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Diffstat (limited to '')
| -rw-r--r-- | plug-ins/script-fu/tinyscheme/scheme-private.h | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/plug-ins/script-fu/tinyscheme/scheme-private.h b/plug-ins/script-fu/tinyscheme/scheme-private.h new file mode 100644 index 0000000..89840c2 --- /dev/null +++ b/plug-ins/script-fu/tinyscheme/scheme-private.h @@ -0,0 +1,227 @@ +/* scheme-private.h */ + +#ifndef _SCHEME_PRIVATE_H +#define _SCHEME_PRIVATE_H + +#include "scheme.h" +/*------------------ Ugly internals -----------------------------------*/ +/*------------------ Of interest only to FFI users --------------------*/ + +enum scheme_port_kind { + port_free=0, + port_file=1, + port_string=2, + port_srfi6=4, + port_input=16, + port_output=32, + port_saw_EOF=64 +}; + +typedef struct port { + unsigned char kind; + union { + struct { + FILE *file; + int closeit; +#if SHOW_ERROR_LINE + int curr_line; + char *filename; +#endif + } stdio; + struct { + char *start; + char *past_the_end; + char *curr; + } string; + } rep; +} port; + +/* cell structure */ +struct cell { + unsigned int _flag; + union { + struct { + char *_svalue; + int _length; + } _string; + num _number; + port *_port; + foreign_func _ff; + struct { + struct cell *_car; + struct cell *_cdr; + } _cons; + } _object; +}; + +struct scheme { +/* arrays for segments */ +func_alloc malloc; +func_dealloc free; + +/* return code */ +int retcode; +int tracing; + + +#ifndef CELL_SEGSIZE +#define CELL_SEGSIZE 25000 /* # of cells in one segment */ +#endif +#ifndef CELL_NSEGMENT +#define CELL_NSEGMENT 50 /* # of segments for cells */ +#endif +char *alloc_seg[CELL_NSEGMENT]; +pointer cell_seg[CELL_NSEGMENT]; +int last_cell_seg; + +/* We use 5 registers. */ +pointer args; /* register for arguments of function */ +pointer envir; /* stack register for current environment */ +pointer code; /* register for current code */ +pointer dump; /* stack register for next evaluation */ +pointer foreign_error; /* used for foreign functions to signal an error */ + +int interactive_repl; /* are we in an interactive REPL? */ +int print_output; /* set to 1 to print results and error messages */ + +struct cell _sink; +pointer sink; /* when mem. alloc. fails */ +struct cell _NIL; +pointer NIL; /* special cell representing empty cell */ +struct cell _HASHT; +pointer T; /* special cell representing #t */ +struct cell _HASHF; +pointer F; /* special cell representing #f */ +struct cell _EOF_OBJ; +pointer EOF_OBJ; /* special cell representing end-of-file object */ +pointer oblist; /* pointer to symbol table */ +pointer global_env; /* pointer to global environment */ + +pointer c_nest; /* stack for nested calls from C */ + +/* global pointers to special symbols */ +pointer LAMBDA; /* pointer to syntax lambda */ +pointer QUOTE; /* pointer to syntax quote */ + +pointer QQUOTE; /* pointer to symbol quasiquote */ +pointer UNQUOTE; /* pointer to symbol unquote */ +pointer UNQUOTESP; /* pointer to symbol unquote-splicing */ +pointer FEED_TO; /* => */ +pointer COLON_HOOK; /* *colon-hook* */ +pointer ERROR_HOOK; /* *error-hook* */ +pointer SHARP_HOOK; /* *sharp-hook* */ +pointer COMPILE_HOOK; /* *compile-hook* */ + +pointer free_cell; /* pointer to top of free cells */ +long fcells; /* # of free cells */ + +pointer inport; +pointer outport; +pointer save_inport; +pointer loadport; + +#ifndef MAXFIL +#define MAXFIL 64 +#endif +port load_stack[MAXFIL]; /* Stack of open files for port -1 (LOADing) */ +int nesting_stack[MAXFIL]; +int file_i; +int nesting; + +char gc_verbose; /* if gc_verbose is not zero, print gc status */ +char no_memory; /* Whether mem. alloc. has failed */ + +#ifndef LINESIZE +#define LINESIZE 1024 +#endif +char linebuff[LINESIZE]; +#ifndef STRBUFFSIZE +#define STRBUFFSIZE 1024 +#endif +char strbuff[STRBUFFSIZE]; + +FILE *tmpfp; +int tok; +int print_flag; +pointer value; +int op; + +void *ext_data; /* For the benefit of foreign functions */ +long gensym_cnt; + +struct scheme_interface *vptr; +void *dump_base; /* pointer to base of allocated dump stack */ +int dump_size; /* number of frames allocated for dump stack */ + +gunichar backchar[2]; +int bc_flag; +}; + +/* operator code */ +enum scheme_opcodes { +#define _OP_DEF(A,B,C,D,E,OP) OP, +#include "opdefines.h" + OP_MAXDEFINED +}; + +#ifdef __cplusplus +extern "C" { +#endif + +#define cons(sc,a,b) _cons(sc,a,b,0) +#define immutable_cons(sc,a,b) _cons(sc,a,b,1) + +int is_string(pointer p); +char *string_value(pointer p); +int is_number(pointer p); +num nvalue(pointer p); +long ivalue(pointer p); +double rvalue(pointer p); +int is_integer(pointer p); +int is_real(pointer p); +int is_character(pointer p); +int string_length(pointer p); +gunichar charvalue(pointer p); +int is_vector(pointer p); + +int is_port(pointer p); +int is_inport(pointer p); +int is_outport(pointer p); + +int is_pair(pointer p); +pointer pair_car(pointer p); +pointer pair_cdr(pointer p); +pointer set_car(pointer p, pointer q); +pointer set_cdr(pointer p, pointer q); + +int is_symbol(pointer p); +char *symname(pointer p); +char *symkey(pointer p); +int hasprop(pointer p); + +int is_syntax(pointer p); +int is_proc(pointer p); +int is_foreign(pointer p); +char *syntaxname(pointer p); +int is_closure(pointer p); +int is_macro(pointer p); +pointer closure_code(pointer p); +pointer closure_env(pointer p); + +int is_continuation(pointer p); +int is_promise(pointer p); +int is_environment(pointer p); +int is_immutable(pointer p); +void setimmutable(pointer p); + +#ifdef __cplusplus +} +#endif + +#endif + +/* +Local variables: +c-file-style: "k&r" +End: +*/ |