gcc/java/jcf.h

   1 /* Utility macros to read Java(TM) .class files and byte codes.
   2
   3    Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 2, or (at your option)
   8 any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with GNU CC; see the file COPYING.  If not, write to
  17 the Free Software Foundation, 59 Temple Place - Suite 330,
  18 Boston, MA 02111-1307, USA.
  19
  20 Java and all Java-based marks are trademarks or registered trademarks
  21 of Sun Microsystems, Inc. in the United States and other countries.
  22 The Free Software Foundation is independent of Sun Microsystems, Inc.  */
  23
  24 /* Written by Per Bothner <bothner@cygnus.com>, February 1996. */
  25
  26 #ifndef JCF_H
  27 #define JCF_H
  28 #include "javaop.h"
  29 #ifndef DEFUN
  30 #if defined (__STDC__)
  31 #define AND             ,
  32 #define PTR             void *
  33 #define DEFUN(name, arglist, args)      name(args)
  34 #else
  35 #define PTR             char *
  36 #define AND             ;
  37 #define DEFUN(name, arglist, args)      name arglist args;
  38 #endif
  39 #endif /* !DEFUN */
  40
  41 #ifndef PARAMS
  42 #if defined (__STDC__)
  43 #define PARAMS (paramlist)    paramlist
  44 #else
  45 #define PARAMS (paramlist)    ()
  46 #endif
  47 #endif
  48
  49 #ifndef JCF_u4
  50 #define JCF_u4 unsigned long
  51 #endif
  52 #ifndef JCF_u2
  53 #define JCF_u2 unsigned short
  54 #endif
  55
  56 #define ALLOC xmalloc
  57 #define REALLOC xrealloc
  58 #ifndef FREE
  59 #define FREE(PTR) free(PTR)
  60 #endif
  61
  62 #ifdef JCF_word
  63 #define JCF_word JCF_u4
  64 #endif
  65
  66 #define JCF_ZIP    1
  67 #define JCF_CLASS  2
  68 #define JCF_SOURCE 3
  69
  70 struct JCF;
  71 typedef int (*jcf_filbuf_t) PARAMS ((struct JCF*, int needed));
  72
  73 typedef struct CPool {
  74   /* Available number of elements in the constants array, before it
  75      must be re-allocated. */
  76   int capacity;
  77
  78   /* The constant_pool_count. */
  79   int           count;
  80
  81   uint8*        tags;
  82
  83   jword*        data;
  84 } CPool;
  85
  86 struct ZipDirectory;
  87
  88 /* JCF encapsulates the state of reading a Java Class File. */
  89
  90 typedef struct JCF {
  91   unsigned char *buffer;
  92   unsigned char *buffer_end;
  93   unsigned char *read_ptr;
  94   unsigned char *read_end;
  95   int java_source;
  96   jcf_filbuf_t filbuf;
  97   void *read_state;
  98   const char *filename;
  99   const char *classname;
 100   struct ZipDirectory *zipd;    /* Directory entry where it was found */
 101   JCF_u2 access_flags, this_class, super_class;
 102   CPool cpool;
 103 } JCF;
 104 /*typedef JCF*  JCF_FILE;*/
 105
 106 #define JCF_SEEN_IN_ZIP(JCF) ((JCF)->zipd != NULL)
 107
 108 /* The CPOOL macros take a (pointer to a) CPool.
 109    The JPOOL macros take a (pointer to a) JCF.
 110    Some of the latter should perhaps be deprecated or removed. */
 111
 112 #define CPOOL_COUNT(CPOOL) ((CPOOL)->count)
 113 #define JPOOL_SIZE(JCF) CPOOL_COUNT(&(JCF)->cpool)
 114 #define JPOOL_TAG(JCF, INDEX) ((JCF)->cpool.tags[INDEX])
 115 /* The INDEX'th constant pool entry as a JCF_u4. */
 116 #define CPOOL_UINT(CPOOL, INDEX) ((CPOOL)->data[INDEX])
 117 #define JPOOL_UINT(JCF, INDEX) CPOOL_UINT(&(JCF)->cpool, INDEX) /*deprecated*/
 118 /* The first uint16 of the INDEX'th constant pool entry. */
 119 #define CPOOL_USHORT1(CPOOL, INDEX) ((CPOOL)->data[INDEX] & 0xFFFF)
 120 #define JPOOL_USHORT1(JCF, INDEX) CPOOL_USHORT1(&(JCF)->cpool, INDEX)
 121 /* The second uint16 of the INDEX'th constant pool entry. */
 122 #define CPOOL_USHORT2(CPOOL, INDEX) ((CPOOL)->data[INDEX] >> 16)
 123 #define JPOOL_USHORT2(JCF, INDEX) CPOOL_USHORT2(&(JCF)->cpool, INDEX)
 124 #define JPOOL_LONG(JCF, INDEX) \
 125   WORDS_TO_LONG (JPOOL_UINT(JCF, INDEX), JPOOL_UINT(JCF, (INDEX)+1))
 126 #define JPOOL_DOUBLE(JCF, INDEX) \
 127   WORDS_TO_DOUBLE  (JPOOL_UINT(JCF, INDEX), JPOOL_UINT(JCF, (INDEX)+1))
 128 #ifndef JPOOL_UTF_LENGTH
 129 #define JPOOL_UTF_LENGTH(JCF, INDEX) \
 130   GET_u2 ((JCF)->buffer+JPOOL_UINT(JCF, INDEX))
 131 #endif
 132 #ifndef JPOOL_UTF_DATA
 133 #define JPOOL_UTF_DATA(JCF, INDEX) \
 134   ((JCF)->buffer+JPOOL_UINT(JCF, INDEX)+2)
 135 #endif
 136 #define JPOOL_INT(JCF, INDEX) (WORD_TO_INT(JPOOL_UINT (JCF, INDEX)))
 137 #define JPOOL_FLOAT(JCF, INDEX) WORD_TO_FLOAT (JPOOL_UINT (JCF, INDEX))
 138
 139 #define CPOOL_INDEX_IN_RANGE(CPOOL, INDEX) \
 140  ((INDEX) > 0 && (INDEX) < CPOOL_COUNT(CPOOL))
 141
 142 #define CPOOL_FINISH(CPOOL) { \
 143   if ((CPOOL)->tags) FREE ((CPOOL)->tags); \
 144   if ((CPOOL)->data) FREE ((CPOOL)->data); }
 145
 146 #define JCF_FINISH(JCF) { \
 147   CPOOL_FINISH(&(JCF)->cpool); \
 148   if ((JCF)->buffer) FREE ((JCF)->buffer); \
 149   if ((JCF)->filename) FREE ((char *) (JCF)->filename); \
 150   if ((JCF)->classname) FREE ((char *) (JCF)->classname); }
 151
 152 #define CPOOL_INIT(CPOOL) \
 153   ((CPOOL)->capacity = 0, (CPOOL)->count = 0, (CPOOL)->tags = 0, (CPOOL)->data = 0)
 154
 155 #define CPOOL_REINIT(CPOOL) ((CPOOL)->count = 0)
 156
 157 #define JCF_ZERO(JCF)  \
 158   ((JCF)->buffer = (JCF)->buffer_end = (JCF)->read_ptr = (JCF)->read_end = 0,\
 159    (JCF)->read_state = 0, (JCF)->filename = (JCF)->classname = 0, \
 160    CPOOL_INIT(&(JCF)->cpool), (JCF)->java_source = 0)
 161
 162 /* Given that PTR points to a 2-byte unsigned integer in network
 163    (big-endian) byte-order, return that integer. */
 164 #define GET_u2(PTR) (((PTR)[0] << 8) | ((PTR)[1]))
 165 /* Like GET_u2, but for little-endian format. */
 166 #define GET_u2_le(PTR) (((PTR)[1] << 8) | ((PTR)[0]))
 167
 168 /* Given that PTR points to a 4-byte unsigned integer in network
 169    (big-endian) byte-order, return that integer. */
 170 #define GET_u4(PTR) (((JCF_u4)(PTR)[0] << 24) | ((JCF_u4)(PTR)[1] << 16) \
 171   | ((JCF_u4)(PTR)[2] << 8) | ((JCF_u4)(PTR)[3]))
 172 /* Like GET_u4, but for little-endian order. */
 173 #define GET_u4_le(PTR) (((JCF_u4)(PTR)[3] << 24) | ((JCF_u4)(PTR)[2] << 16) \
 174   | ((JCF_u4)(PTR)[1] << 8) | ((JCF_u4)(PTR)[0]))
 175
 176 /* Make sure there are COUNT bytes readable. */
 177 #define JCF_FILL(JCF, COUNT) \
 178   ((JCF)->read_end-(JCF)->read_ptr >= (COUNT) ? 0 : (*(JCF)->filbuf)(JCF, COUNT))
 179 #define JCF_GETC(JCF) (JCF_FILL(JCF, 1) ? -1 : *(JCF)->read_ptr++)
 180 #define JCF_READ(JCF, BUFFER, N) \
 181     (memcpy (BUFFER, (JCF)->read_ptr, N), (JCF)->read_ptr += (N))
 182 #define JCF_SKIP(JCF,N) ((JCF)->read_ptr += (N))
 183 #define JCF_readu(JCF) (*(JCF)->read_ptr++)
 184
 185 /* Reads an unsigned 2-byte integer in network (big-endian) byte-order
 186    from JCF.  Returns that integer.
 187    Does not check for EOF (make sure to call JCF_FILL before-hand). */
 188 #define JCF_readu2(JCF) ((JCF)->read_ptr += 2, GET_u2 ((JCF)->read_ptr-2))
 189 #define JCF_readu2_le(JCF) ((JCF)->read_ptr += 2, GET_u2_le((JCF)->read_ptr-2))
 190
 191 /* Like JCF_readu2, but read a 4-byte unsigned integer. */
 192 #define JCF_readu4(JCF) ((JCF)->read_ptr += 4, GET_u4 ((JCF)->read_ptr-4))
 193 #define JCF_readu4_le(JCF) ((JCF)->read_ptr += 4, GET_u4_le((JCF)->read_ptr-4))
 194
 195 #define JCF_TELL(JCF) ((JCF)->read_ptr - (JCF)->buffer)
 196 #define JCF_SEEK(JCF, POS) ((JCF)->read_ptr = (JCF)->buffer + (POS))
 197
 198 #define ACC_PUBLIC 0x0001
 199 #define ACC_PRIVATE 0x0002
 200 #define ACC_PROTECTED 0x0004
 201 #define ACC_STATIC 0x0008
 202 #define ACC_FINAL 0x0010
 203 #define ACC_SYNCHRONIZED 0x0020
 204 #define ACC_SUPER 0x0020
 205 #define ACC_VOLATILE 0x0040
 206 #define ACC_TRANSIENT 0x0080
 207 #define ACC_NATIVE 0x0100
 208 #define ACC_INTERFACE 0x0200
 209 #define ACC_ABSTRACT 0x0400
 210
 211 #define ACC_VISIBILITY (ACC_PUBLIC | ACC_PRIVATE | ACC_PROTECTED)
 212
 213 #define CONSTANT_Class 7
 214 #define CONSTANT_Fieldref 9
 215 #define CONSTANT_Methodref 10
 216 #define CONSTANT_InterfaceMethodref 11
 217 #define CONSTANT_String 8
 218 #define CONSTANT_Integer 3
 219 #define CONSTANT_Float 4
 220 #define CONSTANT_Long 5
 221 #define CONSTANT_Double 6
 222 #define CONSTANT_NameAndType 12
 223 #define CONSTANT_Utf8 1
 224 #define CONSTANT_Unicode 2
 225
 226 #define DEFAULT_CLASS_PATH "."
 227
 228 extern const char *find_class PARAMS ((const char *, int, JCF*, int));
 229 extern const char *find_classfile PARAMS ((char *, JCF*, const char *));
 230 extern int jcf_filbuf_from_stdio PARAMS ((JCF *jcf, int count));
 231 extern int jcf_unexpected_eof PARAMS ((JCF*, int)) ATTRIBUTE_NORETURN;
 232
 233 /* Extract a character from a Java-style Utf8 string.
 234  * PTR points to the current character.
 235  * LIMIT points to the end of the Utf8 string.
 236  * PTR is incremented to point after the character thta gets returns.
 237  * On an error, -1 is returned. */
 238 #define UTF8_GET(PTR, LIMIT) \
 239   ((PTR) >= (LIMIT) ? -1 \
 240    : *(PTR) < 128 ? *(PTR)++ \
 241    : (*(PTR)&0xE0) == 0xC0 && ((PTR)+=2)<=(LIMIT) && ((PTR)[-1]&0xC0) == 0x80 \
 242    ? (((PTR)[-2] & 0x1F) << 6) + ((PTR)[-1] & 0x3F) \
 243    : (*(PTR) & 0xF0) == 0xE0 && ((PTR) += 3) <= (LIMIT) \
 244    && ((PTR)[-2] & 0xC0) == 0x80 && ((PTR)[-1] & 0xC0) == 0x80 \
 245    ? (((PTR)[-3]&0x0F) << 12) + (((PTR)[-2]&0x3F) << 6) + ((PTR)[-1]&0x3F) \
 246    : ((PTR)++, -1))
 247
 248 extern char *jcf_write_base_directory;
 249
 250 /* Debug macros, for the front end */
 251
 252 extern int quiet_flag;
 253 #ifdef VERBOSE_SKELETON
 254 #undef SOURCE_FRONTEND_DEBUG
 255 #define SOURCE_FRONTEND_DEBUG(X)                                \
 256   {if (!quiet_flag) {printf ("* "); printf X; putchar ('\n');} }
 257 #else
 258 #define SOURCE_FRONTEND_DEBUG(X)
 259 #endif
 260
 261 /* Declarations for dependency code.  */
 262 extern void jcf_dependency_reset PARAMS ((void));
 263 extern void jcf_dependency_set_target PARAMS ((const char *));
 264 extern void jcf_dependency_add_target PARAMS ((const char *));
 265 extern void jcf_dependency_set_dep_file PARAMS ((const char *));
 266 extern void jcf_dependency_add_file PARAMS ((const char *, int));
 267 extern void jcf_dependency_write PARAMS ((void));
 268 extern void jcf_dependency_init PARAMS ((int));
 269 extern void jcf_dependency_print_dummies PARAMS ((void));
 270
 271 /* Declarations for path handling code.  */
 272 extern void jcf_path_init PARAMS ((void));
 273 extern void jcf_path_classpath_arg PARAMS ((const char *));
 274 extern void jcf_path_CLASSPATH_arg PARAMS ((const char *));
 275 extern void jcf_path_include_arg PARAMS ((const char *));
 276 extern void jcf_path_seal PARAMS ((void));
 277 extern void *jcf_path_start PARAMS ((void));
 278 extern void *jcf_path_next PARAMS ((void *));
 279 extern char *jcf_path_name PARAMS ((void *));
 280 extern int jcf_path_is_zipfile PARAMS ((void *));
 281 extern int jcf_path_is_system PARAMS ((void *));
 282 extern int jcf_path_max_len PARAMS ((void));
 283
 284 #endif