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/*
* UNG's Not GNU
*
* Copyright (c) 2011-2017, Jakob Kaivo <jkk@ung.org>
*
* 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.
*
*/
#define _XOPEN_SOURCE 700
#include <errno.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <search.h>
#include <unistd.h>
struct tag {
const char *id;
const char *file;
char *text;
int line;
};
void *tagroot = NULL;
FILE *output = NULL;
static int compar(const void *l, const void *r)
{
const struct tag *left = l;
const struct tag *right = r;
return strcoll(left->id, right->id);
}
void addtag(const char *id, const char *file, char *text, int line)
{
struct tag *t = calloc(1, sizeof(*t));
if (t == NULL) {
fprintf(stderr, "ctags: Out of memory\n");
exit(1);
}
t->id = strdup(id);
t->text = strdup(text);
t->line = line;
t->file = strdup(file);
tsearch(t, &tagroot, compar);
}
static void checkcline(char *text, int line, const char *path)
{
//static int comment = 0;
static int bracket = 0;
if (line == 1) {
//comment = 0;
bracket = 0;
}
if (strstr(text, "#define ")) {
addtag("define", path, text, line);
} else if (strstr(text, "typedef")) {
addtag("typedef", path, text, line);
} else if (bracket == 0) {
addtag("identifier", path, text, line);
}
}
static void checkfline(char *text, int line, const char *path)
{
if (strstr(text, "FUNCTION")) {
addtag("FUNCTION", path, text, line);
}
}
static int addtags(const char *path)
{
char *extension = strrchr(path, '.');
enum { UNKNOWN, C, FORTRAN } filetype = UNKNOWN;
if (extension == NULL) {
fprintf(stderr, "ctags: Don't know how to process files without an extension (%s)\n", path);
return 1;
}
if (!strcmp(extension, ".c") || !strcmp(extension, ".h")) {
filetype = C;
} else if (!strcmp(extension, ".f")) {
filetype = FORTRAN;
} else {
fprintf(stderr, "ctags: Don't know how to process files with extension '%s'\n", extension);
return 1;
}
FILE *f = fopen(path, "r");
if (f == NULL) {
fprintf(stderr, "ctags: Couldn't open %s: %s\n", path, strerror(errno));
return 1;
}
int lineno = 0;
while (!feof(f)) {
char *line = NULL;
size_t n = 0;
getline(&line, &n, f);
line[strlen(line)-1] = '\0';
lineno++;
if (filetype == FORTRAN) {
checkfline(line, lineno, path);
} else {
checkcline(line, lineno, path);
}
free(line);
}
fclose(f);
return 0;
}
static void writefile(const void *t, VISIT v, int level)
{
(void)level;
if (v != postorder && v != leaf) {
return;
}
const struct tag *tag = *(const struct tag **)t;
char *pattern = tag->text;
fprintf(output, "%s\t%s\t/^%s$/\n", tag->id, tag->file, pattern);
}
static void writex(const void *t, VISIT v, int level)
{
(void)level;
if (v != postorder && v != leaf) {
return;
}
const struct tag *tag = *(const struct tag **)t;
printf("%s %d %s %s\n", tag->id, tag->line, tag->file, tag->text);
}
int main(int argc, char *argv[])
{
setlocale(LC_ALL, "");
char *tagsfile = "tags";
int append = 0;
int c;
while ((c = getopt(argc, argv, "af:x")) != -1) {
switch (c) {
case 'a': /** append to /tagsfile/ **/
append = 1;
break;
case 'f': /** write to /tagsfile/ instead of "tags" **/
tagsfile = optarg;
break;
case 'x': /** write to stdout **/
tagsfile = NULL;
break;
default:
return 1;
}
}
if (optind >= argc) {
fprintf(stderr, "ctags: At least one file must be specified\n");
return 1;
}
if (tagsfile) {
output = fopen(tagsfile, append ? "a" : "w");
if (output == NULL) {
fprintf(stderr, "ctags: Couldn't open %s: %s\n", tagsfile, strerror(errno));
return 1;
}
setlocale(LC_COLLATE, "POSIX");
}
int r = 0;
while (optind < argc) {
r |= addtags(argv[optind++]);
}
twalk(tagroot, tagsfile ? writefile : writex);
return r;
}
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