<![CDATA[---------------------------------------------------
| Date: 2004-06-18 22:03:18 |
| Filename: custom_string_tok.c |
| Author: mind@metalshell.com |
| |
| http://www.metalshell.com/ |
---------------------------------------------------
/* Custom String Tokenizer - by mind@metalshell.com
*
* This example is more of an example on predetermined strings such as
* reading in a configuration file and splitting the variable from the value
* in or around quotation marks or equal signs.
*
* See below for porting this to read a configuration file or similar
*
* http://www.metalshell.com
*/
#include <stdio.h>
#include <string.h>
int RunExample();
int main()
{
int x, i;
char tmp[]="writing:your:own:string!tokenizer:yay";
char tnp[strlen(tmp)];
/* See below
*
* int z;
* char exempt[]="!@:$.,";
* char tmp[]="writing,your!own@str.ingto$kenize:ryay";
*
*/
/* Uncomment the next two lines to run the second example */
// RunExample();
// return 1;
/* zero out our temp string */
bzero(tnp, sizeof(tnp));
for (x = 0, i = 0; x < strlen(tmp); x++)
{
/* Use this if you want to parse segments from
* numerous splitters.
*
* for (z = 0; z < strlen(exempt); z++)
* {
* if (tmp[x] == exempt[z])
* {
* .....
* }
* }
*
*/
/* check for end of segment */
if (tmp[x] == ':' || tmp[x] == '!')
{
printf("Extracted segment: %s\n", tnp);
/* zero out our temp string */
bzero(tnp, sizeof(tnp));
/* reset our writing point back to the beginning */
i = 0;
/* start from the beginning of our loop
* this is needed so the loop wont finish
* and write : or ! to tnp[0] */
continue;
}
/* write our character at position tnp[i] from tmp[x] */
tnp[i] = tmp[x];
/* increase our temp string's position */
i++;
}
return 1;
}
/* Extraction method; */
void Extract(char *str)
{
int x, i, y;
char tmp[strlen(str)];
/* zero out our temp string */
bzero(tmp, sizeof(tmp));
for (x = 0, i = 0, y = 0; x < strlen(str); x++)
{
/* check to see if the last loop reached the end of
* our first segment. */
if (!y)
{
/* nope.. check to see if this loop does */
if (str[x] == '=')
{
y = 1;
/* First segment passed; continue back to a new loop
* and search for the next segment */
continue;
}
/* keep looping back until we've gone through the
* first segment (skipping) */
continue;
}
/* check to see if we have passed the first segment */
if (y == 1)
{
/* check if we are at the start of our valued segment */
if (str[x] == 34)
{
/* we are.. setup y so we can start writing our value */
y = 2;
/* continue back to the beginning so we dont write '"' */
continue;
}
/* '"' hasn't been reached yet continue looping.. */
continue;
}
/* check to see if our value is done with an ending '"' */
if (y == 2 && str[x] == 34)
{
/* Everything looks good; zero out our string and
* start writing our temp string to our real string */
bzero(str, strlen(tmp) + 1);
for (x = 0; x < strlen(tmp); x++)
str[x] = tmp[x];
/* end loop */
break;
}
/* write to our temp string */
tmp[i] = str[x];
i++;
}
}
/*
* This section will show the ways you can use this example to
* read in a confiruation file and extract what you want.
*
* user="mind"
* pass="metalshell"
*
*/
int RunExample()
{
char str1[]="user=\"mind\"";
char str2[]="pass=\"metalshell\"";
Extract(str1);
Extract(str2);
printf("User: %s\n", str1);
printf("Pass: %s\n", str2);
return 1;
}
/*
* Since this example is using predetermined strings, I strongly suggest
* if you use this code to read in a configuration file; Please add checks
* on the string your reading in before using Extract(). This example is
* safe to use and has been tested for stability but could still cause issues.
*
* If you have any question's or want help adding checks to this please visit:
* http://www.metalshell.com/forum
*
*/
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