config-parser/config.c

#include"config.h"
#include<stdio.h>
#include<stdlib.h>
#include<string.h>

int loadConfig(char *str_file, char **str_entry,char **host,int *intervall,int size)
{
    int i=0;
    FILE *f_config;
    char temp_str[256];
    char *ret = NULL;

    printf("\nopening config file\n");
    f_config = fopen(str_file,"r");
    if(f_config != NULL)
    {
        ret = fgets(temp_str,256,f_config);
        while(ret!=NULL)
        {
        temp_str[strcspn(temp_str,"\n")]=0;
        printf("first temp_str:%s\n",temp_str);
            if(strcmp(temp_str,"[Host]")==0)
            {
                printf("temp_str host:%s\n",temp_str);
                while(ret!=NULL)
                {
                    printf("temp_str:%s\n",temp_str);
                    ret = fgets(temp_str,256,f_config);
                    if(strchr(temp_str,'[')==NULL)
                    {
                        printf("strchr\n");
                        if(strstr(temp_str,"Hostname")!=NULL)
                        {
                            char *ptr_host = strrchr(temp_str,'=')+1;//Without = 
                            ptr_host[strcspn(ptr_host,"\n")]=0;
                            while(ptr_host[0]==' ') //Potential segfault??
                            {
                                if(ptr_host < (temp_str + strlen(temp_str)))
                                {
                                    ptr_host = ptr_host + 1;
                                }else{
                                    break;
                                }
                            }
                            *host = strdup(ptr_host);
                            printf("my host is:%s\n",*host);
                        }
                    }else{
                        break;
                    }
                }
            }
        }
    }
    else
    {
        fprintf(stderr,"error opening file[%s]\n",str_file);
    }
    fclose(f_config);
    printf("Done reading config file\n");
    return 0;
}
/*
 * Here we check if the given string contains a section
 * for example [SECTIONName] here delimiterLeft is [ and delimiterRight is ]
 * if a section is found, the section name will be written to sectionName
 *
 * Input:
 *      char **str: the string to check
 *      char delimiterLeft: the left delimiter to check for
 *      char delimiterRight: the right delimiter to check for
 * Output:
 *      char **sectionName: if found the section Name of the section
 * Return:
 *      int status_code: one of the following values:
 *          
 */

int checkSection(char *str,char delimiterLeft,char delimiterRight,char **sectionName)
{
    char section[MAX_LEN_SECTIONNAME];
    int i = 0;                  //most outer loop -> character of string
    if(str == NULL)
    {
        return ERROR_STR;
    }
    int len = strlen(str);
    printf("strlen: %d",len);
    int state = ST_INIT;
    int leftDelimiterPos=0;
    int rightDelimiterPos=0;
    char *sectionName2 = NULL;
    while(state != ST_FINISH)
    {
        printf("STATE:%i\n",state);
        switch(state) 
        {
            case ST_INIT:
                for(i=0;i<=len;i++)        //find first (left) delimiter    
                {
                    if(str[i] == delimiterLeft)
                    {
                        state = ST_FOUND_LEFT_DELIMITER;
                        leftDelimiterPos = i;
                        break;
                    }
                }
                break;
            case ST_FOUND_LEFT_DELIMITER:
                for(i=0;i<=len;i++)        //find second (right) delimiter    
                {
                    if(str[i] == delimiterRight)
                    {
                        state = ST_FOUND_RIGHT_DELIMITER;
                        rightDelimiterPos = i;
                        break;
                    }
                }
                if(state != ST_FOUND_RIGHT_DELIMITER)
                {
                    return ST_ERROR_NOT_FOUND_RIGHT_DELIMITER;
                }
                break;
            case ST_FOUND_RIGHT_DELIMITER:
                int ret=0;
                sectionName2 = malloc(MAX_LEN_SECTIONNAME*sizeof(char));
                if((ret=getStrAtPos(str,leftDelimiterPos,rightDelimiterPos,&sectionName2,MAX_LEN_SECTIONNAME)) == NO_ERROR)
                {
                    *sectionName = sectionName2;
                    state = ST_FINISH;    
                }else{
                    return ret;
                }
            case ST_FINISH:
                return FOUND_SECTION;
        }
    }
    return NO_SECTION;
}
/*
 * Here we get / cut from fromPos to toPos and write it to an address
 *
 * Input:
 *      char *str: the string to cut
 *      int fromPos: from which position we want to copy, the pos is included and zero indexed
 *      int toPos: to which position we want to copy, the pos is included and zero indexed
 * Output:
 *      char **name: here we will write the section name to
 *  Input:
 *      int sizeName: the size of the user allocated buffer at **name
 */

int getStrAtPos(char *str,int fromPos,int toPos,char **name,int sizeName)
{
    int i=fromPos;      //character iterator, which starts from specified pos
    int j=0;            //the character iterator for the target string
    int diffLen=toPos-fromPos;
    char *ptr_name=*name;
    if(diffLen > MAX_LEN_SECTIONNAME || diffLen>sizeName)
    {
        return ERROR_MAX_LEN;
    }
    for(i=fromPos,j=0;i<=toPos;i++,j++)
    {
        ptr_name[j]  = str[i];
    }
    ptr_name[j+1]='\0';
    printf("*name:%s\n",*name);
    return NO_ERROR;
}


int getNameValuePair(char *str,char leftDelimiterPos,char rightDelimiterPos,char **name,char **value,int sizeName,int sizeValue)
{
    int state=ST_INIT;
    char *ptr_name=*name;
    char *ptr_value=*value;
    int ret=0;

    char *ptrDelimiter=NULL;
    int posDelimiter=0;
    int posEnd=0;

    ptrDelimiter=strchr(str,leftDelimiterPos);
    if(ptrDelimiter==NULL)
    {
        return ERROR_DELIMITER_NOT_FOUND;
    }
    posDelimiter = (ptrDelimiter - str);
    printf("LenUntilDelimiter: %d",posDelimiter);
    if((ret=getStrAtPos(str,0,posDelimiter-1,&ptr_name,MAX_LEN_SECTIONNAME)) == NO_ERROR)
    {
       printf("ptr_name:%s",ptr_name); 
    }else {
        return ret;
    }
    if(rightDelimiterPos == 0)
    {
        posEnd = strlen(str);
    }else{
        posEnd = rightDelimiterPos;
    }

    if((ret=getStrAtPos(str,posDelimiter+1,posEnd,&ptr_value,MAX_LEN_SECTIONNAME)) == NO_ERROR)
    {
       printf("ptr_name:%s\n",ptr_value); 
    }else {
        return ret;
    }
   
    return NO_ERROR;
}