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// tokenize.c
// Author: Nat Tuck
// 3650F2017, Challenge01 Hints
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "tokenize.h"
typedef int (*char_pred)(char);
int
is_op_char(char cc)
{
return cc == '<' || cc == '>'
|| cc == '|' || cc == '&'
|| cc == ';';
}
int
is_nop_char(char cc)
{
return cc != 0 && !is_op_char(cc) && !isspace(cc);
}
char*
get_tok(char* text, char_pred cpred)
{
char* tt = malloc(256);
int ii = 0;
for (; cpred(text[ii]); ++ii) {
tt[ii] = text[ii];
}
tt[ii] = 0;
return tt;
}
svec*
tokenize(char* text)
{
svec* xs = make_svec();
while (text[0]) {
if (isspace(text[0])) {
text++;
continue;
}
char* tt;
if (is_op_char(text[0])) {
tt = get_tok(text, is_op_char);
}
else {
tt = get_tok(text, is_nop_char);
}
svec_push_back(xs, tt);
text += strlen(tt);
free(tt);
}
return xs;
}
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