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sexp.c
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/* sexp.c -- standalone sexp library implementation */
/* Copyright (c) 2009-2012 Alex Shinn. All rights reserved. */
/* BSD-style license: http://synthcode.com/license.txt */
#include "chibi/sexp.h"
/* optional huffman-compressed immediate symbols */
struct sexp_huff_entry {
unsigned char len;
unsigned short bits;
};
#if SEXP_USE_HUFF_SYMS
#include "chibi/sexp-hufftabs.h"
static struct sexp_huff_entry huff_table[] = {
#include "chibi/sexp-huff.h"
};
#endif
static int sexp_initialized_p = 0;
static const char sexp_separators[] = {
/* 1 2 3 4 5 6 7 8 9 a b c d e f */
0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, /* x0_ */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* x1_ */
1, 0, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, /* x2_ */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, /* x3_ */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* x4_ */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, /* x5_ */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* x6_ */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, /* x7_ */
};
static int digit_value (int c) {
return (((c)<='9') ? ((c) - '0') : ((sexp_tolower(c) - 'a') + 10));
}
static int hex_digit (int n) {
return ((n<=9) ? ('0' + n) : ('a' + n - 10));
}
static int is_precision_indicator(int c) {
return c=='d' || c=='D' || c=='e' || c=='E' || c=='f' || c=='F'
|| c=='l' || c=='L' || c=='s' || c=='S';
}
int sexp_is_separator(int c) {
return 0<c && c<0x80 && sexp_separators[c];
}
#if SEXP_USE_GLOBAL_SYMBOLS
sexp sexp_symbol_table[SEXP_SYMBOL_TABLE_SIZE];
#endif
#if ! SEXP_USE_UNSAFE_PUSH
sexp sexp_push_op(sexp ctx, sexp* loc, sexp x) {
sexp tmp = sexp_cons(ctx, x, *loc);
if (sexp_exceptionp(tmp)) return *loc;
*loc = tmp;
return tmp;
}
#endif
sexp sexp_alloc_tagged_aux(sexp ctx, size_t size, sexp_uint_t tag sexp_current_source_param) {
#if SEXP_USE_TRACK_ALLOC_BACKTRACE
int i;
void* trace[SEXP_BACKTRACE_SIZE + 1];
#endif
sexp res = (sexp) sexp_alloc(ctx, size);
if (res && ! sexp_exceptionp(res)) {
sexp_pointer_tag(res) = tag;
#if SEXP_USE_TRACK_ALLOC_SOURCE
sexp_pointer_source(res) = source;
#if SEXP_USE_TRACK_ALLOC_BACKTRACE
backtrace(trace, SEXP_BACKTRACE_SIZE + 1);
for (i=0; i<SEXP_BACKTRACE_SIZE; i++) res->backtrace[i] = trace[i+1];
#endif
#endif
#if SEXP_USE_HEADER_MAGIC
sexp_pointer_magic(res) = SEXP_POINTER_MAGIC;
#endif
}
return res;
}
#if SEXP_USE_OBJECT_BRACE_LITERALS
sexp sexp_write_simple_object (sexp ctx, sexp self, sexp_sint_t n, sexp obj, sexp writer, sexp out) {
sexp t, x;
sexp_gc_var1(args);
sexp_sint_t i, len, nulls=0;
i = sexp_pointer_tag(obj);
sexp_write_char(ctx, '{', out);
if (i >= sexp_context_num_types(ctx)) {
sexp_write_string(ctx, "invalid", out);
} else {
sexp_gc_preserve1(ctx, args);
t = sexp_object_type(ctx, obj);
sexp_write_string(ctx, sexp_string_data(sexp_type_name(t)), out);
sexp_write_char(ctx, ' ', out);
if (sexp_type_id(t) && sexp_truep(sexp_type_id(t))) {
sexp_write(ctx, sexp_type_id(t), out);
} else {
sexp_write_char(ctx, '#', out);
sexp_write(ctx, sexp_make_fixnum(sexp_type_tag(t)), out);
}
len = sexp_type_num_slots_of_object(t, obj);
args = sexp_list1(ctx, SEXP_FALSE);
for (i=0; i<len; i++) {
x = sexp_slot_ref(obj, i);
if (x) {
if (nulls)
while (--nulls) sexp_write_string(ctx, " #<null>", out);
sexp_write_char(ctx, ' ', out);
if (writer && sexp_applicablep(writer)) {
sexp_car(args) = x;
x = sexp_apply(ctx, writer, args);
if (sexp_exceptionp(x)) sexp_print_exception(ctx, x, out);
} else {
sexp_write(ctx, sexp_slot_ref(obj, i), out);
}
} else {
nulls++;
}
}
sexp_gc_release1(ctx);
}
sexp_write_char(ctx, '}', out);
return SEXP_VOID;
}
#else
#define sexp_write_simple_object NULL
#endif
sexp sexp_finalize_fileno (sexp ctx, sexp self, sexp_sint_t n, sexp fileno) {
if (sexp_fileno_openp(fileno) && !sexp_fileno_no_closep(fileno)) {
sexp_fileno_openp(fileno) = 0;
close(sexp_fileno_fd(fileno));
}
return SEXP_VOID;
}
sexp sexp_finalize_port (sexp ctx, sexp self, sexp_sint_t n, sexp port) {
sexp res = SEXP_VOID;
if (sexp_port_openp(port)) {
sexp_port_openp(port) = 0;
if (sexp_oportp(port)) sexp_flush_forced(ctx, port);
#ifndef PLAN9
if (sexp_filenop(sexp_port_fd(port))
&& sexp_fileno_openp(sexp_port_fd(port))) {
if (sexp_port_shutdownp(port)) {
/* shutdown the socket if requested */
if (sexp_iportp(port))
shutdown(sexp_port_fileno(port), sexp_oportp(port) ? SHUT_RDWR : SHUT_RD);
if (sexp_oportp(port))
shutdown(sexp_port_fileno(port), SHUT_WR);
}
if (!sexp_port_no_closep(port)) {
if (--sexp_fileno_count(sexp_port_fd(port)) == 0)
sexp_finalize_fileno(ctx, self, n, sexp_port_fd(port));
}
}
#endif
if (sexp_port_stream(port) && ! sexp_port_no_closep(port))
/* close the stream */
fclose(sexp_port_stream(port));
/* free the buffer if allocated */
if (sexp_port_buf(port) && sexp_oportp(port)
/* output string ports have list cookies */
&& (sexp_nullp(sexp_port_cookie(port)) || sexp_pairp(sexp_port_cookie(port)))
#if !SEXP_USE_STRING_STREAMS
&& !sexp_port_customp(port)
#endif
)
free(sexp_port_buf(port));
sexp_port_offset(port) = 0;
sexp_port_size(port) = 0;
}
return res;
}
#if SEXP_USE_DL
sexp sexp_finalize_dl (sexp ctx, sexp self, sexp_sint_t n, sexp dl) {
dlclose(sexp_dl_handle(dl));
return SEXP_VOID;
}
#endif
static struct sexp_type_struct _sexp_type_specs[] = {
{SEXP_OBJECT, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Object", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
{SEXP_TYPE, sexp_offsetof(type, name), 7+SEXP_USE_DL, 7+SEXP_USE_DL, 0, 0, sexp_sizeof(type), 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Type", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
{SEXP_FIXNUM, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Integer", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
{SEXP_NUMBER, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Number", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
{SEXP_CHAR, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Char", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
{SEXP_BOOLEAN, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Boolean", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
{SEXP_PAIR, sexp_offsetof(pair, car), 2, 3, 0, 0, sexp_sizeof(pair), 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Pair", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
{SEXP_SYMBOL, 0, 0, 0, 0, 0, sexp_sizeof(symbol)+1, sexp_offsetof(symbol, length), 1, 0, 0, 0, 0, 0, 0, (sexp)"Symbol", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
{SEXP_BYTES, 0, 0, 0, 0, 0, sexp_sizeof(bytes)+1, sexp_offsetof(bytes, length), 1, 0, 0, 0, 0, 0, 0, (sexp)"Byte-Vector", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
#if SEXP_USE_PACKED_STRINGS
{SEXP_STRING, 0, 0, 0, 0, 0, sexp_sizeof(string)+1, sexp_offsetof(string, length), 1, 0, 0, 0, 0, 0, 0, (sexp)"String", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
#else
{SEXP_STRING, sexp_offsetof(string, bytes), 1, 1, 0, 0, sexp_sizeof(string), 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"String", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
#endif
{SEXP_VECTOR, sexp_offsetof(vector, data), 0, 0, sexp_offsetof(vector, length), 1, sexp_sizeof(vector), sexp_offsetof(vector, length), sizeof(sexp), 0, 0, 0, 0, 0, 0, (sexp)"Vector", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
{SEXP_FLONUM, 0, 0, 0, 0, 0, sexp_sizeof(flonum), 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Flonum", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
{SEXP_BIGNUM, 0, 0, 0, 0, 0, sexp_sizeof(bignum), sexp_offsetof(bignum, length), sizeof(sexp_uint_t), 0, 0, 0, 0, 0, 0, (sexp)"Bignum", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
#if SEXP_USE_RATIOS
{SEXP_RATIO, sexp_offsetof(ratio, numerator), 2, 2, 0, 0, sexp_sizeof(ratio), 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Ratio", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
#endif
#if SEXP_USE_COMPLEX
{SEXP_COMPLEX, sexp_offsetof(complex, real), 2, 2, 0, 0, sexp_sizeof(complex), 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Complex", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
#endif
{SEXP_IPORT, sexp_offsetof(port, name), 3, 3, 0, 0, sexp_sizeof(port), 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Input-Port", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, SEXP_FINALIZE_PORT},
{SEXP_OPORT, sexp_offsetof(port, name), 3, 3, 0, 0, sexp_sizeof(port), 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Output-Port", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, SEXP_FINALIZE_PORT},
{SEXP_FILENO, 0, 0, 0, 0, 0, sexp_sizeof(fileno), 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"File-Descriptor", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, SEXP_FINALIZE_FILENO},
{SEXP_EXCEPTION, sexp_offsetof(exception, kind), 6, 6, 0, 0, sexp_sizeof(exception), 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Exception", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, (sexp)sexp_write_simple_object, NULL},
{SEXP_PROCEDURE, sexp_offsetof(procedure, bc), 2, 2, 0, 0, sexp_sizeof(procedure), 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Procedure", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
{SEXP_MACRO, sexp_offsetof(macro, proc), 3, 3, 0, 0, sexp_sizeof(macro), 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Macro", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
{SEXP_SYNCLO, sexp_offsetof(synclo, env), 3, 3, 0, 0, sexp_sizeof(synclo), 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Syntactic-Closure", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, (sexp)sexp_write_simple_object, NULL},
{SEXP_ENV, sexp_offsetof(env, parent), 3+SEXP_USE_RENAME_BINDINGS, 3+SEXP_USE_RENAME_BINDINGS, 0, 0, sexp_sizeof(env), 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Environment", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
{SEXP_BYTECODE, sexp_offsetof(bytecode, name), 3, 3, 0, 0, sexp_sizeof(bytecode), offsetof(struct sexp_struct, value.bytecode.length), 1, 0, 0, 0, 0, 0, 0, (sexp)"Bytecode", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
{SEXP_CORE, sexp_offsetof(core, name), 1, 1, 0, 0, sexp_sizeof(core), 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Core-Form", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
#if SEXP_USE_DL
{SEXP_DL, sexp_offsetof(dl, file), 1, 1, 0, 0, sexp_sizeof(dl), 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Dynamic-Library", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, SEXP_FINALIZE_DL},
#endif
{SEXP_OPCODE, sexp_offsetof(opcode, name), 11, 11, 0, 0, sexp_sizeof(opcode), 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Opcode", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
{SEXP_LAMBDA, sexp_offsetof(lambda, name), 11, 11, 0, 0, sexp_sizeof(lambda), 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Lambda", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, (sexp)sexp_write_simple_object, NULL},
{SEXP_CND, sexp_offsetof(cnd, test), 4, 4, 0, 0, sexp_sizeof(cnd), 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Conditional", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, (sexp)sexp_write_simple_object, NULL},
{SEXP_REF, sexp_offsetof(ref, name), 3, 3, 0, 0, sexp_sizeof(ref), 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Reference", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, (sexp)sexp_write_simple_object, NULL},
{SEXP_SET, sexp_offsetof(set, var), 3, 3, 0, 0, sexp_sizeof(set), 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Set!", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, (sexp)sexp_write_simple_object, NULL},
{SEXP_SEQ, sexp_offsetof(seq, ls), 2, 2, 0, 0, sexp_sizeof(seq), 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Sequence", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, (sexp)sexp_write_simple_object, NULL},
{SEXP_LIT, sexp_offsetof(lit, value), 2, 2, 0, 0, sexp_sizeof(lit), 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Literal", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, (sexp)sexp_write_simple_object, NULL},
{SEXP_STACK, sexp_offsetof(stack, data), 1, 1, sexp_offsetof(stack, top), 1, sexp_sizeof(stack), offsetof(struct sexp_struct, value.stack.length), sizeof(sexp), 0, 0, 0, 0, 0, 0, (sexp)"Stack", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
{SEXP_CONTEXT, sexp_offsetof(context, stack), 12+SEXP_USE_DL, 12+SEXP_USE_DL, 0, 0, sexp_sizeof(context), 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Context", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
{SEXP_CPOINTER, sexp_offsetof(cpointer, parent), 1, 0, 0, 0, sexp_sizeof(cpointer), sexp_offsetof(cpointer, length), 1, 0, 0, 0, 0, 0, 0, (sexp)"Cpointer", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
#if SEXP_USE_AUTO_FORCE
{SEXP_PROMISE, sexp_offsetof(promise, value), 1, 1, 0, 0, sexp_sizeof(promise), 0, 0, 0, 0, 0, 0, 0, 0, (sexp)"Promise", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
#endif
#if SEXP_USE_WEAK_REFERENCES
{SEXP_EPHEMERON, sexp_offsetof(lit, value), 0, 0, 0, 0, sizeof(sexp), 0, 0, sexp_offsetof(lit, value), 1, 0, 0, 1, 0, (sexp)"Ephemeron", SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, SEXP_FALSE, NULL, SEXP_FALSE, NULL, NULL},
#endif
};
#define SEXP_INIT_NUM_TYPES (SEXP_NUM_CORE_TYPES*2)
#if SEXP_USE_TYPE_DEFS
sexp sexp_register_type_op (sexp ctx, sexp self, sexp_sint_t n, sexp name,
sexp parent, sexp slots,
sexp fb, sexp felb, sexp flb, sexp flo, sexp fls,
sexp sb, sexp so, sexp sc, sexp w, sexp wb, sexp wo,
sexp ws, sexp we, sexp p, sexp_proc2 f) {
sexp *v1, *v2;
sexp_gc_var2(res, type);
sexp_uint_t i, len, num_types=sexp_context_num_types(ctx),
type_array_size=sexp_context_type_array_size(ctx);
sexp_gc_preserve2(ctx, res, type);
if (num_types >= SEXP_MAXIMUM_TYPES) {
res = sexp_user_exception(ctx, self, "register-type: exceeded maximum type limit", name);
} else if (! sexp_stringp(name)) {
res = sexp_type_exception(ctx, self, SEXP_STRING, name);
} else {
if (num_types >= type_array_size) {
len = type_array_size*2;
if (len > SEXP_MAXIMUM_TYPES) len = SEXP_MAXIMUM_TYPES;
res = sexp_make_vector(ctx, sexp_make_fixnum(len), SEXP_VOID);
if (sexp_exceptionp(res)) {
sexp_gc_release2(ctx);
return res;
}
v1 = sexp_vector_data(res);
v2 = sexp_vector_data(sexp_global(ctx, SEXP_G_TYPES));
for (i=0; i<num_types; i++)
v1[i] = v2[i];
sexp_global(ctx, SEXP_G_TYPES) = res;
}
sexp_type_by_index(ctx, num_types) = sexp_alloc_type(ctx, type, SEXP_TYPE);
type = sexp_type_by_index(ctx, num_types);
if (!sexp_exceptionp(type)) {
sexp_pointer_tag(type) = SEXP_TYPE;
sexp_type_tag(type) = num_types;
sexp_type_slots(type) = slots;
sexp_type_field_base(type) = sexp_unbox_fixnum(fb);
sexp_type_field_eq_len_base(type) = sexp_unbox_fixnum(felb);
sexp_type_field_len_base(type) = sexp_unbox_fixnum(flb);
sexp_type_field_len_off(type) = sexp_unbox_fixnum(flo);
sexp_type_field_len_scale(type) = sexp_unbox_fixnum(fls);
sexp_type_size_base(type) = sexp_unbox_fixnum(sb);
sexp_type_size_off(type) = sexp_unbox_fixnum(so);
sexp_type_size_scale(type) = sexp_unbox_fixnum(sc);
sexp_type_weak_base(type) = sexp_unbox_fixnum(w);
sexp_type_weak_len_base(type) = sexp_unbox_fixnum(wb);
sexp_type_weak_len_off(type) = sexp_unbox_fixnum(wo);
sexp_type_weak_len_scale(type) = sexp_unbox_fixnum(ws);
sexp_type_weak_len_extra(type) = sexp_unbox_fixnum(we);
sexp_type_name(type) = name;
sexp_type_getters(type) = SEXP_FALSE;
sexp_type_setters(type) = SEXP_FALSE;
sexp_type_finalize(type) = f;
sexp_type_id(type) = SEXP_FALSE;
#if SEXP_USE_DL
if (f) sexp_type_dl(type) = sexp_context_dl(ctx);
#endif
sexp_type_print(type) = p;
if (sexp_typep(parent)) {
len = sexp_vectorp(sexp_type_cpl(parent)) ? sexp_vector_length(sexp_type_cpl(parent)) : 1;
sexp_type_cpl(type) = sexp_make_vector(ctx, sexp_make_fixnum(len+1), SEXP_VOID);
if (sexp_vectorp(sexp_type_cpl(parent)))
memcpy(sexp_vector_data(sexp_type_cpl(type)),
sexp_vector_data(sexp_type_cpl(parent)),
len * sizeof(sexp));
else
sexp_vector_data(sexp_type_cpl(type))[len-1] = parent;
} else {
len = 0;
sexp_type_cpl(type) = sexp_make_vector(ctx, SEXP_ONE, SEXP_VOID);
}
sexp_vector_data(sexp_type_cpl(type))[len] = type;
sexp_type_depth(type) = len;
sexp_global(ctx, SEXP_G_NUM_TYPES) = sexp_make_fixnum(num_types + 1);
}
res = type;
}
sexp_gc_release2(ctx);
return res;
}
sexp sexp_register_simple_type_op (sexp ctx, sexp self, sexp_sint_t n, sexp name, sexp parent, sexp slots) {
short i, num_slots = sexp_unbox_fixnum(sexp_length(ctx, slots));
sexp type_size, num_slots_obj, cpl, tmp;
if (parent && sexp_typep(parent)) {
num_slots += sexp_unbox_fixnum(sexp_length(ctx, sexp_type_slots(parent)));
if (sexp_vectorp((cpl = sexp_type_cpl(parent))))
for (i=sexp_vector_length(cpl)-1; i>=0; i--) {
tmp = sexp_vector_ref(cpl, sexp_make_fixnum(i));
num_slots += sexp_unbox_fixnum(sexp_length(ctx, sexp_type_slots(tmp)));
}
}
num_slots_obj = sexp_make_fixnum(num_slots);
type_size = sexp_make_fixnum(sexp_sizeof_header + sizeof(sexp)*num_slots);
return
sexp_register_type(ctx, name, parent, slots,
sexp_make_fixnum(sexp_offsetof_slot0),
num_slots_obj, num_slots_obj, SEXP_ZERO, SEXP_ZERO,
type_size, SEXP_ZERO, SEXP_ZERO, SEXP_ZERO, SEXP_ZERO,
SEXP_ZERO, SEXP_ZERO, SEXP_ZERO,
sexp_type_print(sexp_type_by_index(ctx, SEXP_EXCEPTION)),
NULL);
}
#if SEXP_USE_OBJECT_BRACE_LITERALS
sexp sexp_lookup_type_op(sexp ctx, sexp self, sexp_sint_t n, sexp name, sexp id) {
int i;
sexp res;
const char* str;
sexp_assert_type(ctx, sexp_stringp, SEXP_STRING, name);
str = sexp_string_data(name);
if (sexp_fixnump(id)) {
i = sexp_unbox_fixnum(id);
if (i < sexp_context_num_types(ctx)
&& strcmp(str, sexp_string_data(sexp_type_name_by_index(ctx, i))) == 0)
return sexp_type_by_index(ctx, i);
else
return SEXP_FALSE;
}
for (i=sexp_context_num_types(ctx)-1; i>=0; i--)
if (strcmp(str, sexp_string_data(sexp_type_name_by_index(ctx, i))) == 0) {
res = sexp_type_by_index(ctx, i);
if (sexp_stringp(id)
&& !(sexp_stringp(sexp_type_id(res))
&& strcmp(sexp_string_data(id), sexp_string_data(sexp_type_id(res))) == 0))
return SEXP_FALSE;
return res;
}
return SEXP_FALSE;
}
#endif
sexp sexp_finalize_c_type (sexp ctx, sexp self, sexp_sint_t n, sexp obj) {
if (sexp_cpointer_freep(obj))
free(sexp_cpointer_value(obj));
return SEXP_VOID;
}
#else
#define sexp_num_types SEXP_NUM_CORE_TYPES
#endif
/****************************** contexts ******************************/
void sexp_init_context_globals (sexp ctx) {
sexp type, *vec, print=NULL;
int i;
sexp_context_globals(ctx)
= sexp_make_vector(ctx, sexp_make_fixnum(SEXP_G_NUM_GLOBALS), SEXP_VOID);
#if ! SEXP_USE_GLOBAL_SYMBOLS
sexp_global(ctx, SEXP_G_SYMBOLS) = sexp_make_vector(ctx, sexp_make_fixnum(SEXP_SYMBOL_TABLE_SIZE), SEXP_NULL);
#endif
sexp_global(ctx, SEXP_G_STRICT_P) = SEXP_FALSE;
#if SEXP_USE_FOLD_CASE_SYMS
sexp_global(ctx, SEXP_G_FOLD_CASE_P) = sexp_make_boolean(SEXP_DEFAULT_FOLD_CASE_SYMS);
#endif
#if ! SEXP_USE_BOEHM
sexp_global(ctx, SEXP_G_PRESERVATIVES) = SEXP_NULL;
#endif
#if SEXP_USE_WEAK_REFERENCES
sexp_global(ctx, SEXP_G_FILE_DESCRIPTORS) = SEXP_FALSE;
sexp_global(ctx, SEXP_G_NUM_FILE_DESCRIPTORS) = SEXP_ZERO;
#endif
sexp_global(ctx, SEXP_G_OOM_ERROR) = sexp_user_exception(ctx, SEXP_FALSE, "out of memory", SEXP_NULL);
sexp_global(ctx, SEXP_G_OOS_ERROR) = sexp_user_exception(ctx, SEXP_FALSE, "out of stack space", SEXP_NULL);
sexp_global(ctx, SEXP_G_ABI_ERROR) = sexp_user_exception(ctx, SEXP_FALSE, "incompatible ABI", SEXP_NULL);
sexp_global(ctx, SEXP_G_QUOTE_SYMBOL) = sexp_intern(ctx, "quote", -1);
sexp_global(ctx, SEXP_G_QUASIQUOTE_SYMBOL) = sexp_intern(ctx, "quasiquote", -1);
sexp_global(ctx, SEXP_G_UNQUOTE_SYMBOL) = sexp_intern(ctx, "unquote", -1);
sexp_global(ctx, SEXP_G_UNQUOTE_SPLICING_SYMBOL) = sexp_intern(ctx, "unquote-splicing", -1);
sexp_global(ctx, SEXP_G_CUR_IN_SYMBOL) = sexp_intern(ctx, "current-input-port", -1);
sexp_global(ctx, SEXP_G_CUR_OUT_SYMBOL) = sexp_intern(ctx, "current-output-port", -1);
sexp_global(ctx, SEXP_G_CUR_ERR_SYMBOL) = sexp_intern(ctx, "current-error-port", -1);
sexp_global(ctx, SEXP_G_INTERACTION_ENV_SYMBOL) = sexp_intern(ctx, "interaction-environment", -1);
sexp_global(ctx, SEXP_G_CONTINUABLE_SYMBOL) = sexp_intern(ctx, "continuable", -1);
sexp_global(ctx, SEXP_G_EMPTY_VECTOR) = sexp_alloc_type(ctx, vector, SEXP_VECTOR);
sexp_vector_length(sexp_global(ctx, SEXP_G_EMPTY_VECTOR)) = 0;
sexp_global(ctx, SEXP_G_NUM_TYPES) = sexp_make_fixnum(SEXP_NUM_CORE_TYPES);
sexp_global(ctx, SEXP_G_TYPES)
= sexp_make_vector(ctx, sexp_make_fixnum(SEXP_INIT_NUM_TYPES), SEXP_VOID);
vec = sexp_vector_data(sexp_global(ctx, SEXP_G_TYPES));
for (i=0; i<SEXP_NUM_CORE_TYPES; i++) {
type = sexp_alloc_type(ctx, type, SEXP_TYPE);
memcpy(&(type->value), &(_sexp_type_specs[i]), sizeof(_sexp_type_specs[0]));
vec[i] = type;
sexp_type_name(type) = sexp_c_string(ctx, (char*)sexp_type_name(type), -1);
if (sexp_type_print(type)) {
if (print && ((sexp_proc1)sexp_type_print(type) == sexp_opcode_func(print)))
sexp_type_print(type) = print;
else
sexp_type_print(type) = print = sexp_make_foreign(ctx, "sexp_write_simple_object", 3, 0, (sexp_proc1)sexp_type_print(type), NULL);
}
}
}
#if ! SEXP_USE_GLOBAL_HEAP
sexp sexp_bootstrap_context (sexp_uint_t size, sexp_uint_t max_size) {
sexp ctx;
sexp_heap heap;
struct sexp_struct dummy_ctx;
if (size < SEXP_MINIMUM_HEAP_SIZE) size = SEXP_INITIAL_HEAP_SIZE;
heap = sexp_make_heap(sexp_heap_align(size), sexp_heap_align(max_size));
if (!heap) return 0;
sexp_pointer_tag(&dummy_ctx) = SEXP_CONTEXT;
sexp_context_saves(&dummy_ctx) = NULL;
sexp_context_heap(&dummy_ctx) = heap;
ctx = sexp_alloc_type(&dummy_ctx, context, SEXP_CONTEXT);
if (!ctx || sexp_exceptionp(ctx)) {
sexp_free_heap(heap);
} else {
sexp_context_heap(ctx) = heap;
}
return ctx;
}
#endif
sexp sexp_make_context (sexp ctx, size_t size, size_t max_size) {
sexp_gc_var1(res);
if (ctx) sexp_gc_preserve1(ctx, res);
#if ! SEXP_USE_GLOBAL_HEAP
if (! ctx) {
res = sexp_bootstrap_context(size, max_size);
if (!res || sexp_exceptionp(res)) return res;
} else
#endif
{
res = sexp_alloc_type(ctx, context, SEXP_CONTEXT);
#if ! SEXP_USE_BOEHM && ! SEXP_USE_MALLOC
sexp_context_heap(res) = sexp_context_heap(ctx);
#endif
}
if (!res || sexp_exceptionp(res)) return res;
sexp_context_parent(res) = ctx;
sexp_context_name(res) = sexp_context_specific(res) = SEXP_FALSE;
sexp_context_saves(res) = NULL;
sexp_context_params(res) = SEXP_NULL;
sexp_context_last_fp(res) = 0;
sexp_context_tracep(res) = 0;
sexp_context_timeoutp(res) = 0;
sexp_context_tailp(res) = 1;
#if SEXP_USE_GREEN_THREADS
sexp_context_errorp(res) = 0;
sexp_context_event(res) = SEXP_FALSE;
sexp_context_refuel(res) = SEXP_DEFAULT_QUANTUM;
#endif
#if SEXP_USE_DL
sexp_context_dl(res) = ctx ? sexp_context_dl(ctx) : SEXP_FALSE;
#endif
if (ctx) {
sexp_context_globals(res) = sexp_context_globals(ctx);
sexp_context_dk(res) = sexp_context_dk(ctx);
sexp_gc_release1(ctx);
} else {
sexp_init_context_globals(res);
}
return res;
}
#if ! SEXP_USE_GLOBAL_HEAP
void sexp_destroy_context (sexp ctx) {
sexp_heap heap, tmp;
size_t sum_freed;
if (sexp_context_heap(ctx)) {
heap = sexp_context_heap(ctx);
sexp_markedp(ctx) = 1;
sexp_markedp(sexp_context_globals(ctx)) = 1;
sexp_mark(ctx, sexp_global(ctx, SEXP_G_TYPES));
sexp_finalize(ctx);
sexp_sweep(ctx, &sum_freed);
sexp_finalize(ctx);
sexp_context_heap(ctx) = NULL;
for ( ; heap; heap=tmp) {
tmp = heap->next;
sexp_free_heap(heap);
}
}
}
#endif
/***************************** exceptions *****************************/
sexp sexp_make_exception (sexp ctx, sexp kind, sexp message, sexp irritants,
sexp procedure, sexp source) {
sexp exn = sexp_alloc_type(ctx, exception, SEXP_EXCEPTION);
sexp_exception_kind(exn) = kind;
sexp_exception_message(exn) = message;
sexp_exception_irritants(exn) = irritants;
sexp_exception_procedure(exn) = procedure;
sexp_exception_source(exn) = source;
return exn;
}
sexp sexp_string_cat3 (sexp ctx, const char *pre, const char *mid, const char* suf) {
int plen=strlen(pre), mlen=strlen(mid), slen=strlen(suf);
char *s;
sexp str;
str = sexp_make_string(ctx, sexp_make_fixnum(plen+mlen+slen), SEXP_VOID);
memcpy(s=sexp_string_data(str), pre, plen);
memcpy(s+plen, mid, mlen);
memcpy(s+plen+mlen, suf, slen);
return str;
}
sexp sexp_user_exception (sexp ctx, sexp self, const char *ms, sexp ir) {
sexp res;
sexp_gc_var3(sym, str, irr);
sexp_gc_preserve3(ctx, sym, str, irr);
res = sexp_make_exception(ctx, sym = sexp_intern(ctx, "user", -1),
str = sexp_c_string(ctx, ms, -1),
((sexp_pairp(ir) || sexp_nullp(ir))
? ir : (irr = sexp_list1(ctx, ir))),
self, SEXP_FALSE);
sexp_gc_release3(ctx);
return res;
}
sexp sexp_file_exception (sexp ctx, sexp self, const char *ms, sexp ir) {
sexp_gc_var1(res);
sexp_gc_preserve1(ctx, res);
res = sexp_user_exception(ctx, self, ms, ir);
sexp_exception_kind(res) = sexp_intern(ctx, "file", -1);
sexp_gc_release1(ctx);
return res;
}
static sexp type_exception (sexp ctx, sexp self, sexp str, sexp obj, sexp src) {
sexp_gc_var2(res, sym);
sexp_gc_preserve2(ctx, res, sym);
sym = sexp_intern(ctx, "type", -1);
res = sexp_make_exception(ctx, sym, str, obj, self, src);
sexp_exception_irritants(res)=sexp_list1(ctx, sexp_exception_irritants(res));
sexp_gc_release2(ctx);
return res;
}
sexp sexp_xtype_exception (sexp ctx, sexp self, const char *msg, sexp obj) {
sexp_gc_var1(res);
sexp_gc_preserve1(ctx, res);
res = sexp_c_string(ctx, msg, -1);
res = type_exception(ctx, self, res, obj, SEXP_FALSE);
sexp_gc_release1(ctx);
return res;
}
sexp sexp_type_exception (sexp ctx, sexp self, sexp_uint_t type_id, sexp obj) {
sexp_gc_var1(res);
sexp_gc_preserve1(ctx, res);
res = sexp_string_cat3(ctx, "invalid type, expected ",
sexp_string_data(sexp_type_name_by_index(ctx, type_id)), "");
res = type_exception(ctx, self, res, obj, SEXP_FALSE);
sexp_gc_release1(ctx);
return res;
}
sexp sexp_range_exception (sexp ctx, sexp obj, sexp start, sexp end) {
sexp_gc_var2(res, msg);
sexp_gc_preserve2(ctx, res, msg);
msg = sexp_c_string(ctx, "bad index range", -1);
res = sexp_list2(ctx, start, end);
res = sexp_cons(ctx, obj, res);
res = sexp_make_exception(ctx, sexp_intern(ctx, "range", -1), msg, res,
SEXP_FALSE, SEXP_FALSE);
sexp_gc_release2(ctx);
return res;
}
sexp sexp_print_exception_op (sexp ctx, sexp self, sexp_sint_t n, sexp exn, sexp out) {
sexp_gc_var2(ls, tmp);
/* unwrap continuable exceptions */
if (sexp_exceptionp(exn)
&& sexp_exception_kind(exn) == sexp_global(ctx, SEXP_G_CONTINUABLE_SYMBOL)
&& sexp_exceptionp(sexp_exception_irritants(exn))) {
return sexp_print_exception_op(ctx, self, n, sexp_exception_irritants(exn), out);
}
sexp_gc_preserve2(ctx, ls, tmp);
if (! sexp_oportp(out))
out = tmp = sexp_make_output_port(ctx, stderr, SEXP_FALSE);
sexp_write_string(ctx, "ERROR", out);
if (sexp_exceptionp(exn)) {
if (sexp_exception_procedure(exn)) {
if (sexp_procedurep(sexp_exception_procedure(exn))) {
ls = sexp_bytecode_name(
sexp_procedure_code(sexp_exception_procedure(exn)));
if (ls && sexp_symbolp(ls)) {
sexp_write_string(ctx, " in ", out);
sexp_write(ctx, ls, out);
}
} else if (sexp_opcodep(sexp_exception_procedure(exn))) {
sexp_write_string(ctx, " in ", out);
sexp_write(ctx, sexp_opcode_name(sexp_exception_procedure(exn)), out);
}
}
ls = sexp_exception_source(exn);
if ((! (ls && sexp_pairp(ls)))
&& sexp_exception_procedure(exn)
&& sexp_procedurep(sexp_exception_procedure(exn)))
ls = sexp_bytecode_source(sexp_procedure_code(sexp_exception_procedure(exn)));
if (ls && sexp_pairp(ls)) {
if (sexp_fixnump(sexp_cdr(ls)) && (sexp_cdr(ls) >= SEXP_ZERO)) {
sexp_write_string(ctx, " on line ", out);
sexp_write(ctx, sexp_cdr(ls), out);
}
if (sexp_stringp(sexp_car(ls))) {
sexp_write_string(ctx, " of file ", out);
sexp_write_string(ctx, sexp_string_data(sexp_car(ls)), out);
}
}
sexp_write_string(ctx, ": ", out);
if (sexp_stringp(sexp_exception_message(exn)))
sexp_write_string(ctx, sexp_string_data(sexp_exception_message(exn)), out);
else
sexp_write(ctx, sexp_exception_message(exn), out);
if (sexp_exception_irritants(exn)
&& sexp_pairp(sexp_exception_irritants(exn))) {
if (sexp_nullp(sexp_cdr(sexp_exception_irritants(exn)))) {
sexp_write_string(ctx, ": ", out);
sexp_write(ctx, sexp_car(sexp_exception_irritants(exn)), out);
sexp_write_string(ctx, "\n", out);
} else {
sexp_write_string(ctx, "\n", out);
for (ls=sexp_exception_irritants(exn);
sexp_pairp(ls); ls=sexp_cdr(ls)) {
sexp_write_string(ctx, " ", out);
sexp_write(ctx, sexp_car(ls), out);
sexp_write_char(ctx, '\n', out);
}
}
} else {
sexp_write_char(ctx, '\n', out);
}
} else {
sexp_write_string(ctx, ": ", out);
if (sexp_stringp(exn))
sexp_write_string(ctx, sexp_string_data(exn), out);
else
sexp_write(ctx, exn, out);
sexp_write_char(ctx, '\n', out);
}
sexp_gc_release2(ctx);
return SEXP_VOID;
}
sexp sexp_read_error (sexp ctx, const char *msg, sexp ir, sexp port) {
sexp res;
sexp_gc_var4(sym, name, str, irr);
sexp_gc_preserve4(ctx, sym, name, str, irr);
name = (sexp_port_name(port) ? sexp_port_name(port) : SEXP_FALSE);
name = sexp_cons(ctx, name, sexp_make_fixnum(sexp_port_line(port)));
str = sexp_c_string(ctx, msg, -1);
irr = ((sexp_pairp(ir) || sexp_nullp(ir)) ? ir : sexp_list1(ctx, ir));
res = sexp_make_exception(ctx, sym = sexp_intern(ctx, "read", -1),
str, irr, SEXP_FALSE, name);
sexp_gc_release4(ctx);
return res;
}
sexp sexp_read_incomplete_error (sexp ctx, const char *msg, sexp ir, sexp port) {
sexp_gc_var1(res);
sexp_gc_preserve1(ctx, res);
res = sexp_read_error(ctx, msg, ir, port);
if (sexp_exceptionp(res))
sexp_exception_kind(res) = sexp_intern(ctx, "read-incomplete", -1);
sexp_gc_release1(ctx);
return res;
}
/*************************** list utilities ***************************/
sexp sexp_cons_op (sexp ctx, sexp self, sexp_sint_t n, sexp head, sexp tail) {
sexp pair = sexp_alloc_type(ctx, pair, SEXP_PAIR);
if (sexp_exceptionp(pair)) return pair;
sexp_car(pair) = head;
sexp_cdr(pair) = tail;
sexp_pair_source(pair) = SEXP_FALSE;
return pair;
}
sexp sexp_list2 (sexp ctx, sexp a, sexp b) {
sexp_gc_var1(res);
sexp_gc_preserve1(ctx, res);
res = sexp_cons(ctx, b, SEXP_NULL);
res = sexp_cons(ctx, a, res);
sexp_gc_release1(ctx);
return res;
}
sexp sexp_listp_op (sexp ctx, sexp self, sexp_sint_t n, sexp hare) {
sexp turtle;
if (! sexp_pairp(hare))
return sexp_make_boolean(sexp_nullp(hare));
turtle = hare;
hare = sexp_cdr(hare);
for ( ; sexp_pairp(hare); turtle=sexp_cdr(turtle)) {
if (hare == turtle) return SEXP_FALSE;
hare = sexp_cdr(hare);
if (sexp_pairp(hare)) hare = sexp_cdr(hare);
}
return sexp_make_boolean(sexp_nullp(hare));
}
sexp sexp_memq_op (sexp ctx, sexp self, sexp_sint_t n, sexp x, sexp ls) {
while (sexp_pairp(ls))
if (x == sexp_car(ls))
return ls;
else
ls = sexp_cdr(ls);
return SEXP_FALSE;
}
sexp sexp_assq_op (sexp ctx, sexp self, sexp_sint_t n, sexp x, sexp ls) {
while (sexp_pairp(ls))
if (sexp_pairp(sexp_car(ls)) && (x == sexp_caar(ls)))
return sexp_car(ls);
else
ls = sexp_cdr(ls);
return SEXP_FALSE;
}
sexp sexp_reverse_op (sexp ctx, sexp self, sexp_sint_t n, sexp ls) {
sexp_gc_var1(res);
sexp_gc_preserve1(ctx, res);
for (res=SEXP_NULL; sexp_pairp(ls); ls=sexp_cdr(ls))
res = sexp_cons(ctx, sexp_car(ls), res);
sexp_gc_release1(ctx);
return res;
}
sexp sexp_nreverse_op (sexp ctx, sexp self, sexp_sint_t n, sexp ls) {
sexp a, b, tmp;
if (ls == SEXP_NULL) return ls;
sexp_assert_type(ctx, sexp_pairp, SEXP_PAIR, ls);
b = ls;
a = sexp_cdr(ls);
sexp_cdr(b) = SEXP_NULL;
for ( ; sexp_pairp(a); b=a, a=tmp) {
tmp = sexp_cdr(a);
sexp_cdr(a) = b;
}
return b;
}
sexp sexp_copy_list_op (sexp ctx, sexp self, sexp_sint_t n, sexp ls) {
sexp tmp;
sexp_gc_var1(res);
if (! sexp_pairp(ls)) return ls;
sexp_gc_preserve1(ctx, res);
tmp = res = sexp_cons(ctx, sexp_car(ls), sexp_cdr(ls));
for (ls=sexp_cdr(ls); sexp_pairp(ls); ls=sexp_cdr(ls), tmp=sexp_cdr(tmp))
sexp_cdr(tmp) = sexp_cons(ctx, sexp_car(ls), sexp_cdr(ls));
sexp_gc_release1(ctx);
return res;
}
sexp sexp_append2_op (sexp ctx, sexp self, sexp_sint_t n, sexp a, sexp b) {
sexp_gc_var2(a1, b1);
sexp_gc_preserve2(ctx, a1, b1);
b1 = b;
for (a1=sexp_reverse(ctx, a); sexp_pairp(a1); a1=sexp_cdr(a1))
b1 = sexp_cons(ctx, sexp_car(a1), b1);
sexp_gc_release2(ctx);
return b1;
}
sexp sexp_length_op (sexp ctx, sexp self, sexp_sint_t n, sexp ls1) {
sexp ls2;
sexp_uint_t res = 1;
if (!sexp_pairp(ls1))
return SEXP_ZERO;
for (ls2=sexp_cdr(ls1); sexp_pairp(ls2) && sexp_pairp(sexp_cdr(ls2));
res+=2, ls1=sexp_cdr(ls1), ls2=sexp_cddr(ls2))
if (ls1 == ls2)
return SEXP_FALSE;
return sexp_make_fixnum(res + (sexp_pairp(ls2) ? 1 : 0));
}
sexp sexp_equalp_bound (sexp ctx, sexp self, sexp_sint_t n, sexp a, sexp b, sexp depth, sexp bound) {
sexp_uint_t left_size, right_size;
sexp_sint_t i, len;
sexp t, *p, *q, depth2;
char *p_left, *p_right, *q_left, *q_right;
loop:
if (a == b)
return bound;
else if ((!a || !sexp_pointerp(a)) || (!b || !sexp_pointerp(b))
|| (sexp_pointer_tag(a) != sexp_pointer_tag(b)))
return SEXP_FALSE;
/* a and b are both pointers of the same type */
#if SEXP_USE_BIGNUMS
if (sexp_pointer_tag(a) == SEXP_BIGNUM)
return !sexp_bignum_compare(a, b) ? bound : SEXP_FALSE;
#endif
#if SEXP_USE_FLONUMS && ! SEXP_USE_IMMEDIATE_FLONUMS
if (sexp_pointer_tag(a) == SEXP_FLONUM)
return sexp_flonum_eqv(a, b) ? bound : SEXP_FALSE;
#endif
/* check limits */
if (sexp_unbox_fixnum(bound) < 0 || sexp_unbox_fixnum(depth) < 0)
return bound;
depth2 = sexp_fx_sub(depth, SEXP_ONE);
bound = sexp_fx_sub(bound, SEXP_ONE);
t = sexp_object_type(ctx, a);
p_left = ((char*)a) + offsetof(struct sexp_struct, value);
p = (sexp*) (((char*)a) + sexp_type_field_base(t));
q_left = ((char*)b) + offsetof(struct sexp_struct, value);
q = (sexp*) (((char*)b) + sexp_type_field_base(t));
/* if no fields, the base is value (just past the header) */
if ((sexp)p == a) {p=(sexp*)p_left; q=(sexp*)q_left;}
/* check preliminary non-object data */
left_size = (char*)p - p_left;
if ((left_size > 0) && memcmp(p_left, q_left, left_size))
return SEXP_FALSE;
/* check trailing non-object data */
p_right = ((char*)p + sexp_type_num_slots_of_object(t,a)*sizeof(sexp));
right_size = ((char*)a + sexp_type_size_of_object(t, a)) - p_right;
if (right_size > 0) {
q_right = ((char*)q + sexp_type_num_slots_of_object(t,b)*sizeof(sexp));
if (right_size != ((char*)b + sexp_type_size_of_object(t, b)) - q_right)
return SEXP_FALSE;
if (memcmp(p_right, q_right, right_size))
return SEXP_FALSE;
}
/* left and right non-object data is the same, now check eq-object slots */
len = sexp_type_num_eq_slots_of_object(t, a);
if (len > 0) {
for (; len > 1; len--) {
a = p[len-1]; b = q[len-1];
if (a != b) {
if ((!a || !sexp_pointerp(a)) || (!b || !sexp_pointerp(b))
|| (sexp_pointer_tag(a) != sexp_pointer_tag(b)))
return SEXP_FALSE;
else break;
}
}
for (i=0; i<len-1; i++) {
bound = sexp_equalp_bound(ctx, self, n, p[i], q[i], depth2, bound);
if (sexp_not(bound)) return SEXP_FALSE;
}
/* tail-recurse on the last value (same depth) */
a = p[len-1]; b = q[len-1]; goto loop;
}
return bound;
}
sexp sexp_equalp_op (sexp ctx, sexp self, sexp_sint_t n, sexp a, sexp b) {
return sexp_make_boolean(
sexp_truep(sexp_equalp_bound(ctx, self, n, a, b,
sexp_make_fixnum(SEXP_DEFAULT_EQUAL_DEPTH),
sexp_make_fixnum(SEXP_DEFAULT_EQUAL_BOUND))));
}
/********************* strings, symbols, vectors **********************/
sexp sexp_flonump_op (sexp ctx, sexp self, sexp_sint_t n, sexp x) {
return sexp_make_boolean(sexp_flonump(x));
}
#if ! SEXP_USE_IMMEDIATE_FLONUMS
sexp sexp_make_flonum (sexp ctx, double f) {
sexp x = sexp_alloc_type(ctx, flonum, SEXP_FLONUM);
if (sexp_exceptionp(x)) return x;
sexp_flonum_value(x) = f;
return x;
}
#else
#if SEXP_64_BIT
float sexp_flonum_value (sexp x) {
union sexp_flonum_conv r;
r.bits = (sexp_uint_t)x >> 32;
return r.flonum;
}
sexp sexp_make_flonum (sexp ctx, float f) {
union sexp_flonum_conv x;
x.flonum = f;
return (sexp)(((sexp_uint_t)(x.bits) << 32) + SEXP_IFLONUM_TAG);
}
#endif
#endif
sexp sexp_make_bytes_op (sexp ctx, sexp self, sexp_sint_t n, sexp len, sexp i) {
sexp_sint_t clen = sexp_unbox_fixnum(len);
sexp s;
sexp_assert_type(ctx, sexp_fixnump, SEXP_FIXNUM, len);
if (clen < 0) return sexp_xtype_exception(ctx, self, "negative length", len);
s = sexp_alloc_atomic(ctx, sexp_sizeof(bytes)+clen+1);
if (sexp_exceptionp(s)) return s;
sexp_pointer_tag(s) = SEXP_BYTES;
#if SEXP_USE_HEADER_MAGIC
sexp_pointer_magic(s) = SEXP_POINTER_MAGIC;
#endif
sexp_bytes_length(s) = clen;
if (sexp_fixnump(i))
memset(sexp_bytes_data(s), sexp_unbox_fixnum(i), clen);
sexp_bytes_data(s)[clen] = '\0';
return s;
}
#if SEXP_USE_UTF8_STRINGS
int sexp_utf8_initial_byte_count (int c) {
if (c < 0xC0) return 1;
if (c < 0xE0) return 2;
return ((c>>4)&1)+3;
}
int sexp_utf8_char_byte_count (int c) {
if (c < 0x80) return 1;
if (c < 0x800) return 2;
if (c < 0x10000) return 3;
return 4;
}
sexp_uint_t sexp_string_utf8_length (unsigned char *p, long len) {
unsigned char *q = p+len;
sexp_uint_t i;
for (i=0; p<q; i++)
p += sexp_utf8_initial_byte_count(*p);
return i;
}
char* sexp_string_utf8_prev (unsigned char *p) {
while ((*--p)>>6 == 2)
;
return (char*)p;
}
sexp sexp_string_utf8_ref (sexp ctx, sexp str, sexp i) {
unsigned char *p=(unsigned char*)sexp_string_data(str) + sexp_unbox_fixnum(i);
if (*p < 0x80)
return sexp_make_character(*p);
else if ((*p < 0xC0) || (*p > 0xF7))
return sexp_user_exception(ctx, NULL, "string-ref: invalid utf8 byte", i);
else if (*p < 0xE0)
return sexp_make_character(((p[0]&0x3F)<<6) + (p[1]&0x3F));
else if (*p < 0xF0)
return sexp_make_character(((p[0]&0x1F)<<12) + ((p[1]&0x3F)<<6) + (p[2]&0x3F));
else
return sexp_make_character(((p[0]&0x0F)<<18) + ((p[1]&0x3F)<<12) + ((p[2]&0x3F)<<6) + (p[3]&0x3F));
}
void sexp_utf8_encode_char (unsigned char* p, int len, int c) {
switch (len) {
case 4: *p++ = (0xF0 + ((c)>>18)); *p++ = (0x80 + ((c>>12)&0x3F));
*p++ = (0x80 + ((c>>6)&0x3F)); *p = (0x80 + (c&0x3F)); break;
case 3: *p++ = (0xE0 + ((c)>>12)); *p++ = (0x80 + ((c>>6)&0x3F));
*p = (0x80 + (c&0x3F)); break;
case 2: *p++ = (0xC0 + ((c)>>6)); *p = (0x80 + (c&0x3F)); break;
default: *p = c; break;
}
}
sexp sexp_string_index_to_offset (sexp ctx, sexp self, sexp_sint_t n, sexp str, sexp index) {
sexp_sint_t i, j, limit;
unsigned char *p;