mirror of https://github.com/snes9xgit/snes9x.git
Reduce manual allocation in BML parser and cheats.
Less risk of potential memory leaks.
This commit is contained in:
Brandon Wright
parent
f8a0fadfa1
commit
4f965300f7
226
bml.cpp
226
bml.cpp
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@ -5,31 +5,9 @@
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#include "port.h"
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#include "bml.h"
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static char *strndup_p(char *str, int len)
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bml_node::bml_node()
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{
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char *buffer;
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int n;
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buffer = (char *) malloc (len + 1);
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if (buffer)
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{
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for (n = 0; ((n < len) && (str[n] != 0)); n++) buffer[n] = str[n];
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buffer[n] = '\0';
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}
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return buffer;
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}
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static inline bml_node *bml_node_new (void)
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{
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bml_node *node = new bml_node;
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node->data = NULL;
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node->name = NULL;
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node->depth = -1;
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return node;
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depth = -1;
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}
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static inline int islf(char c)
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@ -54,45 +32,42 @@ static inline int bml_valid (char c)
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return (isalnum (c) || c == '-');
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}
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static char *strndup_trim (char *str, int len)
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static std::string trim(std::string str)
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{
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int start;
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int end;
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for (start = 0; str[start] && start != len && isblank (str[start]); start++) {}
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if (!str[start] || start >= len)
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return strdup ("");
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for (end = len - 1; isblank (str[end]) || str[end] == '\n' || str[end] == '\r'; end--) {}
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return strndup_p (str + start, end - start + 1);
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for (start = 0; str[start] && start != (int)str.length() && isblank (str[start]); start++) {}
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if (start >= (int)str.length())
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return std::string("");
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for (end = str.length() - 1; isblank (str[end]) || str[end] == '\n' || str[end] == '\r'; end--) {}
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return str.substr(start, end - start + 1);
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}
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static inline unsigned int bml_read_depth (char *data)
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static inline unsigned int bml_read_depth(char *data)
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{
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unsigned int depth;
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for (depth = 0; isblank (data[depth]); depth++) {}
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for (depth = 0; isblank(data[depth]); depth++) {}
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return depth;
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}
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static void bml_parse_depth (bml_node *node, char **data)
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static void bml_parse_depth(bml_node &node, char **data)
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{
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unsigned int depth = bml_read_depth (*data);
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unsigned int depth = bml_read_depth(*data);
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*data += depth;
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node->depth = depth;
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node.depth = depth;
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}
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static void bml_parse_name (bml_node *node, char **data)
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static void bml_parse_name(bml_node &node, char **data)
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{
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int len;
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for (len = 0; bml_valid(*(*data + len)); len++) {};
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node->name = strndup_trim (*data, len);
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node.name = trim(std::string(*data, len));
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*data += len;
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}
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static void bml_parse_data (bml_node *node, char **data)
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static void bml_parse_data(bml_node &node, char **data)
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{
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char *p = *data;
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int len;
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@ -100,37 +75,37 @@ static void bml_parse_data (bml_node *node, char **data)
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if (p[0] == '=' && p[1] == '\"')
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{
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len = 2;
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while (p[len] && p[len] != '\"' && !islf (p[len]))
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while (p[len] && p[len] != '\"' && !islf(p[len]))
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len++;
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if (p[len] != '\"')
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return;
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node->data = strndup_p (p + 2, len - 2);
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node.data = std::string(p + 2, len - 2);
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*data += len + 1;
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}
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else if (*p == '=')
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{
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len = 1;
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while (p[len] && !islf (p[len]) && p[len] != '"' && p[len] != ' ')
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while (p[len] && !islf(p[len]) && p[len] != '"' && p[len] != ' ')
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len++;
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if (p[len] == '\"')
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return;
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node->data = strndup_trim (p + 1, len - 1);
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node.data = std::string(p + 1, len - 1);
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*data += len;
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}
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else if (*p == ':')
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{
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len = 1;
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while (p[len] && !islf (p[len]))
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while (p[len] && !islf(p[len]))
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len++;
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node->data = strndup_trim (p + 1, len - 1);
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node.data = std::string(p + 1, len - 1);
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*data += len;
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}
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return;
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}
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static void bml_skip_empty (char **data)
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static void bml_skip_empty(char **data)
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{
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char *p = *data;
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@ -182,39 +157,38 @@ static char *bml_read_line (char **data)
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return line;
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}
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static void bml_parse_attr (bml_node *node, char **data)
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static void bml_parse_attr(bml_node &node, char **data)
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{
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char *p = *data;
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bml_node *n;
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int len;
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while (*p && !islf (*p))
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while (*p && !islf(*p))
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{
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if (*p != ' ')
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return;
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while (isblank (*p))
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while (isblank(*p))
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p++;
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if (p[0] == '/' && p[1] == '/')
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break;
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n = bml_node_new ();
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bml_node n;
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len = 0;
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while (bml_valid (p[len]))
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len++;
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while (bml_valid(p[len]))
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len++;
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if (len == 0)
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return;
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n->name = strndup_trim (p, len);
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n.name = trim(std::string(p, len));
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p += len;
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bml_parse_data (n, &p);
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n->depth = bml_attr_type;
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node->child.push_back (n);
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bml_parse_data(n, &p);
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n.depth = bml_attr_type;
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node.child.push_back(n);
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}
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*data = p;
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}
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static int contains_space (char *str)
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static int contains_space (const char *str)
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{
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for (int i = 0; str[i]; i++)
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{
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@ -225,39 +199,36 @@ static int contains_space (char *str)
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return 0;
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}
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static void bml_print_node (bml_node *node, int depth)
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static void bml_print_node(bml_node &node, int depth)
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{
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int i;
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if (!node)
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return;
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for (i = 0; i < depth * 2; i++)
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{
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printf (" ");
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}
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if (node->name)
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printf ("%s", node->name);
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if (!node.name.empty())
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printf ("%s", node.name.c_str());
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if (node->data)
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if (!node.data.empty())
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{
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if (contains_space (node->data))
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printf ("=\"%s\"", node->data);
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if (contains_space(node.data.c_str()))
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printf ("=\"%s\"", node.data.c_str());
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else
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printf (": %s", node->data);
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printf (": %s", node.data.c_str());
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}
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for (i = 0; i < (int) node->child.size () && node->child[i]->depth == bml_attr_type; i++)
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for (i = 0; i < (int) node.child.size () && node.child[i].depth == bml_attr_type; i++)
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{
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if (node->child[i]->name)
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if (!node.child[i].name.empty())
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{
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printf (" %s", node->child[i]->name);
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if (node->child[i]->data)
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printf (" %s", node.child[i].name.c_str());
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if (!node.child[i].data.empty())
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{
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if (contains_space (node->child[i]->data))
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printf ("=\"%s\"", node->child[i]->data);
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if (contains_space(node.child[i].data.c_str()))
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printf ("=\"%s\"", node.child[i].data.c_str());
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else
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printf ("=%s", node->child[i]->data);
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printf ("=%s", node.child[i].data.c_str());
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}
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}
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}
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@ -265,124 +236,97 @@ static void bml_print_node (bml_node *node, int depth)
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if (depth >= 0)
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printf ("\n");
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for (; i < (int) node->child.size(); i++)
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for (; i < (int) node.child.size(); i++)
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{
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bml_print_node (node->child[i], depth + 1);
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bml_print_node (node.child[i], depth + 1);
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}
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if (depth == 0)
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printf ("\n");
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}
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void bml_print_node (bml_node *node)
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void bml_node::print()
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{
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bml_print_node (node, -1);
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bml_print_node(*this, -1);
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}
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static bml_node *bml_parse_node (char **doc)
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static bml_node bml_parse_node(char **doc)
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{
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char *line;
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bml_node *node = NULL;
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bml_node node;
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if ((line = bml_read_line (doc)))
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if ((line = bml_read_line(doc)))
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{
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node = bml_node_new ();
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bml_parse_depth (node, &line);
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bml_parse_name (node, &line);
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bml_parse_data (node, &line);
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bml_parse_attr (node, &line);
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bml_parse_depth(node, &line);
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bml_parse_name(node, &line);
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bml_parse_data(node, &line);
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bml_parse_attr(node, &line);
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}
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else
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return NULL;
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return node;
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bml_skip_empty (doc);
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while (*doc && (int) bml_read_depth (*doc) > node->depth)
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bml_skip_empty(doc);
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while (*doc && (int)bml_read_depth(*doc) > node.depth)
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{
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bml_node *child = bml_parse_node (doc);
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bml_node child = bml_parse_node(doc);
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if (child)
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node->child.push_back (child);
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if (child.depth != -1)
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node.child.push_back(child);
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bml_skip_empty (doc);
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bml_skip_empty(doc);
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}
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return node;
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}
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void bml_free_node (bml_node *node)
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void bml_node::parse(char *doc)
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{
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delete[] (node->name);
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delete[] (node->data);
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bml_node node;
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char *ptr = doc;
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for (unsigned int i = 0; i < node->child.size(); i++)
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while ((node = bml_parse_node (&ptr)).depth != -1)
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{
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bml_free_node (node->child[i]);
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delete node->child[i];
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child.push_back(node);
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}
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return;
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}
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bml_node *bml_parse (char **doc)
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{
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bml_node *root = NULL;
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bml_node *node = NULL;
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char *ptr = *doc;
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root = bml_node_new ();
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while ((node = bml_parse_node (&ptr)))
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{
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root->child.push_back (node);
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}
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if (!root->child.size())
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{
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delete root;
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root = NULL;
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}
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return root;
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}
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bml_node *bml_find_sub (bml_node *n, const char *name)
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bml_node *bml_node::find_subnode (std::string name)
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{
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unsigned int i;
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for (i = 0; i < n->child.size (); i++)
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for (i = 0; i < child.size (); i++)
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{
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if (!strcasecmp (n->child[i]->name, name))
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return n->child[i];
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if (name.compare(child[i].name) == 0)
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return &child[i];
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}
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return NULL;
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}
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bml_node *bml_parse_file (const char *filename)
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bool bml_node::parse_file(const char *filename)
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{
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FILE *file = NULL;
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char *buffer = NULL;
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int file_size = 0;
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bml_node *node = NULL;
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file = fopen (filename, "rb");
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file = fopen(filename, "rb");
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if (!file)
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return NULL;
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return false;
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fseek (file, 0, SEEK_END);
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file_size = ftell (file);
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fseek (file, 0, SEEK_SET);
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fseek(file, 0, SEEK_END);
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file_size = ftell(file);
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fseek(file, 0, SEEK_SET);
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buffer = new char[file_size + 1];
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fread (buffer, file_size, 1, file);
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fread(buffer, file_size, 1, file);
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buffer[file_size] = '\0';
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fclose(file);
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fclose (file);
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node = bml_parse (&buffer);
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parse(buffer);
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delete[] buffer;
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return node;
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return true;
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}
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32
bml.h
32
bml.h
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@ -1,31 +1,23 @@
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#ifndef __BML_H
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#define __BML_H
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#include <vector>
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#include <string>
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const int bml_attr_type = -2;
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typedef struct bml_node
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struct bml_node
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{
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char *name;
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char *data;
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bml_node();
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bool parse_file(const char *filename);
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void parse(char *buffer);
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bml_node *find_subnode(std::string name);
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void print();
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static const int bml_attr_type = -2;
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std::string name;
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std::string data;
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int depth;
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std::vector<bml_node *> child;
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} bml_node;
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bml_node *bml_find_sub (bml_node *node, const char *name);
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bml_node *bml_parse_file (const char *filename);
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/* Parse character array into BML tree. Destructive to input. */
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bml_node *bml_parse (char **buffer);
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/* Recursively free bml_node and substructures */
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void bml_free_node (bml_node *);
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/* Print node structure to stdout */
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void bml_print_node (bml_node *);
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std::vector<bml_node> child;
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};
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#endif
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2
cheats.h
2
cheats.h
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@ -86,7 +86,7 @@ void S9xUpdateCheatsInMemory (void);
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int S9xImportCheatsFromDatabase(const char *filename);
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void S9xCheatsDisable (void);
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void S9xCheatsEnable (void);
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char *S9xCheatValidate (char *cheat);
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char *S9xCheatValidate (const char *cheat);
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void S9xInitCheatData (void);
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void S9xInitWatchedAddress (void);
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56
cheats2.cpp
56
cheats2.cpp
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@ -493,7 +493,7 @@ char *S9xCheatGroupToText (SCheatGroup *g)
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return strdup (text.c_str ());
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}
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char *S9xCheatValidate (char *code_string)
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char *S9xCheatValidate (const char *code_string)
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{
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SCheatGroup g = S9xCreateCheatGroup ("temp", code_string);
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@ -532,7 +532,7 @@ void S9xUpdateCheatsInMemory (void)
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}
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}
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static int S9xCheatIsDuplicate (char *name, char *code)
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static int S9xCheatIsDuplicate (const char *name, const char *code)
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{
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unsigned int i;
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@ -564,26 +564,26 @@ static void S9xLoadCheatsFromBMLNode (bml_node *n)
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for (i = 0; i < n->child.size (); i++)
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{
|
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if (!strcasecmp (n->child[i]->name, "cheat"))
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if (!strcasecmp (n->child[i].name.c_str(), "cheat"))
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{
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char *desc = NULL;
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char *code = NULL;
|
||||
const char *desc = NULL;
|
||||
const char *code = NULL;
|
||||
bool8 enabled = false;
|
||||
|
||||
bml_node *c = n->child[i];
|
||||
bml_node *c = &n->child[i];
|
||||
bml_node *tmp = NULL;
|
||||
|
||||
tmp = bml_find_sub(c, "name");
|
||||
tmp = c->find_subnode("name");
|
||||
if (!tmp)
|
||||
desc = (char *) "";
|
||||
else
|
||||
desc = tmp->data;
|
||||
desc = tmp->data.c_str();
|
||||
|
||||
tmp = bml_find_sub(c, "code");
|
||||
tmp = c->find_subnode("code");
|
||||
if (tmp)
|
||||
code = tmp->data;
|
||||
code = tmp->data.c_str();
|
||||
|
||||
if (bml_find_sub(c, "enable"))
|
||||
if (c->find_subnode("enable"))
|
||||
enabled = true;
|
||||
|
||||
if (code && !S9xCheatIsDuplicate (desc, code))
|
||||
|
|
@ -633,23 +633,18 @@ static bool8 S9xLoadCheatFileClassic (const char *filename)
|
|||
|
||||
bool8 S9xLoadCheatFile (const char *filename)
|
||||
{
|
||||
bml_node *bml = NULL;
|
||||
bml_node *n = NULL;
|
||||
|
||||
bml = bml_parse_file (filename);
|
||||
if (!bml)
|
||||
bml_node bml;
|
||||
if (!bml.parse_file(filename))
|
||||
{
|
||||
return S9xLoadCheatFileClassic (filename);
|
||||
}
|
||||
|
||||
n = bml_find_sub (bml, "cheat");
|
||||
bml_node *n = bml.find_subnode("cheat");
|
||||
if (n)
|
||||
{
|
||||
S9xLoadCheatsFromBMLNode (bml);
|
||||
S9xLoadCheatsFromBMLNode (&bml);
|
||||
}
|
||||
|
||||
bml_free_node (bml);
|
||||
|
||||
if (!n)
|
||||
{
|
||||
return S9xLoadCheatFileClassic (filename);
|
||||
|
|
@ -736,15 +731,13 @@ void S9xCheatsEnable (void)
|
|||
|
||||
int S9xImportCheatsFromDatabase (const char *filename)
|
||||
{
|
||||
bml_node *bml;
|
||||
char sha256_txt[65];
|
||||
char hextable[] = "0123456789abcdef";
|
||||
unsigned int i;
|
||||
|
||||
bml = bml_parse_file (filename);
|
||||
|
||||
if (!bml)
|
||||
return -1; /* No file */
|
||||
bml_node bml;
|
||||
if (!bml.parse_file(filename))
|
||||
return -1; // No file
|
||||
|
||||
for (i = 0; i < 32; i++)
|
||||
{
|
||||
|
|
@ -753,25 +746,22 @@ int S9xImportCheatsFromDatabase (const char *filename)
|
|||
}
|
||||
sha256_txt[64] = '\0';
|
||||
|
||||
for (i = 0; i < bml->child.size (); i++)
|
||||
for (i = 0; i < bml.child.size (); i++)
|
||||
{
|
||||
if (!strcasecmp (bml->child[i]->name, "cartridge"))
|
||||
if (!strcasecmp (bml.child[i].name.c_str(), "cartridge"))
|
||||
{
|
||||
bml_node *n;
|
||||
|
||||
if ((n = bml_find_sub (bml->child[i], "sha256")))
|
||||
if ((n = bml.child[i].find_subnode ("sha256")))
|
||||
{
|
||||
if (!strcasecmp (n->data, sha256_txt))
|
||||
if (!strcasecmp (n->data.c_str(), sha256_txt))
|
||||
{
|
||||
S9xLoadCheatsFromBMLNode (bml->child[i]);
|
||||
bml_free_node (bml);
|
||||
S9xLoadCheatsFromBMLNode (&bml.child[i]);
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
bml_free_node (bml);
|
||||
|
||||
return -2; /* No codes */
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue