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/*************************************************************************
* Copyright (C) 2009 Tavian Barnes <tavianator@gmail.com> *
* *
* This file is part of Dimension. *
* *
* Dimension is free software; you can redistribute it and/or modify it *
* under the terms of the GNU General Public License as published by the *
* Free Software Foundation; either version 3 of the License, or (at *
* your option) any later version. *
* *
* Dimension is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/>. *
*************************************************************************/
#include "tokenize.h"
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
dmnsn_array *
dmnsn_tokenize(FILE *file)
{
char c;
dmnsn_token token;
dmnsn_array *tokens = dmnsn_new_array(sizeof(dmnsn_token));
while (!feof(file)) {
fread(&c, 1, 1, file);
if (isspace(c))
continue;
if (c == '{') {
token.type = DMNSN_LBRACE;
token.value = NULL;
dmnsn_array_push(tokens, &token);
} else if (c == '}') {
token.type = DMNSN_RBRACE;
token.value = NULL;
dmnsn_array_push(tokens, &token);
} else {
/* Invalid character */
dmnsn_delete_tokens(tokens);
return NULL;
}
}
return tokens;
}
void
dmnsn_delete_tokens(dmnsn_array *tokens)
{
dmnsn_token *token;
unsigned int i;
for (i = 0; i < dmnsn_array_size(tokens); ++i) {
token = dmnsn_array_at(tokens, i);
free(token->value);
}
dmnsn_delete_array(tokens);
}
static const char *dmnsn_token_name(dmnsn_token_type token_type);
static void
dmnsn_print_token(FILE *file, dmnsn_token *token)
{
if (token->value) {
fprintf(file, "(%s \"%s\")", dmnsn_token_name(token->type), token->value);
} else {
fprintf(file, "%s", dmnsn_token_name(token->type));
}
}
void
dmnsn_print_token_sexpr(FILE *file, dmnsn_array *tokens)
{
unsigned int i;
if (dmnsn_array_size(tokens) == 0) {
fprintf(file, "()");
} else {
fprintf(file, "(");
dmnsn_print_token(file, dmnsn_array_at(tokens, 0));
for (i = 1; i < dmnsn_array_size(tokens); ++i) {
fprintf(file, " ");
dmnsn_print_token(file, dmnsn_array_at(tokens, i));
}
fprintf(file, ")");
}
fprintf(file, "\n");
}
static const char *
dmnsn_token_name(dmnsn_token_type token_type)
{
switch (token_type) {
case DMNSN_LBRACE:
return "DMNSN_LBRACE";
case DMNSN_RBRACE:
return "DMNSN_RBRACE";
default:
return "UNRECOGNIZED-TOKEN";
}
}
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