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rxml read from string and fix memory violation

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This commit is contained in:
Huw Pascoe 2019-04-01 20:43:20 +01:00
parent cd714dbd0b
commit ea931428e1
2 changed files with 38 additions and 26 deletions
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47
libretro-common/formats/xml/rxml.c
View File

@ -66,20 +66,17 @@ static void rxml_free_node(struct rxml_node *node)
{
struct rxml_attrib_node *next_attrib = NULL;
if (!attrib_node_head)
continue;
next_attrib = (struct rxml_attrib_node*)attrib_node_head->next;
if (!next_attrib)
continue;
if (next_attrib)
{
if (attrib_node_head->attrib)
free(attrib_node_head->attrib);
if (attrib_node_head->value)
free(attrib_node_head->value);
if (attrib_node_head)
free(attrib_node_head);
}
attrib_node_head = next_attrib;
}
@ -420,8 +417,6 @@ rxml_document_t *rxml_load_document(const char *path)
{
rxml_document_t *doc;
char *memory_buffer = NULL;
char *new_memory_buffer = NULL;
const char *mem_ptr = NULL;
long len = 0;
RFILE *file = filestream_open(path,
RETRO_VFS_FILE_ACCESS_READ,
@ -429,10 +424,6 @@ rxml_document_t *rxml_load_document(const char *path)
if (!file)
return NULL;
doc = (rxml_document_t*)calloc(1, sizeof(*doc));
if (!doc)
goto error;
len = filestream_get_size(file);
memory_buffer = (char*)malloc(len + 1);
if (!memory_buffer)
@ -445,17 +436,38 @@ rxml_document_t *rxml_load_document(const char *path)
filestream_close(file);
file = NULL;
mem_ptr = memory_buffer;
doc = rxml_load_document_string(memory_buffer);
free(memory_buffer);
return doc;
error:
free(memory_buffer);
if(file)
filestream_close(file);
return NULL;
}
rxml_document_t *rxml_load_document_string(const char *str)
{
rxml_document_t *doc;
char *memory_buffer = NULL;
const char *mem_ptr = NULL;
doc = (rxml_document_t*)calloc(1, sizeof(*doc));
if (!doc)
goto error;
mem_ptr = str;
if (!validate_header(&mem_ptr))
goto error;
new_memory_buffer = purge_xml_comments(mem_ptr);
if (!new_memory_buffer)
memory_buffer = purge_xml_comments(mem_ptr);
if (!memory_buffer)
goto error;
free(memory_buffer);
mem_ptr = memory_buffer = new_memory_buffer;
mem_ptr = memory_buffer;
doc->root_node = rxml_parse_node(&mem_ptr);
if (!doc->root_node)
@ -466,7 +478,6 @@ rxml_document_t *rxml_load_document(const char *path)
error:
free(memory_buffer);
filestream_close(file);
rxml_free_document(doc);
return NULL;
}

5
libretro-common/include/formats/rxml.h
View File

@ -46,7 +46,7 @@ struct rxml_attrib_node
struct rxml_attrib_node *next;
};
struct rxml_node
typedef struct rxml_node
{
char *name;
char *data;
@ -54,9 +54,10 @@ struct rxml_node
struct rxml_node *children;
struct rxml_node *next;
};
} rxml_node_t;
rxml_document_t *rxml_load_document(const char *path);
rxml_document_t *rxml_load_document_string(const char *str);
void rxml_free_document(rxml_document_t *doc);
struct rxml_node *rxml_root_node(rxml_document_t *doc);