libvirt/src/util/virtypedparam.c

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/*
* virtypedparam.c: utility functions for dealing with virTypedParameters
*
* Copyright (C) 2011-2012 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
*/
#include <config.h>
#include "virtypedparam.h"
#include <stdarg.h>
#include "memory.h"
#include "util.h"
#include "virterror_internal.h"
#define VIR_FROM_THIS VIR_FROM_NONE
VIR_ENUM_DECL(virTypedParameter)
VIR_ENUM_IMPL(virTypedParameter, VIR_TYPED_PARAM_LAST,
"unknown",
"int",
"uint",
"llong",
"ullong",
"double",
"boolean",
"string")
void
virTypedParameterArrayClear(virTypedParameterPtr params, int nparams)
{
int i;
if (!params)
return;
for (i = 0; i < nparams; i++) {
if (params[i].type == VIR_TYPED_PARAM_STRING)
VIR_FREE(params[i].value.s);
}
}
/* Validate that PARAMS contains only recognized parameter names with
* correct types, and with no duplicates. Pass in as many name/type
* pairs as appropriate, and pass NULL to end the list of accepted
* parameters. Return 0 on success, -1 on failure with error message
* already issued. */
int
virTypedParameterArrayValidate(virTypedParameterPtr params, int nparams, ...)
{
va_list ap;
int ret = -1;
int i, j;
const char *name;
int type;
va_start(ap, nparams);
/* Yes, this is quadratic, but since we reject duplicates and
* unknowns, it is constrained by the number of var-args passed
* in, which is expected to be small enough to not be
* noticeable. */
for (i = 0; i < nparams; i++) {
va_end(ap);
va_start(ap, nparams);
name = va_arg(ap, const char *);
while (name) {
type = va_arg(ap, int);
if (STREQ(params[i].field, name)) {
if (params[i].type != type) {
const char *badtype;
badtype = virTypedParameterTypeToString(params[i].type);
if (!badtype)
badtype = virTypedParameterTypeToString(0);
virReportError(VIR_ERR_INVALID_ARG,
_("invalid type '%s' for parameter '%s', "
"expected '%s'"),
badtype, params[i].field,
virTypedParameterTypeToString(type));
}
break;
}
name = va_arg(ap, const char *);
}
if (!name) {
virReportError(VIR_ERR_INVALID_ARG,
_("parameter '%s' not supported"),
params[i].field);
goto cleanup;
}
for (j = 0; j < i; j++) {
if (STREQ(params[i].field, params[j].field)) {
virReportError(VIR_ERR_INVALID_ARG,
_("parameter '%s' occurs multiple times"),
params[i].field);
goto cleanup;
}
}
}
ret = 0;
cleanup:
va_end(ap);
return ret;
}
/* Assign name, type, and the appropriately typed arg to param; in the
* case of a string, the caller is assumed to have malloc'd a string,
* or can pass NULL to have this function malloc an empty string.
* Return 0 on success, -1 after an error message on failure. */
int
virTypedParameterAssign(virTypedParameterPtr param, const char *name,
int type, ...)
{
va_list ap;
int ret = -1;
va_start(ap, type);
if (virStrcpyStatic(param->field, name) == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR, _("Field name '%s' too long"),
name);
goto cleanup;
}
param->type = type;
switch (type)
{
case VIR_TYPED_PARAM_INT:
param->value.i = va_arg(ap, int);
break;
case VIR_TYPED_PARAM_UINT:
param->value.ui = va_arg(ap, unsigned int);
break;
case VIR_TYPED_PARAM_LLONG:
param->value.l = va_arg(ap, long long int);
break;
case VIR_TYPED_PARAM_ULLONG:
param->value.ul = va_arg(ap, unsigned long long int);
break;
case VIR_TYPED_PARAM_DOUBLE:
param->value.d = va_arg(ap, double);
break;
case VIR_TYPED_PARAM_BOOLEAN:
param->value.b = !!va_arg(ap, int);
break;
case VIR_TYPED_PARAM_STRING:
param->value.s = va_arg(ap, char *);
if (!param->value.s)
param->value.s = strdup("");
if (!param->value.s) {
virReportOOMError();
goto cleanup;
}
break;
default:
virReportError(VIR_ERR_INTERNAL_ERROR,
_("unexpected type %d for field %s"), type, name);
goto cleanup;
}
ret = 0;
cleanup:
va_end(ap);
return ret;
}
/* Assign name, type, and convert the argument from a const string.
* In case of a string, the string is copied.
* Return 0 on success, -1 after an error message on failure. */
int
virTypedParameterAssignFromStr(virTypedParameterPtr param, const char *name,
int type, const char *val)
{
int ret = -1;
if (!val) {
virReportError(VIR_ERR_INVALID_ARG, _("NULL value for field '%s'"),
name);
goto cleanup;
}
if (virStrcpyStatic(param->field, name) == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR, _("Field name '%s' too long"),
name);
goto cleanup;
}
param->type = type;
switch (type) {
case VIR_TYPED_PARAM_INT:
if (virStrToLong_i(val, NULL, 10, &param->value.i) < 0) {
virReportError(VIR_ERR_INVALID_ARG,
_("Invalid value for field '%s': expected int"),
name);
goto cleanup;
}
break;
case VIR_TYPED_PARAM_UINT:
if (virStrToLong_ui(val, NULL, 10, &param->value.ui) < 0) {
virReportError(VIR_ERR_INVALID_ARG,
_("Invalid value for field '%s': "
"expected unsigned int"),
name);
goto cleanup;
}
break;
case VIR_TYPED_PARAM_LLONG:
if (virStrToLong_ll(val, NULL, 10, &param->value.l) < 0) {
virReportError(VIR_ERR_INVALID_ARG,
_("Invalid value for field '%s': "
"expected long long"),
name);
goto cleanup;
}
break;
case VIR_TYPED_PARAM_ULLONG:
if (virStrToLong_ull(val, NULL, 10, &param->value.ul) < 0) {
virReportError(VIR_ERR_INVALID_ARG,
_("Invalid value for field '%s': "
"expected unsigned long long"),
name);
goto cleanup;
}
break;
case VIR_TYPED_PARAM_DOUBLE:
if (virStrToDouble(val, NULL, &param->value.d) < 0) {
virReportError(VIR_ERR_INVALID_ARG,
_("Invalid value for field '%s': "
"expected double"),
name);
goto cleanup;
}
break;
case VIR_TYPED_PARAM_BOOLEAN:
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if (STRCASEEQ(val, "true") || STREQ(val, "1")) {
param->value.b = true;
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} else if (STRCASEEQ(val, "false") || STREQ(val, "0")) {
param->value.b = false;
} else {
virReportError(VIR_ERR_INVALID_ARG,
_("Invalid boolean value for field '%s'"), name);
goto cleanup;
}
break;
case VIR_TYPED_PARAM_STRING:
if (!(param->value.s = strdup(val))) {
virReportOOMError();
goto cleanup;
}
break;
default:
virReportError(VIR_ERR_INTERNAL_ERROR,
_("unexpected type %d for field %s"), type, name);
goto cleanup;
}
ret = 0;
cleanup:
return ret;
}