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geekcode.c
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geekcode.c
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/*
* Geek Code Generator v2
* Copyright (C) 1999-2003 Chris Gushue <chris@blackplasma.net>
* Copyright (C) 2007 Charlie Shepherd <masterdriverz@gentoo.org>
* License: GPL2
*/
#include <errno.h>
#include <ctype.h>
#include <getopt.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <stdarg.h>
#include "getanswer.h"
#include "debug.h"
#include "lines.h"
#include "parse.h"
#include "geekcode.h"
static void output_answers(FILE *out);
static void file_error(const char *filename, const char *action)
{
char error[256];
snprintf(error, sizeof(error), "Error while %s file \"%s\"",
action, filename);
perror(error);
exit(1);
}
/*
* Wrapper around getcontent, exiting on failure and printing a useful
* message. If format is non-NULL, uses printf format semantics.
*/
_printf(2, 3)
static const struct elem *xgetcontent(const struct answer *obj,
const char *format, ...)
{
const struct elem *content;
va_list ap;
va_start(ap, format);
content = getcontent(obj);
if (!content) {
if (format)
vfprintf(stderr, format, ap);
else
fputs("Error getting content\n", stderr);
print_answer_struct(obj);
exit(1);
}
return content;
}
static void run_code(const char *filename, FILE *in)
{
unsigned ret, line_count;
ret = read_code(in, &line_count);
if (ret) {
fprintf(stderr, "Error '%s' in file %s, line %u\n", parse_errors[ret], filename, line_count);
exit(1);
}
output_answers(stdout);
}
/* Loop over lines, reading in answers from stdin */
static void create_code(void)
{
struct answer **cur_line;
int page_num=1;
for (cur_line = lines; *cur_line; cur_line++) {
struct answer *cur_question;
for (cur_question = *cur_line;
cur_question->answer;
cur_question++, page_num++) {
const char *aux_string=NULL;
if (cur_question->dependant) {
const struct elem *aux = xgetcontent(cur_question-1,
"function: %s; line %d\n", __func__, __LINE__);
aux_string = aux->alias;
}
cur_question->answer =
getanswer(cur_question->name, page_num,
cur_question->contents, aux_string);
}
}
}
/* Outputs the geekcode stored in lines to out */
static void output_code(FILE *out)
{
struct answer **cur_line;
fputs("-----BEGIN GEEK CODE BLOCK-----\n", out);
fputs("Version: 3.12\n", out);
for (cur_line = lines; *cur_line; cur_line++) {
const struct answer *cur_question;
for (cur_question = *cur_line;
cur_question->answer;
cur_question++) {
const struct elem *content;
if (!cur_question->display)
continue;
content = xgetcontent(cur_question,
"\nThere was an error getting an alias (%s)\n",
cur_question->name);
if (cur_question->dependant) {
const struct elem *aux =
xgetcontent(cur_question-1, "There was an error getting content\n");
fprintf(out, content->alias, *aux->alias);
} else {
fputs(content->alias, out);
}
putc(' ', out);
}
putc('\n', out);
}
fputs("------END GEEK CODE BLOCK------\n", out);
}
static void output_answers(FILE *out)
{
struct answer **cur_line;
for (cur_line = lines; *cur_line; cur_line++) {
struct answer *cur_question;
for (cur_question = *cur_line; cur_question->answer; cur_question++) {
const struct elem *content =
xgetcontent(cur_question, "There was an error getting an answer\n");
fprintf(out, "%s: %s\n",
cur_question->name, content->comment);
}
}
}
static void list_sections(void)
{
struct answer **cur_line;
for (cur_line = lines; *cur_line; cur_line++) {
struct answer *cur_question;
for (cur_question = *cur_line; cur_question->answer; cur_question++)
puts(cur_question->name);
}
}
static const char usage_str[] = "\
./geekcode [ --list || --read || --write [ --output=file ] || --version ] <file>\n\
" VERSIONSTR "\n\n\
--list\n\
List the sections in geekcode.\n\
--read\n\
Translate a geekcode file (reads from stdin if no files given).\n\
--write\n\
Interactively input a geekcode (default).\n\
--output <file>\n\
(Only applicable with --write.)\n\
Write the final geekcode to file (but still write the questions to stdout).\n\
";
static const char version_str[] = VERSIONSTR;
static inline void usage(FILE *out)
{
fputs(usage_str, out);
}
static inline void version(void)
{
puts(version_str);
}
/*
* Opens filename with mode mode, checking it's a regular file if it's being
* opened for reading and checking the open succeeds. If either of these fails
* it exit(1)'s, never returning NULL.
*/
static FILE *open_file(const char *filename, const char *mode)
{
FILE *f;
/* Check filename is the type of file we want */
if (mode[0] == 'r') {
struct stat fileinfo;
if (stat(filename, &fileinfo) == -1)
file_error(filename, "checking");
if (!S_ISREG(fileinfo.st_mode)) {
fprintf(stderr, "Error, file \"%s\" isn't a regular file\n",
filename);
exit(1);
}
}
f = fopen(filename, mode);
if (!f)
file_error(filename, "opening");
return f;
}
int main(int argc, char **argv)
{
char *outfile=NULL;
int read=0, write=0, output=0, list=0, c, index;
const struct option long_options[] = {
{"list", no_argument, NULL, 'l'},
{"read", no_argument, NULL, 'r'},
{"write", no_argument, NULL, 'w'},
{"output", required_argument, NULL, 'o'},
{"help", no_argument, NULL, 'h'},
{"version", no_argument, NULL, 'v'},
{NULL, 0, NULL, 0}
};
while ((c = getopt_long(argc, argv, "lrwho:", long_options, &index)) != -1) {
switch (c) {
case 'l':
list = 1;
break;
case 'r':
read = 1;
break;
case 'w':
write = 1;
break;
case 'h':
usage(stdout);
return 0;
case 'o':
output = 1;
outfile = optarg;
break;
case 'v':
version();
return 0;
default:
usage(stderr);
return -1;
}
}
if (write+read+list > 1) {
fputs("Conflicting actions given simultaneously.\n", stderr);
usage(stderr);
return -1;
} else if (!write+read+list) {
write = 1;
}
if (output && !write) {
fputs("It only makes sense to use --output with --write.\n", stderr);
usage(stderr);
return 1;
}
if (list) {
list_sections();
} else if (read) {
FILE *f=NULL;
for (index = optind; index < argc; index++) {
f = open_file(argv[index], "r");
run_code(argv[index], f);
if (fclose(f))
file_error(argv[index], "closing");
}
/* If we haven't opened anything, use stdin */
if (!f)
run_code("stdin", stdin);
} else {
FILE *f;
if (outfile)
f = open_file(outfile, "w");
else
f = stdout;
if (optind < argc) {
fputs("--write takes no arguments\n", stderr);
usage(stderr);
return -1;
}
create_code();
output_code(f);
}
return 0;
}