/* * Core Definitions for QAPI Visitor Classes * * Copyright (C) 2012-2016 Red Hat, Inc. * Copyright IBM, Corp. 2011 * * Authors: * Anthony Liguori <aliguori@us.ibm.com> * * This work is licensed under the terms of the GNU LGPL, version 2.1 or later. * See the COPYING.LIB file in the top-level directory. * */ #include "qemu/osdep.h" #include "qapi/error.h" #include "qemu-common.h" #include "qapi/qmp/qobject.h" #include "qapi/qmp/qerror.h" #include "qapi/visitor.h" #include "qapi/visitor-impl.h" #include "trace.h" void visit_complete(Visitor *v, void *opaque) { assert(v->type != VISITOR_OUTPUT || v->complete); trace_visit_complete(v, opaque); if (v->complete) { v->complete(v, opaque); } } void visit_free(Visitor *v) { trace_visit_free(v); if (v) { v->free(v); } } void visit_start_struct(Visitor *v, const char *name, void **obj, size_t size, Error **errp) { Error *err = NULL; trace_visit_start_struct(v, name, obj, size); if (obj) { assert(size); assert(!(v->type & VISITOR_OUTPUT) || *obj); } v->start_struct(v, name, obj, size, &err); if (obj && (v->type & VISITOR_INPUT)) { assert(!err != !*obj); } error_propagate(errp, err); } void visit_check_struct(Visitor *v, Error **errp) { trace_visit_check_struct(v); if (v->check_struct) { v->check_struct(v, errp); } } void visit_end_struct(Visitor *v, void **obj) { trace_visit_end_struct(v, obj); v->end_struct(v, obj); } void visit_start_list(Visitor *v, const char *name, GenericList **list, size_t size, Error **errp) { Error *err = NULL; assert(!list || size >= sizeof(GenericList)); trace_visit_start_list(v, name, list, size); v->start_list(v, name, list, size, &err); if (list && (v->type & VISITOR_INPUT)) { assert(!(err && *list)); } error_propagate(errp, err); } GenericList *visit_next_list(Visitor *v, GenericList *tail, size_t size) { assert(tail && size >= sizeof(GenericList)); trace_visit_next_list(v, tail, size); return v->next_list(v, tail, size); } void visit_end_list(Visitor *v, void **obj) { trace_visit_end_list(v, obj); v->end_list(v, obj); } void visit_start_alternate(Visitor *v, const char *name, GenericAlternate **obj, size_t size, bool promote_int, Error **errp) { Error *err = NULL; assert(obj && size >= sizeof(GenericAlternate)); assert(!(v->type & VISITOR_OUTPUT) || *obj); trace_visit_start_alternate(v, name, obj, size, promote_int); if (v->start_alternate) { v->start_alternate(v, name, obj, size, promote_int, &err); } if (v->type & VISITOR_INPUT) { assert(v->start_alternate && !err != !*obj); } error_propagate(errp, err); } void visit_end_alternate(Visitor *v, void **obj) { trace_visit_end_alternate(v, obj); if (v->end_alternate) { v->end_alternate(v, obj); } } bool visit_optional(Visitor *v, const char *name, bool *present) { trace_visit_optional(v, name, present); if (v->optional) { v->optional(v, name, present); } return *present; } bool visit_is_input(Visitor *v) { return v->type == VISITOR_INPUT; } void visit_type_int(Visitor *v, const char *name, int64_t *obj, Error **errp) { assert(obj); trace_visit_type_int(v, name, obj); v->type_int64(v, name, obj, errp); } static void visit_type_uintN(Visitor *v, uint64_t *obj, const char *name, uint64_t max, const char *type, Error **errp) { Error *err = NULL; uint64_t value = *obj; v->type_uint64(v, name, &value, &err); if (err) { error_propagate(errp, err); } else if (value > max) { error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name ? name : "null", type); } else { *obj = value; } } void visit_type_uint8(Visitor *v, const char *name, uint8_t *obj, Error **errp) { uint64_t value; trace_visit_type_uint8(v, name, obj); value = *obj; visit_type_uintN(v, &value, name, UINT8_MAX, "uint8_t", errp); *obj = value; } void visit_type_uint16(Visitor *v, const char *name, uint16_t *obj, Error **errp) { uint64_t value; trace_visit_type_uint16(v, name, obj); value = *obj; visit_type_uintN(v, &value, name, UINT16_MAX, "uint16_t", errp); *obj = value; } void visit_type_uint32(Visitor *v, const char *name, uint32_t *obj, Error **errp) { uint64_t value; trace_visit_type_uint32(v, name, obj); value = *obj; visit_type_uintN(v, &value, name, UINT32_MAX, "uint32_t", errp); *obj = value; } void visit_type_uint64(Visitor *v, const char *name, uint64_t *obj, Error **errp) { assert(obj); trace_visit_type_uint64(v, name, obj); v->type_uint64(v, name, obj, errp); } static void visit_type_intN(Visitor *v, int64_t *obj, const char *name, int64_t min, int64_t max, const char *type, Error **errp) { Error *err = NULL; int64_t value = *obj; v->type_int64(v, name, &value, &err); if (err) { error_propagate(errp, err); } else if (value < min || value > max) { error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name ? name : "null", type); } else { *obj = value; } } void visit_type_int8(Visitor *v, const char *name, int8_t *obj, Error **errp) { int64_t value; trace_visit_type_int8(v, name, obj); value = *obj; visit_type_intN(v, &value, name, INT8_MIN, INT8_MAX, "int8_t", errp); *obj = value; } void visit_type_int16(Visitor *v, const char *name, int16_t *obj, Error **errp) { int64_t value; trace_visit_type_int16(v, name, obj); value = *obj; visit_type_intN(v, &value, name, INT16_MIN, INT16_MAX, "int16_t", errp); *obj = value; } void visit_type_int32(Visitor *v, const char *name, int32_t *obj, Error **errp) { int64_t value; trace_visit_type_int32(v, name, obj); value = *obj; visit_type_intN(v, &value, name, INT32_MIN, INT32_MAX, "int32_t", errp); *obj = value; } void visit_type_int64(Visitor *v, const char *name, int64_t *obj, Error **errp) { assert(obj); trace_visit_type_int64(v, name, obj); v->type_int64(v, name, obj, errp); } void visit_type_size(Visitor *v, const char *name, uint64_t *obj, Error **errp) { assert(obj); trace_visit_type_size(v, name, obj); if (v->type_size) { v->type_size(v, name, obj, errp); } else { v->type_uint64(v, name, obj, errp); } } void visit_type_bool(Visitor *v, const char *name, bool *obj, Error **errp) { assert(obj); trace_visit_type_bool(v, name, obj); v->type_bool(v, name, obj, errp); } void visit_type_str(Visitor *v, const char *name, char **obj, Error **errp) { Error *err = NULL; assert(obj); /* TODO: Fix callers to not pass NULL when they mean "", so that we * can enable: assert(!(v->type & VISITOR_OUTPUT) || *obj); */ trace_visit_type_str(v, name, obj); v->type_str(v, name, obj, &err); if (v->type & VISITOR_INPUT) { assert(!err != !*obj); } error_propagate(errp, err); } void visit_type_number(Visitor *v, const char *name, double *obj, Error **errp) { assert(obj); trace_visit_type_number(v, name, obj); v->type_number(v, name, obj, errp); } void visit_type_any(Visitor *v, const char *name, QObject **obj, Error **errp) { Error *err = NULL; assert(obj); assert(v->type != VISITOR_OUTPUT || *obj); trace_visit_type_any(v, name, obj); v->type_any(v, name, obj, &err); if (v->type == VISITOR_INPUT) { assert(!err != !*obj); } error_propagate(errp, err); } void visit_type_null(Visitor *v, const char *name, Error **errp) { trace_visit_type_null(v, name); v->type_null(v, name, errp); } static void output_type_enum(Visitor *v, const char *name, int *obj, const char *const strings[], Error **errp) { int i = 0; int value = *obj; char *enum_str; while (strings[i++] != NULL); if (value < 0 || value >= i - 1) { error_setg(errp, QERR_INVALID_PARAMETER, name ? name : "null"); return; } enum_str = (char *)strings[value]; visit_type_str(v, name, &enum_str, errp); } static void input_type_enum(Visitor *v, const char *name, int *obj, const char *const strings[], Error **errp) { Error *local_err = NULL; int64_t value = 0; char *enum_str; visit_type_str(v, name, &enum_str, &local_err); if (local_err) { error_propagate(errp, local_err); return; } while (strings[value] != NULL) { if (strcmp(strings[value], enum_str) == 0) { break; } value++; } if (strings[value] == NULL) { error_setg(errp, QERR_INVALID_PARAMETER, enum_str); g_free(enum_str); return; } g_free(enum_str); *obj = value; } void visit_type_enum(Visitor *v, const char *name, int *obj, const char *const strings[], Error **errp) { assert(obj && strings); switch (v->type) { case VISITOR_INPUT: input_type_enum(v, name, obj, strings, errp); break; case VISITOR_OUTPUT: output_type_enum(v, name, obj, strings, errp); break; case VISITOR_CLONE: /* nothing further to do, scalar value was already copied by * g_memdup() during visit_start_*() */ break; case VISITOR_DEALLOC: /* nothing to deallocate for a scalar */ break; } }