diff options
Diffstat (limited to 'gcc/java/jcf-reader.c')
| -rw-r--r-- | gcc/java/jcf-reader.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/gcc/java/jcf-reader.c b/gcc/java/jcf-reader.c index 878c4de..1b081e5 100644 --- a/gcc/java/jcf-reader.c +++ b/gcc/java/jcf-reader.c @@ -27,6 +27,8 @@ The Free Software Foundation is independent of Sun Microsystems, Inc. */ #include "zipfile.h" static int get_attribute PARAMS ((JCF *)); +static int peek_attribute PARAMS ((JCF *, int, const char *, int)); +static void skip_attribute PARAMS ((JCF *, int)); static int jcf_parse_preamble PARAMS ((JCF *)); static int jcf_parse_constant_pool PARAMS ((JCF *)); static void jcf_parse_class PARAMS ((JCF *)); @@ -35,6 +37,64 @@ static int jcf_parse_one_method PARAMS ((JCF *)); static int jcf_parse_methods PARAMS ((JCF *)); static int jcf_parse_final_attributes PARAMS ((JCF *)); +/* Go through all available attribute (ATTRIBUTE_NUMER) and try to + identify PEEKED_NAME. Return 1 if PEEKED_NAME was found, 0 + otherwise. JCF is restored to its initial position before + returning. */ + +static int +peek_attribute (jcf, attribute_number, peeked_name, peeked_name_length) + JCF *jcf; + int attribute_number; + const char *peeked_name; + int peeked_name_length; +{ + int to_return = 0; + long absolute_offset = (long)JCF_TELL (jcf); + int i; + + for (i = 0; !to_return && i < attribute_number; i++) + { + uint16 attribute_name = (JCF_FILL (jcf, 6), JCF_readu2 (jcf)); + uint32 attribute_length = JCF_readu4 (jcf); + int name_length; + const unsigned char *name_data; + + JCF_FILL (jcf, (long) attribute_length); + if (attribute_name <= 0 || attribute_name >= JPOOL_SIZE(jcf) + || JPOOL_TAG (jcf, attribute_name) != CONSTANT_Utf8) + continue; + + name_length = JPOOL_UTF_LENGTH (jcf, attribute_name); + name_data = JPOOL_UTF_DATA (jcf, attribute_name); + + if (name_length == peeked_name_length + && ! memcmp (name_data, peeked_name, peeked_name_length)) + { + to_return = 1; + break; + } + + JCF_SKIP (jcf, attribute_length); + } + + JCF_SEEK (jcf, absolute_offset); + return to_return; +} + +static void +skip_attribute (jcf, number_of_attribute) + JCF *jcf; + int number_of_attribute; +{ + while (number_of_attribute--) + { + JCF_FILL (jcf, 6); + (void) JCF_readu2 (jcf); + JCF_SKIP (jcf, JCF_readu4 (jcf)); + } +} + static int DEFUN(get_attribute, (jcf), JCF *jcf) |