X-Git-Url: https://git.draconx.ca/gitweb/upkg.git/blobdiff_plain/aa72d53735c595550e417882b9aa8d1473b9b57c..d42bc5c2d8dcf388b424c5bbc4b6f25416f689f1:/src/uobject/uobject.c diff --git a/src/uobject/uobject.c b/src/uobject/uobject.c index 4778292..331b8ae 100644 --- a/src/uobject/uobject.c +++ b/src/uobject/uobject.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include #include @@ -27,6 +28,7 @@ #include #include +#include #include "upkg.h" #include "pack.h" @@ -189,6 +191,93 @@ decode_prop_header(struct upkg *upkg, struct prop_head *head, return len; } +/* + * TODO: Make this use the uobject_module stuff so packages are not loaded + * more than once. + */ +static GTypeModule * +open_import_package(UObject *uo, const struct upkg_import *i) +{ + GTypeModule *pkg; + + assert(i->parent == NULL); + + if (strcmp(i->class_package, "Core") != 0 + || strcmp(i->class_name, "Package") != 0) { + u_err(uo, "import root must be Core.Package"); + return NULL; + } + + pkg = u_pkg_open(i->name); + if (!pkg || !g_type_module_use(pkg)) { + u_err(uo, "failed to open package: %s", i->name); + return NULL; + } + + if (!U_PKG(pkg)->pkg) { + g_type_module_unuse(pkg); + u_err(uo, "failed to open package: %s", pkg->name); + return NULL; + } + + return pkg; +} + +/* Find the export index of a package based on the import chain from another + * package. Returns the (non-negative) offset on success, or a negative value + * on failure. */ +static long resolve_import(struct upkg *pkg, const struct upkg_import *import) +{ + long current, index; + + if (!import->parent) + return -1; + + current = resolve_import(pkg, import->parent); + if (current != -1 && current >= 0) + return -42; + + index = upkg_export_find(pkg, current, import->name); + if (index < 0) + return -42; + + return index; +} + +static GObject *get_import_object(UObject *uo, unsigned long index) +{ + const struct upkg_import *import; + GObject *obj = NULL; + GTypeModule *pkg; + long obj_index; + + import = upkg_get_import(uo->pkg_file->pkg, index); + if (!import) { + u_err(uo, "invalid package import: %ld", index); + return NULL; + } + + /* Get the package name at the top of the hierarchy. */ + for (const struct upkg_import *i = import; i; i = i->parent) { + if (i->parent == NULL) { + pkg = open_import_package(uo, i); + if (!pkg) + return NULL; + } + } + + obj_index = resolve_import(U_PKG(pkg)->pkg, import); + if (obj_index < 0) { + u_err(uo, "could not find import in package: %s", pkg->name); + goto out; + } + + obj = u_object_new_from_package(pkg, obj_index); +out: + g_type_module_unuse(pkg); + return obj; +} + static int decode_object_property(UObject *uo, GValue *val, unsigned long len) { struct u_object_priv *priv = U_OBJECT_GET_PRIV(uo); @@ -201,7 +290,7 @@ static int decode_object_property(UObject *uo, GValue *val, unsigned long len) return -1; if (index < 0) { - fprintf(stderr, "Imports not supported yet.\n"); + obj = get_import_object(uo, -(index+1)); } else { obj = u_object_new_from_package(uo->pkg, index-1); } @@ -211,13 +300,48 @@ static int decode_object_property(UObject *uo, GValue *val, unsigned long len) return 0; } +/* + * Deserialize an IEEE 754 binary32 value in "little endian" (for whatever + * that term is worth in this context). That is, when interpreted as a little + * endian 32-bit unsigned integer: bit 31 is the sign, bits 30-23 are the + * (biased) exponent, and bits 22-0 are the encoded part of the significand. + * + * The implementation is designed to be agnostic of the platform's actual + * float type, but the conversion may be lossy if "float" is not itself a + * binary32 format. NaN payloads are not preserved. + */ +static float unpack_binary32_le(const unsigned char *buf) +{ + unsigned long raw; + long significand; + int exponent; + float result; + + raw = unpack_32_le(buf); + exponent = (raw & 0x7f800000) >> 23; + significand = (raw & 0x007fffff) >> 0; + + switch (exponent) { + case 255: + result = significand ? NAN : INFINITY; + break; + default: + significand |= 0x00800000; + /* fall through */ + case 0: + result = ldexpf(significand, exponent-126-24); + } + + return copysignf(result, raw & 0x80000000 ? -1 : 1); +} + static unsigned long deserialize_property(UObject *uo, struct prop_head *head) { struct u_object_priv *priv = U_OBJECT_GET_PRIV(uo); unsigned long rc, len = 0; GValue val = {0}; - rc = decode_prop_header(uo->pkg, head, priv->buf, priv->nbuf); + rc = decode_prop_header(uo->pkg_file->pkg, head, priv->buf, priv->nbuf); if (rc == 0) return 0; len += rc; @@ -226,20 +350,22 @@ static unsigned long deserialize_property(UObject *uo, struct prop_head *head) case PROPERTY_END: break; case PROPERTY_BYTE: - if (priv->nbuf-len < 1) + if (head->size != 1 || priv->nbuf-len < head->size) return 0; g_value_init(&val, G_TYPE_UCHAR); g_value_set_uchar(&val, priv->buf[len]); g_object_set_property(G_OBJECT(uo), head->prop_name, &val); break; case PROPERTY_INTEGER: - if (priv->nbuf-len < 4) + if (head->size != 4 || priv->nbuf-len < head->size) return 0; g_value_init(&val, G_TYPE_ULONG); g_value_set_ulong(&val, unpack_32_le(priv->buf+len)); g_object_set_property(G_OBJECT(uo), head->prop_name, &val); break; case PROPERTY_BOOLEAN: + if (head->size != 0) + return 0; g_value_init(&val, G_TYPE_BOOLEAN); g_value_set_boolean(&val, head->tag_msb); g_object_set_property(G_OBJECT(uo), head->prop_name, &val); @@ -250,9 +376,16 @@ static unsigned long deserialize_property(UObject *uo, struct prop_head *head) return 0; g_object_set_property(G_OBJECT(uo), head->prop_name, &val); break; + case PROPERTY_FLOAT: + if (head->size != 4 || priv->nbuf-len < head->size) + return 0; + g_value_init(&val, G_TYPE_FLOAT); + g_value_set_float(&val, unpack_binary32_le(priv->buf+len)); + g_object_set_property(G_OBJECT(uo), head->prop_name, &val); + break; default: - fprintf(stderr, "Unhandled property type %x\n", - (unsigned)head->type); + u_warn(uo, "%s: unsupported property type %u", + head->prop_name, (unsigned)head->type); } len += head->size; @@ -313,17 +446,17 @@ static int deserialize(UObject *uo) /* * Get the full hierarchical object name for an export, used for diagnostics. - * Currently, this does not include the package name (which is actually - * required for this to be a "full" name) as it's not yet passed to the - * deserialize method. + * The package name is passed in pname. * * Returns a buffer allocated by malloc on success, or NULL on failure. */ -static char *get_obj_fullname(const struct upkg_export *e) +static char *get_obj_fullname(const char *pname, const struct upkg_export *e) { - size_t total_len = 0, len; + size_t total_len = strlen(pname) + 1, len; char *fullname; + assert(e != NULL); + for (const struct upkg_export *c = e; c; c = c->parent) { len = strlen(c->name) + 1; if (total_len > SIZE_MAX - len) @@ -344,30 +477,37 @@ static char *get_obj_fullname(const struct upkg_export *e) fullname[total_len + len] = c == e ? '\0' : '.'; } + assert(total_len == strlen(pname)+1); + memcpy(fullname, pname, total_len-1); + fullname[total_len-1] = '.'; + return fullname; } -int u_object_deserialize(GObject *obj, struct upkg *pkg, unsigned long idx) +int u_object_deserialize(GObject *obj, GTypeModule *pkg, unsigned long idx) { g_return_val_if_fail(IS_U_OBJECT(obj), -1); + g_return_val_if_fail(IS_U_PKG(pkg), -1); + UObject *uo = U_OBJECT(obj); + struct upkg *upkg = U_PKG(pkg)->pkg; const struct upkg_export *e; struct upkg_file *f; int rc; g_return_val_if_fail(uo->pkg_file == NULL, -1); - f = upkg_export_open(pkg, idx); + f = upkg_export_open(upkg, idx); if (!f) { return -1; } - uo->pkg = pkg; + uo->pkg = pkg; uo->pkg_file = f; - e = upkg_get_export(pkg, idx); + e = upkg_get_export(upkg, idx); if (!e) return -1; - uo->pkg_name = get_obj_fullname(e); + uo->pkg_name = get_obj_fullname(pkg->name, e); if (!uo->pkg_name) return -1; @@ -380,19 +520,22 @@ int u_object_deserialize(GObject *obj, struct upkg *pkg, unsigned long idx) return rc; } -GObject *u_object_new_from_package(struct upkg *upkg, unsigned long idx) +GObject *u_object_new_from_package(GTypeModule *pkg, unsigned long idx) { - const struct upkg_export *export; + g_return_val_if_fail(IS_U_PKG(pkg), NULL); + const char *class, *package; GObject *obj = NULL; GType type; - class = upkg_export_class(upkg, idx, &package); + class = upkg_export_class(U_PKG(pkg)->pkg, idx, &package); + if (!class) + return NULL; type = u_object_module_get_class(package, class); if (type) { obj = g_object_new(type, NULL); - if (u_object_deserialize(obj, upkg, idx) != 0) { + if (u_object_deserialize(obj, pkg, idx) != 0) { g_object_unref(obj); return NULL; }