slang/slang-mc.h

   1 #ifndef DAVIS_SLANG_H_
   2 #define DAVIS_SLANG_H_
   3 /* -*- mode: C; mode: fold; -*- */
   4 /* Copyright (c) 1992, 1995 John E. Davis
   5  * All rights reserved.
   6  *
   7  * You may distribute under the terms of either the GNU General Public
   8  * License or the Perl Artistic License.
   9  */
  10 #define SLANG_VERSION 9938
  11 /*{{{ System Dependent Macros and Typedefs */
  12
  13 #if defined(__WATCOMC__) && !defined(__QNX__)
  14 #  ifndef msdos
  15 #    define msdos
  16 #  endif
  17 #  ifndef  DOS386
  18 #    define  DOS386
  19 #  endif
  20 #  ifndef FLOAT_TYPE
  21 #    define FLOAT_TYPE
  22 #  endif
  23 #  ifndef pc_system
  24 #    define pc_system
  25 #  endif
  26 #endif /* __watcomc__ */
  27
  28 #ifdef unix
  29 # ifndef __unix__
  30 #  define __unix__ 1
  31 # endif
  32 #endif
  33
  34 #ifndef __GO32__
  35 # ifdef __unix__
  36 #  define REAL_UNIX_SYSTEM
  37 # endif
  38 #endif
  39
  40 /* Set of the various defines for pc systems.  This includes OS/2 */
  41 #ifdef __MSDOS__
  42 # ifndef msdos
  43 #   define msdos
  44 # endif
  45 # ifndef pc_system
  46 #   define pc_system
  47 # endif
  48 #endif
  49
  50 #ifdef __GO32__
  51 # ifndef pc_system
  52 #   define pc_system
  53 # endif
  54 # ifdef REAL_UNIX_SYSTEM
  55 #   undef REAL_UNIX_SYSTEM
  56 # endif
  57 #endif
  58
  59 #if defined(__EMX__) && defined(OS2)
  60 # ifndef pc_system
  61 #   define pc_system
  62 # endif
  63 # ifndef __os2__
  64 #   define __os2__
  65 #   define NEEDS_LOCAL_DIRENT_H
  66 # endif
  67 #endif
  68
  69 #ifdef __cplusplus
  70 extern "C" {
  71 #endif
  72 #if 0
  73 }
  74 #endif
  75 /* ---------------------------- Generic Macros ----------------------------- */
  76
  77 /*  __SC__ is defined for Symantec C++
  78    DOS386 is defined for -mx memory model, 32 bit DOS extender. */
  79
  80 #ifdef VOID
  81 # undef VOID
  82 #endif
  83
  84 #if defined(msdos) && !defined(DOS386) & !defined(__WIN32__) && !defined(__GO32__)
  85 # ifdef __SC__
  86 #  include <dos.h>
  87 # endif
  88    typedef void *VOID_STAR;
  89 # define VOID void
  90 # include <alloc.h>
  91 #else
  92 # if defined (__cplusplus) || defined(__STDC__)
  93    typedef void *VOID_STAR;
  94 #  define VOID void
  95 # else
  96    typedef unsigned char *VOID_STAR;
  97 #  define VOID unsigned char
  98 # endif
  99 #endif
 100
 101 #if 1
 102    typedef int (*FVOID_STAR)(void);
 103 #else
 104 # define FVOID_STAR VOID_STAR
 105 #endif
 106
 107 #if defined(msdos) && !defined(DOS386) && !defined(__GO32__) && !defined(__WIN32__)
 108 # define SLFREE(buf)  farfree((void far *)(buf))
 109 # define SLMALLOC(x) farmalloc((unsigned long) (x))
 110 # define SLREALLOC(buf, n) farrealloc((void far *) (buf), (unsigned long) (n))
 111 # define SLCALLOC(n, m) farcalloc((unsigned long) (n), (unsigned long) (m))
 112 #else
 113 # if defined(VMS) && !defined(__DECC)
 114 #  define SLFREE VAXC$FREE_OPT
 115 #  define SLMALLOC VAXC$MALLOC_OPT
 116 #  define SLREALLOC VAXC$REALLOC_OPT
 117 #  define SLCALLOC VAXC$CALLOC_OPT
 118 # else
 119 #  define SLFREE(x) free((char *)(x))
 120 #  define SLMALLOC malloc
 121 #  if defined(__cplusplus) && !defined(__BEOS__)
 122 #   define SLREALLOC(p,n) realloc((malloc_t) (p), (n))
 123 #  else
 124 #   define SLREALLOC realloc
 125 #  endif
 126 #  define SLCALLOC calloc
 127 # endif
 128 #endif
 129
 130 #ifdef SL_MALLOC_DEBUG
 131 # undef SLMALLOC
 132 # undef SLCALLOC
 133 # undef SLREALLOC
 134 # undef SLFREE
 135 # define SLMALLOC(x) SLdebug_malloc((unsigned long) (x))
 136 # define SLFREE(x) SLdebug_free((unsigned char *)(x))
 137 # define SLCALLOC(n, m) SLdebug_calloc((unsigned long) (n), (unsigned long)(m))
 138 # define SLREALLOC(p, x) SLdebug_realloc((unsigned char *)(p), (unsigned long)(x))
 139 #endif /* SL_MALLOC_DEBUG */
 140
 141    extern unsigned char *SLdebug_malloc (unsigned long);
 142    extern unsigned char *SLdebug_calloc (unsigned long, unsigned long);
 143    extern unsigned char *SLdebug_realloc (unsigned char *, unsigned long);
 144    extern void SLdebug_free (unsigned char *);
 145    extern void SLmalloc_dump_statistics (void);
 146    extern char *SLstrcpy(register char *, register char *);
 147    extern int SLstrcmp(register char *, register char *);
 148    extern char *SLstrncpy(char *, register char *, register  int);
 149
 150    extern void SLmemset (char *, char, int);
 151    extern char *SLmemchr (register char *, register char, register int);
 152    extern char *SLmemcpy (char *, char *, int);
 153    extern int SLmemcmp (char *, char *, int);
 154
 155 #ifdef float64
 156 # undef float64
 157 #endif
 158
 159 #ifndef FLOAT64_TYPEDEFED
 160 # define FLOAT64_TYPEDEFED
 161   typedef double float64;
 162 #endif
 163
 164
 165 /*}}}*/
 166
 167 /*{{{ Interpreter Typedefs */
 168
 169 #define SLANG_MAX_NAME_LEN 30
 170 /* maximum length of an identifier */
 171 /* first char in identifiers is the hash */
 172
 173    /* Note that long is used for addresses instead of void *.  The reason for
 174     * this is that I have a gut feeling that sizeof (long) > sizeof(void *)
 175     * on some machines.  This is certainly the case for MSDOS where addresses
 176     * can be 16 bit.
 177     */
 178 typedef struct SLang_Name_Type
 179   {
 180 #ifdef SLANG_STATS
 181      int n;                            /* number of times referenced */
 182 #endif
 183      char name[SLANG_MAX_NAME_LEN + 2]; /* [0] is hash */
 184
 185      unsigned char sub_type;
 186
 187 /* Values for main_type may be as follows.  The particlular values are
 188  * for compatability.
 189  */
 190 #define SLANG_LVARIABLE         0x01
 191 #define SLANG_INTRINSIC         0x06
 192 #define SLANG_FUNCTION          0x07
 193 #define SLANG_GVARIABLE         0x0D
 194 #define SLANG_IVARIABLE         0x0E           /* intrinsic variables */
 195 /* Note!!! For Macro MAKE_VARIABLE below to work, SLANG_IVARIABLE Must
 196    be 1 less than SLANG_RVARIABLE!!! */
 197 #define SLANG_RVARIABLE         0x0F           /* read only variable */
 198      unsigned char main_type;
 199      long addr;
 200   }
 201 SLang_Name_Type;
 202
 203
 204 typedef struct SLang_Load_Type
 205 {
 206    long name;                          /* file name, string address, ... */
 207    long handle;                        /* FILE *, string address, etc... */
 208
 209    char *ptr;                          /* input pointer to next line in object
 210                                         * to be read.
 211                                         */
 212    /* Things below here are used by S-Lang. */
 213    int type;                           /* 'F' = file, 'S' = String, etc.. */
 214    char *buf;                          /* buffer for file, etc... */
 215    char *(*read)(struct SLang_Load_Type *);   /* function to call to read obj */
 216    int n;                              /* line number, etc... */
 217    char token[256];                    /* token to be parsed */
 218    int ofs;                            /* offset from buf where last read
 219                                         * took place
 220                                         */
 221    int top_level;                      /* 1 if at top level of parsing */
 222 } SLang_Load_Type;
 223
 224 #if defined(ultrix) && !defined(__GNUC__)
 225 # ifndef NO_PROTOTYPES
 226 #  define NO_PROTOTYPES
 227 # endif
 228 #endif
 229
 230 #ifndef NO_PROTOTYPES
 231 # define _PROTO(x) x
 232 #else
 233 # define _PROTO(x) ()
 234 #endif
 235
 236 typedef struct SL_OOBinary_Type
 237 {
 238    unsigned char sub_type;             /* partner type for binary op */
 239
 240    /* The function take the binary op as first argument, the operand types
 241     * form the second and third parameters and the last two parameters are
 242     * pointers to the objects themselves.  It is up to the function to push
 243     * the result on the stack.  It must return 1 if it handled the operation
 244     * return zero if the operation is not defined.
 245     */
 246    int (*binary_function)_PROTO((int, unsigned char, unsigned char,
 247                                   VOID_STAR, VOID_STAR));
 248
 249    struct SL_OOBinary_Type *next;
 250 }
 251 SL_OOBinary_Type;
 252
 253 typedef struct
 254 {
 255    /* Methods */
 256    void (*destroy)_PROTO((VOID_STAR));
 257    /* called to delete/free the object */
 258    char *(*string)_PROTO((VOID_STAR));
 259    /* returns a string representation of the object */
 260    int (*unary_function)_PROTO((int, unsigned char, VOID_STAR));
 261    /* unary operation function */
 262    SL_OOBinary_Type *binary_ops;
 263
 264    int (*copy_function)_PROTO((unsigned char, VOID_STAR));
 265    /* This function is called do make a copy of the object */
 266 } SLang_Class_Type;
 267
 268 extern SLang_Class_Type *SLang_Registered_Types[256];
 269
 270 typedef struct
 271 {
 272    unsigned char main_type;            /* SLANG_RVARIABLE, etc.. */
 273    unsigned char sub_type;             /* int, string, etc... */
 274    long *obj;                          /* address of user structure */
 275
 276    /* Everything below is considered private */
 277    unsigned int count;                 /* number of references */
 278 }
 279 SLuser_Object_Type;
 280
 281
 282 /*}}}*/
 283 /*{{{ Interpreter Function Prototypes */
 284
 285   extern volatile int SLang_Error;
 286   /* Non zero if error occurs.  Must be reset to zero to continue. */
 287
 288   extern int SLang_Traceback;
 289   /* If non-zero, dump an S-Lang traceback upon error.  Available as
 290      _traceback in S-Lang. */
 291
 292   extern char *SLang_User_Prompt;
 293   /* Prompt to use when reading from stdin */
 294   extern int SLang_Version;
 295
 296   extern void (*SLang_Error_Routine)(char *);
 297   /* Pointer to application dependent error messaging routine.  By default,
 298      messages are displayed on stderr. */
 299
 300   extern void (*SLang_Exit_Error_Hook)(char *);
 301   extern void SLang_exit_error (char *);
 302   extern void (*SLang_Dump_Routine)(char *);
 303   /* Called if S-Lang traceback is enabled as well as other debugging
 304      routines (e.g., trace).  By default, these messages go to stderr. */
 305
 306   extern void (*SLang_Interrupt)(void);
 307   /* function to call whenever inner interpreter is entered.  This is
 308      a good place to set SLang_Error to USER_BREAK. */
 309
 310   extern void (*SLang_User_Clear_Error)(void);
 311   /* function that gets called when '_clear_error' is called. */
 312   extern int (*SLang_User_Open_Slang_Object)(SLang_Load_Type *);
 313   extern int (*SLang_User_Close_Slang_Object)(SLang_Load_Type *);
 314   /* user defined loading routines. */
 315
 316
 317   /* If non null, these call C functions before and after a slang function. */
 318   extern void (*SLang_Enter_Function)(char *);
 319   extern void (*SLang_Exit_Function)(char *);
 320
 321
 322 /* Functions: */
 323
 324    extern int init_SLang(void);
 325    /* This function is mandatory and must be called by all applications */
 326    extern int init_SLfiles(void);
 327    /* called if fputs, fgets, etc are need in S-Lang */
 328    extern int init_SLmath(void);
 329    /* called if math functions sin, cos, etc... are needed. */
 330
 331    extern int init_SLunix(void);
 332    /* unix system functions chmod, stat, etc... */
 333
 334    extern int init_SLmatrix(void);
 335
 336    extern int SLang_add_table(SLang_Name_Type *, char *);
 337    /* add application dependent function table p1 to S-Lang.  A name p2 less
 338     *  than 32 characters must also be supplied.
 339     * Returns 0 upon failure or 1 upon success. */
 340
 341    extern int SLang_add_global_variable (char *);
 342    extern int SLang_load_object(SLang_Load_Type *);
 343    extern int SLang_load_file(char *);
 344    /* Load a file of S-Lang code for interpreting.  If the parameter is
 345    NULL, input comes from stdin. */
 346
 347    extern void SLang_restart(int);
 348    /* should be called if an error occurs.  If the passed integer is
 349     * non-zero, items are popped off the stack; otherwise, the stack is
 350     * left intact.  Any time the stack is believed to be trashed, this routine
 351     * should be called with a non-zero argument (e.g., if setjmp/longjmp is
 352     * called). */
 353
 354    extern void SLang_byte_compile_file(char *, int *);
 355    /* takes a file of S-Lang code and ``byte-compiles'' it for faster
 356     * loading.  The new filename is equivalent to the old except that a `c' is
 357     * appended to the name.  (e.g., init.sl --> init.slc).  If the second
 358     * parameter is non-zero, preprocess the file only.
 359     */
 360
 361    extern void SLang_autoload(char *, char *);
 362    /* Automatically load S-Lang function p1 from file p2.  This function
 363       is also available via S-Lang */
 364
 365    extern char *SLang_load_string(char *);
 366    /* Like SLang_load_file except input is from a null terminated string. */
 367
 368    extern void SLang_do_pop(void);
 369    /* pops item off stack and frees any memory associated with it */
 370
 371    extern int SLang_pop_integer(int *);
 372    /* pops integer *p0 from the stack.  Returns 0 upon success and non-zero
 373     * if the stack is empty or a type mismatch occurs, setting SLang_Error.
 374     */
 375
 376    extern int SLpop_string (char **);
 377    extern int SLang_pop_string(char **, int *);
 378    /* pops string *p0 from stack.  If *p1 is non-zero, the string must be
 379     * freed after its use.  DO NOT FREE p0 if *p1 IS ZERO! Returns 0 upon
 380     * success */
 381
 382    extern int SLang_pop_float(float64 *, int *, int *);
 383    /* Pops float *p1 from stack.  If *p3 is non-zero, *p1 was derived
 384       from the integer *p2. Returns zero upon success. */
 385
 386    extern SLuser_Object_Type *SLang_pop_user_object (unsigned char);
 387    extern void SLang_free_user_object (SLuser_Object_Type *);
 388    extern void SLang_free_intrinsic_user_object (SLuser_Object_Type *);
 389    /* This is like SLang_free_user_object but is meant to free those
 390     * that have been declared as intrinsic variables by the application.
 391     * Normally an application would never need to call this.
 392     */
 393
 394    extern void SLang_push_user_object (SLuser_Object_Type *);
 395    extern SLuser_Object_Type *SLang_create_user_object (unsigned char);
 396
 397    extern int SLang_add_unary_op (unsigned char, FVOID_STAR);
 398    extern int SLang_add_binary_op (unsigned char, unsigned char, FVOID_STAR);
 399    extern int SLang_register_class (unsigned char, FVOID_STAR, FVOID_STAR);
 400    extern int SLang_add_copy_operation (unsigned char, FVOID_STAR);
 401
 402    extern long *SLang_pop_pointer(unsigned char *, unsigned char *, int *);
 403    /* Returns a pointer to object of type *p1,*p2 on top of stack.
 404       If *p3 is non-zero, the Object must be freed after use. */
 405
 406
 407    extern void SLang_push_float(float64);
 408    /* Push Float onto stack */
 409
 410    extern void SLang_push_string(char *);
 411    /* Push string p1 onto stack */
 412
 413    extern void SLang_push_integer(int);
 414    /* push integer p1 on stack */
 415
 416    extern void SLang_push_malloced_string(char *);
 417    /* The normal SLang_push_string mallocs space for the string.  This one
 418       does not.  DO NOT FREE IT IF YOU USE THIS ROUTINE */
 419
 420    extern int SLang_is_defined(char *);
 421    /* Return non-zero is p1 is defined otherwise returns 0. */
 422
 423    extern int SLang_run_hooks(char *, char *, char *);
 424    /* calls S-Lang function p1 pushing strings p2 and p3 onto the stack
 425     * first.  If either string is NULL, it is not pushed. If p1 is not
 426     * defined, 0 is returned. */
 427
 428    extern int SLang_execute_function(char *);
 429    /* Call S-Lang function p1.  Returns 0 if the function is not defined
 430     * and 1 if it is.
 431     */
 432
 433    extern char *SLang_find_name(char *);
 434    /* Return a pointer to p1 in table if it is defined.  Returns NULL
 435     * otherwise.  This is useful when one wants to avoid redundant strings.
 436     */
 437
 438    extern char *SLang_rpn_interpret(char *);
 439    /* Interpret string as reverse polish notation */
 440
 441    extern void SLang_doerror(char *);
 442    /* set SLang_Error and display p1 as error message */
 443
 444    extern SLuser_Object_Type *SLang_add_array(char *, long *,
 445                                               int, int, int, int,
 446                                               unsigned char, unsigned char);
 447    /* This function has not been tested thoroughly yet.  Its purpose is to
 448     * allow a S-Lang procedure to access a C array. For example, suppose that
 449     * you have an array of 100 ints defined as:
 450     *
 451     *  int c_array[100];
 452     *
 453     * By calling something like:
 454     *
 455     *   SLang_add_array ("array_name", (long *) c_array, 1, 100, 0, 0,
 456     *                    'i', SLANG_IVARIABLE);
 457     *
 458     * the array can be accessed by the name 'array_name'.  This function
 459     * returns -1 upon failure.  The 3rd argument specifies the dimension
 460     * of the array, the 4th, and 5th arguments specify how many elements
 461     * there are in the x,y, and z directions.  The last argument must
 462     * be one of:
 463     *
 464     *        SLANG_IVARIABLE:  indicates array is writable
 465     *        SLANG_RVARIABLE:  indicates array is read only
 466     *
 467     * Returns NULL upon failure.
 468     */
 469
 470
 471 extern int SLang_free_array_handle (int);
 472 /* This routine may be called by application to free array handle created by
 473  * the application.  Returns 0 upon success, -1 if the handle is invalid and
 474  * -2 if the handle is not associated with a C array.
 475  */
 476
 477    extern char *SLang_extract_list_element(char *, int *, int*);
 478    extern void SLexpand_escaped_string (register char *, register char *,
 479                                         register char *);
 480
 481 extern SLang_Name_Type *SLang_get_function (char *);
 482 /* The parameter is the name of a user defined S-Lang function.  This
 483  * routine returns NULL if the function does not exist or it returns the
 484  * a pointer to it in an internal S-Lang table.  This pointer can be used
 485  * by 'SLexecute_function' to call the function directly from C.
 486  */
 487
 488 extern void SLexecute_function(SLang_Name_Type *);
 489 /* This function allows an application to call a S-Lang function from within
 490  * the C program.  The parameter must be non-NULL and must have been
 491  * previously obtained by a call to 'SLang_get_function'.
 492  */
 493 extern void SLroll_stack (int *);
 494 /* If argument *p is positive, the top |*p| objects on the stack are rolled
 495  * up.  If negative, the stack is rolled down.
 496  */
 497
 498 extern void SLmake_lut (unsigned char *, unsigned char *, unsigned char);
 499
 500    extern int SLang_guess_type (char *);
 501
 502
 503 /*}}}*/
 504
 505 /*{{{ Misc Functions */
 506
 507 extern char *SLmake_string (char *);
 508 extern char *SLmake_nstring (char *, unsigned int);
 509 /* Returns a null terminated string made from the first n characters of the
 510  * string.
 511  */
 512
 513 extern char *SLcurrent_time_string (void);
 514
 515 extern int SLatoi(unsigned char *);
 516
 517 extern int SLang_extract_token(char **, char *, int);
 518 /* returns 0 upon failure and non-zero upon success.  The first parameter
 519  * is a pointer to the input stream which this function will bump along.
 520  * The second parameter is the buffer where the token is placed.  The third
 521  * parameter is used internally by the S-Lang library and should be 0 for
 522  * user applications.
 523  */
 524
 525 /*}}}*/
 526
 527 /*{{{ SLang getkey interface Functions */
 528
 529 #ifdef REAL_UNIX_SYSTEM
 530 extern int SLang_TT_Baud_Rate;
 531 extern int SLang_TT_Read_FD;
 532 #endif
 533
 534 extern int SLang_init_tty (int, int, int);
 535 /* Initializes the tty for single character input.  If the first parameter *p1
 536  * is in the range 0-255, it will be used for the abort character;
 537  * otherwise, (unix only) if it is -1, the abort character will be the one
 538  * used by the terminal.  If the second parameter p2 is non-zero, flow
 539  * control is enabled.  If the last parmeter p3 is zero, output processing
 540  * is NOT turned on.  A value of zero is required for the screen management
 541  * routines. Returns 0 upon success. In addition, if SLang_TT_Baud_Rate ==
 542  * 0 when this function is called, SLang will attempt to determine the
 543  * terminals baud rate.  As far as the SLang library is concerned, if
 544  * SLang_TT_Baud_Rate is less than or equal to zero, the baud rate is
 545  * effectively infinite.
 546  */
 547
 548 extern void SLang_reset_tty (void);
 549 /* Resets tty to what it was prior to a call to SLang_init_tty */
 550 #ifdef REAL_UNIX_SYSTEM
 551 extern void SLtty_set_suspend_state (int);
 552    /* If non-zero argument, terminal driver will be told to react to the
 553     * suspend character.  If 0, it will not.
 554     */
 555 extern int (*SLang_getkey_intr_hook) (void);
 556 #endif
 557
 558 #define SLANG_GETKEY_ERROR 0xFFFF
 559 extern unsigned int SLang_getkey (void);
 560 /* reads a single key from the tty.  If the read fails,  0xFFFF is returned. */
 561
 562 extern void SLang_ungetkey_string (unsigned char *, unsigned int);
 563 extern void SLang_buffer_keystring (unsigned char *, unsigned int);
 564 extern void SLang_ungetkey (unsigned char);
 565 extern void SLang_flush_input (void);
 566 extern int SLang_input_pending (int);
 567 extern int SLang_Abort_Char;
 568 /* The value of the character (0-255) used to trigger SIGINT */
 569 extern int SLang_Ignore_User_Abort;
 570 /* If non-zero, pressing the abort character will not result in USER_BREAK
 571  * SLang_Error. */
 572
 573 extern void SLang_set_abort_signal (void (*)(int));
 574 /* If SIGINT is generated, the function p1 will be called.  If p1 is NULL
 575  * the SLang_default signal handler is called.  This sets SLang_Error to
 576  * USER_BREAK.  I suspect most users will simply want to pass NULL.
 577  */
 578
 579 extern volatile int SLKeyBoard_Quit;
 580
 581 #ifdef VMS
 582 /* If this function returns -1, ^Y will be added to input buffer. */
 583 extern int (*SLtty_VMS_Ctrl_Y_Hook) (void);
 584 #endif
 585 /*}}}*/
 586
 587 /*{{{ SLang Keymap routines */
 588
 589 typedef struct SLKeymap_Function_Type
 590   {
 591       char *name;
 592       int (*f)(void);
 593   }
 594 SLKeymap_Function_Type;
 595
 596 typedef struct SLang_Key_Type
 597   {
 598      unsigned char str[13];            /* key sequence */
 599 #define SLKEY_F_INTERPRET       0x01
 600 #define SLKEY_F_INTRINSIC       0x02
 601 #define SLKEY_F_KEYSYM          0x03
 602      unsigned char type;               /* type of function */
 603 #ifdef SLKEYMAP_OBSOLETE
 604      VOID_STAR f;                              /* function to invoke */
 605 #else
 606      union
 607        {
 608           char *s;
 609           FVOID_STAR f;
 610           unsigned int keysym;
 611        }
 612      f;
 613 #endif
 614      struct SLang_Key_Type *next;      /* */
 615   }
 616 SLang_Key_Type;
 617
 618 #define MAX_KEYMAP_NAME_LEN 8
 619 typedef struct SLKeyMap_List_Type
 620 {
 621    char name[MAX_KEYMAP_NAME_LEN + 1];
 622    SLang_Key_Type *keymap;
 623    SLKeymap_Function_Type *functions;  /* intrinsic functions */
 624 }
 625 SLKeyMap_List_Type;
 626
 627 /* This is arbitrary but I have got to start somewhere */
 628 #ifdef msdos
 629 #define SLANG_MAX_KEYMAPS 10
 630 #else
 631 #define SLANG_MAX_KEYMAPS 30
 632 #endif
 633
 634 extern SLKeyMap_List_Type SLKeyMap_List[SLANG_MAX_KEYMAPS];   /* these better be inited to 0! */
 635
 636
 637 extern char *SLang_process_keystring(char *);
 638
 639 #ifdef SLKEYMAP_OBSOLETE
 640 extern int SLang_define_key1(char *, VOID_STAR, unsigned int, SLKeyMap_List_Type *);
 641 /* define key p1 in keymap p4 to invoke function p2.  If type p3 is given by
 642  * SLKEY_F_INTRINSIC, p2 is an intrinsic function, else it is a string to be
 643  * passed to the interpreter for evaluation.  The return value is important.
 644  * It returns 0 upon success, -1 upon malloc error, and -2 if the key is
 645  * inconsistent.  SLang_Error is set upon error. */
 646 #else
 647 extern int SLkm_define_key (char *, FVOID_STAR, SLKeyMap_List_Type *);
 648 #endif
 649
 650 extern int SLang_define_key(char *, char *, SLKeyMap_List_Type *);
 651 /* Like define_key1 except that p2 is a string that is to be associated with
 652  * a function in the functions field of p3.  This routine calls define_key1.
 653  */
 654
 655 extern int SLkm_define_keysym (char *, unsigned int, SLKeyMap_List_Type *);
 656
 657 extern void SLang_undefine_key(char *, SLKeyMap_List_Type *);
 658
 659 extern SLKeyMap_List_Type *SLang_create_keymap(char *, SLKeyMap_List_Type *);
 660 /* create and returns a pointer to a new keymap named p1 created by copying
 661  * keymap p2.  If p2 is NULL, it is up to the calling routine to initialize
 662  * the keymap.
 663  */
 664
 665 extern char *SLang_make_keystring(unsigned char *);
 666
 667 extern SLang_Key_Type *SLang_do_key(SLKeyMap_List_Type *, int (*)(void));
 668 /* read a key using keymap p1 with getkey function p2 */
 669
 670 extern
 671 #ifdef SLKEYMAP_OBSOLETE
 672      VOID_STAR
 673 #else
 674      FVOID_STAR
 675 #endif
 676      SLang_find_key_function(char *, SLKeyMap_List_Type *);
 677
 678 extern SLKeyMap_List_Type *SLang_find_keymap(char *);
 679
 680 extern int SLang_Last_Key_Char;
 681 extern int SLang_Key_TimeOut_Flag;
 682
 683
 684 /*}}}*/
 685
 686 /*{{{ SLang Readline Interface */
 687
 688 typedef struct SLang_Read_Line_Type
 689 {
 690    struct SLang_Read_Line_Type *prev, *next;
 691    unsigned char *buf;
 692    int buf_len;                        /* number of chars in the buffer */
 693    int num;                            /* num and misc are application specific*/
 694    int misc;
 695 } SLang_Read_Line_Type;
 696
 697 /* Maximum size of display */
 698 #define SLRL_DISPLAY_BUFFER_SIZE 256
 699
 700 typedef struct
 701 {
 702    SLang_Read_Line_Type *root, *tail, *last;
 703    unsigned char *buf;                 /* edit buffer */
 704    int buf_len;                        /* sizeof buffer */
 705    int point;                          /* current editing point */
 706    int tab;                            /* tab width */
 707    int len;                            /* current line size */
 708
 709    /* display variables */
 710    int edit_width;                     /* length of display field */
 711    int curs_pos;                               /* current column */
 712    int start_column;                   /* column offset of display */
 713    int dhscroll;                       /* amount to use for horiz scroll */
 714    char *prompt;
 715
 716    FVOID_STAR last_fun;                /* last function executed by rl */
 717
 718    /* These two contain an image of what is on the display */
 719    unsigned char upd_buf1[SLRL_DISPLAY_BUFFER_SIZE];
 720    unsigned char upd_buf2[SLRL_DISPLAY_BUFFER_SIZE];
 721    unsigned char *old_upd, *new_upd;   /* pointers to previous two buffers */
 722    int new_upd_len, old_upd_len;       /* length of output buffers */
 723
 724    SLKeyMap_List_Type *keymap;
 725
 726    /* tty variables */
 727    unsigned int flags;                 /*  */
 728 #define SL_RLINE_NO_ECHO        1
 729 #define SL_RLINE_USE_ANSI       2
 730    unsigned int (*getkey)(void);       /* getkey function -- required */
 731    void (*tt_goto_column)(int);
 732    void (*tt_insert)(char);
 733    void (*update_hook)(unsigned char *, int, int);
 734    /* The update hook is called with a pointer to a buffer p1 that contains
 735     * an image of what the update hook is suppoed to produce.  The length
 736     * of the buffer is p2 and after the update, the cursor is to be placed
 737     * in column p3.
 738     */
 739 } SLang_RLine_Info_Type;
 740
 741 extern int SLang_RL_EOF_Char;
 742
 743 extern SLang_Read_Line_Type * SLang_rline_save_line (SLang_RLine_Info_Type *);
 744 extern int SLang_init_readline (SLang_RLine_Info_Type *);
 745 extern int SLang_read_line (SLang_RLine_Info_Type *);
 746 extern int SLang_rline_insert (char *);
 747 extern void SLrline_redraw (SLang_RLine_Info_Type *);
 748 extern int SLang_Rline_Quit;
 749
 750 /*}}}*/
 751
 752 /*{{{ Low Level Screen Output Interface */
 753
 754 extern unsigned long SLtt_Num_Chars_Output;
 755 extern int SLtt_Baud_Rate;
 756
 757 typedef unsigned long SLtt_Char_Type;
 758
 759 #define SLTT_BOLD_MASK  0x01000000
 760 #define SLTT_BLINK_MASK 0x02000000
 761 #define SLTT_ULINE_MASK 0x04000000
 762 #define SLTT_REV_MASK   0x08000000
 763 #define SLTT_ALTC_MASK  0x10000000
 764
 765 extern int SLtt_Screen_Rows;
 766 extern int SLtt_Screen_Cols;
 767 extern int SLtt_Term_Cannot_Insert;
 768 extern int SLtt_Term_Cannot_Scroll;
 769 extern int SLtt_Use_Ansi_Colors;
 770 extern int SLtt_Ignore_Beep;
 771 #if defined(REAL_UNIX_SYSTEM)
 772 extern int SLtt_Force_Keypad_Init;
 773 #endif
 774
 775 #ifndef __GO32__
 776 #if defined(VMS) || defined(REAL_UNIX_SYSTEM)
 777 extern int SLtt_Blink_Mode;
 778 extern int SLtt_Use_Blink_For_ACS;
 779 extern int SLtt_Newline_Ok;
 780 extern int SLtt_Has_Alt_Charset;
 781 extern int SLtt_Has_Status_Line;       /* if 0, NO.  If > 0, YES, IF -1, ?? */
 782 # ifndef VMS
 783 extern int SLtt_Try_Termcap;
 784 # endif
 785 #endif
 786 #endif
 787
 788 #ifdef msdos
 789 extern int SLtt_Msdos_Cheap_Video;
 790 #endif
 791
 792
 793 extern int SLtt_flush_output (void);
 794 extern void SLtt_set_scroll_region(int, int);
 795 extern void SLtt_reset_scroll_region(void);
 796 extern void SLtt_reverse_video (int);
 797 extern void SLtt_bold_video (void);
 798 extern void SLtt_begin_insert(void);
 799 extern void SLtt_end_insert(void);
 800 extern void SLtt_del_eol(void);
 801 extern void SLtt_goto_rc (int, int);
 802 extern void SLtt_delete_nlines(int);
 803 extern void SLtt_delete_char(void);
 804 extern void SLtt_erase_line(void);
 805 extern void SLtt_normal_video(void);
 806 extern void SLtt_cls(void);
 807 extern void SLtt_beep(void);
 808 extern void SLtt_reverse_index(int);
 809 extern void SLtt_smart_puts(unsigned short *, unsigned short *, int, int);
 810 extern void SLtt_write_string (char *);
 811 extern void SLtt_putchar(char);
 812 extern void SLtt_init_video (void);
 813 extern void SLtt_reset_video (void);
 814 extern void SLtt_get_terminfo(void);
 815 extern void SLtt_get_screen_size (void);
 816 extern int SLtt_set_cursor_visibility (int);
 817
 818 #if defined(VMS) || defined(REAL_UNIX_SYSTEM)
 819 extern void SLtt_enable_cursor_keys(void);
 820 extern void SLtt_set_term_vtxxx(int *);
 821 extern void SLtt_set_color_esc (int, char *);
 822 extern void SLtt_wide_width(void);
 823 extern void SLtt_narrow_width(void);
 824 extern int SLtt_set_mouse_mode (int, int);
 825 extern void SLtt_set_alt_char_set (int);
 826 extern int SLtt_write_to_status_line (char *, int);
 827 extern void SLtt_disable_status_line (void);
 828 # ifdef REAL_UNIX_SYSTEM
 829    extern char *SLtt_tgetstr (char *);
 830    extern int SLtt_tgetnum (char *);
 831    extern int SLtt_tgetflag (char *);
 832    extern char *SLtt_tigetent (char *);
 833    extern char *SLtt_tigetstr (char *, char **);
 834    extern int SLtt_tigetnum (char *, char **);
 835 # endif
 836 #endif
 837
 838 extern SLtt_Char_Type SLtt_get_color_object (int);
 839 extern void SLtt_set_color_object (int, SLtt_Char_Type);
 840 extern void SLtt_set_color (int, char *, char *, char *);
 841 extern void SLtt_set_mono (int, char *, SLtt_Char_Type);
 842 extern void SLtt_add_color_attribute (int, SLtt_Char_Type);
 843 extern void SLtt_set_color_fgbg (int, SLtt_Char_Type, SLtt_Char_Type);
 844
 845 /*}}}*/
 846
 847 /*{{{ SLang Preprocessor Interface */
 848
 849 typedef struct
 850 {
 851    int this_level;
 852    int exec_level;
 853    int prev_exec_level;
 854    char preprocess_char;
 855    char comment_char;
 856    unsigned char flags;
 857 #define SLPREP_BLANK_LINES_OK   1
 858 #define SLPREP_COMMENT_LINES_OK 2
 859 }
 860 SLPreprocess_Type;
 861
 862 extern int SLprep_open_prep (SLPreprocess_Type *);
 863 extern void SLprep_close_prep (SLPreprocess_Type *);
 864 extern int SLprep_line_ok (char *, SLPreprocess_Type *);
 865    extern int SLdefine_for_ifdef (char *);
 866    /* Adds a string to the SLang #ifdef preparsing defines. SLang already
 867       defines MSDOS, UNIX, and VMS on the appropriate system. */
 868 extern int (*SLprep_exists_hook) (char *, char);
 869
 870
 871 /*}}}*/
 872
 873 /*{{{ SLsmg Screen Management Functions */
 874
 875 #include <stdarg.h>
 876 extern void SLsmg_fill_region (int, int, int, int, unsigned char);
 877 #ifndef pc_system
 878 extern void SLsmg_set_char_set (int);
 879 extern int SLsmg_Scroll_Hash_Border;
 880 #endif
 881 extern void SLsmg_suspend_smg (void);
 882 extern void SLsmg_resume_smg (void);
 883 extern void SLsmg_erase_eol (void);
 884 extern void SLsmg_gotorc (int, int);
 885 extern void SLsmg_erase_eos (void);
 886 extern void SLsmg_reverse_video (void);
 887 extern void SLsmg_set_color (int);
 888 extern void SLsmg_normal_video (void);
 889 extern void SLsmg_printf (char *, ...);
 890 extern void SLsmg_vprintf (char *, va_list);
 891 extern void SLsmg_write_string (char *);
 892 extern void SLsmg_write_nstring (char *, int);
 893 extern void SLsmg_write_char (char);
 894 extern void SLsmg_write_nchars (char *, int);
 895 extern void SLsmg_write_wrapped_string (char *, int, int, int, int, int);
 896 extern void SLsmg_cls (void);
 897 extern void SLsmg_refresh (void);
 898 extern void SLsmg_touch_lines (int, int);
 899 extern int SLsmg_init_smg (void);
 900 extern void SLsmg_reset_smg (void);
 901 extern unsigned short SLsmg_char_at(void);
 902 extern void SLsmg_set_screen_start (int *, int *);
 903 extern void SLsmg_draw_hline (int);
 904 extern void SLsmg_draw_vline (int);
 905 extern void SLsmg_draw_object (int, int, unsigned char);
 906 extern void SLsmg_draw_box (int, int, int, int);
 907 extern int SLsmg_get_column(void);
 908 extern int SLsmg_get_row(void);
 909 extern void SLsmg_forward (int);
 910 extern void SLsmg_write_color_chars (unsigned short *, unsigned int);
 911 extern unsigned int SLsmg_read_raw (unsigned short *, unsigned int);
 912 extern unsigned int SLsmg_write_raw (unsigned short *, unsigned int);
 913
 914 extern int SLsmg_Display_Eight_Bit;
 915 extern int SLsmg_Tab_Width;
 916 extern int SLsmg_Newline_Moves;
 917 extern int SLsmg_Backspace_Moves;
 918
 919 #ifdef pc_system
 920 # define SLSMG_HLINE_CHAR       0xC4
 921 # define SLSMG_VLINE_CHAR       0xB3
 922 # define SLSMG_ULCORN_CHAR      0xDA
 923 # define SLSMG_URCORN_CHAR      0xBF
 924 # define SLSMG_LLCORN_CHAR      0xC0
 925 # define SLSMG_LRCORN_CHAR      0xD9
 926 # define SLSMG_RTEE_CHAR        0xB4
 927 # define SLSMG_LTEE_CHAR        0xC3
 928 # define SLSMG_UTEE_CHAR        0xC2
 929 # define SLSMG_DTEE_CHAR        0xC1
 930 # define SLSMG_PLUS_CHAR        0xC5
 931 /* There are several to choose from: 0xB0, 0xB1, and 0xB2 */
 932 # define SLSMG_CKBRD_CHAR       0xB0
 933 #else
 934 # define SLSMG_HLINE_CHAR       'q'
 935 # define SLSMG_VLINE_CHAR       'x'
 936 # define SLSMG_ULCORN_CHAR      'l'
 937 # define SLSMG_URCORN_CHAR      'k'
 938 # define SLSMG_LLCORN_CHAR      'm'
 939 # define SLSMG_LRCORN_CHAR      'j'
 940 # define SLSMG_CKBRD_CHAR       'a'
 941 # define SLSMG_RTEE_CHAR        'u'
 942 # define SLSMG_LTEE_CHAR        't'
 943 # define SLSMG_UTEE_CHAR        'w'
 944 # define SLSMG_DTEE_CHAR        'v'
 945 # define SLSMG_PLUS_CHAR        'n'
 946 #endif
 947
 948 #ifndef pc_system
 949 # define SLSMG_COLOR_BLACK              0x000000
 950 # define SLSMG_COLOR_RED                0x000001
 951 # define SLSMG_COLOR_GREEN              0x000002
 952 # define SLSMG_COLOR_BROWN              0x000003
 953 # define SLSMG_COLOR_BLUE               0x000004
 954 # define SLSMG_COLOR_MAGENTA            0x000005
 955 # define SLSMG_COLOR_CYAN               0x000006
 956 # define SLSMG_COLOR_LGRAY              0x000007
 957 # define SLSMG_COLOR_GRAY               0x000008
 958 # define SLSMG_COLOR_BRIGHT_RED         0x000009
 959 # define SLSMG_COLOR_BRIGHT_GREEN       0x00000A
 960 # define SLSMG_COLOR_BRIGHT_BROWN       0x00000B
 961 # define SLSMG_COLOR_BRIGHT_BLUE        0x00000C
 962 # define SLSMG_COLOR_BRIGHT_CYAN        0x00000D
 963 # define SLSMG_COLOR_BRIGHT_MAGENTA     0x00000E
 964 # define SLSMG_COLOR_BRIGHT_WHITE       0x00000F
 965 #endif
 966
 967 /*}}}*/
 968
 969 /*{{{ SLang Keypad Interface */
 970
 971 #define SL_KEY_ERR              0xFFFF
 972
 973 #define SL_KEY_UP               0x101
 974 #define SL_KEY_DOWN             0x102
 975 #define SL_KEY_LEFT             0x103
 976 #define SL_KEY_RIGHT            0x104
 977 #define SL_KEY_PPAGE            0x105
 978 #define SL_KEY_NPAGE            0x106
 979 #define SL_KEY_HOME             0x107
 980 #define SL_KEY_END              0x108
 981 #define SL_KEY_A1               0x109
 982 #define SL_KEY_A3               0x10A
 983 #define SL_KEY_B2               0x10B
 984 #define SL_KEY_C1               0x10C
 985 #define SL_KEY_C3               0x10D
 986 #define SL_KEY_REDO             0x10E
 987 #define SL_KEY_UNDO             0x10F
 988 #define SL_KEY_BACKSPACE        0x110
 989 #define SL_KEY_ENTER            0x111
 990 #define SL_KEY_IC               0x112
 991 #define SL_KEY_DELETE           0x113
 992
 993 #define SL_KEY_F0               0x200
 994 #define SL_KEY_F(X)             (SL_KEY_F0 + X)
 995
 996 /* I do not intend to use keysymps > 0x1000.  Applications can use those. */
 997 /* Returns 0 upon success or -1 upon error. */
 998 int SLkp_define_keysym (char *, unsigned int);
 999
1000 /* This function must be called AFTER SLtt_get_terminfo and not before. */
1001 extern int SLkp_init (void);
1002
1003 /* This function uses SLang_getkey and assumes that what ever initialization
1004  * is required for SLang_getkey has been performed.
1005  */
1006 extern int SLkp_getkey (void);
1007
1008 /*}}}*/
1009
1010 /*{{{ SLang Scroll Interface */
1011
1012 typedef struct _SLscroll_Type
1013 {
1014    struct _SLscroll_Type *next;
1015    struct _SLscroll_Type *prev;
1016    unsigned int flags;
1017 }
1018 SLscroll_Type;
1019
1020 typedef struct
1021 {
1022    unsigned int flags;
1023    SLscroll_Type *top_window_line;   /* list element at top of window */
1024    SLscroll_Type *bot_window_line;   /* list element at bottom of window */
1025    SLscroll_Type *current_line;    /* current list element */
1026    SLscroll_Type *lines;               /* first list element */
1027    unsigned int nrows;                 /* number of rows in window */
1028    unsigned int hidden_mask;           /* applied to flags in SLscroll_Type */
1029    unsigned int line_num;              /* current line number (visible) */
1030    unsigned int num_lines;             /* total number of lines (visible) */
1031    unsigned int window_row;            /* row of current_line in window */
1032    unsigned int border;                /* number of rows that form scroll border */
1033    int cannot_scroll;                  /* should window scroll or recenter */
1034 }
1035 SLscroll_Window_Type;
1036
1037 extern int SLscroll_find_top (SLscroll_Window_Type *);
1038 extern int SLscroll_find_line_num (SLscroll_Window_Type *);
1039 extern unsigned int SLscroll_next_n (SLscroll_Window_Type *, unsigned int);
1040 extern unsigned int SLscroll_prev_n (SLscroll_Window_Type *, unsigned int);
1041 extern int SLscroll_pageup (SLscroll_Window_Type *);
1042 extern int SLscroll_pagedown (SLscroll_Window_Type *);
1043
1044 /*}}}*/
1045
1046 /*{{{ Signal Routines */
1047
1048 typedef void SLSig_Fun_Type (int);
1049 extern SLSig_Fun_Type *SLsignal (int, SLSig_Fun_Type *);
1050 extern SLSig_Fun_Type *SLsignal_intr (int, SLSig_Fun_Type *);
1051 #ifndef pc_system
1052 extern int SLsig_block_signals (void);
1053 extern int SLsig_unblock_signals (void);
1054 #endif
1055 /*}}}*/
1056
1057 /*{{{ Interpreter Macro Definitions */
1058
1059 /* This value is a main_type just like the other main_types defined
1060  * near the definition of SLang_Name_Type.  Applications should avoid using
1061  * this so if you do not understands its role, do not use it.
1062  */
1063 #define SLANG_DATA              0x30           /* real objects which may be destroyed */
1064
1065 /* Subtypes */
1066
1067 /* The definitions here are for objects that may be on the run-time stack.
1068  * They are actually sub_types of literal and data main_types.
1069  */
1070 #define VOID_TYPE       1
1071 #define INT_TYPE        2
1072 #ifdef FLOAT_TYPE
1073 # undef FLOAT_TYPE
1074 # define FLOAT_TYPE     3
1075 #endif
1076 #define CHAR_TYPE       4
1077 #define INTP_TYPE       5
1078 /* An object of INTP_TYPE should never really occur on the stack.  Rather,
1079  * the integer to which it refers will be there instead.  It is defined here
1080  * because it is a valid type for MAKE_VARIABLE.
1081  */
1082
1083 #define SLANG_OBJ_TYPE  6
1084 /* SLANG_OBJ_TYPE refers to an object on the stack that is a pointer to
1085  * some other object.
1086  */
1087
1088 #if 0
1089 /* This is not ready yet.  */
1090 # define SLANG_NOOP     9
1091 #endif
1092
1093 /* Everything above string should correspond to a pointer in the object
1094  * structure.  See do_binary (slang.c) for exploitation of this fact.
1095  */
1096 #define STRING_TYPE     10
1097 /* Array type MUST be the smallest number for SLuser_Object_Type structs */
1098 #define ARRAY_TYPE      20
1099 /* I am reserving values greater than or equal to user applications.  The
1100  * first 99 are used for S-Lang.
1101  */
1102
1103
1104 /* Binary and Unary Subtypes */
1105 /* Since the application can define new types and can overload the binary
1106  * and unary operators, these definitions must be present in this file.
1107  */
1108 #define SLANG_PLUS      1
1109 #define SLANG_MINUS     2
1110 #define SLANG_TIMES     3
1111 #define SLANG_DIVIDE    4
1112 #define SLANG_EQ                5
1113 #define SLANG_NE                6
1114 #define SLANG_GT                7
1115 #define SLANG_GE                8
1116 #define SLANG_LT                9
1117 #define SLANG_LE                10
1118
1119 /* UNARY subtypes  (may be overloaded) */
1120 #define SLANG_ABS       11
1121 #define SLANG_SIGN      12
1122 #define SLANG_SQR       13
1123 #define SLANG_MUL2      14
1124 #define SLANG_CHS       15
1125
1126 /* error codes, severe errors are less than 0 */
1127 #define SL_INVALID_PARM         -6
1128 #define SL_MALLOC_ERROR         -5
1129 #define INTERNAL_ERROR          -4
1130 #define UNKNOWN_ERROR           -3
1131 #define STACK_OVERFLOW          -1
1132 #define STACK_UNDERFLOW         -2
1133 #define INTRINSIC_ERROR         1
1134 /* Intrinsic error is an error generated by intrinsic functions */
1135 #define USER_BREAK              2
1136 #define UNDEFINED_NAME          3
1137 #define SYNTAX_ERROR            4
1138 #define DUPLICATE_DEFINITION    5
1139 #define TYPE_MISMATCH           6
1140 #define READONLY_ERROR          7
1141 #define DIVIDE_ERROR            8
1142 /* object could not be opened */
1143 #define SL_OBJ_NOPEN            9
1144 /* unknown object */
1145 #define SL_OBJ_UNKNOWN          10
1146
1147 extern char *SLang_Error_Message;
1148
1149 extern void SLadd_name(char *, long, unsigned char, unsigned char);
1150 extern void SLadd_at_handler (long *, char *);
1151
1152 #define SLANG_MAKE_ARGS(out, in) ((unsigned char)(out) | ((unsigned short) (in) << 4))
1153
1154 #ifdef SLANG_STATS
1155
1156 #define MAKE_INTRINSIC(n, f, out, in)        \
1157     {0, n, (out | (in << 4)), SLANG_INTRINSIC, (long) f}
1158
1159 #define MAKE_VARIABLE(n, v, t, r)     \
1160     {0, n, t, (SLANG_IVARIABLE + r), (long) v}
1161
1162 #else
1163 #define MAKE_INTRINSIC(n, f, out, in)        \
1164     {n, (out | (in << 4)), SLANG_INTRINSIC, (long) f}
1165
1166 #define MAKE_VARIABLE(n, v, t, r)     \
1167     {n, t, (SLANG_IVARIABLE + r), (long) v}
1168 #endif
1169
1170 #define SLANG_END_TABLE  MAKE_INTRINSIC("", 0, 0, 0)
1171
1172
1173 /*}}}*/
1174
1175 /*{{{ Upper/Lowercase Functions */
1176
1177 extern void SLang_define_case(int *, int *);
1178 extern void SLang_init_case_tables (void);
1179
1180 extern unsigned char Chg_UCase_Lut[256];
1181 extern unsigned char Chg_LCase_Lut[256];
1182 #define UPPER_CASE(x) (Chg_UCase_Lut[(unsigned char) (x)])
1183 #define LOWER_CASE(x) (Chg_LCase_Lut[(unsigned char) (x)])
1184 #define CHANGE_CASE(x) (((x) == Chg_LCase_Lut[(unsigned char) (x)]) ?\
1185                         Chg_UCase_Lut[(unsigned char) (x)] : Chg_LCase_Lut[(unsigned char) (x)])
1186
1187
1188 /*}}}*/
1189
1190 /*{{{ Regular Expression Interface */
1191
1192 typedef struct
1193 {
1194    unsigned char *pat;                 /* regular expression pattern */
1195    unsigned char *buf;                 /* buffer for compiled regexp */
1196    unsigned int buf_len;               /* length of buffer */
1197    int case_sensitive;                 /* 1 if match is case sensitive  */
1198    int must_match;                     /* 1 if line must contain substring */
1199    int must_match_bol;                 /* true if it must match beginning of line */
1200    unsigned char must_match_str[16];   /* 15 char null term substring */
1201    int osearch;                        /* 1 if ordinary search suffices */
1202    unsigned int min_length;            /* minimum length the match must be */
1203    int beg_matches[10];                /* offset of start of \( */
1204    unsigned int end_matches[10];       /* length of nth submatch
1205                                         * Note that the entire match corresponds
1206                                         * to \0
1207                                         */
1208    int offset;                         /* offset to be added to beg_matches */
1209 } SLRegexp_Type;
1210
1211 extern unsigned char *SLang_regexp_match(unsigned char *,
1212                                          unsigned int,
1213                                          SLRegexp_Type *);
1214 extern int SLang_regexp_compile (SLRegexp_Type *);
1215 extern char *SLregexp_quote_string (char *, char *, unsigned int);
1216
1217
1218 /*}}}*/
1219
1220 /*{{{ SLang Command Interface */
1221
1222 #define SLCMD_MAX_ARGS 10
1223 struct _SLcmd_Cmd_Type; /* Pre-declaration is needed below */
1224 typedef struct
1225 {
1226    struct _SLcmd_Cmd_Type *table;
1227    int argc;
1228    char *string_args[SLCMD_MAX_ARGS];
1229    int int_args[SLCMD_MAX_ARGS];
1230    float64 float_args[SLCMD_MAX_ARGS];
1231    unsigned char arg_type[SLCMD_MAX_ARGS];
1232 } SLcmd_Cmd_Table_Type;
1233
1234
1235 typedef struct _SLcmd_Cmd_Type
1236 {
1237    int (*cmdfun)(int, SLcmd_Cmd_Table_Type *);
1238    char cmd[32];
1239    char arg_type[SLCMD_MAX_ARGS];
1240 } SLcmd_Cmd_Type;
1241
1242 extern int SLcmd_execute_string (char *, SLcmd_Cmd_Table_Type *);
1243
1244 /*}}}*/
1245
1246 /*{{{ SLang Search Interface */
1247
1248 typedef struct
1249 {
1250    int cs;                             /* case sensitive */
1251    unsigned char key[256];
1252    int ind[256];
1253    int key_len;
1254    int dir;
1255 } SLsearch_Type;
1256
1257 extern int SLsearch_init (char *, int, int, SLsearch_Type *);
1258 /* This routine must first be called before any search can take place.
1259  * The second parameter specifies the direction of the search: greater than
1260  * zero for a forwrd search and less than zero for a backward search.  The
1261  * third parameter specifies whether the search is case sensitive or not.
1262  * The last parameter is a pointer to a structure that is filled by this
1263  * function and it is this structure that must be passed to SLsearch.
1264  */
1265
1266 unsigned char *SLsearch (unsigned char *, unsigned char *, SLsearch_Type *);
1267 /* To use this routine, you must first call 'SLsearch_init'.  Then the first
1268  * two parameters p1 and p2 serve to define the region over which the search
1269  * is to take place.  The third parameter is the structure that was previously
1270  * initialized by SLsearch_init.
1271  *
1272  * The routine returns a pointer to the match if found otherwise it returns
1273  * NULL.
1274  */
1275
1276 /*}}}*/
1277
1278 #if 0
1279 {
1280 #endif
1281 #ifdef __cplusplus
1282 }
1283 #endif
1284
1285 #endif  /* _DAVIS_SLANG_H_ */