qapi/string-output-visitor.c

   1 /*
   2  * String printing Visitor
   3  *
   4  * Copyright Red Hat, Inc. 2012
   5  *
   6  * Author: Paolo Bonzini <pbonzini@redhat.com>
   7  *
   8  * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
   9  * See the COPYING.LIB file in the top-level directory.
  10  *
  11  */
  12
  13 #include "qemu-common.h"
  14 #include "qapi/string-output-visitor.h"
  15 #include "qapi/visitor-impl.h"
  16 #include "qapi/qmp/qerror.h"
  17
  18 struct StringOutputVisitor
  19 {
  20     Visitor visitor;
  21     char *string;
  22 };
  23
  24 static void string_output_set(StringOutputVisitor *sov, char *string)
  25 {
  26     g_free(sov->string);
  27     sov->string = string;
  28 }
  29
  30 static void print_type_int(Visitor *v, int64_t *obj, const char *name,
  31                            Error **errp)
  32 {
  33     StringOutputVisitor *sov = DO_UPCAST(StringOutputVisitor, visitor, v);
  34     string_output_set(sov, g_strdup_printf("%lld", (long long) *obj));
  35 }
  36
  37 static void print_type_bool(Visitor *v, bool *obj, const char *name,
  38                             Error **errp)
  39 {
  40     StringOutputVisitor *sov = DO_UPCAST(StringOutputVisitor, visitor, v);
  41     string_output_set(sov, g_strdup(*obj ? "true" : "false"));
  42 }
  43
  44 static void print_type_str(Visitor *v, char **obj, const char *name,
  45                            Error **errp)
  46 {
  47     StringOutputVisitor *sov = DO_UPCAST(StringOutputVisitor, visitor, v);
  48     string_output_set(sov, g_strdup(*obj ? *obj : ""));
  49 }
  50
  51 static void print_type_number(Visitor *v, double *obj, const char *name,
  52                               Error **errp)
  53 {
  54     StringOutputVisitor *sov = DO_UPCAST(StringOutputVisitor, visitor, v);
  55     string_output_set(sov, g_strdup_printf("%f", *obj));
  56 }
  57
  58 char *string_output_get_string(StringOutputVisitor *sov)
  59 {
  60     char *string = sov->string;
  61     sov->string = NULL;
  62     return string;
  63 }
  64
  65 Visitor *string_output_get_visitor(StringOutputVisitor *sov)
  66 {
  67     return &sov->visitor;
  68 }
  69
  70 void string_output_visitor_cleanup(StringOutputVisitor *sov)
  71 {
  72     g_free(sov->string);
  73     g_free(sov);
  74 }
  75
  76 StringOutputVisitor *string_output_visitor_new(void)
  77 {
  78     StringOutputVisitor *v;
  79
  80     v = g_malloc0(sizeof(*v));
  81
  82     v->visitor.type_enum = output_type_enum;
  83     v->visitor.type_int = print_type_int;
  84     v->visitor.type_bool = print_type_bool;
  85     v->visitor.type_str = print_type_str;
  86     v->visitor.type_number = print_type_number;
  87
  88     return v;
  89 }