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/**[txh]********************************************************************
Copyright (c) 2004 by Salvador E. Tropea.
Covered by the GPL license.
Module: Variable objects.
Comments:
GDB/MI commands for the "Variable Objects" section.
@<p>
@<pre>
gdb command: Imp? Description:
-var-create Yes create a variable object
-var-delete Yes delete the variable object and its children
-var-set-format Yes set the display format of this variable
-var-show-format Yes show the display format of this variable
-var-info-num-children Yes tells how many children this object has
-var-list-children Yes* return a list of the object's children
-var-info-type Yes show the type of this variable object
-var-info-expression Yes print what this variable object represents
-var-show-attributes Yes is this variable editable?
-var-evaluate-expression Yes get the value of this variable
-var-assign Yes set the value of this variable
-var-update Yes* update the variable and its children
@</pre>
Notes: @<p>
1) I suggest letting gdb to choose the names for the variables.@*
2) -var-list-children supports an optional "show values" argument in MI v2.
It isn't implemented.@*
@<p>
* MI v1 and v2 result formats supported. @<p>
***************************************************************************/
#include "gdbmi.h"
/* Low level versions. */
void mi_var_create(mi_h *h, const char *name, int frame, const char *exp)
{
const char *n=name ? name : "-";
if (frame<0)
mi_send(h,"-var-create %s * %s\n",n,exp);
else
mi_send(h,"-var-create %s %d %s\n",n,frame,exp);
}
void mi_var_delete(mi_h *h, const char *name)
{
mi_send(h,"-var-delete %s\n",name);
}
void mi_var_set_format(mi_h *h, const char *name, const char *format)
{
mi_send(h,"-var-set-format \"%s\" %s\n",name,format);
}
void mi_var_show_format(mi_h *h, const char *name)
{
mi_send(h,"-var-show-format \"%s\"\n",name);
}
void mi_var_info_num_children(mi_h *h, const char *name)
{
mi_send(h,"-var-info-num-children \"%s\"\n",name);
}
void mi_var_info_type(mi_h *h, const char *name)
{
mi_send(h,"-var-info-type \"%s\"\n",name);
}
void mi_var_info_expression(mi_h *h, const char *name)
{
mi_send(h,"-var-info-expression \"%s\"\n",name);
}
void mi_var_show_attributes(mi_h *h, const char *name)
{
mi_send(h,"-var-show-attributes \"%s\"\n",name);
}
void mi_var_update(mi_h *h, const char *name)
{
if (name)
mi_send(h,"-var-update %s\n",name);
else
mi_send(h,"-var-update *\n");
}
void mi_var_assign(mi_h *h, const char *name, const char *expression)
{
mi_send(h,"-var-assign \"%s\" \"%s\"\n",name,expression);
}
void mi_var_evaluate_expression(mi_h *h, const char *name)
{
mi_send(h,"-var-evaluate-expression \"%s\"\n",name);
}
void mi_var_list_children(mi_h *h, const char *name)
{
if (h->version>=MI_VERSION2U(2,0,0))
mi_send(h,"-var-list-children --all-values \"%s\"\n",name);
else
mi_send(h,"-var-list-children \"%s\"\n",name);
}
/* High level versions. */
/**[txh]********************************************************************
Description:
Create a variable object. I recommend using gmi_var_create and letting
gdb choose the names.
Command: -var-create
Return: A new mi_gvar strcture or NULL on error.
***************************************************************************/
mi_gvar *gmi_var_create_nm(mi_h *h, const char *name, int frame, const char *exp)
{
mi_var_create(h,name,frame,exp);
return mi_res_gvar(h,NULL,exp);
}
/**[txh]********************************************************************
Description:
Create a variable object. The name is selected by gdb. Alternative:
gmi_full_var_create.
Command: -var-create [auto name]
Return: A new mi_gvar strcture or NULL on error.
***************************************************************************/
mi_gvar *gmi_var_create(mi_h *h, int frame, const char *exp)
{
return gmi_var_create_nm(h,NULL,frame,exp);
}
/**[txh]********************************************************************
Description:
Delete a variable object. Doesn't free the mi_gvar data.
Command: -var-delete
Return: !=0 OK
***************************************************************************/
int gmi_var_delete(mi_h *h, mi_gvar *var)
{
mi_var_delete(h,var->name);
return mi_res_simple_done(h);
}
/**[txh]********************************************************************
Description:
Set the format used to represent the result.
Command: -var-set-format
Return: !=0 OK
***************************************************************************/
int gmi_var_set_format(mi_h *h, mi_gvar *var, enum mi_gvar_fmt format)
{
int ret;
mi_var_set_format(h,var->name,mi_format_enum_to_str(format));
ret=mi_res_simple_done(h);
if (ret)
var->format=format;
return ret;
}
/**[txh]********************************************************************
Description:
Fill the format field with info from gdb.
Command: -var-show-format
Return: !=0 OK.
***************************************************************************/
int gmi_var_show_format(mi_h *h, mi_gvar *var)
{
mi_var_show_format(h,var->name);
return mi_res_gvar(h,var,NULL)!=NULL;
}
/**[txh]********************************************************************
Description:
Fill the numchild field with info from gdb.
Command: -var-info-num-children
Return: !=0 OK
***************************************************************************/
int gmi_var_info_num_children(mi_h *h, mi_gvar *var)
{
mi_var_info_num_children(h,var->name);
return mi_res_gvar(h,var,NULL)!=NULL;
}
/**[txh]********************************************************************
Description:
Fill the type field with info from gdb.
Command: -var-info-type
Return: !=0 OK
***************************************************************************/
int gmi_var_info_type(mi_h *h, mi_gvar *var)
{
mi_var_info_type(h,var->name);
return mi_res_gvar(h,var,NULL)!=NULL;
}
/**[txh]********************************************************************
Description:
Fill the expression and lang fields with info from gdb. Note that lang
isn't filled during creation.
Command: -var-info-expression
Return: !=0 OK
***************************************************************************/
int gmi_var_info_expression(mi_h *h, mi_gvar *var)
{
mi_var_info_expression(h,var->name);
return mi_res_gvar(h,var,NULL)!=NULL;
}
/**[txh]********************************************************************
Description:
Fill the attr field with info from gdb. Note that attr isn't filled
during creation.
Command: -var-show-attributes
Return: !=0 OK
***************************************************************************/
int gmi_var_show_attributes(mi_h *h, mi_gvar *var)
{
mi_var_show_attributes(h,var->name);
return mi_res_gvar(h,var,NULL)!=NULL;
}
/**[txh]********************************************************************
Description:
Create the variable and also fill the lang and attr fields. The name is
selected by gdb.
Command: -var-create + -var-info-expression + -var-show-attributes
Return: A new mi_gvar strcture or NULL on error.
***************************************************************************/
mi_gvar *gmi_full_var_create(mi_h *h, int frame, const char *exp)
{
mi_gvar *var=gmi_var_create_nm(h,NULL,frame,exp);
if (var)
{/* What if it fails? */
gmi_var_info_expression(h,var);
gmi_var_show_attributes(h,var);
}
return var;
}
/**[txh]********************************************************************
Description:
Update variable. Use NULL for all. Note that *changed can be NULL if none
updated.
Command: -var-update
Return: !=0 OK. The changed list contains the list of changed vars.
***************************************************************************/
int gmi_var_update(mi_h *h, mi_gvar *var, mi_gvar_chg **changed)
{
mi_var_update(h,var ? var->name : NULL);
return mi_res_changelist(h,changed);
}
/**[txh]********************************************************************
Description:
Change variable. The new value replaces the value field.
Command: -var-assign
Return: !=0 OK
***************************************************************************/
int gmi_var_assign(mi_h *h, mi_gvar *var, const char *expression)
{
char *res;
mi_var_assign(h,var->name,expression);
res=mi_res_value(h);
if (res)
{
free(var->value);
var->value=res;
return 1;
}
return 0;
}
/**[txh]********************************************************************
Description:
Fill the value field getting the current value for a variable.
Command: -var-evaluate-expression
Return: !=0 OK, value contains the result.
***************************************************************************/
int gmi_var_evaluate_expression(mi_h *h, mi_gvar *var)
{
char *s;
mi_var_evaluate_expression(h,var->name);
s=mi_res_value(h);
if (s)
{
free(var->value);
var->value=s;
}
return s!=NULL;
}
/**[txh]********************************************************************
Description:
List children. It ONLY returns the first level information. :-(@*
On success the child field contains the list of children.
Command: -var-list-children
Return: !=0 OK
***************************************************************************/
int gmi_var_list_children(mi_h *h, mi_gvar *var)
{
mi_var_list_children(h,var->name);
return mi_res_children(h,var);
}
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