forked from osmocom/wireshark
154 lines
3.6 KiB
C
154 lines
3.6 KiB
C
/* make-taps.c
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* Tool to build the tap registration arrays.
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <glib.h>
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#define ARRAY_RESERVED_SIZE 128
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#define STRING_RESERVED_SIZE (8 * 1024)
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GRegex *taps_regex;
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static int
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compare_symbols(gconstpointer a, gconstpointer b)
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{
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return g_strcmp0(*(const char **)a, *(const char **)b);
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}
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static void
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scan_matches(GRegex *regex, const char *string, GPtrArray *dst)
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{
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GMatchInfo *match_info;
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char *match;
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g_regex_match(regex, string, G_REGEX_MATCH_NOTEMPTY, &match_info);
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while (g_match_info_matches(match_info)) {
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match = g_match_info_fetch(match_info, 1);
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g_ptr_array_add(dst, match);
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g_match_info_next(match_info, NULL);
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}
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g_match_info_free(match_info);
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}
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static void
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scan_file(const char *file, GPtrArray *taps)
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{
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char *contents;
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GError *err = NULL;
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if (!g_file_get_contents(file, &contents, NULL, &err)) {
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fprintf(stderr, "%s: %s\n", file, err->message);
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exit(1);
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}
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scan_matches(taps_regex, contents, taps);
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g_free(contents);
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}
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int main(int argc, char **argv)
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{
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GPtrArray *taps = NULL;
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GError *err = NULL;
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guint i;
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GString *s;
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const char *outfile;
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guint count_taps;
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if (argc < 3) {
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fprintf(stderr, "Usage: %s <outfile> <infiles...>\n", argv[0]);
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exit(1);
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}
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taps = g_ptr_array_new_full(ARRAY_RESERVED_SIZE, g_free);
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taps_regex = g_regex_new("void\\s+(register_tap_listener_[[:alnum:]_]+)\\s*\\(\\s*void\\s*\\)\\s*{",
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G_REGEX_OPTIMIZE, G_REGEX_MATCH_NOTEMPTY, &err);
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if (err) {
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fprintf(stderr, "GRegex: %s\n", err->message);
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exit(1);
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}
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outfile = argv[1];
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for (int arg = 2; arg < argc; arg++) {
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scan_file(argv[arg], taps);
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}
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if (taps->len == 0) {
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fprintf(stderr, "No tap registrations found.\n");
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exit(1);
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}
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g_ptr_array_sort(taps, compare_symbols);
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s = g_string_sized_new(STRING_RESERVED_SIZE);
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g_string_append(s,
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"/*\n"
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" * Do not modify this file. Changes will be overwritten.\n"
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" *\n"
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" * Generated automatically using \"make-taps\".\n"
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" */\n"
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"\n"
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"#include \"ui/taps.h\"\n"
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"\n");
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g_string_append_printf(s,
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"const gulong tap_reg_listener_count = %d;\n"
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"\n",
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taps->len);
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for (i = 0; i < taps->len; i++) {
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g_string_append_printf(s,
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"void %s(void);\n",
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(char *)taps->pdata[i]);
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}
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g_string_append(s,
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"\n"
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"tap_reg_t tap_reg_listener[] = {\n");
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for (i = 0; i < taps->len; i++) {
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g_string_append_printf(s,
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" { \"%s\", %s },\n",
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(char *)taps->pdata[i], (char *)taps->pdata[i]);
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}
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g_string_append(s,
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" { NULL, NULL }\n"
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"};\n"
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"\n");
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if (!g_file_set_contents(outfile, s->str, s->len, &err)) {
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fprintf(stderr, "%s: %s\n", outfile, err->message);
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exit(1);
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}
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count_taps = taps->len;
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g_string_free(s, TRUE);
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g_regex_unref(taps_regex);
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g_ptr_array_free(taps, TRUE);
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printf("Found %u registrations.\n", count_taps);
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}
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/*
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* Editor modelines
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*
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* Local Variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* ex: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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