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/*
* Sparse Ctags
*
* Ctags generates tags from preprocessing results.
*
* Copyright (C) 2006 Christopher Li
*
* Licensed under the Open Software License version 1.1
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include "parse.h"
#include "scope.h"
static struct symbol_list *taglist = NULL;
static void examine_symbol(struct symbol *sym);
#define MAX(_x,_y) ((_x) > (_y) ? (_x) : (_y))
static int cmp_sym(const void *m, const void *n)
{
const struct ident *a = ((const struct symbol *)m)->ident;
const struct ident *b = ((const struct symbol *)n)->ident;
int ret = strncmp(a->name, b->name, MAX(a->len, b->len));
if (!ret) {
const struct position a_pos = ((const struct symbol *)m)->pos;
const struct position b_pos = ((const struct symbol *)n)->pos;
ret = strcmp(stream_name(a_pos.stream),
stream_name(b_pos.stream));
if (!ret)
return a_pos.line < b_pos.line;
}
return ret;
}
static void show_tag_header(FILE *fp)
{
fprintf(fp, "!_TAG_FILE_FORMAT\t2\t/extended format; --format=1 will not append ;\" to lines/\n");
fprintf(fp, "!_TAG_FILE_SORTED\t0\t/0=unsorted, 1=sorted, 2=foldcase/\n");
fprintf(fp, "!_TAG_PROGRAM_AUTHOR\tChristopher Li\t/sparse@chrisli.org/\n");
fprintf(fp, "!_TAG_PROGRAM_NAME\tSparse Ctags\t//\n");
fprintf(fp, "!_TAG_PROGRAM_URL\thttp://www.kernel.org/pub/software/devel/sparse/\t/official site/\n");
fprintf(fp, "!_TAG_PROGRAM_VERSION\t0.01\t//\n");
}
static inline void show_symbol_tag(FILE *fp, struct symbol *sym)
{
fprintf(fp, "%s\t%s\t%d;\"\t%c\tfile:\n", show_ident(sym->ident),
stream_name(sym->pos.stream), sym->pos.line, (int)sym->kind);
}
static void show_tags(struct symbol_list *list)
{
struct symbol *sym;
struct ident *ident = NULL;
struct position pos = {};
static const char *filename;
FILE *fp;
if (!list)
return;
fp = fopen("tags", "w");
if (!fp) {
perror("open tags file");
return;
}
show_tag_header(fp);
FOR_EACH_PTR(list, sym) {
if (ident == sym->ident && pos.line == sym->pos.line &&
!strcmp(filename, stream_name(sym->pos.stream)))
continue;
show_symbol_tag(fp, sym);
ident = sym->ident;
pos = sym->pos;
filename = stream_name(sym->pos.stream);
} END_FOR_EACH_PTR(sym);
fclose(fp);
}
static inline void add_tag(struct symbol *sym)
{
if (sym->ident && !sym->visited) {
sym->visited = 1;
add_symbol(&taglist, sym);
}
}
static inline void examine_members(struct symbol_list *list)
{
struct symbol *sym;
FOR_EACH_PTR(list, sym) {
sym->kind = 'm';
examine_symbol(sym);
} END_FOR_EACH_PTR(sym);
}
static void examine_symbol(struct symbol *sym)
{
struct symbol *base = sym;
if (!sym || sym->visited)
return;
if (sym->ident && sym->ident->reserved)
return;
if (sym->type == SYM_KEYWORD || sym->type == SYM_PREPROCESSOR)
return;
add_tag(sym);
base = sym->ctype.base_type;
switch (sym->type) {
case SYM_NODE:
if (base->type == SYM_FN)
sym->kind = 'f';
examine_symbol(base);
break;
case SYM_STRUCT:
sym->kind = 's';
examine_members(sym->symbol_list);
break;
case SYM_UNION:
sym->kind = 'u';
examine_members(sym->symbol_list);
break;
case SYM_ENUM:
sym->kind = 'e';
case SYM_PTR:
case SYM_TYPEOF:
case SYM_BITFIELD:
case SYM_FN:
case SYM_ARRAY:
examine_symbol(sym->ctype.base_type);
break;
case SYM_BASETYPE:
break;
default:
die("unknown symbol %s namespace:%d type:%d\n", show_ident(sym->ident),
sym->namespace, sym->type);
}
if (!sym->kind)
sym->kind = 'v';
return;
}
static void examine_namespace(struct symbol *sym)
{
if (sym->visited)
return;
if (sym->ident && sym->ident->reserved)
return;
switch(sym->namespace) {
case NS_KEYWORD:
case NS_PREPROCESSOR:
return;
case NS_LABEL:
sym->kind = 'l';
break;
case NS_MACRO:
case NS_UNDEF:
sym->kind = 'd';
break;
case NS_TYPEDEF:
sym->kind = 't';
case NS_SYMBOL:
case NS_STRUCT:
examine_symbol(sym);
break;
default:
die("unknown namespace %d symbol:%s type:%d\n", sym->namespace,
show_ident(sym->ident), sym->type);
}
add_tag(sym);
}
static inline void examine_symbol_list(struct symbol_list *list)
{
struct symbol *sym;
if (!list)
return;
FOR_EACH_PTR(list, sym) {
examine_namespace(sym);
} END_FOR_EACH_PTR(sym);
}
int main(int argc, char **argv)
{
struct string_list *filelist = NULL;
char *file;
examine_symbol_list(sparse_initialize(argc, argv, &filelist));
FOR_EACH_PTR_NOTAG(filelist, file) {
sparse(file);
examine_symbol_list(file_scope->symbols);
} END_FOR_EACH_PTR_NOTAG(file);
examine_symbol_list(global_scope->symbols);
sort_list((struct ptr_list **)&taglist, cmp_sym);
show_tags(taglist);
return 0;
}
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