_encoder.c b/lib/c/2014/labcomm_encoder.c
index 4085bbd..f8fd9ae 100644
--- a/lib/c/2014/labcomm_encoder.c
+++ b/lib/c/2014/labcomm_encoder.c
@@ -24,6 +24,7 @@
#include "labcomm.h"
#include "labcomm_private.h"
#include "labcomm_ioctl.h"
+#include "labcomm_dynamic_buffer_writer.h"
struct labcomm_encoder {
struct labcomm_writer *writer;
@@ -32,13 +33,15 @@ struct labcomm_encoder {
struct labcomm_scheduler *scheduler;
LABCOMM_SIGNATURE_ARRAY_DEF(registered, int);
LABCOMM_SIGNATURE_ARRAY_DEF(sample_ref, int);
+ LABCOMM_SIGNATURE_ARRAY_DEF(typedefs, int);
};
-struct labcomm_encoder *labcomm_encoder_new(
+static struct labcomm_encoder *internal_encoder_new(
struct labcomm_writer *writer,
struct labcomm_error_handler *error,
struct labcomm_memory *memory,
- struct labcomm_scheduler *scheduler)
+ struct labcomm_scheduler *scheduler,
+ labcomm_bool outputVer)
{
struct labcomm_encoder *result;
@@ -58,25 +61,36 @@ struct labcomm_encoder *labcomm_encoder_new(
result->scheduler = scheduler;
LABCOMM_SIGNATURE_ARRAY_INIT(result->registered, int);
LABCOMM_SIGNATURE_ARRAY_INIT(result->sample_ref, int);
+ LABCOMM_SIGNATURE_ARRAY_INIT(result->typedefs, int);
labcomm_writer_alloc(result->writer,
result->writer->action_context);
- labcomm_writer_start(result->writer,
- result->writer->action_context,
- LABCOMM_VERSION, NULL, CURRENT_VERSION);
- labcomm_write_packed32(result->writer, LABCOMM_VERSION);
+ if(outputVer) {
+ labcomm_writer_start(result->writer,
+ result->writer->action_context,
+ LABCOMM_VERSION, NULL, CURRENT_VERSION);
+ labcomm_write_packed32(result->writer, LABCOMM_VERSION);
#ifdef LENGTH_INCL_TAG
- length = (labcomm_size_packed32(LABCOMM_VERSION) +
- labcomm_size_string(CURRENT_VERSION));
+ length = (labcomm_size_packed32(LABCOMM_VERSION) +
+ labcomm_size_string(CURRENT_VERSION));
#else
- length = labcomm_size_string(CURRENT_VERSION);
+ length = labcomm_size_string(CURRENT_VERSION);
#endif
- labcomm_write_packed32(result->writer, length);
- labcomm_write_string(result->writer, CURRENT_VERSION);
- labcomm_writer_end(result->writer, result->writer->action_context);
+ labcomm_write_packed32(result->writer, length);
+ labcomm_write_string(result->writer, CURRENT_VERSION);
+ labcomm_writer_end(result->writer, result->writer->action_context);
+ }
}
return result;
}
+struct labcomm_encoder *labcomm_encoder_new(
+ struct labcomm_writer *writer,
+ struct labcomm_error_handler *error,
+ struct labcomm_memory *memory,
+ struct labcomm_scheduler *scheduler)
+{
+ return internal_encoder_new(writer,error,memory,scheduler,TRUE);
+}
void labcomm_encoder_free(struct labcomm_encoder* e)
{
struct labcomm_memory *memory = e->memory;
@@ -86,7 +100,219 @@ void labcomm_encoder_free(struct labcomm_encoder* e)
LABCOMM_SIGNATURE_ARRAY_FREE(e->memory, e->sample_ref, int);
labcomm_memory_free(memory, 0, e);
}
+//================
+static struct labcomm_encoder * wrapped_begin(
+ struct labcomm_encoder *e) {
+ struct labcomm_writer *dyn_writer = labcomm_dynamic_buffer_writer_new(
+ e->memory);
+ struct labcomm_encoder *wrapped = internal_encoder_new(dyn_writer,
+ e->error,
+ e->memory,
+ e->scheduler,
+ FALSE);
+ return wrapped;
+}
+//HERE BE DRAGONS! Copied from decoder.c
+//Should this be moved to private_h?
+static int writer_ioctl(struct labcomm_writer *writer,
+ uint32_t action,
+ ...)
+{
+ int result;
+ va_list va;
+
+ if (LABCOMM_IOC_SIG(action) != LABCOMM_IOC_NOSIG) {
+ result = -EINVAL;
+ goto out;
+ }
+
+ va_start(va, action);
+ result = labcomm_writer_ioctl(writer, writer->action_context,
+ 0, NULL, action, va);
+ va_end(va);
+out:
+ return result;
+}
+
+
+int wrapped_end(struct labcomm_encoder *e, int tag, struct labcomm_encoder* wrapped)
+{
+//HERE BE DRAGONS!
+//We assume that the writer is a dynamic_buffer_writer
+ char* wrapped_data;
+ int err,len;
+ labcomm_writer_end(wrapped->writer, wrapped->writer->action_context);
+ err = writer_ioctl(wrapped->writer,
+ LABCOMM_IOCTL_WRITER_GET_BYTES_WRITTEN,
+ &len);
+ if (err < 0) {
+
+// HERE BE DRAGONS!
+// What is the difference between error_handler (where is it defined?)
+// and error_handler_callback. And why is the latter only in
+// the decoder struct?
+//
+// wrapped->on_error(LABCOMM_ERROR_BAD_WRITER, 2,
+// "Failed to get size: %s\n", strerror(-err));
+ fprintf(stderr, "BAD WRITER, Failed to get size> %s\n", strerror(-err));
+ err = -ENOENT;
+ goto free_encoder;
+ }
+ err = writer_ioctl(wrapped->writer,
+ LABCOMM_IOCTL_WRITER_GET_BYTE_POINTER,
+ &wrapped_data);
+ if (err < 0) {
+// wrapped->on_error(LABCOMM_ERROR_BAD_WRITER, 2,
+// "Failed to get pointer: %s\n", strerror(-err));
+ fprintf(stderr, "BAD WRITER, Failed to get pointer> %s\n", strerror(-err));
+ err = -ENOENT;
+ goto free_encoder;
+ }
+ {
+ int i;
+ err = labcomm_writer_start(e->writer, e->writer->action_context,
+ LABCOMM_TYPE_DEF, NULL, NULL);
+ if(err < 0) {
+ goto free_encoder;
+ }
+ labcomm_write_packed32(e->writer, tag);
+ labcomm_write_packed32(e->writer, len);
+ for(i=0; i<len;i++){
+ labcomm_write_byte(e->writer, wrapped_data[i]);
+ }
+ labcomm_writer_end(e->writer, e->writer->action_context);
+ err = e->writer->error;
+ }
+free_encoder:
+ //labcomm_memory_free(wrapped->memory, 1, ctx);
+ labcomm_encoder_free(wrapped);
+ return err;
+}
+//================
+
+// --------------
+#define TEST_MAP
+
+#ifdef TEST_MAP
+static void write_sig_byte(char b, const struct labcomm_signature *signature,
+ void *context)
+{
+ struct labcomm_encoder *e = context;
+ if(signature) {
+ labcomm_write_packed32(e->writer, labcomm_get_local_index(signature));
+ }else {
+ if (e->writer->pos >= e->writer->count) {
+ labcomm_writer_flush(e->writer, e->writer->action_context);
+ }
+ e->writer->data[e->writer->pos] = b;
+ e->writer->pos++;
+ }
+}
+#endif
+
+static void do_write_signature(struct labcomm_encoder * e, const struct labcomm_signature *signature, unsigned char flatten)
+{
+#ifdef TEST_MAP
+ map_signature(write_sig_byte, e, signature, flatten);
+#else
+ struct labcomm_signature_data* p = signature->signature;
+ while (p->length != -1) {
+ if (p->length) {
+ int i;
+ for ( i = 0 ; i < p->length ; i++) {
+ if (e->writer->pos >= e->writer->count) {
+ labcomm_writer_flush(e->writer, e->writer->action_context);
+ }
+ e->writer->data[e->writer->pos] = p->u.bytes[i];
+ e->writer->pos++;
+ }
+ } else {
+ if(p->u.signature == 0) printf("p->u.signature == null\n");
+ if(flatten) {
+ do_write_signature(e, p->u.signature, flatten);
+ } else {
+ labcomm_write_packed32(e->writer, labcomm_get_local_index(p->u.signature));
+ }
+ }
+ p+=1;
+ }
+#endif
+}
+
+static int internal_reg_type(
+ struct labcomm_encoder *e,
+ const struct labcomm_signature *signature,
+ labcomm_bool flatten)
+{
+ int result = -EINVAL;
+ int index, *done, err;
+ //int i:
+
+ index = labcomm_get_local_index(signature);
+ labcomm_scheduler_writer_lock(e->scheduler);
+ if (index <= 0) { goto out; }
+ done = LABCOMM_SIGNATURE_ARRAY_REF(e->memory, e->typedefs, int, index);
+ if (*done) { goto out; }
+ *done = 1;
+ err = labcomm_writer_start(e->writer, e->writer->action_context,
+ index, signature, NULL);
+ if (err == -EALREADY) { result = 0; goto out; }
+ if (err != 0) { result = err; goto out; }
+ labcomm_write_packed32(e->writer, index);
+ labcomm_write_string(e->writer, signature->name);
+ //XXX flush for debugging, can be removed when working
+ // labcomm_writer_flush(e->writer, e->writer->action_context);
+ do_write_signature(e, signature, FALSE);
+// for (i = 0 ; i < signature->size ; i++) {
+// if (e->writer->pos >= e->writer->count) {
+// labcomm_writer_flush(e->writer, e->writer->action_context);
+// }
+// e->writer->data[e->writer->pos] = signature->signature[i];
+// e->writer->pos++;
+// }
+ labcomm_writer_end(e->writer, e->writer->action_context);
+ result = e->writer->error;
+out:
+ labcomm_scheduler_writer_unlock(e->scheduler);
+ return result;
+}
+//--------------
+int labcomm_internal_encoder_type_register(
+ struct labcomm_encoder *e,
+ const struct labcomm_signature *signature)
+{
+ struct labcomm_encoder *w = wrapped_begin(e);
+ internal_reg_type(w, signature, FALSE);
+ return wrapped_end(e, LABCOMM_TYPE_DEF, w);
+}
+int labcomm_internal_encoder_type_bind(
+ struct labcomm_encoder *e,
+ const struct labcomm_signature *signature)
+{
+ int result = -EINVAL;
+ int err;
+ int sindex = labcomm_get_local_index(signature);
+ int tindex = labcomm_get_local_type_index(signature);
+ labcomm_scheduler_writer_lock(e->scheduler);
+ if(sindex <= 0 || tindex <= 0) {goto out;}
+ err = labcomm_writer_start(e->writer, e->writer->action_context,
+ LABCOMM_TYPE_BINDING, signature, NULL);
+ if (err == -EALREADY) { result = 0; goto out; }
+ if (err != 0) { result = err; goto out; }
+ int length = (labcomm_size_packed32(sindex) +
+ labcomm_size_packed32(tindex));
+ labcomm_write_packed32(e->writer, LABCOMM_TYPE_BINDING);
+ labcomm_write_packed32(e->writer, length);
+ labcomm_write_packed32(e->writer, sindex);
+ labcomm_write_packed32(e->writer, tindex);
+ labcomm_writer_end(e->writer, e->writer->action_context);
+ result = e->writer->error;
+
+out:
+ labcomm_scheduler_writer_unlock(e->scheduler);
+ return result;
+}
int labcomm_internal_encoder_register(
struct labcomm_encoder *e,
const struct labcomm_signature *signature,
diff --git a/lib/c/2014/labcomm_private.h b/lib/c/2014/labcomm_private.h
index 95900fe..a1792d0 100644
--- a/lib/c/2014/labcomm_private.h
+++ b/lib/c/2014/labcomm_private.h
@@ -42,8 +42,8 @@
#define LABCOMM_VERSION 0x01
#define LABCOMM_SAMPLE_DEF 0x02
#define LABCOMM_SAMPLE_REF 0x03
-#define LABCOMM_TYPEDEF 0x04
-#define LABCOMM_TYPEBINDING 0x05
+#define LABCOMM_TYPE_DEF 0x04
+#define LABCOMM_TYPE_BINDING 0x05
#define LABCOMM_PRAGMA 0x3f
#define LABCOMM_USER 0x40 /* ..0xffffffff */
@@ -364,6 +364,14 @@ int labcomm_writer_ioctl(struct labcomm_writer *w,
int index, const struct labcomm_signature *signature,
uint32_t ioctl_action, va_list args);
+int labcomm_internal_encoder_type_register(
+ struct labcomm_encoder *e,
+ const struct labcomm_signature *signature);
+
+int labcomm_internal_encoder_type_bind(
+ struct labcomm_encoder *e,
+ const struct labcomm_signature *signature);
+
int labcomm_internal_encoder_register(
struct labcomm_encoder *encoder,
const struct labcomm_signature *signature,
@@ -543,4 +551,6 @@ void labcomm_set_local_index(struct labcomm_signature *signature);
/* Get the local index for a signature */
int labcomm_get_local_index(const struct labcomm_signature *s);
+int labcomm_get_local_type_index(const struct labcomm_signature *s);
+
#endif
diff --git a/lib/c/2014/labcomm_type_signature.c b/lib/c/2014/labcomm_type_signature.c
new file mode 100644
index 0000000..3cb9cc3
--- /dev/null
+++ b/lib/c/2014/labcomm_type_signature.c
@@ -0,0 +1,128 @@
+#include "labcomm.h"
+#include <string.h> // for memcmp
+#include <stdio.h> // for debug printf
+
+/* Dump signature bytes on stdout
+ */
+
+void labcomm_signature_print(struct labcomm_signature_data *signature)
+{
+ struct labcomm_signature_data *p = signature ;
+ while (p->length != -1) {
+ if (p->length) {
+ int i;
+ for ( i = 0 ; i < p->length ; i++) {
+ printf("%02x ", p->u.bytes[i]);
+ }
+ } else if(p->u.signature){
+ labcomm_signature_print(p->u.signature->treedata);
+ } else {
+ printf("neither data nor ref, bailing out.\n");
+ return;
+ }
+ p+=1;
+ }
+ printf("\n");
+}
+static labcomm_bool sig_dump_checked(struct labcomm_signature_data *signature,
+ char *buf, int *len, int buflen);
+
+/* buf (out) : byte array to write signature into
+ len (in/out): input: buf size, out: signature length
+
+ return TRUE if aborted due to overrun
+ */
+labcomm_bool labcomm_signature_dump(struct labcomm_signature_data *signature,
+ char *buf, int *len)
+{
+ int buflen = *len;
+ *len = 0;
+ return sig_dump_checked(signature, buf, len, buflen);
+}
+
+/* internal function with bounds checking for buf.
+ * buflen: capacity of buf
+ */
+static labcomm_bool sig_dump_checked(struct labcomm_signature_data *signature,
+ char *buf, int *len, int buflen)
+{
+ struct labcomm_signature_data *p = signature;
+ while ( (p->length != -1) && (*len < buflen)) {
+ if (p->length) {
+ int i;
+ for ( i = 0 ; (i < p->length) && (*len < buflen); i++) {
+ *buf++ = p->u.bytes[i];
+ ++*len;
+ }
+ } else if(p->u.signature){
+ int tmplen=*len;
+ //recursing. c.f. dump()
+ sig_dump_checked(p->u.signature->treedata, buf, len, buflen);
+ int inner_len = *len-tmplen;
+ buf += inner_len;
+ } else {
+ //printf("neither data nor ref, bailing out.\n");
+ return TRUE;
+ }
+ p+=1;
+ }
+ return (*len >= buflen);
+}
+
+/* compare signature (flattened, if needed) to other
+ return TRUE if equal
+*/
+labcomm_bool labcomm_signature_cmp( struct labcomm_signature_data *s1,
+ struct labcomm_signature_data *s2)
+{
+ int buflen=512;
+ char buf1[buflen];
+ int len1=buflen;
+ char buf2[buflen];
+ int len2=buflen;
+ labcomm_bool res1 = labcomm_signature_dump(s1, buf1, &len1);
+ labcomm_bool res2 = labcomm_signature_dump(s2, buf2, &len2);
+ if(res1 || res2) {
+ printf("WARNING: OVERRUN\n");
+ return FALSE;
+ } else {
+ return(len1 == len2 && memcmp(buf1, buf2, len1)==0);
+ }
+}
+/* maps a function f(char b, struct labcomm_signature *s, void *context)
+ * on each byte (or type ref) in the signature.
+ *
+ * If flatten, the signature is flattened to a byte array, and the
+ * second argument to f is always zero.
+ *
+ * Otherwise, when a type ref is encountered, f is called with the first
+ * argument zero and the referenced type as the second argument.
+ *
+ * The context parameter is passed on, unaltered, to f
+ */
+void map_signature( void(*f)(char, const struct labcomm_signature *, void *),
+ void *context,
+ const struct labcomm_signature *signature, labcomm_bool flatten)
+{
+ struct labcomm_signature_data* p = signature->treedata;
+ while (p->length != -1) {
+ //fprintf(stderr, "%p %x\n", p, p->length);
+ if (p->length) {
+ int i;
+ for ( i = 0 ; i < p->length ; i++) {
+ (*f)(p->u.bytes[i], 0, context);
+ }
+ } else if (p->u.signature) {
+ if(p->u.signature == 0) printf("p->u.signature == null\n");
+ if(flatten) {
+ map_signature(f, context, p->u.signature, flatten);
+ } else {
+ (*f)(0, p->u.signature, context);
+ }
+ } else {
+ fprintf(stderr, "neither data nor ref, bailing out.\n");
+ return;
+ }
+ p+=1;
+ }
+}
diff --git a/lib/c/2014/labcomm_type_signature.h b/lib/c/2014/labcomm_type_signature.h
new file mode 100644
index 0000000..44549aa
--- /dev/null
+++ b/lib/c/2014/labcomm_type_signature.h
@@ -0,0 +1,155 @@
+#ifndef LABCOMM_TYPE_SIGNATURE_H
+#define LABCOMM_TYPE_SIGNATURE_H
+
+//XXX move to common.h
+#ifndef labcomm_bool
+#define labcomm_bool char
+#define TRUE 1
+#define FALSE 0
+#endif
+
+/*
+ * Signature entry
+ */
+#ifndef LABCOMM_NO_TYPEDECL
+#ifdef USE_UNIONS
+
+/* Useful for C99 and up (or GCC without -pedantic) */
+
+#define LABCOMM_SIGDEF_BYTES_OR_SIGNATURE \
+ union { \
+ char *bytes; \
+ struct labcomm_signature* signature; \
+ } u;
+
+#define LABCOMM_SIGDEF_BYTES(l, b) { l, .u.bytes=b }
+#define LABCOMM_SIGDEF_SIGNATURE(s) { 0, .u.signature=&s } // addressof, as s is pointing at the sig struct, not directly the the sig_bytes[]
+#define LABCOMM_SIGDEF_END { -1, .u.bytes=0 }
+
+#else
+
+#define LABCOMM_SIGDEF_BYTES_OR_SIGNATURE \
+ struct { \
+ char *bytes; \
+ const struct labcomm_signature *signature; \
+ } u;
+
+#define LABCOMM_SIGDEF_BYTES(l, b) { l, { b, 0 } }
+#define LABCOMM_SIGDEF_SIGNATURE(s) { 0, { 0, &s } }
+#define LABCOMM_SIGDEF_END { -1, { 0, 0 } }
+
+#endif
+
+struct labcomm_signature_data {
+ int length;
+ LABCOMM_SIGDEF_BYTES_OR_SIGNATURE
+};
+
+#endif
+struct labcomm_signature {
+ char *name;
+ int (*encoded_size)(void *); /* void* refers to sample_data */
+ int size;
+ unsigned char *signature;
+ int index;
+#ifndef LABCOMM_NO_TYPEDECL
+ int tdsize;
+ struct labcomm_signature_data *treedata;
+#endif
+#ifdef LABCOMM_EXPERIMENTAL_CACHED_ENCODED_SIZE
+ int cached_encoded_size; // -1 if not initialized or type is variable size
+#endif
+};
+
+#if 0
+/*
+ * Signature entry
+ */
+
+#ifdef USE_UNIONS
+
+/* Useful for C99 and up (or GCC without -pedantic) */
+
+#define LABCOMM_SIGDEF_BYTES_OR_SIGNATURE \
+ union { \
+ char *bytes; \
+ struct labcomm_signature* signature; \
+ } u;
+
+#define LABCOMM_SIGDEF_BYTES(l, b) { l, .u.bytes=b }
+#define LABCOMM_SIGDEF_SIGNATURE(s) { 0, .u.signature=&s } // addressof, as s is pointing at the sig struct, not directly the the sig_bytes[]
+#define LABCOMM_SIGDEF_END { -1, .u.bytes=0 }
+
+#else
+
+#define LABCOMM_SIGDEF_BYTES_OR_SIGNATURE \
+ struct { \
+ char *bytes; \
+ struct labcomm_signature *signature; \
+ } u;
+
+#define LABCOMM_SIGDEF_BYTES(l, b) { l, { b, 0 } }
+#define LABCOMM_SIGDEF_SIGNATURE(s) { 0, { 0, &s } }
+#define LABCOMM_SIGDEF_END { -1, { 0, 0 } }
+
+#endif
+
+struct labcomm_signature_data {
+ int length;
+ LABCOMM_SIGDEF_BYTES_OR_SIGNATURE
+};
+
+struct labcomm_signature {
+ int type;
+ char *name;
+ int (*encoded_size)(struct labcomm_signature *, void *); // void * == encoded_sample *
+ struct {
+ int size;
+ unsigned char *data;
+ } flat;
+ struct {
+ int size;
+ struct labcomm_signature_data *data;
+ } tree;
+ int index;
+#ifdef LABCOMM_EXPERIMENTAL_CACHED_ENCODED_SIZE
+ int cached_encoded_size; // -1 if not initialized or type is variable size
+#endif
+};
+#endif
+/*
+ * functions
+ */
+
+
+/* Dump signature bytes on stdout
+ */
+
+void labcomm_signature_print(struct labcomm_signature_data *signature);
+
+/* compare signatures (flattened, if needed) to other
+* return TRUE if equal
+*/
+labcomm_bool labcomm_signature_cmp( struct labcomm_signature_data *s2,
+ struct labcomm_signature_data *s1);
+
+/* flatten and dump signature to a byte array.
+ * buf (out) : byte array to write signature into
+ * len (in/out): input: buf size, out: signature length
+ *
+ * return TRUE if aborted due to overrun
+ */
+labcomm_bool labcomm_signature_dump(struct labcomm_signature_data *signature,
+ char *buf, int *len);
+
+/* maps function f on each byte in the signature
+ * if flatten, the signature is flattened, and the second argument of
+ * f is always zero
+ * otherwise, when a type ref is encountered, f is called with the first
+ * argument zero and the type ref as the second argument.
+ */
+void map_signature( void(*f)(char, const struct labcomm_signature *, void *),
+ void *context,
+ const struct labcomm_signature *signature, labcomm_bool flatten);
+
+#endif
--
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