#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <assert.h>
#include <stdlib.h>
#include <errno.h>
#include "lib.h"
#include "errarg.h"
#include "error.h"
#include "stringclass.h"
static int include_list_length;
static char **include_list;
int compatible_flag = 0;
extern int interpret_lf_args(const char *);
int do_file(const char *filename);
static void
include_path_append(char *path)
{
++include_list_length;
size_t nbytes = include_list_length * sizeof(include_list[0]);
include_list = (char **)realloc((void *)include_list, nbytes);
include_list[include_list_length - 1] = path;
}
void usage()
{
fprintf(stderr, "usage: %s [ -vC ] [ -I file ] [ files ]\n", program_name);
exit(1);
}
int main(int argc, char **argv)
{
program_name = argv[0];
include_path_append(".");
int opt;
while ((opt = getopt(argc, argv, "CI:v")) != EOF)
switch (opt) {
case 'v':
{
extern const char *version_string;
fprintf(stderr, "GNU soelim version %s\n", version_string);
fflush(stderr);
break;
}
case 'C':
compatible_flag = 1;
break;
case 'I':
include_path_append(optarg);
break;
case '?':
usage();
break;
default:
assert(0);
}
int nbad = 0;
if (optind >= argc)
nbad += !do_file("-");
else
for (int i = optind; i < argc; i++)
nbad += !do_file(argv[i]);
if (ferror(stdout) || fflush(stdout) < 0)
fatal("output error");
return nbad != 0;
}
void set_location()
{
printf(".lf %d %s\n", current_lineno, current_filename);
}
void do_so(const char *line)
{
const char *p = line;
while (*p == ' ')
p++;
string filename;
int success = 1;
for (const char *q = p;
success && *q != '\0' && *q != '\n' && *q != ' ';
q++)
if (*q == '\\') {
switch (*++q) {
case 'e':
case '\\':
filename += '\\';
break;
case ' ':
filename += ' ';
break;
default:
success = 0;
break;
}
}
else
filename += char(*q);
if (success && filename.length() > 0) {
filename += '\0';
const char *fn = current_filename;
int ln = current_lineno;
current_lineno--;
if (do_file(filename.contents())) {
current_filename = fn;
current_lineno = ln;
set_location();
return;
}
current_lineno++;
}
fputs(".so", stdout);
fputs(line, stdout);
}
int do_file(const char *filename)
{
FILE *fp;
string whole_filename;
if (strcmp(filename, "-") == 0) {
fp = stdin;
whole_filename = filename;
whole_filename += '\0';
}
else if (filename[0] == '/') {
whole_filename = filename;
whole_filename += '\0';
errno = 0;
fp = fopen(filename, "r");
if (fp == 0) {
error("can't open `%1': %2", filename, strerror(errno));
return 0;
}
}
else {
size_t j;
for (j = 0; j < include_list_length; ++j)
{
char *path = include_list[j];
if (0 == strcmp(path, "."))
whole_filename = filename;
else
whole_filename = string(path) + "/" + filename;
whole_filename += '\0';
errno = 0;
fp = fopen(whole_filename.contents(), "r");
if (fp != 0)
break;
if (errno != ENOENT) {
error("can't open `%1': %2",
whole_filename.contents(), strerror(errno));
return 0;
}
}
if (j >= include_list_length)
{
errno = ENOENT;
error("can't open `%1': %2", filename, strerror(errno));
return 0;
}
}
current_filename = whole_filename.contents();
current_lineno = 1;
set_location();
enum { START, MIDDLE, HAD_DOT, HAD_s, HAD_so, HAD_l, HAD_lf } state = START;
for (;;) {
int c = getc(fp);
if (c == EOF)
break;
switch (state) {
case START:
if (c == '.')
state = HAD_DOT;
else {
putchar(c);
if (c == '\n') {
current_lineno++;
state = START;
}
else
state = MIDDLE;
}
break;
case MIDDLE:
putchar(c);
if (c == '\n') {
current_lineno++;
state = START;
}
break;
case HAD_DOT:
if (c == 's')
state = HAD_s;
else if (c == 'l')
state = HAD_l;
else {
putchar('.');
putchar(c);
if (c == '\n') {
current_lineno++;
state = START;
}
else
state = MIDDLE;
}
break;
case HAD_s:
if (c == 'o')
state = HAD_so;
else {
putchar('.');
putchar('s');
putchar(c);
if (c == '\n') {
current_lineno++;
state = START;
}
else
state = MIDDLE;
}
break;
case HAD_so:
if (c == ' ' || c == '\n' || compatible_flag) {
string line;
for (; c != EOF && c != '\n'; c = getc(fp))
line += c;
current_lineno++;
line += '\n';
line += '\0';
do_so(line.contents());
state = START;
}
else {
fputs(".so", stdout);
putchar(c);
state = MIDDLE;
}
break;
case HAD_l:
if (c == 'f')
state = HAD_lf;
else {
putchar('.');
putchar('l');
putchar(c);
if (c == '\n') {
current_lineno++;
state = START;
}
else
state = MIDDLE;
}
break;
case HAD_lf:
if (c == ' ' || c == '\n' || compatible_flag) {
string line;
for (; c != EOF && c != '\n'; c = getc(fp))
line += c;
current_lineno++;
line += '\n';
line += '\0';
interpret_lf_args(line.contents());
printf(".lf%s", line.contents());
state = START;
}
else {
fputs(".lf", stdout);
putchar(c);
state = MIDDLE;
}
break;
default:
assert(0);
}
}
switch (state) {
case HAD_DOT:
fputs(".\n", stdout);
break;
case HAD_l:
fputs(".l\n", stdout);
break;
case HAD_s:
fputs(".s\n", stdout);
break;
case HAD_lf:
fputs(".lf\n", stdout);
break;
case HAD_so:
fputs(".so\n", stdout);
break;
case MIDDLE:
putc('\n', stdout);
break;
case START:
break;
}
if (fp != stdin)
fclose(fp);
current_filename = 0;
return 1;
}