string tokenization and array entires

[blues77]

Hello,

I need a way of taking a string of chars including whitespace(which is used as a delimiter) and putting each series of chars into its own cell in an array. for example

a bgf h ds

will be put into the array as {a , bgf, h, ds}. only the chars are entered...not the whitespace. Any help is greatly apprecited.

Mike

 

[chipperMDW]

Check out the C function strtok.

 

[marsd]

srtok() is deprecated, the man page has the full details.
I'd still use it though, the alternatives are kind of
hackneyed.

I rolled a solution just to see how it could be done, I'm
embarassed to even post it..but., maybe it will give
you an idea, It has some issues..

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

const char alpha[] = &quot;abcdefghijklmnopqrstuvwxyz&quot;;
int is_alpha(char s);
void strbuild(char *str1);

int main(void) {
char mystr[28] = &quot;t is a tes t o fthe &quot;;

strbuild(mystr);

return 0;
}

int is_alpha(char s) {
int y ,j;

for (y=0 ; y <= strlen(alpha) ; y++) {
if (s == alpha[y]) {
return 1;
}
}

return 0;
}

void strbuild(char *str1) {
int y,flg,stp,prev,m = 0;
char **arra;
char *tmp = NULL;

arra[m] = malloc(8);
strcpy(arra[m],&quot;START&quot;


for (y=0 ; y < strlen(str1) ; y++) {
tmp = str1;
flg = is_alpha(str1[y]) > 0 ? 1 : 0;
if (!flg) {
stp = y;
m++;
arra[m] = malloc((stp - prev) + 1);
if ((stp - prev) > 0) {
tmp = tmp + prev;
strncpy(arra[m],tmp,(stp - prev));
}
}
prev = stp;
}

for (y = 0 ; y <= m ; y++) {
printf(&quot;Array content %d :: %s\n&quot;,y, arra[y]);
}
}

 

[marsd]

Here is a cleaned up function.
Works fine for linux i386, gcc 3.x.

char **strbuild(char *str1) {
int y,flg,stp,prev,m = 0;
int sz = strlen(str1);
char *arra[sz];
char *tmp = NULL;


arra[m] = malloc(8);
strcpy(arra[0],&quot;START&quot;

for (y=0 ; y < strlen(str1) ; y++) {
flg = is_alpha(str1[y]) > 0 ? 1 : 0;
tmp = str1;

if (!flg) {
stp = y;
m++;
arra[m] = malloc((stp - prev) + 1);

if ((stp - prev) > 0) {
tmp = tmp + prev;
strncpy(arra[m],tmp,(stp - prev));
}
}

prev = stp;
}
return arra;
}