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/*
* Copyright (C) 2006-2007 Michael Buesch <mb@bu3sch.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program 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.
*/
#include "args.h"
#include "main.h"
#include "util.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
int _debug;
struct cmdline_args cmdargs = {
.arch = 5, /* Default to v5 architecture. */
.no_header = 0, /* Input file does not have a header. */
.print_addresses = 0, /* Print the code addresses in the output. */
};
#define ARG_MATCH 0
#define ARG_NOMATCH 1
#define ARG_ERROR -1
static int do_cmp_arg(char **argv, int *pos,
const char *template,
int allow_merged,
char **param)
{
char *arg;
char *next_arg;
size_t arg_len, template_len;
arg = argv[*pos];
next_arg = argv[*pos + 1];
arg_len = strlen(arg);
template_len = strlen(template);
if (param) {
/* Maybe we have a merged parameter here.
* A merged parameter is "-pfoobar" for example.
*/
if (allow_merged && arg_len > template_len) {
if (memcmp(arg, template, template_len) == 0) {
*param = arg + template_len;
return ARG_MATCH;
}
return ARG_NOMATCH;
} else if (arg_len != template_len)
return ARG_NOMATCH;
*param = next_arg;
}
if (strcmp(arg, template) == 0) {
if (param) {
/* Skip the parameter on the next iteration. */
(*pos)++;
if (*param == NULL) {
fprintf(stderr, "%s needs a parameter\n", arg);
return ARG_ERROR;
}
}
return ARG_MATCH;
}
return ARG_NOMATCH;
}
/* Simple and lean command line argument parsing. */
static int cmp_arg(char **argv, int *pos,
const char *long_template,
const char *short_template,
char **param)
{
int err;
if (long_template) {
err = do_cmp_arg(argv, pos, long_template, 0, param);
if (err == ARG_MATCH || err == ARG_ERROR)
return err;
}
err = ARG_NOMATCH;
if (short_template)
err = do_cmp_arg(argv, pos, short_template, 1, param);
return err;
}
static void usage(int argc, char **argv)
{
fprintf(stderr, "Usage: %s INPUT_FILE OUTPUT_FILE [OPTIONS]\n", argv[0]);
fprintf(stderr, " -a|--arch ARCH The architecture type of the input file\n");
fprintf(stderr, " -h|--help Print this help\n");
fprintf(stderr, " --nohdr The input file does not have a header\n");
fprintf(stderr, " --paddr Print the code addresses\n");
fprintf(stderr, " -d|--debug Print verbose debugging info\n");
fprintf(stderr, " Repeat for more verbose debugging\n");
}
int parse_args(int argc, char **argv)
{
int i;
int res;
char *param;
infile_name = NULL;
outfile_name = NULL;
for (i = 1; i < argc; i++) {
if ((res = cmp_arg(argv, &i, "--help", "-h", NULL)) == ARG_MATCH) {
usage(argc, argv);
return 1;
} else if ((res = cmp_arg(argv, &i, "--nohdr", NULL, NULL)) == ARG_MATCH) {
cmdargs.no_header = 1;
} else if ((res = cmp_arg(argv, &i, "--paddr", NULL, NULL)) == ARG_MATCH) {
cmdargs.print_addresses = 1;
} else if ((res = cmp_arg(argv, &i, "--debug", "-d", NULL)) == ARG_MATCH) {
_debug++;
} else if ((res = cmp_arg(argv, &i, "--arch", "-a", ¶m)) == ARG_MATCH) {
unsigned long arch;
char *tail;
arch = strtol(param, &tail, 0);
if (strlen(tail) || (arch != 5)) {
fprintf(stderr, "Unsupported architecture \"%s\"\n",
param);
return -1;
}
cmdargs.arch = arch;
} else {
if (!infile_name) {
infile_name = argv[i];
continue;
}
if (!outfile_name) {
outfile_name = argv[i];
continue;
}
fprintf(stderr, "Unrecognized argument: %s\n", argv[i]);
goto out_usage;
}
}
if (!infile_name || !outfile_name)
goto out_usage;
return 0;
out_usage:
usage(argc, argv);
return -1;
}
int open_input_file(void)
{
if (strcmp(infile_name, "-") == 0) {
infile = stdin;
} else {
infile = fopen(infile_name, "r");
if (!infile) {
fprintf(stderr, "Could not open INPUT_FILE %s\n",
infile_name);
return -1;
}
}
return 0;
}
void close_input_file(void)
{
if (strcmp(infile_name, "-") != 0)
fclose(infile);
}
int open_output_file(void)
{
if (strcmp(outfile_name, "-") == 0) {
outfile = stdout;
} else {
outfile = fopen(outfile_name, "w+");
if (!outfile) {
fprintf(stderr, "Could not open OUTPUT_FILE %s\n",
outfile_name);
return -1;
}
}
return 0;
}
void close_output_file(void)
{
if (strcmp(outfile_name, "-") != 0)
fclose(outfile);
}
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