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(formats/xml) Cleanups

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This commit is contained in:
twinaphex 2020-06-28 22:30:53 +02:00
parent b2dbbeb386
commit 47d93f7fb1
1 changed files with 138 additions and 109 deletions
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247
libretro-common/formats/xml/rxml.c
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@ -31,7 +31,8 @@
#define BUFSIZE 4096
struct rxml_parse_buffer {
struct rxml_parse_buffer
{
char xml[BUFSIZE];
char val[BUFSIZE];
rxml_node_t* stack[32];
@ -89,28 +90,28 @@ static void rxml_free_node(struct rxml_node *node)
rxml_document_t *rxml_load_document(const char *path)
{
rxml_document_t *doc;
rxml_document_t *doc = NULL;
char *memory_buffer = NULL;
long len = 0;
int64_t len = 0;
RFILE *file = filestream_open(path,
RETRO_VFS_FILE_ACCESS_READ,
RETRO_VFS_FILE_ACCESS_HINT_NONE);
if (!file)
return NULL;
len = filestream_get_size(file);
memory_buffer = (char*)malloc(len + 1);
len = filestream_get_size(file);
memory_buffer = (char*)malloc(len + 1);
if (!memory_buffer)
goto error;
memory_buffer[len] = '\0';
memory_buffer[len] = '\0';
if (filestream_read(file, memory_buffer, len) != (size_t)len)
goto error;
filestream_close(file);
file = NULL;
file = NULL;
doc = rxml_load_document_string(memory_buffer);
doc = rxml_load_document_string(memory_buffer);
free(memory_buffer);
return doc;
@ -124,139 +125,167 @@ error:
rxml_document_t *rxml_load_document_string(const char *str)
{
yxml_t x;
rxml_document_t *doc = NULL;
struct rxml_parse_buffer *buf = NULL;
size_t stack_i = 0;
size_t level = 0;
int c = 0;
char *valptr = NULL;
yxml_t x;
rxml_node_t *node = NULL;
struct rxml_attrib_node *attr = NULL;
buf = (struct rxml_parse_buffer*)malloc(sizeof(*buf));
struct rxml_parse_buffer *buf = (struct rxml_parse_buffer*)
malloc(sizeof(*buf));
if (!buf)
goto error;
return NULL;
valptr = buf->val;
doc = (rxml_document_t*)calloc(1, sizeof(*doc));
valptr = buf->val;
doc = (rxml_document_t*)malloc(sizeof(*doc));
if (!doc)
goto error;
doc->root_node->name = NULL;
doc->root_node->data = NULL;
doc->root_node->attrib = NULL;
doc->root_node->children = NULL;
doc->root_node->next = NULL;
yxml_init(&x, buf->xml, BUFSIZE);
for (; *str; ++str) {
for (; *str; ++str)
{
yxml_ret_t r = yxml_parse(&x, *str);
if (r < 0)
goto error;
switch (r) {
switch (r)
{
case YXML_ELEMSTART:
if (node) {
if (level > stack_i) {
buf->stack[stack_i] = node;
++stack_i;
node->children = (rxml_node_t*)calloc(1, sizeof(*node));
node = node->children;
}
else {
node->next = (rxml_node_t*)calloc(1, sizeof(*node));
node = node->next;
}
}
else {
node = doc->root_node = (rxml_node_t*)calloc(1, sizeof(*node));
}
if (node->name)
free(node->name);
node->name = strdup(x.elem);
attr = NULL;
++level;
break;
case YXML_ELEMEND:
--level;
if (valptr > buf->val) {
*valptr = '\0';
/* Original code was broken here:
* > If an element ended on two successive
* iterations, on the second iteration
* the 'data' for the *previous* node would
* get overwritten
* > This effectively erased the data for the
* previous node, *and* caused a memory leak
* (due to the double strdup())
* It seems the correct thing to do here is
* only copy the data if the current 'level'
* and 'stack index' are the same... */
if (level == stack_i)
case YXML_ELEMSTART:
if (node)
{
if (node->data)
free(node->data);
node->data = strdup(buf->val);
if (level > stack_i)
{
buf->stack[stack_i] = node;
++stack_i;
node->children = (rxml_node_t*)
malloc(sizeof(*node));
node->children->name = NULL;
node->children->data = NULL;
node->children->attrib = NULL;
node->children->children = NULL;
node->children->next = NULL;
node = node->children;
}
else
{
node->next = (rxml_node_t*)
malloc(sizeof(*node));
node->next->name = NULL;
node->next->data = NULL;
node->next->attrib = NULL;
node->next->children = NULL;
node->next->next = NULL;
node = node->next;
}
}
else
node = doc->root_node = (rxml_node_t*)
calloc(1, sizeof(*node));
if (node->name)
free(node->name);
node->name = strdup(x.elem);
attr = NULL;
++level;
break;
case YXML_ELEMEND:
--level;
if (valptr > buf->val)
{
*valptr = '\0';
/* Original code was broken here:
* > If an element ended on two successive
* iterations, on the second iteration
* the 'data' for the *previous* node would
* get overwritten
* > This effectively erased the data for the
* previous node, *and* caused a memory leak
* (due to the double strdup())
* It seems the correct thing to do here is
* only copy the data if the current 'level'
* and 'stack index' are the same... */
if (level == stack_i)
{
if (node->data)
free(node->data);
node->data = strdup(buf->val);
}
valptr = buf->val;
}
valptr = buf->val;
}
if (level < stack_i)
{
--stack_i;
node = buf->stack[stack_i];
}
break;
if (level < stack_i) {
--stack_i;
node = buf->stack[stack_i];
}
break;
case YXML_CONTENT:
for (c = 0; c < sizeof(x.data) && x.data[c]; ++c)
{
*valptr = x.data[c];
++valptr;
}
break;
case YXML_CONTENT:
for (c = 0; c < sizeof(x.data) && x.data[c]; ++c) {
*valptr = x.data[c];
++valptr;
}
break;
case YXML_ATTRSTART:
if (attr)
attr = attr->next = (struct rxml_attrib_node*)calloc(1, sizeof(*attr));
else
attr = node->attrib = (struct rxml_attrib_node*)calloc(1, sizeof(*attr));
case YXML_ATTRSTART:
if (attr)
attr = attr->next = (struct rxml_attrib_node*)calloc(1, sizeof(*attr));
else
attr = node->attrib = (struct rxml_attrib_node*)calloc(1, sizeof(*attr));
if (attr->attrib)
free(attr->attrib);
attr->attrib = strdup(x.attr);
if (attr->attrib)
free(attr->attrib);
attr->attrib = strdup(x.attr);
valptr = buf->val;
break;
valptr = buf->val;
break;
case YXML_ATTRVAL:
for(c = 0; c < sizeof(x.data) && x.data[c]; ++c)
{
*valptr = x.data[c];
++valptr;
}
break;
case YXML_ATTRVAL:
for(c = 0; c < sizeof(x.data) && x.data[c]; ++c) {
*valptr = x.data[c];
++valptr;
}
break;
case YXML_ATTREND:
if (valptr > buf->val)
{
*valptr = '\0';
case YXML_ATTREND:
if (valptr > buf->val) {
*valptr = '\0';
if (attr->value)
free(attr->value);
attr->value = strdup(buf->val);
if (attr->value)
free(attr->value);
attr->value = strdup(buf->val);
valptr = buf->val;
}
break;
valptr = buf->val;
}
break;
default:
break;
default:
break;
}
}