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