f_loadlabel.c

《unix/Linux下的Curses库开发指南》综合示例程序

/*
 *  loadlabel.c
 *  标签元素装载模块
 *  作者:张中庆
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "xmlparse.h"
#include "f_menuhead.h"

F_LABELNODE 	*load_label=NULL;//标签链表
int		load_label_num=-1;//标签数目
int		current_label_id=-1;//当前的标签号

#define LABEL_MAX_DEPTH 3 //最大深度
#define TEXT_MAX_LENGTH 20 //最大深度

int 		label_current_depth=-1;
char		label_mark_name[LABEL_MAX_DEPTH][20];
F_LABELNODE*	tmp_label=NULL;//临时的标签节点

void label_get_data( XML_Parser parser, const XML_Char * s, int len )
{
    char*		tmp_buf;
    char*		p_str;
    p_str=(char*)s;
    tmp_buf=(char*)malloc(len+1);
    strncpy(tmp_buf,p_str,len);//
    tmp_buf[len]='\0';
    //LTrim(tmp_buf);
    //RTrim(tmp_buf);
    Convert8859( tmp_buf );
    if(strlen(tmp_buf)==0){
	free(tmp_buf);
	return;
    }
    if(label_current_depth==1){
	if(strcmp(label_mark_name[label_current_depth],"label_num")==0){
  	    load_label_num=atoi(tmp_buf);
	    load_label=(F_LABELNODE*)calloc(load_label_num,sizeof(F_LABELNODE));
	    memset(load_label,0x0,sizeof(F_LABELNODE)*load_label_num);
	}
    }
    else if(label_current_depth==2){//如果当前深度是2,则表明可能进入标签属性区域
	if(strcmp(label_mark_name[label_current_depth],"label_text")==0)
	    strcpy(tmp_label->label_text,tmp_buf);
	else if(strcmp(label_mark_name[label_current_depth],"label_x")==0)
	    tmp_label->begin_x=atoi(tmp_buf);
	else if(strcmp(label_mark_name[label_current_depth],"label_y")==0)
	    tmp_label->begin_y=atoi(tmp_buf);
	else if(strcmp(label_mark_name[label_current_depth],"label_attr")==0)
	    tmp_label->attrs=atoi(tmp_buf);
	else if(strcmp(label_mark_name[label_current_depth],"label_length")==0)
	    tmp_label->label_length=atoi(tmp_buf);
	else if(strcmp(label_mark_name[label_current_depth],"label_bkgr_color")==0)
	    tmp_label->bkgr_color=atoi(tmp_buf);
	else if(strcmp(label_mark_name[label_current_depth],"label_fore_color")==0)
	    tmp_label->fore_color=atoi(tmp_buf);
    }
    if(tmp_buf!=NULL)
	free(tmp_buf);
}
//遇到<a>格式的时候采取的动作,user_data为自动传送的解析器的句柄,name为标签内容的大写,attr为属性
 void label_start_element( void * user_data, const char * name,
                         const char ** atts )
{
    label_current_depth++;//只要遇到<a>类似的标签,当前深度就加一.
    strcpy(label_mark_name[label_current_depth],name);//
}

 void label_end_element( void * user_data, const char * name )
{
    int id=-1;
    if(label_current_depth==1&&strcmp(name,"label_node")==0){
	current_label_id++;
	id=current_label_id;
	if(id>-1 && id<load_label_num){
	    load_label[id].label_text=(char*)malloc(sizeof(char*)*TEXT_MAX_LENGTH);
	    memset(load_label[id].label_text,0x0,sizeof(char*)*TEXT_MAX_LENGTH);
	    strcpy(load_label[id].label_text,tmp_label->label_text);
	    load_label[id].id=id;
	    load_label[id].begin_y=tmp_label->begin_y;
	    load_label[id].begin_x=tmp_label->begin_x;
	    load_label[id].label_length=tmp_label->label_length;
	    load_label[id].bkgr_color=tmp_label->bkgr_color;
	    load_label[id].fore_color=tmp_label->fore_color;
	    load_label[id].attrs=tmp_label->attrs;
	    memset(tmp_label,0x0,sizeof(F_LABELNODE));
	    free(tmp_label->label_text);
	    tmp_label->label_text=(char*)malloc(sizeof(TEXT_MAX_LENGTH));
	    memset(tmp_label->label_text,0x0,sizeof(char*)*TEXT_MAX_LENGTH);
	}
    }
    label_current_depth--;
}

/*
 * LOAD 数据元 XML 数据,labeldata为链表地址
 */
int LoadLabelXML( char * xmlfile,  F_LABELLINK** labellink )
{
    int		i, j;

    char	buffer[ BUFSIZ ];
    XML_Parser	parser;
    int		len, done;
    int		depth;
    FILE	* fp;

    current_label_id=-1;//当前的标签号
    load_label=NULL;//标签链表
    load_label_num=-1;//标签数目
    label_current_depth=-1;
    tmp_label=NULL;//临时的标签节点


    if((fp = fopen( xmlfile, "r" )) == NULL )
	return ( -1 );

    *labellink = (F_LABELLINK*)malloc( sizeof( F_LABELLINK) );
    memset( *labellink, 0, sizeof( F_LABELLINK ) );

    tmp_label=(F_LABELNODE*)malloc(sizeof(F_LABELNODE));
    memset(tmp_label,0x0,sizeof(F_LABELNODE));

    tmp_label->label_text=(char*)malloc(sizeof(TEXT_MAX_LENGTH));
    memset(tmp_label->label_text,0x0,sizeof(char*)*TEXT_MAX_LENGTH);

    load_label=NULL;

    parser = XML_ParserCreate( NULL );
    XML_SetUserData( parser, &depth );
    XML_SetElementHandler( parser, label_start_element, label_end_element );
    XML_SetCharacterDataHandler( parser, label_get_data );

    do {
	buffer[0] = 0x0;
	if ( fgets( buffer, sizeof( buffer ), fp ) == NULL )
 	    done = 1;
	else
	    done = 0;
	len = strlen( buffer );
	if ( !XML_Parse( parser, buffer, len, done ) )
	{
	    printf( XML_ErrorString( XML_GetErrorCode( parser ) ) );
	   printf("error occurs at line %d\n",XML_GetCurrentLineNumber(parser));
	    XML_ParserFree( parser );
	    fclose( fp );
	    return ( -1 );
	}
    } while ( !done );

    XML_ParserFree( parser );
    fclose( fp );

    for(i=0;i<load_label_num;i++)
	load_label[i].id=i;	

    (*labellink)->label_num=load_label_num;
    (*labellink)->p_label=load_label;

    return ( 0 );
}

int LabelFree(F_LABELLINK* labellink)
{
    int i;
    if(labellink!=NULL){
	if(labellink->p_label!=NULL)
	{
 	    for(i=0;i<labellink->label_num;i++)
	    {
		if(labellink->p_label[i].label_text!=NULL)
		    free(labellink->p_label[i].label_text);
	    }
	    free(labellink->p_label);
	}
	free(labellink);
    }
    labellink=NULL;
}