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nl-string.c
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/* nl-string.c
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"
#ifdef SUPPORT_UTF8
#include <wctype.h>
#endif
#define PCRE_STATIC
#include "pcre.h"
#include "protos.h"
extern SYMBOL * sysSymbol[];
extern CELL * countCell;
extern int bigEndian;
extern int pagesize;
#define OVECCOUNT (MAX_REGEX_EXP * 3) /* max sub expressions in PCRE */
void regexError(char * msg_1, int num, const char * msg_2);
pcre * pcreCachedCompile(char * pattern, int options);
CELL * cellTokenString(char * *source, size_t * srclen, char *separator, pcre *re);
#ifdef USE_WIN_UTF16PATH
int open_utf16(const char* a, int b, int c);
#endif
/* ---------------------------- string processing ----------------------- */
int my_strnicmp(char * s1, char * s2, ssize_t size)
{
while(toupper(*s1) == toupper(*s2))
{
if(--size <= 0) return(0);
s1++, s2++;
}
return(toupper(*s1) - toupper(*s2));
}
CELL * substring(char * string, ssize_t slen, ssize_t offset, ssize_t len)
{
if(offset < 0)
{
offset = slen + offset;
if(offset < 0)
return(errorProc(ERR_STRING_INDEX_INVALID));
}
else
offset = (offset > slen) ? slen : offset;
if(len < 0)
{
len = slen - offset + len;
if(len < 0) len = 0;
}
if(len == MAX_LONG)
len = slen - offset;
else
len = ((offset + len) > slen) ? (slen - offset) : len;
return(stuffStringN(string + offset, len));
}
#define SEARCH_SIZE 0x1000
CELL * p_search(CELL * params)
{
UINT fileHandle;
ssize_t bytesRead;
ssize_t position;
int flag = 0;
CELL * next;
#ifdef LFS
off_t filePosition;
off_t foundPosition;
double result;
#else
ssize_t filePosition;
ssize_t foundPosition;
#endif
char * searchString;
char * buffer;
INT options;
size_t len;
params = getInteger(params, (UINT *)&fileHandle);
params = getStringSize(params, &searchString, &len, TRUE);
if(len == 0) return(nilCell);
options = -1;
if(params != nilCell)
{
next = params->next;
params = evaluateExpression(params);
if(isNumber(params->type) || params->type == CELL_STRING)
/* 10.6.1 also accept string for options */
parseRegexOptions(params, (UINT *)&options, FALSE);
else
{
flag = (params->type != CELL_NIL);
if(next != nilCell)
/* 10.6.1 also accept string for options */
parseRegexOptions(next, (UINT *)&options, TRUE);
}
}
buffer = (char *)allocMemory(SEARCH_SIZE + 1);
if((filePosition = lseek((int)fileHandle, 0, SEEK_CUR)) == -1)
return(nilCell);
foundPosition = 0;
do
{
memset(buffer, 0, SEARCH_SIZE + 1);
bytesRead = read((int)fileHandle, buffer, SEARCH_SIZE);
if(options == -1)
position = searchBuffer(buffer, bytesRead, searchString, len, 1);
else
position = searchBufferRegex(buffer, 0, searchString, bytesRead , options, &len);
if(position != -1)
{
if(flag)
foundPosition = filePosition + position + len;
else
foundPosition = filePosition + position;
break;
}
filePosition = filePosition + bytesRead - len;
lseek((int)fileHandle, filePosition, SEEK_SET);
} while (bytesRead == SEARCH_SIZE);
freeMemory(buffer);
if(position == -1) return(nilCell);
lseek((int)fileHandle, foundPosition, SEEK_SET);
#ifdef LFS
result = foundPosition;
return(stuffFloat(result));
#else
return(stuffInteger(foundPosition));
#endif
}
/* returns a new string cell */
CELL * implicitIndexString(CELL * cell, CELL * params)
{
ssize_t index;
char * ptr;
#ifndef SUPPORT_UTF8
char str[2];
#else
ssize_t p;
#endif
ptr = (char*)cell->contents;
getInteger(params, (UINT *)&index);
stringCell = cell;
if(cell->aux == 1 && (index == 0 || index == -1))
return(copyCell(cell));
#ifndef SUPPORT_UTF8
index = adjustNegativeIndex(index, cell->aux - 1);
str[0] = *(ptr + index);
str[1] = 0;
stringIndexPtr = ptr + index;
return(stuffStringN(str, 1));
#else
index = adjustNegativeIndex(index, utf8_wlen(ptr, ptr + cell->aux));
ptr = utf8_index(ptr, index);
p = utf8_1st_len(ptr);
if(ptr + p > (char *)cell->contents + cell->aux)
return(errorProc(ERR_INVALID_UTF8));
stringIndexPtr = ptr;
return(stuffStringN(ptr, p));
#endif
}
/* only used from setf() for string insertion
uses the global stringIndexPtr in insertPtr
the insert point set by implicitIndexString()
modifies cellStr with new and returns new
*/
CELL * setNthStr(CELL * cellStr, CELL * new, char * insertPtr)
{
char * newStr;
char * oldStr;
size_t newLen, oldLen, len, offset;
char * str;
getStringSize(new, &newStr, &newLen, FALSE);
oldStr = (char*)cellStr->contents;
oldLen = cellStr->aux - 1;
if(oldLen == 0) return(copyCell(cellStr));
#ifdef SUPPORT_UTF8
len = utf8_1st_len(insertPtr);
#else
len = 1;
#endif
str = callocMemory(oldLen + newLen - len + 1);
offset = insertPtr - oldStr;
memcpy(str, oldStr, offset);
memcpy(str + offset, newStr, newLen);
memcpy(str + offset + newLen, oldStr + offset + len, oldLen - offset - len);
cellStr->contents = (UINT)str;
cellStr->aux = oldLen + newLen - len + 1;
freeMemory(oldStr);
return(new);
}
CELL * p_char(CELL * params)
{
char * string;
ssize_t offset;
size_t len;
int num;
CELL * datCell;
char buff[2];
if(params == nilCell)
return(errorProc(ERR_MISSING_ARGUMENT));
params = getEvalDefault(params, &datCell);
switch(datCell->type)
{
case CELL_STRING:
symbolCheck = NULL;
stringCell = NULL; /* 10.7.6 see also setf() */
string = (char *)datCell->contents;
#ifndef SUPPORT_UTF8
len = (size_t)datCell->aux - 1;
if(len == 0) return(nilCell);
#else
len = utf8_wlen(string, string + datCell->aux);
if(len == 0)
{
if(datCell->aux - 1 == 0)
return(nilCell);
else
return(stuffInteger(0));
}
#endif
if(params != nilCell)
{
params = getInteger(params, (UINT*)&offset);
#ifdef SUPPORT_UTF8
if(getFlag(params)) /* treat as offset into 8-bit array */
{
offset = adjustNegativeIndex(offset, (size_t)datCell->aux - 1);
return(stuffInteger((UINT)*((unsigned char *)string + (UINT)offset)));
}
#endif
}
else offset = 0;
offset = adjustNegativeIndex(offset, (size_t)len);
#ifndef SUPPORT_UTF8
return(stuffInteger((UINT)*((unsigned char *)string + (UINT)offset)));
case CELL_LONG:
buff[0] = (int)datCell->contents;
break;
#ifndef NEWLISP64
case CELL_INT64:
num = *(INT64 *)&datCell->aux;
buff[0] = num;
break;
case CELL_FLOAT:
num = *(double*)&datCell->aux;
buff[0] = num;
#else /* NEWLISP64 */
case CELL_FLOAT:
num = *(double*)&datCell->contents;
buff[0] = num;
#endif /* NEWLISP64 */
break;
#else /* SUPPORT_UTF8 */
while(offset--) string += utf8_1st_len(string);
utf8_wchar(string, &num);
return(stuffInteger(num));
#ifndef NEWLISP64
case CELL_FLOAT:
case CELL_LONG:
case CELL_INT64:
string = allocMemory(UTF8_MAX_BYTES + 1);
if(datCell->type == CELL_FLOAT)
num = *(double*)&datCell->aux;
else if(datCell->type == CELL_INT64)
num = *(INT64 *)&datCell->aux;
else
num = datCell->contents;
#else /* NEWLISP64 */
case CELL_FLOAT:
case CELL_LONG:
string = allocMemory(UTF8_MAX_BYTES + 1);
if(datCell->type == CELL_FLOAT)
num = *(double*)&datCell->contents;
else
num = (int)datCell->contents;
#endif /* NEWLISP 64 */
len = wchar_utf8(num, string);
datCell = stuffStringN(string, len);
free(string);
return(datCell);
#endif /* SUPPORT_UTF8 */
default:
buff[0] = 0;
}
return(stuffStringN(buff, 1));
}
CELL * p_explode(CELL * params)
{
char * string;
CELL * cell;
CELL * result;
ssize_t size;
ssize_t len = 1;
int flag = 0;
#ifdef SUPPORT_UTF8
int clen;
char * ptr;
#endif
params = getEvalDefault(params, &cell);
if(isList(cell->type))
return(explodeList((CELL*)cell->contents, params));
if(cell->type == CELL_STRING)
{
string = (char *)cell->contents;
size = cell->aux - 1;
}
else
return(errorProcExt(ERR_LIST_OR_STRING_EXPECTED, cell));
if(params != nilCell)
{
params = getInteger(params, (UINT *)&len);
flag = getFlag(params);
if(!flag && len > size) len = size;
}
result = cell = getCell(CELL_EXPRESSION);
if(size == 0 || len <= 0) return(result);
#ifndef SUPPORT_UTF8
if(flag && size < len) return(result);
cell->contents = (UINT)stuffStringN(string, len);
cell = (CELL *)cell->contents;
string += len;
while((size -= len) > 0)
{
if(flag && size < len) break;
cell->next = stuffStringN(string, (size >= len) ? len : size);
cell = cell->next;
string += len;
}
#else
size = utf8_wlen(string, string + size + 1);
ptr = utf8_index(string, len);
clen = ptr - string;
if(flag && size < len) return(result);
cell->contents = (UINT)stuffStringN(string, clen);
cell = (CELL *)cell->contents;
string += clen;
while((size -= len) > 0)
{
if(flag && size < len) break;
ptr = utf8_index(string, len);
clen = ptr - string;
cell->next = stuffStringN(string, clen);
cell = cell->next;
string += clen;
}
#endif
return(result);
}
#define STR_LOWER 0
#define STR_UPPER 1
#define STR_TITLE 2
CELL * strUpperLower(CELL * params, int type)
{
#ifndef SUPPORT_UTF8
char * string;
char * ptr;
#else
char * utf8str;
int * unicode;
int * ptr;
size_t size;
#endif
CELL * cell;
int option = FALSE;
#ifndef SUPPORT_UTF8
params = getString(params, &string);
option = getFlag(params);
cell = stuffString(string);
ptr = (void *)cell->contents;
if(type == STR_UPPER)
while(*ptr) { *ptr = toupper(*ptr); ptr++; }
else
{
if(type == STR_TITLE)
if(*ptr) { *ptr = toupper(*ptr); ptr++; }
if(((type == STR_TITLE) && option) || (type == STR_LOWER))
while(*ptr) { *ptr = tolower(*ptr); ptr++; }
}
#else
params = getStringSize(params, &utf8str, &size, TRUE);
option = getFlag(params);
size = utf8_wlen(utf8str, utf8str + size + 1);
unicode = allocMemory((size + 1) * sizeof(int));
size = utf8_wstr(unicode, utf8str, size);
ptr = unicode;
/* Note that on many platforms towupper/towlower
do not work correctly for non-ascii unicodes */
if(type == STR_UPPER)
while(*ptr) { *ptr = towupper(*ptr); ptr++; }
else
{
if(type == STR_TITLE)
if(*ptr) { *ptr = towupper(*ptr); ptr++; }
if(((type == STR_TITLE) && option) || (type == STR_LOWER))
while(*ptr) { *ptr = towlower(*ptr); ptr++; }
}
utf8str = allocMemory(size * UTF8_MAX_BYTES + 1);
size = wstr_utf8(utf8str, unicode, size * UTF8_MAX_BYTES + 1);
utf8str = reallocMemory(utf8str, size + 1);
free(unicode);
return(makeStringCell(utf8str, size));
#endif
return(cell);
}
CELL * p_upper(CELL * params) {return(strUpperLower(params, STR_UPPER));}
CELL * p_lower(CELL * params) {return(strUpperLower(params, STR_LOWER));}
CELL * p_title(CELL * params) {return(strUpperLower(params, STR_TITLE));}
char * getFormatType(char * fmt, int * type)
{
PARSE_FORMAT:
/* get % */
while(*fmt != '%' && *fmt != 0) fmt++;
if(*fmt == 0)
{
*type = 0;
return(fmt);
}
fmt++;
/* is it double %% for '%' */
if(*fmt == '%')
{
fmt++;
goto PARSE_FORMAT;
}
/* get optional decimal format spec */
/* this GNU extension does not work on FreeBSD, OpenBSD */
/* works on OSX 10.9, Linux and Unix with GNU libc or alike */
if(*fmt == '\'') fmt++;
/* get width spec */
/* force + before numbers */
if(*fmt == '+')
fmt++;
else
{
/* left align numbers or strings */
if(*fmt == '-')
{
fmt++;
/* force + before numbers */
if(*fmt == '+') fmt++;
}
}
while(isdigit((int)*fmt) && *fmt != 0) fmt++;
if(*fmt == 0) return(NULL);
/* its a float or string with dot precision*/
if(*fmt == '.')
{
fmt++;
while(isdigit((int)*fmt) && *fmt !=0) fmt++;
if(*fmt == 0) return(NULL);
if(*fmt == 'f' || *fmt == 'g' || *fmt =='G' || *fmt == 'e' || *fmt == 'E')
{
*type = CELL_FLOAT;
return(++fmt);
}
if(*fmt == 's')
{
*type = CELL_STRING;
return(++fmt);
}
else return(NULL);
}
/* its a float without dot */
if(*fmt == 'f' || *fmt == 'g' || *fmt =='G' || *fmt == 'e' || *fmt == 'E')
{
*type = CELL_FLOAT;
return(++fmt);
}
/* its an integer or character */
#ifdef TRU64
if(*fmt == 'd' || *fmt == 'i' || *fmt == 'u' || *fmt == 'x' || *fmt == 'X' || *fmt == 'c' || *fmt == 'o')
#else
if(*fmt == 'd' || *fmt == 'u' || *fmt == 'x' || *fmt == 'X' || *fmt == 'c' || *fmt == 'o')
#endif
{
#ifdef TRU64
#ifndef NEWLISP64
*type = CELL_INT64;
#else
*type = CELL_LONG;
#endif
#else
*type = CELL_LONG;
#endif
return(++fmt);
}
/* its a string */
if(*fmt == 's')
{
*type = CELL_STRING;
return(++fmt);
}
/* supporting ld, li, lu, lx, lX formats */
if(*fmt == 'l' && (*(fmt + 1) == 'd' || *(fmt + 1) == 'i' || *(fmt + 1) == 'u' || *(fmt + 1) =='x' || *(fmt + 1) == 'X'))
{
#ifndef NEWLISP64
*type = CELL_INT64;
#else
*type = CELL_LONG;
#endif
return(fmt+2);
}
#ifndef TRUE64 /* UNIX except TRUE64 and WINDOWS MINGW suporting lld, llu, llx, llX formats */
if(*fmt == 'l' && *(fmt + 1) == 'l' && (*(fmt + 2) == 'd' || *(fmt + 2) == 'u' || *(fmt + 2) =='x' || *(fmt + 2) == 'X'))
{
#ifndef NEWLISP64
*type = CELL_INT64;
#else
*type = CELL_LONG;
#endif
return(fmt+3);
}
#endif
#ifdef WINDOWS /* on MINGW also support MS conventions */
if(memcmp(fmt, "I64", 3) == 0 &&
(*(fmt + 3) == 'd' || *(fmt + 3) == 'u' || *(fmt + 3) =='x' || *(fmt + 3) == 'X'))
{
#ifndef NEWLISP64
*type = CELL_INT64;
#else
*type = CELL_LONG;
#endif
return(fmt+4);
}
#endif
/* L and q seem not to be suported on most GCC although in the docs
if(*fmt == 'L' && (*(fmt + 1) == 'd' || *(fmt + 1) =='x' || *(fmt + 1) == 'X'))
{
*type = CELL_INT64;
return(fmt+3);
}
*/
/* its a wchar_t unicode string */
if(*fmt == 'l' && *(fmt + 1) == 's')
{
*type = CELL_STRING;
return(fmt+2);
}
return(NULL);
}
CELL * p_format(CELL * params)
{
char * format;
char * fmt;
char * nextfmt;
CELL * cell;
STREAM fmtStream = {NULL, NULL, 0, 14, 0};
int fType;
double floatNum;
UINT intNum;
#ifndef NEWLISP64
INT64 bigNum;
#endif
int evalFlag = TRUE;
char saveChar;
params = getString(params, &format);
fmt = format;
fmtStream.buffer = fmtStream.ptr = callocMemory(15);
while(params->type != CELL_NIL)
{
/* printf("entry>%s<\n", fmt); */
nextfmt = getFormatType(fmt, &fType);
/* printf("exit>%s<\n", nextfmt); */
if(nextfmt == NULL)
{
closeStrStream(&fmtStream);
return(errorProcExt2(ERR_FORMAT_STRING, stuffString(format)));
}
if(evalFlag)
cell = evaluateExpression(params);
else
cell = params;
if(cell->type == CELL_EXPRESSION && fmt == format)
{
params = (CELL *)cell->contents;
evalFlag = FALSE;
cell = params;
}
if(fType == 0)
{
closeStrStream(&fmtStream);
return(errorProcExt(ERR_NUM_ARGS, params));
}
saveChar = *nextfmt;
*nextfmt = 0;
if(fType == CELL_LONG)
{
if(isNumber(cell->type))
cell = getIntegerExt(cell, &intNum, FALSE);
else goto FORMAT_DATA_ERROR;
varPrintf((UINT)&fmtStream, fmt, intNum);
goto NEXT_FORMAT;
}
#ifndef NEWLISP64
if(fType == CELL_INT64)
{
if(isNumber(cell->type))
cell = getInteger64Ext(cell, &bigNum, TRUE);
else goto FORMAT_DATA_ERROR;
varPrintf((UINT)&fmtStream, fmt, bigNum);
goto NEXT_FORMAT;
}
#endif
if(fType == CELL_FLOAT)
{
if(cell->type == CELL_FLOAT)
#ifndef NEWLISP64
floatNum = *(double *)&cell->aux;
else if(cell->type == CELL_INT64)
floatNum = *(INT64 *)&cell->aux;
#else
floatNum = *(double *)&cell->contents;
#endif
else if(cell->type == CELL_LONG)
floatNum = (INT)cell->contents;
#ifdef BIGINT
else if(cell->type == CELL_BIGINT)
floatNum = bigintCellToFloat(cell);
#endif
else goto FORMAT_DATA_ERROR;
varPrintf((UINT)&fmtStream, fmt, floatNum);
goto NEXT_FORMAT;
}
if(fType != cell->type)
goto FORMAT_DATA_ERROR;
/* printf("stream>%s< with >%s<\n", (char *)cell->contents, fmt); */
varPrintf((UINT)&fmtStream, fmt, cell->contents);
NEXT_FORMAT:
*nextfmt = saveChar;
fmt = nextfmt;
params = params->next;
continue;
FORMAT_DATA_ERROR:
*nextfmt = saveChar;
closeStrStream(&fmtStream);
return(errorProcExt(ERR_FORMAT_DATA_TYPE, params));
}
getFormatType(fmt, &fType);
if(fType != 0)
{
closeStrStream(&fmtStream);
errorProcExt2(ERR_NUM_ARGS, stuffString(format));
}
varPrintf((UINT)&fmtStream, fmt);
cell = makeStringCell(fmtStream.buffer, fmtStream.position);
symbolCheck = NULL;
return(cell);
}
void openStrStream(STREAM * stream, size_t buffSize, int reopenFlag)
{
if(stream->buffer != NULL && reopenFlag)
{
if(buffSize == stream->size)
{
memset(stream->buffer, 0, buffSize);
stream->position = stream->handle = 0;
stream->ptr = stream->buffer;
return;
}
}
freeMemory(stream->buffer);
stream->buffer = stream->ptr = callocMemory(buffSize + 1);
stream->size = buffSize;
stream->position = stream->handle = 0;
}
void closeStrStream(STREAM * stream)
{
if(stream->buffer != NULL)
freeMemory(stream->buffer);
stream->buffer = stream->ptr = NULL;
stream->size = stream->position = 0;
if(stream->handle != 0)
{
close((int)stream->handle);
stream->handle = 0;
}
}
char * cellToString(CELL * cell, size_t * size, int quoteFlag)
{
static STREAM strStream = {NULL, NULL, 0, 0, 0};
if(cell->type == CELL_STRING)
{
*size = cell->aux -1;
return((char *)cell->contents);
}
openStrStream(&strStream, MAX_STRING, TRUE);
prettyPrintFlags |= PRETTYPRINT_STRING;
printCell(cell , quoteFlag, (UINT)&strStream);
prettyPrintFlags &= ~PRETTYPRINT_STRING;
*size = strStream.position;
return(strStream.buffer);
}
void writeStreamChar(STREAM * stream, char chr)
{
if(stream->position == stream->size)
{
stream->size += stream->size / 2;
stream->buffer = reallocMemory(stream->buffer, stream->size + 1);
memset(stream->buffer + stream->position, 0, stream->size - stream->position + 1);
stream->ptr = stream->buffer + stream->position;
}
*(stream->ptr++) = chr;
stream->position++;
}
void writeStreamStr(STREAM * stream, char * buff, size_t length)
{
size_t newPosition;
if(length == 0) length = strlen(buff);
newPosition = stream->position + length;
if(newPosition >= stream->size)
{
while(newPosition >= stream->size)
stream->size += stream->size / 2;
stream->buffer = reallocMemory(stream->buffer, stream->size + 1);
memset(stream->buffer + stream->position, 0, stream->size - stream->position + 1);
stream->ptr = stream->buffer + stream->position;
}
memcpy(stream->ptr, buff, length);
stream->ptr += length;
stream->position = newPosition;
}
/* creates a memory buffer and reads byte into it until
the [/text] is found
*/
#define LLEN 7
#define LIMIT "[/text]"
char * readStreamText(STREAM * stream, int * size)
{
STREAM outStream = {NULL, NULL, 0, 0, 0};
ssize_t findPos = -1;
size_t searchLen;
char * result;
openStrStream(&outStream, MAX_STRING, 0);
while(findPos == -1)
{
if((searchLen = strlen(stream->ptr)) < LLEN)
break;
findPos = searchBuffer(stream->ptr, searchLen, LIMIT, LLEN, TRUE);
if(findPos != -1)
{
if(findPos > 0)
writeStreamStr(&outStream, stream->ptr, findPos);
stream->ptr += findPos + LLEN;
result = allocMemory(outStream.position + 1);
memcpy(result, outStream.buffer, outStream.position);
*size = outStream.position;
*(result + outStream.position) = 0;
closeStrStream(&outStream);
return(result);
}
writeStreamStr(&outStream, stream->ptr, searchLen - LLEN);
stream->position += (stream->ptr - stream->buffer);
stream->position += searchLen - LLEN;
if(stream->handle == 0) /* its not a file */
{
stream->buffer = stream->ptr;
break;
}
else
{
if(searchLen == LLEN) break;
lseek(stream->handle, stream->position, SEEK_SET);
memset(stream->buffer, 0, stream->size + 1);
if(read(stream->handle, stream->buffer, stream->size) > 0)
stream->ptr = stream->buffer;
else
{
*stream->ptr = 0;
break;
}
}
}
closeStrStream(&outStream);
return(NULL);
}
/* this is only used for reading with getToken()
stream->size does not reflect the real size of
the buffer as in makeStreamFromFile()
*/
int makeStreamFromString(STREAM * stream, char * str)
{
int len = strlen(str);
stream->handle = stream->position = 0;
stream->buffer = stream->ptr = str;
/* make getToken work to the end of str */
stream->size = len + 4 * MAX_STRING;
return(len);
}
int makeStreamFromFile(STREAM * stream, char * fileName, size_t size, size_t offset)
{
int result;
if((stream->handle = openFile(fileName, "r", NULL)) == -1)
return(0);
stream->ptr = stream->buffer = (char *)callocMemory(size + 1);
if(offset != 0)
lseek((int)stream->handle, offset, SEEK_SET);
stream->position = offset;
stream->size = size;
/* load first buffer */
if((result = read(stream->handle, stream->buffer, size)) < 0)
{
closeStrStream(stream);
return(0);
}
return(TRUE);
}
ssize_t searchBuffer(char * buffer, size_t length, char * string, size_t size, int caseFlag)
{
size_t position = 0;
if(caseFlag == FALSE)
{
while(position < length)
{
if(toupper(*buffer) == toupper(*string))
if(my_strnicmp(buffer, string, size) == 0) break;
position++;
buffer++;
}
}
else /* case sensitive */
{
while(position < length)
{
if(*buffer == *string)