TetaTricks/code/C/demo-strtok.c

58 lines
1.3 KiB
C

/*
* +-------------+
* | demo strtok |
* +-------------+
*/
#include <stdio.h>
#include <string.h>
#include <ctype.h>
/*-------------------------------------------------------*/
void dump_line(char *titre, char *ligne, int combien)
{
int foo;
unsigned char *ptr;
printf(" --- %s\n", titre);
ptr = (unsigned char *)ligne;
for (foo=0; foo<combien; foo++) {
if (ptr[foo]) printf("%02x ", ptr[foo]);
else printf("\\0 ");
}
puts("");
for (foo=0; foo<combien; foo++) {
printf(" %c ", isprint(ptr[foo]) ? ptr[foo] : ' ');
}
puts("");
}
/*-------------------------------------------------------*/
int main(int argc, char *argv[])
{
char input[] = "foo bar\tquux wiz";
char *cptr, *copie;
int foo;
dump_line("original", input, sizeof(input));
copie = strdup(input);
dump_line("copie", copie, sizeof(input));
puts("");
cptr = strtok(copie, " \t");
dump_line("1er strtok", copie, sizeof(input));
printf(" got [%s]\n", cptr);
puts("");
puts(" two more strtok...");
cptr = strtok(NULL, " \t");
printf(" got [%s]\n", cptr);
cptr = strtok(NULL, " \t");
printf(" got [%s]\n", cptr);
dump_line("2eme & 3me strtok", copie, sizeof(input));
foo = cptr - copie; /* this is the hack :) */
printf(" index = %d\n", foo);
printf(" and we have [%s] :)\n", input+foo);
return 0;
}