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util: Drop virsexpr module 

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Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Peter Krempa 2019-07-03 10:02:33 +02:00
parent 2f1c909991
commit c7a8ccc040
5 changed files with 0 additions and 695 deletions
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1
po/POTFILES
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@ -256,7 +256,6 @@ src/util/virscsi.c
src/util/virscsihost.c
src/util/virscsivhost.c
src/util/virsecret.c
src/util/virsexpr.c
src/util/virsocketaddr.c
src/util/virstorageencryption.c
src/util/virstoragefile.c

18
src/libvirt_private.syms
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@ -2878,24 +2878,6 @@ virSecretLookupFormatSecret;
virSecretLookupParseSecret;
# util/virsexpr.h
sexpr2string;
sexpr_append;
sexpr_cons;
sexpr_float;
sexpr_fmt_node;
sexpr_free;
sexpr_has;
sexpr_int;
sexpr_lookup;
sexpr_nil;
sexpr_node;
sexpr_node_copy;
sexpr_string;
sexpr_u64;
string2sexpr;
# util/virsocketaddr.h
virSocketAddrBroadcast;
virSocketAddrBroadcastByPrefix;

2
src/util/Makefile.inc.am
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@ -179,8 +179,6 @@ UTIL_SOURCES = \
util/virseclabel.h \
util/virsecret.c \
util/virsecret.h \
util/virsexpr.c \
util/virsexpr.h \
util/virsocketaddr.c \
util/virsocketaddr.h \
util/virstorageencryption.c \

608
src/util/virsexpr.c
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@ -1,608 +0,0 @@
/*
* virsexpr.c : S-Expression routines to communicate with the Xen Daemon
*
* Copyright (C) 2010-2011 Red Hat, Inc.
* Copyright (C) 2005 Anthony Liguori <aliguori@us.ibm.com>
*
* 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 "c-ctype.h"
#include "virerror.h"
#include "virsexpr.h"
#include "viralloc.h"
#include "virstring.h"
#define VIR_FROM_THIS VIR_FROM_SEXPR
/**
* sexpr_new:
*
* Create a new S-Expression
*
* Returns the new node or NULL in case of memory allocation error
*/
static struct sexpr *
sexpr_new(void)
{
struct sexpr *ret;
if (VIR_ALLOC(ret) < 0)
return NULL;
ret->kind = SEXPR_NIL;
return ret;
}
/**
* sexpr_free:
* @sexpr: the S-Expression pointer
*
* Free an S-Expression
*/
void
sexpr_free(struct sexpr *sexpr)
{
int serrno = errno;
if (sexpr == NULL)
return;
switch (sexpr->kind) {
case SEXPR_CONS:
sexpr_free(sexpr->u.s.car);
sexpr_free(sexpr->u.s.cdr);
break;
case SEXPR_VALUE:
VIR_FREE(sexpr->u.value);
break;
case SEXPR_NIL:
break;
}
VIR_FREE(sexpr);
errno = serrno;
}
/**
* sexpr_nil:
*
* Provide a NIL S-Expression (the pointer is not shared so NIL equality
* testing won't work at the pointer level).
*
* Returns a new NIL S-Expression of NULL in case of error.
*/
struct sexpr *
sexpr_nil(void)
{
return sexpr_new();
}
/**
* sexpr_string:
* @str: the input string, assumed to be UTF-8
* @len: the length in bytes of the input
*
* Parse the input S-Expression and return a pointer to the result
*
* Returns the S-Expression pointer or NULL in case of error
*/
struct sexpr *
sexpr_string(const char *str, ssize_t len)
{
struct sexpr *ret = sexpr_new();
if (ret == NULL)
return ret;
ret->kind = SEXPR_VALUE;
if (VIR_STRNDUP(ret->u.value, str, len) < 0)
VIR_FREE(ret);
return ret;
}
/**
* sexpr_cons:
* @car: the left operand
* @cdr: the right operand
*
* Implement the CONS operation assembling 2 existing S-Expressions.
* Note that in case of error the input data are not freed.
*
* Returns the resulting S-Expression pointer or NULL in case of error.
*/
struct sexpr *
sexpr_cons(const struct sexpr *car, const struct sexpr *cdr)
{
struct sexpr *ret = sexpr_new();
if (ret == NULL)
return ret;
ret->kind = SEXPR_CONS;
ret->u.s.car = (struct sexpr *) car;
ret->u.s.cdr = (struct sexpr *) cdr;
return ret;
}
/**
* append:
* @lst: an existing list
* @value: the value
*
* Internal operation appending a value at the end of an existing list
*/
static int
append(struct sexpr *lst, const struct sexpr *value)
{
struct sexpr *nil = sexpr_nil();
if (nil == NULL)
return -1;
while (lst->kind != SEXPR_NIL)
lst = lst->u.s.cdr;
lst->kind = SEXPR_CONS;
lst->u.s.car = (struct sexpr *) value;
lst->u.s.cdr = nil;
return 0;
}
/**
* @lst: an existing list
* @value: the value
*
* Append a value at the end of an existing list
*
* Returns lst or NULL in case of error
*/
struct sexpr *
sexpr_append(struct sexpr *lst, const struct sexpr *value)
{
if (lst == NULL)
return NULL;
if (value == NULL)
return lst;
if (append(lst, value) < 0)
return NULL;
return lst;
}
/**
* sexpr2string:
* @sexpr: an S-Expression pointer
* @buffer: the output buffer
*
* Serialize the S-Expression in the buffer.
*
* Returns 0 on success, -1 on error.
*/
int
sexpr2string(const struct sexpr *sexpr, virBufferPtr buffer)
{
if ((sexpr == NULL) || (buffer == NULL))
return -1;
switch (sexpr->kind) {
case SEXPR_CONS:
virBufferAddChar(buffer, '(');
if (sexpr2string(sexpr->u.s.car, buffer) < 0)
return -1;
while (sexpr->u.s.cdr->kind != SEXPR_NIL) {
sexpr = sexpr->u.s.cdr;
virBufferAddChar(buffer, ' ');
if (sexpr2string(sexpr->u.s.car, buffer) < 0)
return -1;
}
virBufferAddChar(buffer, ')');
break;
case SEXPR_VALUE:
if (strchr(sexpr->u.value, ' ') ||
strchr(sexpr->u.value, ')') ||
strchr(sexpr->u.value, '('))
virBufferAsprintf(buffer, "'%s'", sexpr->u.value);
else
virBufferAdd(buffer, sexpr->u.value, -1);
break;
case SEXPR_NIL:
virBufferAddLit(buffer, "()");
break;
default:
virReportError(VIR_ERR_SEXPR_SERIAL,
_("unknown s-expression kind %d"), sexpr->kind);
return -1;
}
return 0;
}
#define IS_SPACE(c) ((c == 0x20) || (c == 0x9) || (c == 0xD) || (c == 0xA))
static const char *
trim(const char *string)
{
while (IS_SPACE(*string))
string++;
return string;
}
/**
* _string2sexpr:
* @buffer: a zero terminated buffer containing an S-Expression in UTF-8
* @end: pointer to an index in the buffer for the already parsed bytes
*
* Internal routine implementing the parse of S-Expression
* Note that failure in this function is catastrophic. If it returns
* NULL, you've leaked memory and you're currently OOM. It will always
* parse an SEXPR given a buffer
*
* Returns a pointer to the resulting parsed S-Expression, or NULL in case of
* hard error.
*/
static struct sexpr *
_string2sexpr(const char *buffer, size_t * end)
{
const char *ptr = buffer + *end;
struct sexpr *ret = sexpr_new();
if (ret == NULL)
return NULL;
ptr = trim(ptr);
if (ptr[0] == '(') {
ret->kind = SEXPR_NIL;
ptr = trim(ptr + 1);
while (*ptr && *ptr != ')') {
struct sexpr *tmp;
size_t tmp_len = 0;
tmp = _string2sexpr(ptr, &tmp_len);
if (tmp == NULL)
goto error;
if (append(ret, tmp) < 0) {
sexpr_free(tmp);
goto error;
}
ptr = trim(ptr + tmp_len);
}
if (*ptr == ')')
ptr++;
} else {
const char *start;
if (*ptr == '\'') {
ptr++;
start = ptr;
while (*ptr && *ptr != '\'') {
if (*ptr == '\\' && ptr[1])
ptr++;
ptr++;
}
if (VIR_STRNDUP(ret->u.value, start, ptr - start) < 0)
goto error;
if (*ptr == '\'')
ptr++;
} else {
start = ptr;
while (*ptr && !c_isspace(*ptr)
&& *ptr != ')' && *ptr != '(') {
ptr++;
}
if (VIR_STRNDUP(ret->u.value, start, ptr - start) < 0)
goto error;
}
ret->kind = SEXPR_VALUE;
if (ret->u.value == NULL)
goto error;
}
*end = ptr - buffer;
return ret;
error:
sexpr_free(ret);
return NULL;
}
/**
* string2sexpr:
* @buffer: a zero terminated buffer containing an S-Expression in UTF-8
*
* Parse the S-Expression in the buffer.
* Note that failure in this function is catastrophic. If it returns
* NULL, you've leaked memory and you're currently OOM. It will always
* parse an SEXPR given a buffer
*
* Returns a pointer to the resulting parsed S-Expression, or NULL in case of
* hard error.
*/
struct sexpr *
string2sexpr(const char *buffer)
{
size_t dummy = 0;
return _string2sexpr(buffer, &dummy);
}
/**
* sexpr_lookup_key:
* @sexpr: a pointer to a parsed S-Expression
* @node: a path for the sub expression to lookup in the S-Expression
*
* Search a sub expression in the S-Expression based on its path
* Returns the key node, rather than the data node.
* NOTE: path are limited to 4096 bytes.
*
* Returns the pointer to the sub expression or NULL if not found.
*/
static struct sexpr *
sexpr_lookup_key(const struct sexpr *sexpr, const char *node)
{
struct sexpr *result = NULL;
char *buffer, *ptr, *token;
if ((node == NULL) || (sexpr == NULL))
return NULL;
if (VIR_STRDUP(buffer, node) < 0)
return NULL;
ptr = buffer;
token = strsep(&ptr, "/");
if (sexpr->kind != SEXPR_CONS || sexpr->u.s.car->kind != SEXPR_VALUE)
goto cleanup;
if (STRNEQ(sexpr->u.s.car->u.value, token))
goto cleanup;
for (token = strsep(&ptr, "/"); token; token = strsep(&ptr, "/")) {
const struct sexpr *i;
sexpr = sexpr->u.s.cdr;
for (i = sexpr; i->kind != SEXPR_NIL; i = i->u.s.cdr) {
if (i->kind != SEXPR_CONS ||
i->u.s.car->kind != SEXPR_CONS ||
i->u.s.car->u.s.car->kind != SEXPR_VALUE) {
continue;
}
if (STREQ(i->u.s.car->u.s.car->u.value, token)) {
sexpr = i->u.s.car;
break;
}
}
if (i->kind == SEXPR_NIL)
break;
}
if (token != NULL)
goto cleanup;
result = (struct sexpr *) sexpr;
cleanup:
VIR_FREE(buffer);
return result;
}
/**
* sexpr_lookup:
* @sexpr: a pointer to a parsed S-Expression
* @node: a path for the sub expression to lookup in the S-Expression
*
* Search a sub expression in the S-Expression based on its path.
* NOTE: path are limited to 4096 bytes.
*
* Returns the pointer to the sub expression or NULL if not found.
*/
struct sexpr *
sexpr_lookup(const struct sexpr *sexpr, const char *node)
{
struct sexpr *s = sexpr_lookup_key(sexpr, node);
if (s == NULL)
return NULL;
if (s->kind != SEXPR_CONS || s->u.s.cdr->kind != SEXPR_CONS)
return NULL;
return s->u.s.cdr;
}
/**
* sexpr_has:
* @sexpr: a pointer to a parsed S-Expression
* @node: a path for the sub expression to lookup in the S-Expression
*
* Search a sub expression in the S-Expression based on its path.
* NOTE: path are limited to 4096 bytes.
* NB, even if the key was found sexpr_lookup may return NULL if
* the corresponding value was empty
*
* Returns true if the key was found, false otherwise
*/
int
sexpr_has(const struct sexpr *sexpr, const char *node)
{
struct sexpr *s = sexpr_lookup_key(sexpr, node);
if (s == NULL)
return 0;
if (s->kind != SEXPR_CONS)
return 0;
return 1;
}
/**
* sexpr_node:
* @sexpr: a pointer to a parsed S-Expression
* @node: a path for the node to lookup in the S-Expression
*
* Search a node value in the S-Expression based on its path
* NOTE: path are limited to 4096 bytes.
*
* Returns the value of the node or NULL if not found.
*/
const char *
sexpr_node(const struct sexpr *sexpr, const char *node)
{
struct sexpr *n = sexpr_lookup(sexpr, node);
return (n && n->u.s.car->kind == SEXPR_VALUE) ? n->u.s.car->u.value : NULL;
}
int sexpr_node_copy(const struct sexpr *sexpr, const char *node, char **dst)
{
const char *val = sexpr_node(sexpr, node);
if (val && *val)
return VIR_STRDUP(*dst, val) < 0 ? -1 : 0;
*dst = NULL;
return 0;
}
/**
* sexpr_fmt_node:
* @sexpr: a pointer to a parsed S-Expression
* @fmt: a path for the node to lookup in the S-Expression
* @... extra data to build the path
*
* Search a node value in the S-Expression based on its path
*
* Returns the value of the node or NULL if not found.
*/
const char *
sexpr_fmt_node(const struct sexpr *sexpr, const char *fmt, ...)
{
int result;
va_list ap;
char *node;
const char *value;
va_start(ap, fmt);
result = virVasprintf(&node, fmt, ap);
va_end(ap);
if (result < 0)
return NULL;
value = sexpr_node(sexpr, node);
VIR_FREE(node);
return value;
}
/**
* sexpr_int:
* @sexpr: an S-Expression
* @name: the name for the value
*
* convenience function to lookup an int value in the S-Expression
*
* Returns the value found or 0 if not found (but may not be an error).
* This function suffers from the flaw that zero is both a correct
* return value and an error indicator: careful!
*/
int
sexpr_int(const struct sexpr *sexpr, const char *name)
{
const char *value = sexpr_node(sexpr, name);
if (value) {
int val = 0;
ignore_value(virStrToLong_i(value, NULL, 0, &val));
return val;
}
return 0;
}
/**
* sexpr_float:
* @sexpr: an S-Expression
* @name: the name for the value
*
* convenience function to lookup a float value in the S-Expression
*
* Returns the value found or 0 if not found (but may not be an error)
*/
double
sexpr_float(const struct sexpr *sexpr, const char *name)
{
const char *value = sexpr_node(sexpr, name);
if (value) {
double val = 0;
ignore_value(virStrToDouble(value, NULL, &val));
return val;
}
return 0;
}
/**
* sexpr_u64:
* @sexpr: an S-Expression
* @name: the name for the value
*
* convenience function to lookup a 64bits unsigned int value in the
* S-Expression
*
* Returns the value found or 0 if not found (but may not be an error)
*/
uint64_t
sexpr_u64(const struct sexpr *sexpr, const char *name)
{
const char *value = sexpr_node(sexpr, name);
if (value) {
unsigned long long val = 0;
ignore_value(virStrToLong_ull(value, NULL, 0, &val));
return val;
}
return 0;
}

66
src/util/virsexpr.h
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@ -1,66 +0,0 @@
/*
* virsexpr.h : S-Expression interfaces needed to communicate with the Xen Daemon
*
* Copyright (C) 2012 Red Hat, Inc.
* Copyright (C) 2005 Anthony Liguori <aliguori@us.ibm.com>
*
* 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/>.
*
*/
#pragma once
#include "internal.h"
#include "virbuffer.h"
enum sexpr_type {
SEXPR_NIL,
SEXPR_CONS,
SEXPR_VALUE,
};
struct sexpr {
enum sexpr_type kind;
union {
struct {
struct sexpr *car;
struct sexpr *cdr;
} s;
char *value;
} u;
};
/* conversion to/from strings */
int sexpr2string(const struct sexpr *sexpr, virBufferPtr buffer);
struct sexpr *string2sexpr(const char *buffer);
/* constructors and destructors */
struct sexpr *sexpr_nil(void);
struct sexpr *sexpr_string(const char *str, ssize_t len);
struct sexpr *sexpr_cons(const struct sexpr *car, const struct sexpr *cdr);
struct sexpr *sexpr_append(struct sexpr *lst, const struct sexpr *item);
void sexpr_free(struct sexpr *sexpr);
/* lookup in S-Expressions */
const char *sexpr_node(const struct sexpr *sexpr, const char *node);
int sexpr_node_copy(const struct sexpr *sexpr, const char *node, char **dst);
const char *sexpr_fmt_node(const struct sexpr *sexpr, const char *fmt, ...)
ATTRIBUTE_FMT_PRINTF(2,3);
struct sexpr *sexpr_lookup(const struct sexpr *sexpr, const char *node);
int sexpr_has(const struct sexpr *sexpr, const char *node);
int sexpr_int(const struct sexpr *sexpr, const char *name);
double sexpr_float(const struct sexpr *sexpr, const char *name);
uint64_t sexpr_u64(const struct sexpr *sexpr, const char *name);