X-Git-Url: http://git.efficios.com/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fvendor%2Fmsgpack%2Funpack.c;fp=src%2Fvendor%2Fmsgpack%2Funpack.c;h=b390f58684661249545c64764a37ab337165a691;hp=0000000000000000000000000000000000000000;hb=2463b7879c00298daa79744cdaae82ac061a4ed8;hpb=3a4595c2469472dee1656cde5f8882c2123efd3c

diff --git a/src/vendor/msgpack/unpack.c b/src/vendor/msgpack/unpack.c
new file mode 100644
index 000000000..b390f5868
--- /dev/null
+++ b/src/vendor/msgpack/unpack.c
@@ -0,0 +1,702 @@
+/*
+ * MessagePack for C unpacking routine
+ *
+ * Copyright (C) 2008-2009 FURUHASHI Sadayuki
+ *
+ *    Distributed under the Boost Software License, Version 1.0.
+ *    (See accompanying file LICENSE_1_0.txt or copy at
+ *    http://www.boost.org/LICENSE_1_0.txt)
+ */
+#include "vendor/msgpack/unpack.h"
+#include "vendor/msgpack/unpack_define.h"
+#include "vendor/msgpack/util.h"
+#include <stdlib.h>
+
+#ifdef _msgpack_atomic_counter_header
+#include _msgpack_atomic_counter_header
+#endif
+
+
+typedef struct {
+    msgpack_zone** z;
+    bool referenced;
+} unpack_user;
+
+
+#define msgpack_unpack_struct(name) \
+    struct template ## name
+
+#define msgpack_unpack_func(ret, name) \
+    ret template ## name
+
+#define msgpack_unpack_callback(name) \
+    template_callback ## name
+
+#define msgpack_unpack_object msgpack_object
+
+#define msgpack_unpack_user unpack_user
+
+
+struct template_context;
+typedef struct template_context template_context;
+
+static void template_init(template_context* ctx);
+
+static msgpack_object template_data(template_context* ctx);
+
+static int template_execute(
+    template_context* ctx, const char* data, size_t len, size_t* off);
+
+
+static inline msgpack_object template_callback_root(unpack_user* u)
+{
+    msgpack_object o;
+    MSGPACK_UNUSED(u);
+    o.type = MSGPACK_OBJECT_NIL;
+    return o;
+}
+
+static inline int template_callback_uint8(unpack_user* u, uint8_t d, msgpack_object* o)
+{
+    MSGPACK_UNUSED(u);
+    o->type = MSGPACK_OBJECT_POSITIVE_INTEGER;
+    o->via.u64 = d;
+    return 0;
+}
+
+static inline int template_callback_uint16(unpack_user* u, uint16_t d, msgpack_object* o)
+{
+    MSGPACK_UNUSED(u);
+    o->type = MSGPACK_OBJECT_POSITIVE_INTEGER;
+    o->via.u64 = d;
+    return 0;
+}
+
+static inline int template_callback_uint32(unpack_user* u, uint32_t d, msgpack_object* o)
+{
+    MSGPACK_UNUSED(u);
+    o->type = MSGPACK_OBJECT_POSITIVE_INTEGER;
+    o->via.u64 = d;
+    return 0;
+}
+
+static inline int template_callback_uint64(unpack_user* u, uint64_t d, msgpack_object* o)
+{
+    MSGPACK_UNUSED(u);
+    o->type = MSGPACK_OBJECT_POSITIVE_INTEGER;
+    o->via.u64 = d;
+    return 0;
+}
+
+static inline int template_callback_int8(unpack_user* u, int8_t d, msgpack_object* o)
+{
+    MSGPACK_UNUSED(u);
+    if(d >= 0) {
+        o->type = MSGPACK_OBJECT_POSITIVE_INTEGER;
+        o->via.u64 = (uint64_t)d;
+        return 0;
+    }
+    else {
+        o->type = MSGPACK_OBJECT_NEGATIVE_INTEGER;
+        o->via.i64 = d;
+        return 0;
+    }
+}
+
+static inline int template_callback_int16(unpack_user* u, int16_t d, msgpack_object* o)
+{
+    MSGPACK_UNUSED(u);
+    if(d >= 0) {
+        o->type = MSGPACK_OBJECT_POSITIVE_INTEGER;
+        o->via.u64 = (uint64_t)d;
+        return 0;
+    }
+    else {
+        o->type = MSGPACK_OBJECT_NEGATIVE_INTEGER;
+        o->via.i64 = d;
+        return 0;
+    }
+}
+
+static inline int template_callback_int32(unpack_user* u, int32_t d, msgpack_object* o)
+{
+    MSGPACK_UNUSED(u);
+    if(d >= 0) {
+        o->type = MSGPACK_OBJECT_POSITIVE_INTEGER;
+        o->via.u64 = (uint64_t)d;
+        return 0;
+    }
+    else {
+        o->type = MSGPACK_OBJECT_NEGATIVE_INTEGER;
+        o->via.i64 = d;
+        return 0;
+    }
+}
+
+static inline int template_callback_int64(unpack_user* u, int64_t d, msgpack_object* o)
+{
+    MSGPACK_UNUSED(u);
+    if(d >= 0) {
+        o->type = MSGPACK_OBJECT_POSITIVE_INTEGER;
+        o->via.u64 = (uint64_t)d;
+        return 0;
+    }
+    else {
+        o->type = MSGPACK_OBJECT_NEGATIVE_INTEGER;
+        o->via.i64 = d;
+        return 0;
+    }
+}
+
+static inline int template_callback_float(unpack_user* u, float d, msgpack_object* o)
+{
+    MSGPACK_UNUSED(u);
+    o->type = MSGPACK_OBJECT_FLOAT32;
+    o->via.f64 = d;
+    return 0;
+}
+
+static inline int template_callback_double(unpack_user* u, double d, msgpack_object* o)
+{
+    MSGPACK_UNUSED(u);
+    o->type = MSGPACK_OBJECT_FLOAT64;
+    o->via.f64 = d;
+    return 0;
+}
+
+static inline int template_callback_nil(unpack_user* u, msgpack_object* o)
+{
+    MSGPACK_UNUSED(u);
+    o->type = MSGPACK_OBJECT_NIL;
+    return 0;
+}
+
+static inline int template_callback_true(unpack_user* u, msgpack_object* o)
+{
+    MSGPACK_UNUSED(u);
+    o->type = MSGPACK_OBJECT_BOOLEAN;
+    o->via.boolean = true;
+    return 0;
+}
+
+static inline int template_callback_false(unpack_user* u, msgpack_object* o)
+{
+    MSGPACK_UNUSED(u);
+    o->type = MSGPACK_OBJECT_BOOLEAN;
+    o->via.boolean = false;
+    return 0;
+}
+
+static inline int template_callback_array(unpack_user* u, unsigned int n, msgpack_object* o)
+{
+    size_t size;
+    // Let's leverage the fact that sizeof(msgpack_object) is a compile time constant
+    // to check for int overflows.
+    // Note - while n is constrained to 32-bit, the product of n * sizeof(msgpack_object)
+    // might not be constrained to 4GB on 64-bit systems
+#if SIZE_MAX == UINT_MAX
+    if (n > SIZE_MAX/sizeof(msgpack_object))
+        return MSGPACK_UNPACK_NOMEM_ERROR;
+#endif
+
+    o->type = MSGPACK_OBJECT_ARRAY;
+    o->via.array.size = 0;
+
+    size = n * sizeof(msgpack_object);
+
+    if (*u->z == NULL) {
+        *u->z = msgpack_zone_new(MSGPACK_ZONE_CHUNK_SIZE);
+        if(*u->z == NULL) {
+            return MSGPACK_UNPACK_NOMEM_ERROR;
+        }
+    }
+
+    // Unsure whether size = 0 should be an error, and if so, what to return
+    o->via.array.ptr = (msgpack_object*)msgpack_zone_malloc(*u->z, size);
+    if(o->via.array.ptr == NULL) { return MSGPACK_UNPACK_NOMEM_ERROR; }
+    return 0;
+}
+
+static inline int template_callback_array_item(unpack_user* u, msgpack_object* c, msgpack_object o)
+{
+    MSGPACK_UNUSED(u);
+#if defined(__GNUC__) && !defined(__clang__)
+    memcpy(&c->via.array.ptr[c->via.array.size], &o, sizeof(msgpack_object));
+#else  /* __GNUC__ && !__clang__ */
+    c->via.array.ptr[c->via.array.size] = o;
+#endif /* __GNUC__ && !__clang__ */
+    ++c->via.array.size;
+    return 0;
+}
+
+static inline int template_callback_map(unpack_user* u, unsigned int n, msgpack_object* o)
+{
+    size_t size;
+    // Let's leverage the fact that sizeof(msgpack_object_kv) is a compile time constant
+    // to check for int overflows
+    // Note - while n is constrained to 32-bit, the product of n * sizeof(msgpack_object)
+    // might not be constrained to 4GB on 64-bit systems
+
+    // Note - this will always be false on 64-bit systems
+#if SIZE_MAX == UINT_MAX
+    if (n > SIZE_MAX/sizeof(msgpack_object_kv))
+        return MSGPACK_UNPACK_NOMEM_ERROR;
+#endif
+
+    o->type = MSGPACK_OBJECT_MAP;
+    o->via.map.size = 0;
+
+    size = n * sizeof(msgpack_object_kv);
+
+    if (*u->z == NULL) {
+        *u->z = msgpack_zone_new(MSGPACK_ZONE_CHUNK_SIZE);
+        if(*u->z == NULL) {
+            return MSGPACK_UNPACK_NOMEM_ERROR;
+        }
+    }
+
+    // Should size = 0 be an error? If so, what error to return?
+    o->via.map.ptr = (msgpack_object_kv*)msgpack_zone_malloc(*u->z, size);
+    if(o->via.map.ptr == NULL) { return MSGPACK_UNPACK_NOMEM_ERROR; }
+    return 0;
+}
+
+static inline int template_callback_map_item(unpack_user* u, msgpack_object* c, msgpack_object k, msgpack_object v)
+{
+    MSGPACK_UNUSED(u);
+#if defined(__GNUC__) && !defined(__clang__)
+    memcpy(&c->via.map.ptr[c->via.map.size].key, &k, sizeof(msgpack_object));
+    memcpy(&c->via.map.ptr[c->via.map.size].val, &v, sizeof(msgpack_object));
+#else  /* __GNUC__ && !__clang__ */
+    c->via.map.ptr[c->via.map.size].key = k;
+    c->via.map.ptr[c->via.map.size].val = v;
+#endif /* __GNUC__ && !__clang__ */
+    ++c->via.map.size;
+    return 0;
+}
+
+static inline int template_callback_str(unpack_user* u, const char* b, const char* p, unsigned int l, msgpack_object* o)
+{
+    MSGPACK_UNUSED(b);
+    if (*u->z == NULL) {
+        *u->z = msgpack_zone_new(MSGPACK_ZONE_CHUNK_SIZE);
+        if(*u->z == NULL) {
+            return MSGPACK_UNPACK_NOMEM_ERROR;
+        }
+    }
+    o->type = MSGPACK_OBJECT_STR;
+    o->via.str.ptr = p;
+    o->via.str.size = l;
+    u->referenced = true;
+    return 0;
+}
+
+static inline int template_callback_bin(unpack_user* u, const char* b, const char* p, unsigned int l, msgpack_object* o)
+{
+    MSGPACK_UNUSED(b);
+    if (*u->z == NULL) {
+        *u->z = msgpack_zone_new(MSGPACK_ZONE_CHUNK_SIZE);
+        if(*u->z == NULL) {
+            return MSGPACK_UNPACK_NOMEM_ERROR;
+        }
+    }
+    o->type = MSGPACK_OBJECT_BIN;
+    o->via.bin.ptr = p;
+    o->via.bin.size = l;
+    u->referenced = true;
+    return 0;
+}
+
+static inline int template_callback_ext(unpack_user* u, const char* b, const char* p, unsigned int l, msgpack_object* o)
+{
+    MSGPACK_UNUSED(b);
+    if (l == 0) {
+        return MSGPACK_UNPACK_PARSE_ERROR;
+    }
+    if (*u->z == NULL) {
+        *u->z = msgpack_zone_new(MSGPACK_ZONE_CHUNK_SIZE);
+        if(*u->z == NULL) {
+            return MSGPACK_UNPACK_NOMEM_ERROR;
+        }
+    }
+    o->type = MSGPACK_OBJECT_EXT;
+    o->via.ext.type = *p;
+    o->via.ext.ptr = p + 1;
+    o->via.ext.size = l - 1;
+    u->referenced = true;
+    return 0;
+}
+
+#include "vendor/msgpack/unpack_template.h"
+
+
+#define CTX_CAST(m) ((template_context*)(m))
+#define CTX_REFERENCED(mpac) CTX_CAST((mpac)->ctx)->user.referenced
+
+#define COUNTER_SIZE (sizeof(_msgpack_atomic_counter_t))
+
+
+static inline void init_count(void* buffer)
+{
+    *(volatile _msgpack_atomic_counter_t*)buffer = 1;
+}
+
+static inline void decr_count(void* buffer)
+{
+    // atomic if(--*(_msgpack_atomic_counter_t*)buffer == 0) { free(buffer); }
+    if(_msgpack_sync_decr_and_fetch((volatile _msgpack_atomic_counter_t*)buffer) == 0) {
+        free(buffer);
+    }
+}
+
+static inline void incr_count(void* buffer)
+{
+    // atomic ++*(_msgpack_atomic_counter_t*)buffer;
+    _msgpack_sync_incr_and_fetch((volatile _msgpack_atomic_counter_t*)buffer);
+}
+
+static inline _msgpack_atomic_counter_t get_count(void* buffer)
+{
+    return *(volatile _msgpack_atomic_counter_t*)buffer;
+}
+
+bool msgpack_unpacker_init(msgpack_unpacker* mpac, size_t initial_buffer_size)
+{
+    char* buffer;
+    void* ctx;
+
+    if(initial_buffer_size < COUNTER_SIZE) {
+        initial_buffer_size = COUNTER_SIZE;
+    }
+
+    buffer = (char*)malloc(initial_buffer_size);
+    if(buffer == NULL) {
+        return false;
+    }
+
+    ctx = malloc(sizeof(template_context));
+    if(ctx == NULL) {
+        free(buffer);
+        return false;
+    }
+
+    mpac->buffer = buffer;
+    mpac->used = COUNTER_SIZE;
+    mpac->free = initial_buffer_size - mpac->used;
+    mpac->off = COUNTER_SIZE;
+    mpac->parsed = 0;
+    mpac->initial_buffer_size = initial_buffer_size;
+    mpac->z = NULL;
+    mpac->ctx = ctx;
+
+    init_count(mpac->buffer);
+
+    template_init(CTX_CAST(mpac->ctx));
+    CTX_CAST(mpac->ctx)->user.z = &mpac->z;
+    CTX_CAST(mpac->ctx)->user.referenced = false;
+
+    return true;
+}
+
+void msgpack_unpacker_destroy(msgpack_unpacker* mpac)
+{
+    msgpack_zone_free(mpac->z);
+    free(mpac->ctx);
+    decr_count(mpac->buffer);
+}
+
+msgpack_unpacker* msgpack_unpacker_new(size_t initial_buffer_size)
+{
+    msgpack_unpacker* mpac = (msgpack_unpacker*)malloc(sizeof(msgpack_unpacker));
+    if(mpac == NULL) {
+        return NULL;
+    }
+
+    if(!msgpack_unpacker_init(mpac, initial_buffer_size)) {
+        free(mpac);
+        return NULL;
+    }
+
+    return mpac;
+}
+
+void msgpack_unpacker_free(msgpack_unpacker* mpac)
+{
+    msgpack_unpacker_destroy(mpac);
+    free(mpac);
+}
+
+bool msgpack_unpacker_expand_buffer(msgpack_unpacker* mpac, size_t size)
+{
+    if(mpac->used == mpac->off && get_count(mpac->buffer) == 1
+            && !CTX_REFERENCED(mpac)) {
+        // rewind buffer
+        mpac->free += mpac->used - COUNTER_SIZE;
+        mpac->used = COUNTER_SIZE;
+        mpac->off = COUNTER_SIZE;
+
+        if(mpac->free >= size) {
+            return true;
+        }
+    }
+
+    if(mpac->off == COUNTER_SIZE) {
+        char* tmp;
+        size_t next_size = (mpac->used + mpac->free) * 2;  // include COUNTER_SIZE
+        while(next_size < size + mpac->used) {
+            size_t tmp_next_size = next_size * 2;
+            if (tmp_next_size <= next_size) {
+                next_size = size + mpac->used;
+                break;
+            }
+            next_size = tmp_next_size;
+        }
+
+        tmp = (char*)realloc(mpac->buffer, next_size);
+        if(tmp == NULL) {
+            return false;
+        }
+
+        mpac->buffer = tmp;
+        mpac->free = next_size - mpac->used;
+
+    } else {
+        char* tmp;
+        size_t next_size = mpac->initial_buffer_size;  // include COUNTER_SIZE
+        size_t not_parsed = mpac->used - mpac->off;
+        while(next_size < size + not_parsed + COUNTER_SIZE) {
+            size_t tmp_next_size = next_size * 2;
+            if (tmp_next_size <= next_size) {
+                next_size = size + not_parsed + COUNTER_SIZE;
+                break;
+            }
+            next_size = tmp_next_size;
+        }
+
+        tmp = (char*)malloc(next_size);
+        if(tmp == NULL) {
+            return false;
+        }
+
+        init_count(tmp);
+
+        memcpy(tmp+COUNTER_SIZE, mpac->buffer+mpac->off, not_parsed);
+
+        if(CTX_REFERENCED(mpac)) {
+            if(!msgpack_zone_push_finalizer(mpac->z, decr_count, mpac->buffer)) {
+                free(tmp);
+                return false;
+            }
+            CTX_REFERENCED(mpac) = false;
+        } else {
+            decr_count(mpac->buffer);
+        }
+
+        mpac->buffer = tmp;
+        mpac->used = not_parsed + COUNTER_SIZE;
+        mpac->free = next_size - mpac->used;
+        mpac->off = COUNTER_SIZE;
+    }
+
+    return true;
+}
+
+int msgpack_unpacker_execute(msgpack_unpacker* mpac)
+{
+    size_t off = mpac->off;
+    int ret = template_execute(CTX_CAST(mpac->ctx),
+            mpac->buffer, mpac->used, &mpac->off);
+    if(mpac->off > off) {
+        mpac->parsed += mpac->off - off;
+    }
+    return ret;
+}
+
+msgpack_object msgpack_unpacker_data(msgpack_unpacker* mpac)
+{
+    return template_data(CTX_CAST(mpac->ctx));
+}
+
+msgpack_zone* msgpack_unpacker_release_zone(msgpack_unpacker* mpac)
+{
+    msgpack_zone* old = mpac->z;
+
+    if (old == NULL) return NULL;
+    if(!msgpack_unpacker_flush_zone(mpac)) {
+        return NULL;
+    }
+
+    mpac->z = NULL;
+    CTX_CAST(mpac->ctx)->user.z = &mpac->z;
+
+    return old;
+}
+
+void msgpack_unpacker_reset_zone(msgpack_unpacker* mpac)
+{
+    msgpack_zone_clear(mpac->z);
+}
+
+bool msgpack_unpacker_flush_zone(msgpack_unpacker* mpac)
+{
+    if(CTX_REFERENCED(mpac)) {
+        if(!msgpack_zone_push_finalizer(mpac->z, decr_count, mpac->buffer)) {
+            return false;
+        }
+        CTX_REFERENCED(mpac) = false;
+
+        incr_count(mpac->buffer);
+    }
+
+    return true;
+}
+
+void msgpack_unpacker_reset(msgpack_unpacker* mpac)
+{
+    template_init(CTX_CAST(mpac->ctx));
+    // don't reset referenced flag
+    mpac->parsed = 0;
+}
+
+static inline msgpack_unpack_return unpacker_next(msgpack_unpacker* mpac,
+                                                  msgpack_unpacked* result)
+{
+    int ret;
+
+    msgpack_unpacked_destroy(result);
+
+    ret = msgpack_unpacker_execute(mpac);
+
+    if(ret < 0) {
+        result->zone = NULL;
+        memset(&result->data, 0, sizeof(msgpack_object));
+        return (msgpack_unpack_return)ret;
+    }
+
+    if(ret == 0) {
+        return MSGPACK_UNPACK_CONTINUE;
+    }
+    result->zone = msgpack_unpacker_release_zone(mpac);
+    result->data = msgpack_unpacker_data(mpac);
+
+    return MSGPACK_UNPACK_SUCCESS;
+}
+
+msgpack_unpack_return msgpack_unpacker_next(msgpack_unpacker* mpac,
+                                            msgpack_unpacked* result)
+{
+    msgpack_unpack_return ret;
+
+    ret = unpacker_next(mpac, result);
+    if (ret == MSGPACK_UNPACK_SUCCESS) {
+        msgpack_unpacker_reset(mpac);
+    }
+
+    return ret;
+}
+
+msgpack_unpack_return
+msgpack_unpacker_next_with_size(msgpack_unpacker* mpac,
+                                msgpack_unpacked* result, size_t *p_bytes)
+{
+    msgpack_unpack_return ret;
+
+    ret = unpacker_next(mpac, result);
+    if (ret == MSGPACK_UNPACK_SUCCESS || ret == MSGPACK_UNPACK_CONTINUE) {
+        *p_bytes = mpac->parsed;
+    }
+
+    if (ret == MSGPACK_UNPACK_SUCCESS) {
+        msgpack_unpacker_reset(mpac);
+    }
+
+    return ret;
+}
+
+msgpack_unpack_return
+msgpack_unpack(const char* data, size_t len, size_t* off,
+        msgpack_zone* result_zone, msgpack_object* result)
+{
+    size_t noff = 0;
+    if(off != NULL) { noff = *off; }
+
+    if(len <= noff) {
+        // FIXME
+        return MSGPACK_UNPACK_CONTINUE;
+    }
+    else {
+        int e;
+        template_context ctx;
+        template_init(&ctx);
+
+        ctx.user.z = &result_zone;
+        ctx.user.referenced = false;
+
+        e = template_execute(&ctx, data, len, &noff);
+        if(e < 0) {
+            return (msgpack_unpack_return)e;
+        }
+
+        if(off != NULL) { *off = noff; }
+
+        if(e == 0) {
+            return MSGPACK_UNPACK_CONTINUE;
+        }
+
+        *result = template_data(&ctx);
+
+        if(noff < len) {
+            return MSGPACK_UNPACK_EXTRA_BYTES;
+        }
+
+        return MSGPACK_UNPACK_SUCCESS;
+    }
+}
+
+msgpack_unpack_return
+msgpack_unpack_next(msgpack_unpacked* result,
+        const char* data, size_t len, size_t* off)
+{
+    size_t noff = 0;
+    msgpack_unpacked_destroy(result);
+
+    if(off != NULL) { noff = *off; }
+
+    if(len <= noff) {
+        return MSGPACK_UNPACK_CONTINUE;
+    }
+
+    {
+        int e;
+        template_context ctx;
+        template_init(&ctx);
+
+        ctx.user.z = &result->zone;
+        ctx.user.referenced = false;
+
+        e = template_execute(&ctx, data, len, &noff);
+
+        if(off != NULL) { *off = noff; }
+
+        if(e < 0) {
+            msgpack_zone_free(result->zone);
+            result->zone = NULL;
+            return (msgpack_unpack_return)e;
+        }
+
+        if(e == 0) {
+            return MSGPACK_UNPACK_CONTINUE;
+        }
+
+        result->data = template_data(&ctx);
+
+        return MSGPACK_UNPACK_SUCCESS;
+    }
+}
+
+#if defined(MSGPACK_OLD_COMPILER_BUS_ERROR_WORKAROUND)
+// FIXME: Dirty hack to avoid a bus error caused by OS X's old gcc.
+static void dummy_function_to_avoid_bus_error()
+{
+}
+#endif