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Copy pathnl-liststr.c
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nl-liststr.c
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/* nl-liststr.c --- newLISP primitives handling lists and strings
Copyright (C) 2020 Lutz Mueller
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "newlisp.h"
#include "protos.h"
extern CELL * lastCellCopied;
extern CELL * countCell;
extern SYMBOL * sysSymbol[];
extern SYMBOL * countSymbol;
extern void printResultStack();
/* used only on string indices */
size_t adjustNegativeIndex(ssize_t index, size_t length)
{
if(index < 0) index = length + index;
else if((index+1) > length) errorProc(ERR_STRING_INDEX_INVALID);
if(index < 0) errorProc(ERR_STRING_INDEX_INVALID);
return(index);
}
size_t adjustCount(ssize_t count, ssize_t length)
{
if(length <= 1 || count == 0 || length == labs(count))
return(0);
if(count > 0)
count = count % length;
else
{
count = -count % length;
count = length - count;
}
return(count);
}
#ifdef LINUX
extern char * strcasestr(const char * haystack, const char * needle);
#endif
CELL * p_member(CELL * params)
{
CELL * key;
CELL * list;
INT options = -1;
char * ptr;
ssize_t pos;
key = evaluateExpression(params);
params = getEvalDefault(params->next, &list);
if(params != nilCell)
getInteger(params, (UINT *)&options);
if(isList(list->type))
list = (CELL *)list->contents;
else if (list->type == CELL_STRING)
{
if(key->type != CELL_STRING)
return(errorProcExt(ERR_STRING_EXPECTED, key));
if(options == -1)
{
ptr = strstr((char *)list->contents, (char *) key->contents);
if(ptr) return(stuffString(ptr));
}
else
{
pos = searchBufferRegex((char*)list->contents, 0, (char *)key->contents, list->aux - 1, options, 0);
if(pos != -1) return(stuffString((char *)list->contents + pos));
}
return(nilCell);
}
else
return(errorProcExt(ERR_LIST_OR_STRING_EXPECTED, params->next));
while(list != nilCell)
{
if(compareCells(key, list) == 0) break;
list = list->next;
}
if(list == nilCell) return(nilCell);
return(makeCell(CELL_EXPRESSION, (UINT)copyList(list)));
}
CELL * p_length(CELL * params)
{
size_t length;
SYMBOL * symbol;
#ifdef BIGINT
int * bigintPtr;
int * result;
int len;
#else
INT64 number;
double fnum;
#endif
params = evaluateExpression(params);
length = 0;
switch(params->type)
{
#ifdef BIGINT
case CELL_LONG:
#ifndef NEWLISP64
case CELL_INT64:
#endif
case CELL_FLOAT:
case CELL_BIGINT:
result = getBigintSizeDirect(params, &bigintPtr, &len);
length = lengthBigint(bigintPtr, len);
if(result) free(result);
break;
#else /* not BIGINT */
case CELL_LONG:
#ifndef NEWLISP64
case CELL_INT64:
#endif
getInteger64Ext(params, &number, FALSE);
if(number == 0)
length = 1;
else
{
if(number < 0) number = - number;
length = log(number) / log(10) + 1.5;
}
break;
case CELL_FLOAT:
getFloat(params, &fnum);
if(fnum == 0.0)
length = 1;
else
{
if(fnum < 0.0) fnum = - fnum;
length = log(fnum) / log(10) + 1.5;
}
break;
#endif /* not BIGINT */
case CELL_STRING:
length = params->aux - 1; break;
case CELL_CONTEXT:
symbol = translateCreateSymbol( ((SYMBOL*)params->contents)->name, CELL_NIL,
(SYMBOL*)params->contents, TRUE);
params = (CELL *)symbol->contents;
if(params->type == CELL_STRING)
length = params->aux - 1;
else if(isList(params->type))
length = listlen((CELL *)params->contents);
else if(params->type == CELL_ARRAY)
length = (params->aux -1) / sizeof(UINT);
break;
case CELL_SYMBOL:
symbol = (SYMBOL *)params->contents;
length = strlen(symbol->name);
break;
case CELL_DYN_SYMBOL:
length = strlen((char *)params->contents);
break;
case CELL_EXPRESSION:
case CELL_LAMBDA:
case CELL_FEXPR:
length = listlen((CELL *)params->contents);
break;
case CELL_ARRAY:
length = (params->aux - 1) / sizeof(UINT);
default:
break;
}
return(stuffInteger(length));
}
CELL * p_append(CELL * params)
{
CELL * list = NULL;
CELL * firstCell = NULL;
CELL * copy = NULL;
CELL * cell;
while(params != nilCell)
{
params = getEvalDefault(params, &cell);
if(!isList(cell->type))
{
if(copy == NULL)
{
if(cell->type == CELL_STRING)
return(appendString(cell, params, NULL, 0, FALSE, TRUE));
else if(cell->type == CELL_ARRAY)
return(appendArray(cell, params));
return(errorProcExt(ERR_ARRAY_LIST_OR_STRING_EXPECTED, cell));
}
return(errorProcExt(ERR_LIST_EXPECTED, cell));
}
if(list == NULL)
list = getCell(cell->type);
copy = copyList((CELL *)cell->contents);
if(copy == nilCell) continue;
if(firstCell == NULL) list->contents = (UINT)copy;
else firstCell->next = copy;
firstCell = lastCellCopied;
}
if(list == NULL)
return(getCell(CELL_EXPRESSION));
symbolCheck = NULL;
list->aux = (UINT)lastCellCopied; /* last element optimization */
return(list);
}
CELL * appendString(CELL * cell, CELL * list, char * joint, size_t jointLen, int trailJoint, int evalFlag)
{
CELL * result;
STREAM stream = {NULL, NULL, 0, 0, 0};
char * sPtr;
size_t len;
openStrStream(&stream, MAX_LINE, 0);
writeStreamStr(&stream, (char *)cell->contents, cell->aux - 1);
while(list != nilCell)
{
if(joint == NULL)
{
list = getStringSize(list, &sPtr, &len, evalFlag);
writeStreamStr(&stream, sPtr, len);
}
else
{
list = getStringSize(list, &sPtr, &len, FALSE);
if(jointLen) writeStreamStr(&stream, joint, jointLen);
writeStreamStr(&stream, sPtr, len);
}
}
if(trailJoint)
writeStreamStr(&stream, joint, jointLen);
result = stuffStringN(stream.buffer, stream.position);
closeStrStream(&stream);
symbolCheck = NULL;
return(result);
}
CELL * p_extend(CELL * params)
{
CELL * target;
CELL * head;
CELL * tail;
SYMBOL * symbolRef;
char * pStr;
size_t size;
params = getEvalDefault(params, &target);
if((symbolRef = symbolCheck))
{
if(isProtected(symbolRef->flags))
return(errorProcExt2(ERR_SYMBOL_PROTECTED, stuffSymbol(symbolRef)));
if(isNil((CELL *)symbolRef->contents))
{
head = evaluateExpression(params); /* extension */
if(isList(head->type) || head->type == CELL_STRING)
{
target = copyCell(head);
deleteList((CELL*)symbolRef->contents);
symbolRef->contents = (UINT)target;
}
params = params->next;
}
}
if(isList(target->type))
{
tail = (CELL *)target->aux;
target->aux = (UINT)nilCell;
if(tail == nilCell)
{
tail = (CELL *)target->contents;
while(tail->next != nilCell)
tail = tail->next;
}
while(params != nilCell)
{
params = getListHead(params, &head);
if(head == nilCell) continue;
if(target->contents == (UINT)nilCell)
{
target->contents = (UINT)copyList(head);
tail = lastCellCopied;
}
else
{
tail->next = copyList(head);
target->aux = (UINT)lastCellCopied;
tail = (CELL *)target->aux;
}
}
}
else if(target->type == CELL_STRING)
{
while(params != nilCell)
{
params = getStringSize(params, &pStr, &size, TRUE);
appendCellString(target, pStr, size);
}
}
else return(errorProcExt(ERR_LIST_OR_STRING_EXPECTED, target));
symbolCheck = symbolRef;
pushResultFlag = FALSE;
return(target);
}
CELL * p_chop(CELL * params)
{
size_t number = 1;
size_t length = 0;
CELL * next;
#ifdef SUPPORT_UTF8
char * ptr;
#endif
next = getEvalDefault(params, ¶ms);
if(next != nilCell)
getInteger(next, (UINT *)&number);
if(params->type == CELL_STRING)
{
#ifndef SUPPORT_UTF8
length = params->aux - 1;
if(number > length) number = length;
length = length - number;
return stuffStringN((char *)params->contents, length);
#else
length = utf8_wlen((char *)params->contents, (char *)params->contents + params->aux);
if(number > length) number = length;
length = length - number;
ptr = (char *)params->contents;
ptr = utf8_index(ptr, length);
return stuffStringN((char *)params->contents, ptr - (char *)params->contents);
#endif
}
if(!isList(params->type))
return(errorProc(ERR_LIST_OR_STRING_EXPECTED));
length = listlen((CELL *)params->contents);
if(number > length) number = length;
return(sublist((CELL *)params->contents, 0, length - number));
}
CELL * p_nth(CELL * params)
{
CELL * list;
CELL * cell;
CELL * (*implicitIndexFunc)(CELL *, CELL *);
SYMBOL * symbolRef;
cell = getEvalDefault(params->next, &list); /* list or string to be indexed */
symbolRef = symbolCheck;
params = copyCell(params); /* indices */
pushResult(params);
if(isList(list->type))
implicitIndexFunc = implicitIndexList;
else if(list->type == CELL_ARRAY)
implicitIndexFunc = implicitIndexArray;
else if(list->type == CELL_STRING)
{
list = implicitIndexString(list, params);
symbolCheck = symbolRef;
pushResult(list);
pushResultFlag = FALSE;
return(list);
}
else return(errorProcExt(ERR_LIST_EXPECTED, list));
cell = (*implicitIndexFunc)(list, params);
symbolCheck = symbolRef;
pushResultFlag = FALSE;
return(cell);
}
#define INSERT_BEFORE 0
#define INSERT_AFTER 1
#define INSERT_END 2
CELL * p_push(CELL * params)
{
CELL * newCell;
CELL * list;
CELL * cell = NULL;
CELL * listOrg;
SYMBOL * symbolRef;
int insert = 0, evalFlag = 0;
ssize_t index;
newCell = evaluateExpression(params);
params = getEvalDefault(params->next, &list);
listOrg = list;
if((symbolRef = symbolCheck))
{
if(isProtected(symbolCheck->flags))
return(errorProcExt2(ERR_SYMBOL_PROTECTED, stuffSymbol(symbolCheck)));
if(isNil((CELL *)symbolCheck->contents))
{
deleteList((CELL*)symbolCheck->contents);
listOrg = makeCell(CELL_EXPRESSION, (UINT)copyCell(newCell));
symbolCheck->contents = (UINT)listOrg;
goto PUSH_RETURN;
}
}
if(!isList(list->type))
{
if(list->type == CELL_STRING)
{
pushOnString(newCell, list, params);
goto PUSH_RETURN;
}
else
return(errorProcExt(ERR_LIST_OR_STRING_EXPECTED, list));
}
if(params == nilCell)
index = 0;
else
{
cell = (CELL*)params->next;
params = evaluateExpression(params);
if(isList(params->type))
{
evalFlag = FALSE;
params = getIntegerExt((CELL*)params->contents, (UINT*)&index, FALSE);
}
else
{
evalFlag = TRUE;
getIntegerExt(params, (UINT*)&index, FALSE);
params = cell;
}
}
if(index == -1)
{
if(params == nilCell)
{
newCell = copyCell(newCell);
cell = (CELL*)list->aux;
list->aux = (UINT)newCell;
if(cell != nilCell && cell != trueCell)
cell->next = newCell;
else if(list->contents == (UINT)nilCell)
list->contents = (UINT)newCell;
else
{
cell = (CELL *)list->contents;
while(cell->next != nilCell)
cell = cell->next;
cell->next = newCell;
}
goto PUSH_RETURN;
}
}
while(isList(list->type))
{
list->aux = (UINT)nilCell; /* undo last element optimization */
cell = list;
list = (CELL *)list->contents;
if(index < 0)
{
index = listlen(list) + index;
if(index == -1)
{
index = 0;
insert = INSERT_BEFORE;
}
else if(index >= 0) insert = INSERT_AFTER;
else errorProc(ERR_LIST_INDEX_INVALID);
}
else insert = INSERT_BEFORE;
while(index--)
{
if(list == nilCell)
{
if(index >= 0) errorProc(ERR_LIST_INDEX_INVALID);
insert = INSERT_END;
break;
}
cell = list;
list = list->next;
}
if(params == nilCell || !isList(list->type)) break;
params = getIntegerExt(params, (UINT*)&index, evalFlag);
}
newCell = copyCell(newCell);
if(insert == INSERT_BEFORE || list == nilCell)
{
if(list == (CELL*)cell->contents)
{
cell->contents = (UINT)newCell;
newCell->next = list;
}
else
{
cell->next = newCell;
newCell->next = list;
}
}
else if(insert == INSERT_AFTER || insert == INSERT_END)
{
cell = list->next;
list->next = newCell;
newCell->next = cell;
}
PUSH_RETURN:
symbolCheck = symbolRef;
pushResultFlag = FALSE;
return(listOrg);
}
CELL * p_pop(CELL * params)
{
CELL * list;
CELL * envelope = NULL; /* suppress bogus warning on some compilers */
CELL * cell;
ssize_t index;
int evalFlag = FALSE;
params = getEvalDefault(params, &list);
if(symbolCheck && isProtected(symbolCheck->flags))
return(errorProcExt2(ERR_SYMBOL_PROTECTED, stuffSymbol(symbolCheck)));
if(!isList(list->type))
{
if(list->type == CELL_STRING)
return(popString(list, params));
else
return(errorProcExt(ERR_LIST_OR_STRING_EXPECTED, list));
}
/* no index, popping first */
if(params == nilCell)
{
cell = (CELL *)list->contents;
list->contents = (UINT)cell->next;
if(cell->next == nilCell) /* check if only one element in list */
list->aux = (UINT)nilCell; /* undo last element optimization */
cell->next = nilCell;
return(cell);
}
else
{
cell = (CELL*)params->next;
params = evaluateExpression(params);
if(isList(params->type))
{
evalFlag = FALSE;
params = getIntegerExt((CELL*)params->contents, (UINT*)&index, FALSE);
}
else
{
evalFlag = TRUE;
getIntegerExt(params, (UINT*)&index, FALSE);
params = cell;
}
}
/* pop with index */
while(isList(list->type))
{
cell = envelope = list;
list = (CELL *)list->contents;
if(index < 0) index = convertNegativeOffset(index, list);
while(index--)
{
cell = list;
list = list->next;
}
if(list == nilCell)
errorProc(ERR_LIST_INDEX_INVALID);
if(params == nilCell || !isList(list->type)) break;
params = getIntegerExt(params, (UINT*)&index, evalFlag);
}
if(list->next == nilCell) /* last cell is popped */
{
if(list == (CELL*)cell->contents) /* last is also first cell */
envelope->aux = (UINT)nilCell;
else
envelope->aux = (UINT)cell; /* cell is previous to last popped */
}
if(list == (CELL*)cell->contents)
cell->contents = (UINT)list->next;
else
cell->next = list->next;
list->next = nilCell;
return(list);
}
CELL * popString(CELL * str, CELL * params)
{
char * ptr;
char * newPtr;
ssize_t index = 0;
ssize_t len = 1;
ssize_t size;
CELL * result;
ptr = (char *)str->contents;
#ifdef SUPPORT_UTF8
size = utf8_wlen(ptr, (char *)str->contents + str->aux);
#else
size = str->aux - 1;
#endif
if(str->aux < 2)
return(stuffString(""));
if(params != nilCell)
{
params = getInteger(params, (UINT*)&index);
if(params != nilCell)
{
getInteger(params, (UINT*)&len);
if(len < 1) len = 0;
}
}
index = adjustNegativeIndex(index, size);
if((index + len) > size)
len = size - index;
#ifdef SUPPORT_UTF8
newPtr = utf8_index(ptr, index);
index = newPtr - ptr;
newPtr = utf8_index(newPtr, len);
len = newPtr - ptr;
if(len > str->aux - 1)
return(errorProc(ERR_INVALID_UTF8));
len -= index;
#endif
newPtr = callocMemory(str->aux - len);
memcpy(newPtr, ptr, index);
memcpy(newPtr + index, ptr + index + len, str->aux - len - index);
str->aux = str->aux - len;
str->contents = (UINT)newPtr;
result = stuffStringN(ptr + index, len);
free(ptr);
return(result);
}
CELL * pushOnString(CELL * newStr, CELL * str, CELL * idx)
{
ssize_t index = 0;
char * ptr;
char * newPtr;
int len;
#ifdef SUPPORT_UTF8
char * sptr;
#endif
if(idx != nilCell) getInteger(idx, (UINT*)&index);
ptr = (char *)str->contents;
if(newStr->type != CELL_STRING)
return(errorProcExt(ERR_STRING_EXPECTED, newStr));
if(index == -1)
{
appendCellString(str, (char *)newStr->contents, newStr->aux - 1);
return(newStr);
}
#ifndef SUPPORT_UTF8
len = str->aux - 1;
#else
len = utf8_wlen(ptr, ptr + str->aux);
#endif
/* convert index into characters to skip before the new one is inserted */
if(index < 0) index = len + index + 1;
else if(index > len) index = len;
if(index < 0) index = 0;
newPtr = callocMemory(str->aux + newStr->aux - 1);
#ifndef SUPPORT_UTF8
memcpy(newPtr, ptr, index);
memcpy(newPtr + index, (char*)newStr->contents, newStr->aux - 1);
memcpy(newPtr + index + newStr->aux - 1, ptr + index, str->aux - index);
#else
sptr = utf8_index(ptr, index);
memcpy(newPtr, ptr, sptr - ptr);
memcpy(newPtr + (sptr - ptr), (char*)newStr->contents, newStr->aux - 1);
memcpy(newPtr + (sptr - ptr) + newStr->aux - 1, sptr, str->aux - (sptr - ptr) );
#endif
str->contents = (UINT)newPtr;
str->aux = str->aux + newStr->aux - 1;
*(newPtr + str->aux - 1) = 0;
free(ptr);
return(newStr);
}
CELL * p_select(CELL * params)
{
size_t n = 0, idx = 0;
ssize_t index;
CELL * list, * cell;
CELL * result = NULL;
CELL * head;
int evalFlag = TRUE;
char * str, * newStr;
#ifdef SUPPORT_UTF8
int * wstr;
int * wnewStr;
size_t len;
#endif
params = getEvalDefault(params, &head);
cell = evaluateExpression(params);
if(isList(cell->type))
{
evalFlag = FALSE;
cell = params = (CELL *)cell->contents;
}
if(head->type == CELL_STRING)
{
if((n = listlen(params)) == 0) return(stuffString(""));
str = (char *)head->contents;
#ifndef SUPPORT_UTF8
newStr = (char *)allocMemory(n + 1);
idx = 0;
while(params->type != CELL_NIL)
{
if(idx == 0)
{
getIntegerExt(cell, (UINT *)&index, FALSE);
params = params->next;
}
else
params = getIntegerExt(params, (UINT *)&index, evalFlag);
index = adjustNegativeIndex(index, head->aux -1);
*(newStr + idx++) = *(str + index);
}
*(newStr + n) = 0;
#else
wstr = allocMemory(head->aux * sizeof(int));
len = utf8_wstr(wstr, str, head->aux - 1);
wnewStr = allocMemory((n + 1) * sizeof(int));
idx = 0;
while(params->type != CELL_NIL)
{
if(idx == 0)
{
getIntegerExt(cell, (UINT *)&index, FALSE);
params = params->next;
}
else
params = getIntegerExt(params, (UINT *)&index, evalFlag);
index = adjustNegativeIndex(index, len);
*(wnewStr + idx++) = *(wstr + index);
}
*(wnewStr + n) = 0;
newStr = allocMemory(UTF8_MAX_BYTES * n + 1);
n = wstr_utf8(newStr, wnewStr, UTF8_MAX_BYTES * n);
newStr = reallocMemory(newStr, n + 1);
free(wstr); free(wnewStr);
#endif
result = getCell(CELL_STRING);
result->aux = n + 1;
result->contents = (UINT)newStr;
return(result);
}
if(!isList(head->type))
return(errorProcExt(ERR_LIST_OR_STRING_EXPECTED, head));
head = (CELL *)head->contents;
list = head;
n = 0;
while(params->type != CELL_NIL)
{
if(n++ == 0)
{
getIntegerExt(cell, (UINT *)&index, FALSE);
params = params->next;
}
else
params = getIntegerExt(params, (UINT *)&index, evalFlag);
if(index < 0) index = convertNegativeOffset(index, head);
if(index < idx) list = head, idx = 0;
while(idx < index && list != nilCell) list = list->next, idx++;
if(list == nilCell)
errorProc(ERR_LIST_INDEX_INVALID);
if(result == NULL)
{
result = getCell(CELL_EXPRESSION);
cell = copyCell(list);
result->contents = (UINT)cell;
}
else
{
cell->next = copyCell(list);
cell = cell->next;
}
}
return((result == NULL) ? getCell(CELL_EXPRESSION) : result);
}
CELL * p_slice(CELL * params)
{
CELL * cell;
ssize_t offset;
ssize_t length;
params = getEvalDefault(params, &cell);
params = getInteger(params, (UINT *)&offset);
if(params != nilCell)
getInteger(params, (UINT *)&length);
else
length = MAX_LONG;
if(isList(cell->type))
return(sublist((CELL *)cell->contents, offset, length));
else if(cell->type == CELL_STRING)
return(substring((char *)cell->contents, cell->aux - 1, offset, length));
else if(cell->type == CELL_ARRAY)
return(subarray(cell, offset, length));
return(errorProcExt(ERR_LIST_OR_STRING_EXPECTED, params));
}
CELL * sublist(CELL * list, ssize_t offset, ssize_t length)
{
CELL * subList;
CELL * cell;
if(offset < 0)
offset = convertNegativeOffset(offset, list);
if(length < 0)
{
length = listlen(list) - offset + length;
if(length < 0) length = 0;
}
subList = getCell(CELL_EXPRESSION);
if(length == 0) return(subList);
while(offset-- && list != nilCell)
list = list->next;
if(list == nilCell) return(subList);
cell = copyCell(list);
subList->contents = (UINT)cell;
--length;
while(length--)
{
list = list->next;
if(list == nilCell) break;
cell->next = copyCell(list);
cell = cell->next;
}
return(subList);
}
CELL * p_reverse(CELL * params)
{
CELL * cell;
CELL * list;
CELL * previous;
CELL * next;
char * str;
char * left;
char * right;
CELL * * addr;
CELL * * leftA;
CELL * * rightA;
size_t len, tmp;
cell = params;
getEvalDefault(params, &list);
if(symbolCheck && isProtected(symbolCheck->flags))
return(errorProcExt2(ERR_SYMBOL_PROTECTED, stuffSymbol(symbolCheck)));
if(isList(list->type))
{
list->aux = (UINT)nilCell; /* undo last element optimization */
previous = cell = (CELL*)list->contents;
next = cell->next;
cell->next = nilCell;
while(cell!= nilCell)
{
previous = cell;
cell = next;
next = cell->next;
if(cell != nilCell) cell->next = previous;
}
list->contents = (UINT)previous;
}
else if(list->type == CELL_STRING)
{
str = (char *)list->contents;
len = list->aux - 1;
left = str;
right = left + len - 1;
while(left < right)
{
tmp = *left;
*left = *right;
*right = tmp;
left++;
right--;
}
}
else if(list->type == CELL_ARRAY)
{
addr = (CELL * *)list->contents;
len = (list->aux - 1) / sizeof(UINT);
leftA = addr;
rightA = leftA + len - 1;
while(leftA < rightA)
{
cell = *leftA;
*leftA = *rightA;
*rightA = cell;