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julia_extensions.c
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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 DLLEXPORT /* avoid conflicting definition */
#include "flisp.h"
#ifdef __cplusplus
extern "C" {
#endif
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;
}
value_t fl_skipws(value_t *args, u_int32_t nargs)
{
argcount("skip-ws", nargs, 2);
ios_t *s = fl_toiostream(args[0], "skip-ws");
int newlines = (args[1]!=FL_F);
uint32_t wc=0;
value_t skipped = FL_F;
while (1) {
if (ios_peekutf8(s, &wc) == IOS_EOF) {
ios_getutf8(s, &wc); // to set EOF flag if this is a true EOF
if (!ios_eof(s))
lerror(symbol("error"), "incomplete character");
return FL_EOF;
}
if (!ios_eof(s) && (is_uws(wc) || is_bom(wc)) && (newlines || wc!=10)) {
skipped = FL_T;
ios_getutf8(s, &wc);
}
else {
break;
}
}
return skipped;
}
static int is_wc_cat_id_start(uint32_t wc, utf8proc_propval_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
cat == UTF8PROC_CATEGORY_SO || // other symbols
// math symbol (category Sm) whitelist
(wc >= 0x2140 && wc <= 0x2a1c &&
((wc >= 0x2140 && wc <= 0x2144) || // ⅀, ⅁, ⅂, ⅃, ⅄
wc == 0x223f || wc == 0x22be || wc == 0x22bf || // ∿, ⊾, ⊿
wc == 0x22a4 || wc == 0x22a5 || // ⊤ ⊥
(wc >= 0x22ee && wc <= 0x22f1) || // ⋮, ⋯, ⋰, ⋱
(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 <= 0x27c2) || // ⟀, ⟁, ⟂
(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
}
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;
const utf8proc_property_t *prop = utf8proc_get_property(wc);
return is_wc_cat_id_start(wc, prop->category);
}
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;
const utf8proc_property_t *prop = utf8proc_get_property(wc);
utf8proc_propval_t cat = prop->category;
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) ||
// Other_ID_Continue
wc == 0x0387 || wc == 0x19da || (wc >= 0x1369 && wc <= 0x1371))
return 1;
return 0;
}
value_t fl_julia_identifier_char(value_t *args, u_int32_t nargs)
{
argcount("identifier-char?", nargs, 1);
if (!iscprim(args[0]) || ((cprim_t*)ptr(args[0]))->type != wchartype)
type_error("identifier-char?", "wchar", args[0]);
uint32_t wc = *(uint32_t*)cp_data((cprim_t*)ptr(args[0]));
return jl_id_char(wc) ? FL_T : FL_F;
}
value_t fl_julia_identifier_start_char(value_t *args, u_int32_t nargs)
{
argcount("identifier-start-char?", nargs, 1);
if (!iscprim(args[0]) || ((cprim_t*)ptr(args[0]))->type != wchartype)
type_error("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_T : FL_F;
}
// return NFC-normalized UTF8-encoded version of s
static char *normalize(char *s)
{
static size_t buflen = 0;
static void *buf = NULL; // persistent buffer (avoid repeated malloc/free)
// options equivalent to utf8proc_NFC:
const int options = UTF8PROC_NULLTERM|UTF8PROC_STABLE|UTF8PROC_COMPOSE;
ssize_t result;
size_t newlen;
result = utf8proc_decompose((uint8_t*) s, 0, NULL, 0, (utf8proc_option_t)options);
if (result < 0) goto error;
newlen = result * sizeof(int32_t) + 1;
if (newlen > buflen) {
buflen = newlen * 2;
buf = realloc(buf, buflen);
if (!buf) lerror(OutOfMemoryError, "error allocating UTF8 buffer");
}
result = utf8proc_decompose((uint8_t*)s,0, (int32_t*)buf,result, (utf8proc_option_t)options);
if (result < 0) goto error;
result = utf8proc_reencode((int32_t*)buf,result, (utf8proc_option_t)options);
if (result < 0) goto error;
return (char*) buf;
error:
lerrorf(symbol("error"), "error normalizing identifier %s: %s", s,
utf8proc_errmsg(result));
}
value_t fl_accum_julia_symbol(value_t *args, u_int32_t nargs)
{
argcount("accum-julia-symbol", nargs, 2);
ios_t *s = fl_toiostream(args[1], "accum-julia-symbol");
if (!iscprim(args[0]) || ((cprim_t*)ptr(args[0]))->type != wchartype)
type_error("accum-julia-symbol", "wchar", args[0]);
uint32_t wc = *(uint32_t*)cp_data((cprim_t*)ptr(args[0]));
ios_t str;
ios_mem(&str, 0);
while (jl_id_char(wc)) {
ios_getutf8(s, &wc);
if (wc == '!') {
uint32_t nwc;
ios_peekutf8(s, &nwc);
// make sure != is always an operator
if (nwc == '=') {
ios_ungetc('!', s);
break;
}
}
ios_pututf8(&str, wc);
if (ios_peekutf8(s, &wc) == IOS_EOF)
break;
}
ios_pututf8(&str, 0);
return symbol(normalize(str.buf));
}
static 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 },
{ NULL, NULL }
};
void fl_init_julia_extensions(void)
{
assign_global_builtins(julia_flisp_func_info);
}
#ifdef __cplusplus
}
#endif