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// license:GPL-2.0+
// copyright-holders:Couriersud
/*
* nl_string.c
*
*/
#include "pstring.h"
#include <cstdio>
#include <stdlib.h>
// The following will work on linux, however not on Windows ....
//pblockpool *pstring::m_pool = new pblockpool;
//pstring::str_t *pstring::m_zero = new(pstring::m_pool, 0) pstring::str_t(0);
pblockpool pstring::m_pool;
pstring::str_t pstring::m_zero;
/*
* Uncomment the following to override defaults
*/
//#define IMMEDIATE_MODE (1)
//#define DEBUG_MODE (0)
#ifdef MAME_DEBUG
#ifndef IMMEDIATE_MODE
#define IMMEDIATE_MODE (1)
#endif
#ifndef DEBUG_MODE
#define DEBUG_MODE (0)
#endif
#else
#ifndef IMMEDIATE_MODE
#define IMMEDIATE_MODE (1)
#endif
#ifndef DEBUG_MODE
#define DEBUG_MODE (0)
#endif
#endif
pstring::~pstring()
{
sfree(m_ptr);
}
void pstring::pcat(const char *s)
{
int slen = strlen(s);
str_t *n = salloc(m_ptr->len() + slen);
if (m_ptr->len() > 0)
memcpy(n->str(), m_ptr->str(), m_ptr->len());
if (slen > 0)
memcpy(n->str() + m_ptr->len(), s, slen);
*(n->str() + n->len()) = 0;
sfree(m_ptr);
m_ptr = n;
}
void pstring::pcopy(const char *from, int size)
{
str_t *n = salloc(size);
if (size > 0)
memcpy(n->str(), from, size);
*(n->str() + size) = 0;
sfree(m_ptr);
m_ptr = n;
}
pstring pstring::substr(unsigned int start, int count) const
{
int alen = len();
if (start >= alen)
return pstring();
if (count <0 || start + count > alen)
count = alen - start;
pstring ret;
ret.pcopy(cstr() + start, count);
return ret;
}
pstring pstring::ucase() const
{
pstring ret = *this;
ret.pcopy(cstr(), len());
for (int i=0; i<ret.len(); i++)
ret.m_ptr->m_str[i] = toupper((unsigned) ret.m_ptr->m_str[i]);
return ret;
}
int pstring::find_first_not_of(const pstring no) const
{
for (int i=0; i < len(); i++)
{
bool f = true;
for (int j=0; j < no.len(); j++)
if (m_ptr->m_str[i] == no.m_ptr->m_str[j])
f = false;
if (f)
return i;
}
return -1;
}
int pstring::find_last_not_of(const pstring no) const
{
for (int i=len() - 1; i >= 0; i--)
{
bool f = true;
for (int j=0; j < no.len(); j++)
if (m_ptr->m_str[i] == no.m_ptr->m_str[j])
f = false;
if (f)
return i;
}
return -1;
}
pstring pstring::replace(const pstring &search, const pstring &replace)
{
pstring ret = "";
if (search.len() == 0)
return *this;
int i = 0;
while (i<len())
{
if (strncmp(cstr()+i,search.cstr(),search.len()) == 0)
{
ret += replace;
i += search.len();
}
else
{
ret += *(cstr() + i);
i++;
}
}
return ret;
}
pstring pstring::ltrim(const pstring ws) const
{
int f = find_first_not_of(ws);
if (f>=0)
return substr(f);
else
return "";
}
pstring pstring::rtrim(const pstring ws) const
{
int f = find_last_not_of(ws);
if (f>=0)
return left(f+1);
else
return "";
}
//-------------------------------------------------
// pcmpi - compare a character array to an nstring
//-------------------------------------------------
int pstring::pcmpi(const char *lhs, const char *rhs, int count) const
{
// loop while equal until we hit the end of strings
int index;
for (index = 0; index < count; index++)
if (lhs[index] == 0 || tolower(lhs[index]) != tolower(rhs[index]))
break;
// determine the final result
if (index < count)
return tolower(lhs[index]) - tolower(rhs[index]);
if (lhs[index] == 0)
return 0;
return 1;
}
nl_double pstring::as_double(bool *error) const
{
nl_double ret;
char *e = NULL;
if (error != NULL)
*error = false;
ret = strtod(cstr(), &e);
if (*e != 0)
if (error != NULL)
*error = true;
return ret;
}
long pstring::as_long(bool *error) const
{
nl_double ret;
char *e = NULL;
if (error != NULL)
*error = false;
if (startsWith("0x"))
ret = strtol(&(cstr()[2]), &e, 16);
else
ret = strtol(cstr(), &e, 10);
if (*e != 0)
if (error != NULL)
*error = true;
return ret;
}
pstring pstring::vprintf(va_list args) const
{
// sprintf into the temporary buffer
char tempbuf[4096];
vsprintf(tempbuf, cstr(), args);
return pstring(tempbuf);
}
// ----------------------------------------------------------------------------------------
// static stuff ...
// ----------------------------------------------------------------------------------------
void pstring::sfree(str_t *s)
{
s->m_ref_count--;
if (s->m_ref_count == 0 && s != &m_zero)
m_pool.dealloc(s);
}
pstring::str_t *pstring::salloc(int n)
{
str_t *ret = new(m_pool, n+1) str_t(n);
return ret;
}
pstring pstring::sprintf(const char *format, ...)
{
va_list ap;
va_start(ap, format);
pstring ret = pstring(format).vprintf(ap);
va_end(ap);
return ret;
}
void pstring::resetmem()
{
// Release the 0 string
m_pool.m_shutdown = true;
m_pool.resetmem();
}
// ----------------------------------------------------------------------------------------
// block allocation pool
// ----------------------------------------------------------------------------------------
pblockpool::pblockpool()
: m_shutdown(false)
, m_first(NULL)
, m_blocksize((DEBUG_MODE) ? 16384 : 16384)
, m_align(8)
{
}
pblockpool::~pblockpool()
{
}
void *pblockpool::alloc(const std::size_t n)
{
if (IMMEDIATE_MODE)
return (char *) malloc(n);
else
{
int memsize = ((n + m_align - 1) / m_align) * m_align;
int min_alloc = MAX(m_blocksize, memsize+sizeof(memblock)-MINDATASIZE);
char *ret = NULL;
//std::printf("m_first %p\n", m_first);
for (memblock *p = m_first; p != NULL && ret == NULL; p = p->next)
{
if (p->remaining > memsize)
{
ret = p->cur;
p->cur += memsize;
p->allocated += 1;
p->remaining -= memsize;
}
}
if (ret == NULL)
{
// need to allocate a new block
memblock *p = (memblock *) malloc(min_alloc); //new char[min_alloc];
p->allocated = 0;
p->cur = &p->data[0];
p->size = p->remaining = min_alloc - (sizeof(memblock)-MINDATASIZE);
p->next = m_first;
//std::printf("allocated block size %d\n", sizeof(p->data));
ret = p->cur;
p->cur += memsize;
p->allocated += 1;
p->remaining -= memsize;
m_first = p;
}
return ret;
}
}
void pblockpool::dealloc(void *ptr)
{
if (IMMEDIATE_MODE)
free(ptr);
else
{
for (memblock *p = m_first; p != NULL; p = p->next)
{
if (ptr >= &p->data[0] && ptr < &p->data[p->size])
{
p->allocated -= 1;
if (p->allocated < 0)
std::fprintf(stderr, "nstring: memory corruption - crash likely\n");
if (p->allocated == 0)
{
//std::printf("Block entirely freed\n");
p->remaining = p->size;
p->cur = &p->data[0];
}
// shutting down ?
if (m_shutdown)
resetmem(); // try to free blocks
return;
}
}
std::fprintf(stderr, "nstring: string <%p> not found on free\n", ptr);
}
}
void pblockpool::resetmem()
{
if (!IMMEDIATE_MODE)
{
memblock **p = &m_first;
int totalblocks = 0;
int freedblocks = 0;
while (*p != NULL)
{
totalblocks++;
memblock **next = &((*p)->next);
if ((*p)->allocated == 0)
{
//std::printf("freeing block %p\n", *p);
memblock *freeme = *p;
*p = *next;
free(freeme); //delete[] *p;
freedblocks++;
}
else
{
//if (DEBUG_MODE)
// std::printf("Allocated: <%s>\n", ((str_t *)(&(*p)->data[0]))->str());
p = next;
}
}
if (DEBUG_MODE)
std::printf("Freed %d out of total %d blocks\n", freedblocks, totalblocks);
}
}
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