290 lines
8.4 KiB
C
290 lines
8.4 KiB
C
/*
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string functions
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <setjmp.h>
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#include <stdarg.h>
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#include <assert.h>
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#include <ctype.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <errno.h>
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#include "llt.h"
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#include "flisp.h"
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value_t fl_intern(value_t *args, u_int32_t nargs)
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{
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argcount("intern", nargs, 1);
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if (!isstring(args[0]))
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type_error("intern", "string", args[0]);
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return symbol(cvalue_data(args[0]));
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}
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value_t fl_stringp(value_t *args, u_int32_t nargs)
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{
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argcount("stringp", nargs, 1);
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return isstring(args[0]) ? T : NIL;
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}
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value_t fl_string_length(value_t *args, u_int32_t nargs)
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{
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argcount("string.length", nargs, 1);
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if (!isstring(args[0]))
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type_error("string.length", "string", args[0]);
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size_t len = cv_len((cvalue_t*)ptr(args[0]));
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return size_wrap(u8_charnum(cvalue_data(args[0]), len));
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}
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value_t fl_string_reverse(value_t *args, u_int32_t nargs)
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{
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argcount("string.reverse", nargs, 1);
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if (!isstring(args[0]))
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type_error("string.reverse", "string", args[0]);
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size_t len = cv_len((cvalue_t*)ptr(args[0]));
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value_t ns = cvalue_string(len);
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u8_reverse(cvalue_data(ns), cvalue_data(args[0]), len);
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return ns;
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}
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value_t fl_string_encode(value_t *args, u_int32_t nargs)
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{
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argcount("string.encode", nargs, 1);
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if (iscvalue(args[0])) {
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cvalue_t *cv = (cvalue_t*)ptr(args[0]);
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value_t t = cv_type(cv);
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if (iscons(t) && car_(t) == arraysym &&
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iscons(cdr_(t)) && car_(cdr_(t)) == wcharsym) {
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size_t nc = cv_len(cv) / sizeof(uint32_t);
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uint32_t *ptr = (uint32_t*)cv_data(cv);
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size_t nbytes = u8_codingsize(ptr, nc);
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value_t str = cvalue_string(nbytes);
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ptr = cv_data((cvalue_t*)ptr(args[0])); // relocatable pointer
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u8_toutf8(cvalue_data(str), nbytes, ptr, nc);
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return str;
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}
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}
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type_error("string.encode", "wide character array", args[0]);
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}
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value_t fl_string_decode(value_t *args, u_int32_t nargs)
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{
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int term=0;
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if (nargs == 2) {
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term = (POP() != NIL);
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nargs--;
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}
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argcount("string.decode", nargs, 1);
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if (!isstring(args[0]))
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type_error("string.decode", "string", args[0]);
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cvalue_t *cv = (cvalue_t*)ptr(args[0]);
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char *ptr = (char*)cv_data(cv);
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size_t nb = cv_len(cv);
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size_t nc = u8_charnum(ptr, nb);
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size_t newsz = nc*sizeof(uint32_t);
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if (term) newsz += sizeof(uint32_t);
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value_t wcstr = cvalue(wcstringtype, newsz);
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ptr = cv_data((cvalue_t*)ptr(args[0])); // relocatable pointer
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uint32_t *pwc = cvalue_data(wcstr);
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u8_toucs(pwc, nc, ptr, nb);
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if (term) pwc[nc] = 0;
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return wcstr;
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}
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value_t fl_string(value_t *args, u_int32_t nargs)
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{
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value_t cv, t;
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u_int32_t i;
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size_t len, sz = 0;
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cvalue_t *temp;
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char *data;
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uint32_t wc;
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for(i=0; i < nargs; i++) {
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if (issymbol(args[i])) {
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sz += strlen(symbol_name(args[i]));
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continue;
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}
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else if (iscvalue(args[i])) {
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temp = (cvalue_t*)ptr(args[i]);
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t = cv_type(temp);
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if (t == charsym) {
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sz++;
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continue;
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}
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else if (t == wcharsym) {
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wc = *(uint32_t*)cv_data(temp);
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sz += u8_charlen(wc);
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continue;
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}
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else if (cv_isstr(temp)) {
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sz += cv_len(temp);
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continue;
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}
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}
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lerror(ArgError, "string: expected string, symbol or character");
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}
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cv = cvalue_string(sz);
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char *ptr = cvalue_data(cv);
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for(i=0; i < nargs; i++) {
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if (issymbol(args[i])) {
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char *name = symbol_name(args[i]);
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while (*name) *ptr++ = *name++;
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}
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else {
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temp = (cvalue_t*)ptr(args[i]);
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t = cv_type(temp);
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data = cvalue_data(args[i]);
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if (t == charsym) {
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*ptr++ = *(char*)data;
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}
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else if (t == wcharsym) {
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ptr += u8_wc_toutf8(ptr, *(uint32_t*)data);
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}
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else {
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len = cv_len(temp);
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memcpy(ptr, data, len);
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ptr += len;
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}
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}
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}
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return cv;
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}
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value_t fl_string_split(value_t *args, u_int32_t nargs)
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{
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argcount("string.split", nargs, 2);
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char *s = tostring(args[0], "string.split");
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char *delim = tostring(args[1], "string.split");
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size_t len = cv_len((cvalue_t*)ptr(args[0]));
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size_t dlen = cv_len((cvalue_t*)ptr(args[1]));
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PUSH(NIL);
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size_t ssz, tokend=0, tokstart=0, i=0;
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value_t c=NIL;
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size_t junk;
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do {
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// find and allocate next token
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tokstart = tokend = i;
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while (i < len &&
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!u8_memchr(delim, u8_nextmemchar(s, &i), dlen, &junk))
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tokend = i;
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ssz = tokend - tokstart;
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PUSH(c); // save previous cons cell
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c = fl_cons(cvalue_string(ssz), NIL);
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// we've done allocation; reload movable pointers
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s = cv_data((cvalue_t*)ptr(args[0]));
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delim = cv_data((cvalue_t*)ptr(args[1]));
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if (ssz) memcpy(cv_data((cvalue_t*)ptr(car_(c))), &s[tokstart], ssz);
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// link new cell
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if (Stack[SP-1] == NIL) {
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Stack[SP-2] = c; // first time, save first cons
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(void)POP();
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}
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else {
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((cons_t*)ptr(POP()))->cdr = c;
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}
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// note this tricky condition: if the string ends with a
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// delimiter, we need to go around one more time to add an
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// empty string. this happens when (i==len && tokend<i)
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} while (i < len || (i==len && (tokend!=i)));
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return POP();
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}
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value_t fl_string_sub(value_t *args, u_int32_t nargs)
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{
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argcount("string.sub", nargs, 3);
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char *s = tostring(args[0], "string.sub");
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size_t len = cv_len((cvalue_t*)ptr(args[0]));
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size_t i1, i2;
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i1 = toulong(args[1], "string.sub");
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if (i1 > len)
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bounds_error("string.sub", args[0], args[1]);
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i2 = toulong(args[2], "string.sub");
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if (i2 > len)
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bounds_error("string.sub", args[0], args[2]);
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if (i2 <= i1)
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return cvalue_string(0);
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value_t ns = cvalue_string(i2-i1);
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memcpy(cv_data((cvalue_t*)ptr(ns)), &s[i1], i2-i1);
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return ns;
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}
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value_t fl_string_char(value_t *args, u_int32_t nargs)
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{
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argcount("string.char", nargs, 2);
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char *s = tostring(args[0], "string.char");
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size_t len = cv_len((cvalue_t*)ptr(args[0]));
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size_t i = toulong(args[1], "string.char");
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if (i >= len)
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bounds_error("string.char", args[0], args[1]);
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size_t sl = u8_seqlen(&s[i]);
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if (sl > len || i > len-sl)
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bounds_error("string.char", args[0], args[1]);
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return char_from_code(u8_nextchar(s, &i));
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}
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value_t fl_string_inc(value_t *args, u_int32_t nargs)
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{
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if (nargs < 2 || nargs > 3)
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argcount("string.inc", nargs, 2);
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char *s = tostring(args[0], "string.inc");
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size_t len = cv_len((cvalue_t*)ptr(args[0]));
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size_t i = toulong(args[1], "string.inc");
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size_t cnt = 1;
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if (nargs == 3)
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cnt = toulong(args[2], "string.inc");
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while (cnt--) {
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if (i >= len)
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bounds_error("string.inc", args[0], args[1]);
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u8_inc(s, &i);
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}
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return size_wrap(i);
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}
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value_t fl_string_dec(value_t *args, u_int32_t nargs)
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{
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if (nargs < 2 || nargs > 3)
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argcount("string.dec", nargs, 2);
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char *s = tostring(args[0], "string.dec");
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size_t len = cv_len((cvalue_t*)ptr(args[0]));
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size_t i = toulong(args[1], "string.dec");
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size_t cnt = 1;
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if (nargs == 3)
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cnt = toulong(args[2], "string.dec");
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// note: i is allowed to start at index len
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if (i > len)
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bounds_error("string.dec", args[0], args[1]);
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while (cnt--) {
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if (i == 0)
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bounds_error("string.dec", args[0], args[1]);
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u8_dec(s, &i);
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}
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return size_wrap(i);
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}
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static builtinspec_t stringfunc_info[] = {
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{ "intern", fl_intern },
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{ "string", fl_string },
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{ "stringp", fl_stringp },
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{ "string.length", fl_string_length },
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{ "string.split", fl_string_split },
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{ "string.sub", fl_string_sub },
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{ "string.char", fl_string_char },
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{ "string.inc", fl_string_inc },
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{ "string.dec", fl_string_dec },
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{ "string.reverse", fl_string_reverse },
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{ "string.encode", fl_string_encode },
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{ "string.decode", fl_string_decode },
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{ NULL, NULL }
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};
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void stringfuncs_init()
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{
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assign_global_builtins(stringfunc_info);
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}
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