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TAGS parser full reworked, add hungry search algorithm, change etags hash struct

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This commit is contained in:
Ilia Maslakov 2009-03-04 19:04:05 +00:00 committed by Slava Zanko
parent 8abf76df7c
commit 2a038f109a
2 changed files with 101 additions and 48 deletions
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142
edit/etags.c
View File

@ -1,9 +1,9 @@
/* editor C-code navigation via tags.
make TAGS file via command:
$ find . -type f -name "*.[ch]" | etags -l c --declarations -
$ find . -type f -name "*.[ch]" | etags -l c --declarations -
or, if etags utility not installed:
$ ctags --languages=c -e -R -h '[ch]'
$ find . -type f -name "*.[ch]" | ctags -R --c-kinds=+p --fields=+iaS --extra=+q -e -L-
Copyright (C) 2009 Free Software Foundation, Inc.
@ -42,53 +42,98 @@
#include "../src/global.h"
#include "../edit/etags.h"
/*** global variables **************************************************/
/*** file scope macro definitions **************************************/
/*** file scope type declarations **************************************/
/*** file scope variables **********************************************/
/*** file scope functions **********************************************/
static long etags_get_pos_from(char *str)
int parse_define(char *buf, char **long_name, char **short_name, long *line)
{
static char buf[16];
int i, j;
j = 0;
int len = strlen( str );
for ( i = 0; i < len && i < 16; i++ ) {
char c = (char) str[i];
if ( isdigit (c) ) {
buf[j++] = c;
buf[j] = '\0';
} else {
return atol((char *)buf);
enum {in_longname, in_shortname, in_line, finish} def_state = in_longname;
static char longdef[LONG_DEF_LEN];
static char shortdef[SHORT_DEF_LEN];
static char linedef[LINE_DEF_LEN];
int nlong = 0;
int nshort = 0;
int nline = 0;
char c = *buf;
while ( !(c =='\0' || c =='\n') ) {
switch ( def_state ) {
case in_longname:
if ( c == 0x01 ) {
def_state = in_line;
} else if ( c == 0x7F ) {
def_state = in_shortname;
} else {
if ( nlong < LONG_DEF_LEN - 1 ) {
longdef[nlong++] = c;
}
}
break;
case in_shortname:
if ( isdigit(c) ) {
nshort = 0;
buf--;
def_state = in_line;
} else if ( c == 0x01 ) {
def_state = in_line;
} else {
if ( nshort < SHORT_DEF_LEN - 1 ) {
shortdef[nshort++] = c;
}
}
break;
case in_line:
if ( c == ',' ) {
def_state = finish;
} else if ( isdigit(c) ) {
if ( nline < LINE_DEF_LEN - 1 ) {
linedef[nline++] = c;
}
}
break;
case finish:
longdef[nlong] = '\0';
shortdef[nshort] = '\0';
linedef[nline] = '\0';
*long_name = g_strdup (longdef);
*short_name = g_strdup (shortdef);
*line = atol (linedef);
return 1;
break;
}
buf++;
c = *buf;
}
*long_name = NULL;
*short_name = NULL;
*line = 0;
return 0;
}
/*** public functions **************************************************/
int etags_set_def_hash(char *tagfile, char *start_path, char *match_func, struct def_hash_type *def_hash, int *num)
int etags_set_definition_hash(const char *tagfile, const char *start_path,
const char *match_func,
struct etags_hash_type *def_hash,
int *num)
{
FILE *f;
static char buf[4048];
int len;
static char buf[1024];
char *longname = NULL;
char *shortname = NULL;
long line;
char *chekedstr = NULL;
/* open file with positions */
f = fopen (tagfile, "r");
int i;
if (!f)
return 1;
len = strlen( match_func );
int pos;
int pos;
char *fullpath = NULL;
char *filename = NULL;
long line;
enum {start, in_filename, in_define} state = start;
while (fgets (buf, sizeof (buf), f)) {
@ -102,8 +147,8 @@ int etags_set_def_hash(char *tagfile, char *start_path, char *match_func, struct
case in_filename:
pos = strcspn(buf, ",");
g_free(filename);
filename = malloc(pos + 2);
g_strlcpy ( filename, (char *)buf, pos + 1 );
filename = malloc (pos + 2);
g_strlcpy(filename, (char *)buf, pos + 1);
state = in_define;
break;
case in_define:
@ -112,22 +157,25 @@ int etags_set_def_hash(char *tagfile, char *start_path, char *match_func, struct
break;
}
/* check if the filename matches the define pos */
if ( strstr ( buf, match_func ) ) {
int l = (int)strlen( buf );
for ( i = 0; i < l; i++) {
if ( ( buf[i] == 0x7F || buf[i] == 0x01 ) && isdigit(buf[i+1]) ) {
line = etags_get_pos_from(&buf[i+1]);
state = start;
if ( *num < MAX_DEFINITIONS ) {
def_hash[*num].filename_len = strlen(filename);
fullpath = g_strdup_printf("%s/%s",start_path, filename);
canonicalize_pathname (fullpath);
def_hash[*num].filename = g_strdup(fullpath);
g_free(fullpath);
def_hash[*num].line = line;
(*num)++;
}
chekedstr = strstr (buf, match_func);
if ( chekedstr ) {
parse_define (chekedstr, &longname, &shortname, &line);
if ( *num < MAX_DEFINITIONS - 1 ) {
def_hash[*num].filename_len = strlen (filename);
fullpath = g_strdup_printf("%s/%s",start_path, filename);
canonicalize_pathname (fullpath);
def_hash[*num].fullpath = g_strdup(fullpath);
g_free (fullpath);
def_hash[*num].filename = g_strdup (filename);
if ( shortname ) {
def_hash[*num].short_define = g_strdup (shortname);
} else {
def_hash[*num].short_define = g_strdup (longname);
}
def_hash[*num].line = line;
g_free(shortname);
g_free(longname);
(*num)++;
}
}
break;

7
edit/etags.h
View File

@ -2,10 +2,15 @@
#define MC_EDIT_ETAGS_H 1
#define MAX_DEFINITIONS 50
#define SHORT_DEF_LEN 30
#define LONG_DEF_LEN 40
#define LINE_DEF_LEN 16
struct def_hash_type {
struct etags_hash_type {
int filename_len;
unsigned char *fullpath;
unsigned char *filename;
unsigned char *short_define;
long line;
};