mirror of
https://github.com/libretro/snes9x.git
synced 2024-11-23 00:09:40 +00:00
C++ification of bml parser.
This commit is contained in:
Brandon Wright
parent
abed48e2d0
commit
124323f614
267
bml.cpp
267
bml.cpp
@ -1,5 +1,7 @@
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#include <vector>
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#include <string.h>
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#include <iostream>
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#include <fstream>
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#include <stack>
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#include <stdio.h>
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#include "port.h"
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@ -21,6 +23,11 @@ static inline int isblank(char c)
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return (c == ' ' || c == '\t');
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}
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static inline int isblankorlf(char c)
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{
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return (islf(c) || isblank(c));
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}
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static inline int isalnum(char c)
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{
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return ((c >= 'a' && c <= 'z') ||
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@ -28,173 +35,151 @@ static inline int isalnum(char c)
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(c >= '0' && c <= '9'));
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}
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static inline int bml_valid (char c)
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static inline int bml_valid(char c)
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{
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return (isalnum (c) || c == '-');
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return (isalnum(c) || c == '-');
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}
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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 != (int)str.length() && isblank (str[start]); start++) {}
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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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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 std::string trimcomments(std::string str)
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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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return depth;
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int end = str.length();
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size_t comment = str.find("//");
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if (comment != std::string::npos)
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end = comment;
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for (int i = end - 1; i >= 0; i--)
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{
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if (!isblankorlf(str[i]))
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{
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end = i + 1;
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break;
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}
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}
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return str.substr(0, end);
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}
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static void bml_parse_depth(bml_node &node, char **data)
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static inline int bml_read_depth(std::string &data)
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{
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unsigned int depth = bml_read_depth(*data);
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*data += depth;
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size_t depth;
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for (depth = 0; isblank(data[depth]) && depth < data.length(); depth++) {}
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return depth == data.length() ? -1 : depth;
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}
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static void bml_parse_depth(bml_node &node, std::string &line)
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{
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unsigned int depth = bml_read_depth(line);
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line.erase(0, 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, std::string &line)
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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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for (len = 0; bml_valid(line[len]); len++) {};
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node.name = trim(std::string(*data, len));
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*data += len;
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node.name = trim(line.substr(0, len));
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line.erase(0, 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, std::string &line)
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{
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char *p = *data;
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int len;
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if (p[0] == '=' && p[1] == '\"')
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if (line[0] == '=' && line[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 (line[len] && line[len] != '\"' && !islf(line[len]))
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len++;
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if (p[len] != '\"')
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if (line[len] != '\"')
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return;
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node.data = std::string(p + 2, len - 2);
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*data += len + 1;
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node.data = line.substr(2, len - 2);
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line.erase(0, len + 1);
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}
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else if (*p == '=')
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else if (line[0] == '=')
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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 (line[len] && !islf(line[len]) && line[len] != '"' && line[len] != ' ')
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len++;
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if (p[len] == '\"')
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if (line[len] == '\"')
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return;
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node.data = std::string(p + 1, len - 1);
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*data += len;
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node.data = line.substr(1, len - 1);
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line.erase(0, len);
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}
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else if (*p == ':')
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else if (line[0] == ':')
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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 (line[len] && !islf(line[len]))
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len++;
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node.data = std::string(p + 1, len - 1);
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*data += len;
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node.data = line.substr(1, len - 1);
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line.erase(0, 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 std::string bml_read_line(std::ifstream &fd)
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{
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char *p = *data;
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std::string line;
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while (*p)
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while (fd)
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{
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for (; *p && isblank (*p) ; p++) {}
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if (!islf(p[0]) && (p[0] != '/' && p[1] != '/'))
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return;
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/* Skip comment data */
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while (*p && *p != '\r' && *p != '\n')
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p++;
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/* If we found new-line, try to skip more */
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if (*p)
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std::getline(fd, line);
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line = trimcomments(line);
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if (!line.empty())
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{
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p++;
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*data = p;
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return line;
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}
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}
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return std::string("");
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}
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static char *bml_read_line (char **data)
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static void bml_parse_attr(bml_node &node, std::string &line)
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{
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char *line;
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char *p;
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bml_skip_empty (data);
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line = *data;
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if (line == NULL || *line == '\0')
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return NULL;
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p = strpbrk (line, "\r\n\0");
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if (p == NULL)
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return NULL;
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if (islf (*p))
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{
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*p = '\0';
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p++;
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}
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*data = p;
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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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{
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char *p = *data;
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int len;
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while (*p && !islf(*p))
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while (line.length() > 0)
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{
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if (*p != ' ')
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if (!isblank(line[0]))
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return;
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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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while (isblank(line[0]))
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line.erase(0, 1);
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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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while (bml_valid(line[len]))
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len++;
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if (len == 0)
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return;
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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.name = trim(line.substr(0, len));
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line.erase(0, len);
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bml_parse_data(n, line);
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n.depth = node.depth + 1;
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n.type = bml_node::CHILD;
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n.type = bml_node::ATTRIBUTE;
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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 (const 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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if (isblank (str[i]))
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if (isblank(str[i]))
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return 1;
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}
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@ -207,44 +192,44 @@ static void bml_print_node(bml_node &node, int depth)
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for (i = 0; i < depth * 2; i++)
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{
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printf (" ");
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printf(" ");
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}
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if (!node.name.empty())
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printf ("%s", node.name.c_str());
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printf("%s", node.name.c_str());
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if (!node.data.empty())
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{
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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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printf("=\"%s\"", node.data.c_str());
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else
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printf (": %s", node.data.c_str());
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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].type == bml_node::CHILD; i++)
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for (i = 0; i < (int)node.child.size() && node.child[i].type == bml_node::ATTRIBUTE; i++)
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{
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if (!node.child[i].name.empty())
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{
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printf (" %s", node.child[i].name.c_str());
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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.c_str()))
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printf ("=\"%s\"", 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.c_str());
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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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if (depth >= 0)
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printf ("\n");
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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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printf("\n");
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}
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void bml_node::print()
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@ -252,53 +237,39 @@ void bml_node::print()
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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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void bml_node::parse(std::ifstream &fd)
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{
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char *line;
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bml_node node;
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std::stack<bml_node *> nodestack;
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nodestack.push(this);
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if ((line = bml_read_line(doc)))
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while (fd)
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{
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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 node;
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bml_node newnode;
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std::string line = bml_read_line(fd);
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if (line.empty())
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return;
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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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int line_depth = bml_read_depth(line);
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while (line_depth <= nodestack.top()->depth && nodestack.size() > 1)
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nodestack.pop();
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if (child.depth != -1)
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node.child.push_back(child);
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bml_parse_depth(newnode, line);
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bml_parse_name(newnode, line);
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bml_parse_data(newnode, line);
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bml_parse_attr(newnode, line);
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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_node::parse(char *doc)
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{
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bml_node node;
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char *ptr = doc;
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while ((node = bml_parse_node (&ptr)).depth != -1)
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{
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child.push_back(node);
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nodestack.top()->child.push_back(newnode);
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nodestack.push(&nodestack.top()->child.back());
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}
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return;
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}
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bml_node *bml_node::find_subnode (std::string 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 < child.size (); i++)
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for (i = 0; i < child.size(); i++)
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{
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if (name.compare(child[i].name) == 0)
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return &child[i];
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@ -307,28 +278,14 @@ bml_node *bml_node::find_subnode (std::string name)
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return NULL;
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}
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bool bml_node::parse_file(const char *filename)
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bool bml_node::parse_file(std::string 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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file = fopen(filename, "rb");
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std::ifstream file(filename, std::ios_base::binary);
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if (!file)
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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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buffer = new char[file_size + 1];
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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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parse(buffer);
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delete[] buffer;
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parse(file);
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return true;
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}
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5
bml.h
5
bml.h
@ -2,6 +2,7 @@
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#define __BML_H
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#include <vector>
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#include <string>
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#include <fstream>
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struct bml_node
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{
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@ -11,8 +12,8 @@ struct bml_node
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};
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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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bool parse_file(std::string filename);
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void parse(std::ifstream &fd);
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bml_node *find_subnode(std::string name);
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void print();
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