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/*
* Copyright (C) 2020 Jo-Philipp Wich <jo@mein.io>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <stdio.h>
#include <stdbool.h>
#include <stdint.h>
#include <unistd.h>
#include <errno.h>
#include <sys/stat.h>
#ifdef JSONC
#include <json.h>
#else
#include <json-c/json.h>
#endif
#include "lexer.h"
#include "parser.h"
#include "eval.h"
#include "lib.h"
static void
print_usage(char *app)
{
printf(
"== Usage ==\n\n"
" # %s [-d] {-i <file> | -s \"utpl script...\"}\n"
" -h, --help Print this help\n"
" -i file Specify an utpl script to parse\n"
" -s \"utpl script...\" Specify an utpl code fragment to parse\n"
" -d Instead of executing the script, dump the resulting AST as dot\n",
app);
}
#ifndef NDEBUG
static void dump(struct ut_state *s, uint32_t off, int level);
static void dump_node(struct ut_op *op) {
const char *p;
switch (op->type) {
case T_NUMBER:
printf("n%p [label=\"%"PRId64"\"];\n", op, json_object_get_int64(op->val));
break;
case T_DOUBLE:
printf("n%p [label=\"%f\"];\n", op, json_object_get_double(op->val));
break;
case T_BOOL:
printf("n%p [label=\"%s\"];\n", op, json_object_get_boolean(op->val) ? "true" : "false");
break;
case T_STRING:
case T_LABEL:
case T_TEXT:
printf("n%p [label=\"%s<", op, tokennames[op->type]);
for (p = json_object_get_string(op->val); *p; p++)
switch (*p) {
case '\n':
printf("\\\n");
break;
case '\t':
printf("\\\t");
break;
case '"':
printf("\\\"");
break;
default:
printf("%c", *p);
}
printf(">\"];\n");
break;
default:
printf("n%p [label=\"%s\"];\n", op, tokennames[op->type]);
}
}
static void dump(struct ut_state *s, uint32_t off, int level) {
struct ut_op *prev, *cur, *child;
int i;
if (level == 0) {
printf("digraph G {\nmain [shape=box];\n");
}
for (prev = NULL, cur = ut_get_op(s, off); cur; prev = cur, cur = ut_get_op(s, cur->tree.next)) {
dump_node(cur);
if (cur->type < __T_MAX) {
for (i = 0; i < ARRAY_SIZE(cur->tree.operand) && cur->tree.operand[i]; i++) {
child = ut_get_op(s, cur->tree.operand[i]);
if (cur->tree.operand[i]) {
dump(s, cur->tree.operand[i], level + 1);
printf("n%p -> n%p [label=\"op%d\"];\n", cur, child, i + 1);
}
}
}
if (prev)
printf("n%p -> n%p [style=dotted];\n", prev, cur);
}
if (level == 0) {
printf("main -> n%p [style=dotted];\n", ut_get_op(s, off));
printf("}\n");
}
}
#endif /* NDEBUG */
static enum ut_error_type
parse(const char *source, bool dumponly)
{
struct ut_state *state = calloc(1, sizeof(*state));
enum ut_error_type err;
char *msg;
err = ut_parse(state, source);
if (!err) {
if (dumponly) {
#ifdef NDEBUG
fprintf(stderr, "Debug support not compiled in\n");
err = UT_ERROR_EXCEPTION;
#else /* NDEBUG */
dump(state, state->main, 0);
#endif /* NDEBUG */
}
else {
err = ut_run(state);
}
}
if (err) {
msg = ut_format_error(state, source);
fprintf(stderr, "%s\n", msg);
free(msg);
}
ut_free(state);
return err;
}
int
main(int argc, char **argv)
{
size_t rlen, tlen = 0;
bool dumponly = false;
char buf[1024], *tmp;
char *source = NULL;
FILE *input = NULL;
int opt, rv = 0;
if (argc == 1)
{
print_usage(argv[0]);
goto out;
}
while ((opt = getopt(argc, argv, "dhi:s:")) != -1)
{
switch (opt) {
case 'h':
print_usage(argv[0]);
goto out;
case 'i':
input = strcmp(optarg, "-") ? fopen(optarg, "r") : stdin;
if (!input) {
fprintf(stderr, "Failed to open %s: %s\n", optarg, strerror(errno));
rv = UT_ERROR_EXCEPTION;
goto out;
}
break;
case 'd':
dumponly = true;
break;
case 's':
source = optarg;
break;
}
}
if (!source) {
while (1) {
rlen = fread(buf, 1, sizeof(buf), input);
if (rlen == 0)
break;
tmp = realloc(source, tlen + rlen + 1);
if (!tmp) {
tmp = ut_format_error(NULL, "");
fprintf(stderr, "%s\n", tmp);
free(tmp);
rv = UT_ERROR_OUT_OF_MEMORY;
goto out;
}
source = tmp;
memcpy(source + tlen, buf, rlen);
source[tlen + rlen] = 0;
tlen += rlen;
}
}
rv = parse(source, dumponly);
out:
if (input && input != stdin)
fclose(input);
return rv;
}
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