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Diffstat (limited to 'epan/ftypes/ftype-pcre.c')
| -rw-r--r-- | epan/ftypes/ftype-pcre.c | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/epan/ftypes/ftype-pcre.c b/epan/ftypes/ftype-pcre.c deleted file mode 100644 index 854d957ee4..0000000000 --- a/epan/ftypes/ftype-pcre.c +++ /dev/null @@ -1,164 +0,0 @@ -/* - * Wireshark - Network traffic analyzer - * By Gerald Combs <gerald@wireshark.org> - * Copyright 2001 Gerald Combs - * - * SPDX-License-Identifier: GPL-2.0-or-later - */ - -/* Perl-Compatible Regular Expression (PCRE) internal field type. - * Used with the "matches" dfilter operator, allowing efficient - * compilation and studying of a PCRE pattern in dfilters. - */ - -#include "config.h" - -#include <ftypes-int.h> - -#include <glib.h> -#include <string.h> - -static void -gregex_fvalue_new(fvalue_t *fv) -{ - fv->value.re = NULL; -} - -static void -gregex_fvalue_free(fvalue_t *fv) -{ - if (fv->value.re) { - g_regex_unref(fv->value.re); - fv->value.re = NULL; - } -} - -/* Generate a FT_PCRE from a parsed string pattern. - * On failure, if err_msg is non-null, set *err_msg to point to a - * g_malloc()ed error message. */ -static gboolean -val_from_string(fvalue_t *fv, const char *pattern, gchar **err_msg) -{ - GError *regex_error = NULL; - GRegexCompileFlags cflags = (GRegexCompileFlags)(G_REGEX_CASELESS | G_REGEX_OPTIMIZE); - - /* - * As FT_BYTES and FT_PROTOCOL contain arbitrary binary data and FT_STRING - * is not guaranteed to contain valid UTF-8, we have to disable support for - * UTF-8 patterns and treat every pattern and subject as raw bytes. - * - * Should support for UTF-8 patterns be necessary, then we should compile a - * pattern without G_REGEX_RAW. Additionally, we MUST use g_utf8_validate() - * before calling g_regex_match_full() or risk crashes. - */ - cflags = (GRegexCompileFlags)(cflags | G_REGEX_RAW); - - /* Free up the old value, if we have one */ - gregex_fvalue_free(fv); - - fv->value.re = g_regex_new( - pattern, /* pattern */ - cflags, /* Compile options */ - (GRegexMatchFlags)0, /* Match options */ - ®ex_error /* Compile / study errors */ - ); - - if (regex_error) { - if (err_msg) { - *err_msg = g_strdup(regex_error->message); - } - g_error_free(regex_error); - if (fv->value.re) { - g_regex_unref(fv->value.re); - } - return FALSE; - } - return TRUE; -} - -/* Generate a FT_PCRE from an unparsed string pattern. - * On failure, if err_msg is non-null, set *err_msg to point to a - * g_malloc()ed error message. */ -static gboolean -val_from_unparsed(fvalue_t *fv, const char *pattern, gboolean allow_partial_value, gchar **err_msg) -{ - g_assert(! allow_partial_value); - - return val_from_string(fv, pattern, err_msg); -} - -static int -gregex_repr_len(fvalue_t *fv, ftrepr_t rtype _U_, int field_display _U_) -{ - return (int)strlen(g_regex_get_pattern(fv->value.re)); -} - -static void -gregex_to_repr(fvalue_t *fv, ftrepr_t rtype _U_, int field_display _U_, char *buf, unsigned int size) -{ - g_strlcpy(buf, g_regex_get_pattern(fv->value.re), size); -} - -/* BEHOLD - value contains the string representation of the regular expression, - * and we want to store the compiled PCRE RE object into the value. */ -static void -gregex_fvalue_set(fvalue_t *fv, const char *value) -{ - g_assert(value != NULL); - /* Free up the old value, if we have one */ - gregex_fvalue_free(fv); - val_from_unparsed(fv, value, FALSE, NULL); -} - -static gpointer -gregex_fvalue_get(fvalue_t *fv) -{ - return fv->value.re; -} - -void -ftype_register_pcre(void) -{ - static ftype_t pcre_type = { - FT_PCRE, /* ftype */ - "FT_PCRE", /* name */ - "Compiled Perl-Compatible Regular Expression (GRegex) object", /* pretty_name */ - 0, /* wire_size */ - gregex_fvalue_new, /* new_value */ - gregex_fvalue_free, /* free_value */ - val_from_unparsed, /* val_from_unparsed */ - val_from_string, /* val_from_string */ - gregex_to_repr, /* val_to_string_repr */ - gregex_repr_len, /* len_string_repr */ - - { .set_value_string = gregex_fvalue_set }, /* union set_value */ - { .get_value_ptr = gregex_fvalue_get }, /* union get_value */ - - NULL, /* cmp_eq */ - NULL, /* cmp_ne */ - NULL, /* cmp_gt */ - NULL, /* cmp_ge */ - NULL, /* cmp_lt */ - NULL, /* cmp_le */ - NULL, /* cmp_bitwise_and */ - NULL, /* cmp_contains */ - NULL, /* cmp_matches */ - - NULL, /* len */ - NULL, /* slice */ - }; - ftype_register(FT_PCRE, &pcre_type); -} - -/* - * Editor modelines - https://www.wireshark.org/tools/modelines.html - * - * Local variables: - * c-basic-offset: 4 - * tab-width: 8 - * indent-tabs-mode: nil - * End: - * - * vi: set shiftwidth=4 tabstop=8 expandtab: - * :indentSize=4:tabSize=8:noTabs=true: - */ |