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julia_extensions.c
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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include "utf8proc.h"
#undef JL_DLLEXPORT /* avoid conflicting definition */
#include "flisp.h"
#ifdef __cplusplus
extern "C" {
#endif
#define _equal_wchar_(x, y, ctx) ((x) == (y))
#define _hash_wchar_(x, ctx) inthash((uint32_t) ((uintptr_t) (x)))
#include "htable.inc"
HTIMPL_R(wcharhash, _hash_wchar_, _equal_wchar_)
static int is_uws(uint32_t wc)
{
return (wc==9 || wc==10 || wc==11 || wc==12 || wc==13 || wc==32 ||
wc==133 || wc==160 || wc==5760 || wc==6158 || wc==8192 ||
wc==8193 || wc==8194 || wc==8195 || wc==8196 || wc==8197 ||
wc==8198 || wc==8199 || wc==8200 || wc==8201 || wc==8202 ||
wc==8232 || wc==8233 || wc==8239 || wc==8287 || wc==12288);
}
static int is_bom(uint32_t wc)
{
return wc == 0xFEFF;
}
static int safe_peekutf8(fl_context_t *fl_ctx, ios_t *s, uint32_t *pwc)
{
int result = ios_peekutf8(s, pwc);
if (result == 0)
lerror(fl_ctx, fl_ctx->IOError, "invalid UTF-8 sequence");
return result;
}
value_t fl_skipws(fl_context_t *fl_ctx, value_t *args, uint32_t nargs)
{
argcount(fl_ctx, "skip-ws", nargs, 2);
ios_t *s = fl_toiostream(fl_ctx, args[0], "skip-ws");
int newlines = (args[1]!=fl_ctx->F);
uint32_t wc=0;
value_t skipped = fl_ctx->F;
while (1) {
if (safe_peekutf8(fl_ctx, s, &wc) == IOS_EOF) {
ios_getutf8(s, &wc); // to set EOF flag if this is a true EOF
if (!ios_eof(s))
lerror(fl_ctx, symbol(fl_ctx, "error"), "incomplete character");
return fl_ctx->FL_EOF;
}
if (!ios_eof(s) && (is_uws(wc) || is_bom(wc)) && (newlines || wc!=10)) {
skipped = fl_ctx->T;
ios_getutf8(s, &wc);
}
else {
break;
}
}
return skipped;
}
static int is_wc_cat_id_start(uint32_t wc, utf8proc_category_t cat)
{
return (cat == UTF8PROC_CATEGORY_LU || cat == UTF8PROC_CATEGORY_LL ||
cat == UTF8PROC_CATEGORY_LT || cat == UTF8PROC_CATEGORY_LM ||
cat == UTF8PROC_CATEGORY_LO || cat == UTF8PROC_CATEGORY_NL ||
cat == UTF8PROC_CATEGORY_SC || // allow currency symbols
// other symbols, but not arrows or replacement characters
(cat == UTF8PROC_CATEGORY_SO && !(wc >= 0x2190 && wc <= 0x21FF) &&
wc != 0xfffc && wc != 0xfffd &&
wc != 0x233f && // notslash
wc != 0x00a6) || // broken bar
// math symbol (category Sm) whitelist
(wc >= 0x2140 && wc <= 0x2a1c &&
((wc >= 0x2140 && wc <= 0x2144) || // ⅀, ⅁, ⅂, ⅃, ⅄
wc == 0x223f || wc == 0x22be || wc == 0x22bf || // ∿, ⊾, ⊿
wc == 0x22a4 || wc == 0x22a5 || // ⊤ ⊥
(wc >= 0x2202 && wc <= 0x2233 &&
(wc == 0x2202 || wc == 0x2205 || wc == 0x2206 || // ∂, ∅, ∆
wc == 0x2207 || wc == 0x220e || wc == 0x220f || // ∇, ∎, ∏
wc == 0x2210 || wc == 0x2211 || // ∐, ∑
wc == 0x221e || wc == 0x221f || // ∞, ∟
wc >= 0x222b)) || // ∫, ∬, ∭, ∮, ∯, ∰, ∱, ∲, ∳
(wc >= 0x22c0 && wc <= 0x22c3) || // N-ary big ops: ⋀, ⋁, ⋂, ⋃
(wc >= 0x25F8 && wc <= 0x25ff) || // ◸, ◹, ◺, ◻, ◼, ◽, ◾, ◿
(wc >= 0x266f &&
(wc == 0x266f || wc == 0x27d8 || wc == 0x27d9 || // ♯, ⟘, ⟙
(wc >= 0x27c0 && wc <= 0x27c1) || // ⟀, ⟁
(wc >= 0x29b0 && wc <= 0x29b4) || // ⦰, ⦱, ⦲, ⦳, ⦴
(wc >= 0x2a00 && wc <= 0x2a06) || // ⨀, ⨁, ⨂, ⨃, ⨄, ⨅, ⨆
(wc >= 0x2a09 && wc <= 0x2a16) || // ⨉, ⨊, ⨋, ⨌, ⨍, ⨎, ⨏, ⨐, ⨑, ⨒, ⨓, ⨔, ⨕, ⨖
wc == 0x2a1b || wc == 0x2a1c)))) || // ⨛, ⨜
(wc >= 0x1d6c1 && // variants of \nabla and \partial
(wc == 0x1d6c1 || wc == 0x1d6db ||
wc == 0x1d6fb || wc == 0x1d715 ||
wc == 0x1d735 || wc == 0x1d74f ||
wc == 0x1d76f || wc == 0x1d789 ||
wc == 0x1d7a9 || wc == 0x1d7c3)) ||
// super- and subscript +-=()
(wc >= 0x207a && wc <= 0x207e) ||
(wc >= 0x208a && wc <= 0x208e) ||
// angle symbols
(wc >= 0x2220 && wc <= 0x2222) || // ∠, ∡, ∢
(wc >= 0x299b && wc <= 0x29af) || // ⦛, ⦜, ⦝, ⦞, ⦟, ⦠, ⦡, ⦢, ⦣, ⦤, ⦥, ⦦, ⦧, ⦨, ⦩, ⦪, ⦫, ⦬, ⦭, ⦮, ⦯
// Other_ID_Start
wc == 0x2118 || wc == 0x212E || // ℘, ℮
(wc >= 0x309B && wc <= 0x309C) || // katakana-hiragana sound marks
// bold-digits and double-struck digits
(wc >= 0x1D7CE && wc <= 0x1D7E1)); // 𝟎 through 𝟗 (inclusive), 𝟘 through 𝟡 (inclusive)
}
JL_DLLEXPORT int jl_id_start_char(uint32_t wc)
{
if ((wc >= 'A' && wc <= 'Z') || (wc >= 'a' && wc <= 'z') || wc == '_')
return 1;
if (wc < 0xA1 || wc > 0x10ffff)
return 0;
return is_wc_cat_id_start(wc, utf8proc_category((utf8proc_int32_t) wc));
}
JL_DLLEXPORT int jl_id_char(uint32_t wc)
{
if ((wc >= 'A' && wc <= 'Z') || (wc >= 'a' && wc <= 'z') || wc == '_' ||
(wc >= '0' && wc <= '9') || wc == '!')
return 1;
if (wc < 0xA1 || wc > 0x10ffff)
return 0;
utf8proc_category_t cat = utf8proc_category((utf8proc_int32_t) wc);
if (is_wc_cat_id_start(wc, cat)) return 1;
if (cat == UTF8PROC_CATEGORY_MN || cat == UTF8PROC_CATEGORY_MC ||
cat == UTF8PROC_CATEGORY_ND || cat == UTF8PROC_CATEGORY_PC ||
cat == UTF8PROC_CATEGORY_SK || cat == UTF8PROC_CATEGORY_ME ||
cat == UTF8PROC_CATEGORY_NO ||
// primes (single, double, triple, their reverses, and quadruple)
(wc >= 0x2032 && wc <= 0x2037) || (wc == 0x2057))
return 1;
return 0;
}
#include "julia_opsuffs.h"
// chars that can follow an operator (e.g. +) and be parsed as part of the operator
JL_DLLEXPORT int jl_op_suffix_char(uint32_t wc)
{
static htable_t jl_opsuffs; // XXX: requires uv_once
if (!jl_opsuffs.size) { // initialize hash table of suffixes
size_t i, opsuffs_len = sizeof(opsuffs) / (sizeof(uint32_t));
htable_t *h = htable_new(&jl_opsuffs, opsuffs_len);
assert(sizeof(uint32_t) <= sizeof(void*));
for (i = 0; i < opsuffs_len; ++i)
wcharhash_put_r(h, (void*)((uintptr_t)opsuffs[i]), NULL, NULL);
}
if (wc < 0xA1 || wc > 0x10ffff) return 0;
utf8proc_category_t cat = utf8proc_category((utf8proc_int32_t) wc);
if (cat == UTF8PROC_CATEGORY_MN || cat == UTF8PROC_CATEGORY_MC ||
cat == UTF8PROC_CATEGORY_ME)
return 1;
// use hash table of other allowed characters: primes and sub/superscripts
return HT_NOTFOUND != wcharhash_get_r(&jl_opsuffs, (void*)((uintptr_t)wc), NULL);
}
// chars that we will never allow to be part of a valid non-operator identifier
static int never_id_char(uint32_t wc)
{
utf8proc_category_t cat = utf8proc_category((utf8proc_int32_t) wc);
return (
// spaces and control characters:
(cat >= UTF8PROC_CATEGORY_ZS && cat <= UTF8PROC_CATEGORY_CS) ||
// ASCII and Latin1 non-connector punctuation
(wc < 0xff &&
cat >= UTF8PROC_CATEGORY_PD && cat <= UTF8PROC_CATEGORY_PO) ||
wc == '`' ||
// mathematical brackets
(wc >= 0x27e6 && wc <= 0x27ef) ||
// angle, corner, and lenticular brackets
(wc >= 0x3008 && wc <= 0x3011) ||
// tortoise shell, square, and more lenticular brackets
(wc >= 0x3014 && wc <= 0x301b) ||
// fullwidth parens
(wc == 0xff08 || wc == 0xff09) ||
// fullwidth square brackets
(wc == 0xff3b || wc == 0xff3d));
}
value_t fl_julia_identifier_char(fl_context_t *fl_ctx, value_t *args, uint32_t nargs)
{
argcount(fl_ctx, "identifier-char?", nargs, 1);
if (!iscprim(args[0]) || ((cprim_t*)ptr(args[0]))->type != fl_ctx->wchartype)
type_error(fl_ctx, "identifier-char?", "wchar", args[0]);
uint32_t wc = *(uint32_t*)cp_data((cprim_t*)ptr(args[0]));
return jl_id_char(wc) ? fl_ctx->T : fl_ctx->F;
}
value_t fl_julia_identifier_start_char(fl_context_t *fl_ctx, value_t *args, uint32_t nargs)
{
argcount(fl_ctx, "identifier-start-char?", nargs, 1);
if (!iscprim(args[0]) || ((cprim_t*)ptr(args[0]))->type != fl_ctx->wchartype)
type_error(fl_ctx, "identifier-start-char?", "wchar", args[0]);
uint32_t wc = *(uint32_t*)cp_data((cprim_t*)ptr(args[0]));
return jl_id_start_char(wc) ? fl_ctx->T : fl_ctx->F;
}
value_t fl_julia_never_identifier_char(fl_context_t *fl_ctx, value_t *args, uint32_t nargs)
{
argcount(fl_ctx, "never-identifier-char?", nargs, 1);
if (!iscprim(args[0]) || ((cprim_t*)ptr(args[0]))->type != fl_ctx->wchartype)
type_error(fl_ctx, "never-identifier-char?", "wchar", args[0]);
uint32_t wc = *(uint32_t*)cp_data((cprim_t*)ptr(args[0]));
return never_id_char(wc) ? fl_ctx->T : fl_ctx->F;
}
value_t fl_julia_op_suffix_char(fl_context_t *fl_ctx, value_t *args, uint32_t nargs)
{
argcount(fl_ctx, "op-suffix-char?", nargs, 1);
if (!iscprim(args[0]) || ((cprim_t*)ptr(args[0]))->type != fl_ctx->wchartype)
type_error(fl_ctx, "op-suffix-char?", "wchar", args[0]);
uint32_t wc = *(uint32_t*)cp_data((cprim_t*)ptr(args[0]));
return jl_op_suffix_char(wc) ? fl_ctx->T : fl_ctx->F;
}
value_t fl_julia_strip_op_suffix(fl_context_t *fl_ctx, value_t *args, uint32_t nargs)
{
argcount(fl_ctx, "strip-op-suffix", nargs, 1);
if (!issymbol(args[0]))
type_error(fl_ctx, "strip-op-suffix", "symbol", args[0]);
char *op = symbol_name(fl_ctx, args[0]);
size_t i = 0;
while (op[i]) {
size_t j = i;
if (jl_op_suffix_char(u8_nextchar(op, &j)))
break;
i = j;
}
if (!op[i]) return args[0]; // no suffix to strip
if (!i) return args[0]; // only suffix chars --- might still be a valid identifier
char *opnew = strncpy((char*)malloc(i+1), op, i);
// TODO: if argument to opnew == NULL
opnew[i] = 0;
value_t opnew_symbol = symbol(fl_ctx, opnew);
free(opnew);
return opnew_symbol;
}
/* check whether arg is a symbol that consists solely of underscores. */
value_t fl_julia_underscore_symbolp(fl_context_t *fl_ctx, value_t *args, uint32_t nargs)
{
argcount(fl_ctx, "underscore-symbol?", nargs, 1);
if (!issymbol(args[0])) return fl_ctx->F;
char *op = symbol_name(fl_ctx, args[0]);
if (*op == '\0') return fl_ctx->F; // return false for empty symbol
while (*op == '_') ++op;
return *op ? fl_ctx->F : fl_ctx->T;
}
#include "julia_charmap.h"
utf8proc_int32_t jl_charmap_map(utf8proc_int32_t c, void *ctx)
{
static htable_t jl_charmap; // XXX: requires uv_once
if (!jl_charmap.size) { // initialize hash table
size_t i, charmap_len = sizeof(charmap) / (2*sizeof(uint32_t));
htable_t *h = htable_new(&jl_charmap, charmap_len);
assert(sizeof(uint32_t) <= sizeof(void*));
for (i = 0; i < charmap_len; ++i) {
/* Store charmap in a hash table. Typecasting codepoints
directly to pointer keys works because pointers are at
least 32 bits on all Julia-supported systems, and because
we never map anything to U+0001 (since HT_NOTFOUND is (void*)1). */
assert((void*)(uintptr_t)charmap[i][1] != HT_NOTFOUND);
wcharhash_put_r(h, (void*)((uintptr_t)charmap[i][0]),
(void*)((uintptr_t)charmap[i][1]), NULL);
}
}
void *v = wcharhash_get_r(&jl_charmap, (void*)((uintptr_t)c), NULL);
return v == HT_NOTFOUND ? c : (utf8proc_int32_t) ((uintptr_t) v);
}
// return NFC-normalized UTF8-encoded version of s, with
// additional custom normalizations defined by jl_charmap above.
static char *normalize(fl_context_t *fl_ctx, char *s)
{
// options equivalent to utf8proc_NFC:
const int options = UTF8PROC_NULLTERM|UTF8PROC_STABLE|UTF8PROC_COMPOSE;
ssize_t result;
size_t newlen;
result = utf8proc_decompose_custom((uint8_t*) s, 0, NULL, 0, (utf8proc_option_t)options,
jl_charmap_map, NULL);
if (result < 0) goto error;
newlen = result * sizeof(int32_t) + 1;
if (newlen > fl_ctx->jlbuflen) {
fl_ctx->jlbuflen = newlen * 2;
fl_ctx->jlbuf = realloc(fl_ctx->jlbuf, fl_ctx->jlbuflen);
if (!fl_ctx->jlbuf) lerror(fl_ctx, fl_ctx->OutOfMemoryError, "error allocating UTF8 buffer");
}
result = utf8proc_decompose_custom((uint8_t*)s,0, (int32_t*)fl_ctx->jlbuf,result, (utf8proc_option_t)options,
jl_charmap_map, NULL);
if (result < 0) goto error;
result = utf8proc_reencode((int32_t*)fl_ctx->jlbuf,result, (utf8proc_option_t)options);
if (result < 0) goto error;
return (char*) fl_ctx->jlbuf;
error:
lerrorf(fl_ctx, symbol(fl_ctx, "error"), "error normalizing identifier %s: %s", s,
utf8proc_errmsg(result));
}
value_t fl_accum_julia_symbol(fl_context_t *fl_ctx, value_t *args, uint32_t nargs)
{
argcount(fl_ctx, "accum-julia-symbol", nargs, 2);
ios_t *s = fl_toiostream(fl_ctx, args[1], "accum-julia-symbol");
if (!iscprim(args[0]) || ((cprim_t*)ptr(args[0]))->type != fl_ctx->wchartype)
type_error(fl_ctx, "accum-julia-symbol", "wchar", args[0]);
uint32_t wc = *(uint32_t*)cp_data((cprim_t*)ptr(args[0]));
ios_t str;
int allascii = 1;
ios_mem(&str, 0);
do {
allascii &= (wc <= 0x7f);
ios_getutf8(s, &wc);
if (wc == '!') {
uint32_t nwc = 0;
ios_peekutf8(s, &nwc);
// make sure != is always an operator
if (nwc == '=') {
ios_ungetc('!', s);
break;
}
}
ios_pututf8(&str, wc);
if (safe_peekutf8(fl_ctx, s, &wc) == IOS_EOF)
break;
} while (jl_id_char(wc));
ios_pututf8(&str, 0);
return symbol(fl_ctx, allascii ? str.buf : normalize(fl_ctx, str.buf));
}
/* convert a string to a symbol, first applying normalization */
value_t fl_string2normsymbol(fl_context_t *fl_ctx, value_t *args, uint32_t nargs)
{
argcount(fl_ctx, "string->normsymbol", nargs, 1);
if (!fl_isstring(fl_ctx, args[0]))
type_error(fl_ctx, "string->normsymbol", "string", args[0]);
return symbol(fl_ctx, normalize(fl_ctx, (char*)cvalue_data(args[0])));
}
static const builtinspec_t julia_flisp_func_info[] = {
{ "skip-ws", fl_skipws },
{ "accum-julia-symbol", fl_accum_julia_symbol },
{ "identifier-char?", fl_julia_identifier_char },
{ "identifier-start-char?", fl_julia_identifier_start_char },
{ "never-identifier-char?", fl_julia_never_identifier_char },
{ "op-suffix-char?", fl_julia_op_suffix_char },
{ "strip-op-suffix", fl_julia_strip_op_suffix },
{ "underscore-symbol?", fl_julia_underscore_symbolp },
{ "string->normsymbol", fl_string2normsymbol },
{ NULL, NULL }
};
void fl_init_julia_extensions(fl_context_t *fl_ctx)
{
assign_global_builtins(fl_ctx, julia_flisp_func_info);
}
#ifdef __cplusplus
}
#endif