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#include "tokenizer.h"
#include <ctype.h>
#include "util/debug.h"
#define EOL '\0'
const char *ksh_tok_type_str[] = {"text", "<", ">", ">>", "end of line", ""};
long kshell_next_token(kshell_t *ksh, char *line, kshell_token_t *token)
{
KASSERT(NULL != ksh);
KASSERT(NULL != line);
KASSERT(NULL != token);
size_t i = 0;
while (line[i] != EOL && isspace(line[i]))
++i;
token->kt_text = line + i;
/* Determine the token type */
switch (line[i])
{
case EOL:
token->kt_type = KTT_EOL;
token->kt_textlen = 0;
break;
case '<':
token->kt_type = KTT_REDIRECT_IN;
token->kt_textlen = i = 1;
break;
case '>':
if (line[i + 1] == '>')
{
token->kt_type = KTT_REDIRECT_OUT_APPEND;
token->kt_textlen = i = 2;
}
else
{
token->kt_type = KTT_REDIRECT_OUT;
token->kt_textlen = i = 1;
}
break;
default:
token->kt_type = KTT_WORD;
token->kt_textlen = 0;
break;
}
switch (token->kt_type)
{
case KTT_WORD:
while (!isspace(line[i]) && line[i] != '<' && line[i] != '>' &&
line[i] != EOL)
{
++i;
++token->kt_textlen;
}
break;
case KTT_EOL:
return 0;
default:
break;
}
return i;
}
const char *kshell_token_type_str(kshell_token_type_t type)
{
KASSERT(type < KTT_MAX);
return ksh_tok_type_str[type];
}
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