text: /* $Id: string_i.h 5468 2016-10-24 03:22:46Z nanang $ */
  /* 
   * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
   * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
   *
   * 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 2 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, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
   */
  
  #include <pj/assert.h>
  #include <pj/pool.h>
  
  PJ_IDEF(pj_str_t) pj_str(char *str)
  {
      pj_str_t dst;
      dst.ptr = str;
      dst.slen = str ? pj_ansi_strlen(str) : 0;
      return dst;
  }
  
  PJ_IDEF(pj_str_t*) pj_strdup(pj_pool_t *pool,
  			      pj_str_t *dst,
  			      const pj_str_t *src)
  {
      /* Without this, destination will be corrupted */
      if (dst == src)
  	return dst;
  
      if (src->slen) {
  	dst->ptr = (char*)pj_pool_alloc(pool, src->slen);
  	pj_memcpy(dst->ptr, src->ptr, src->slen);
      }
      dst->slen = src->slen;
      return dst;
  }
  
  PJ_IDEF(pj_str_t*) pj_strdup_with_null( pj_pool_t *pool,
  					pj_str_t *dst,
  					const pj_str_t *src)
  {
      dst->ptr = (char*)pj_pool_alloc(pool, src->slen+1);
      if (src->slen) {
  	pj_memcpy(dst->ptr, src->ptr, src->slen);
      }
      dst->slen = src->slen;
      dst->ptr[dst->slen] = '\0';
      return dst;
  }
  
  PJ_IDEF(pj_str_t*) pj_strdup2(pj_pool_t *pool,
  			      pj_str_t *dst,
  			      const char *src)
  {
      dst->slen = src ? pj_ansi_strlen(src) : 0;
      if (dst->slen) {
  	dst->ptr = (char*)pj_pool_alloc(pool, dst->slen);
  	pj_memcpy(dst->ptr, src, dst->slen);
      } else {
  	dst->ptr = NULL;
      }
      return dst;
  }
  
  PJ_IDEF(pj_str_t*) pj_strdup2_with_null( pj_pool_t *pool,
  					 pj_str_t *dst,
  					 const char *src)
  {
      dst->slen = src ? pj_ansi_strlen(src) : 0;
      dst->ptr = (char*)pj_pool_alloc(pool, dst->slen+1);
      if (dst->slen) {
  	pj_memcpy(dst->ptr, src, dst->slen);
      }
      dst->ptr[dst->slen] = '\0';
      return dst;
  }
  
  PJ_IDEF(pj_str_t) pj_strdup3(pj_pool_t *pool, const char *src)
  {
      pj_str_t temp;
      pj_strdup2(pool, &temp, src);
      return temp;
  }
  
  PJ_IDEF(pj_str_t*) pj_strassign( pj_str_t *dst, pj_str_t *src )
  {
      dst->ptr = src->ptr;
      dst->slen = src->slen;
      return dst;
  }
  
  PJ_IDEF(pj_str_t*) pj_strcpy(pj_str_t *dst, const pj_str_t *src)
  {
      dst->slen = src->slen;
      if (src->slen > 0)
  	pj_memcpy(dst->ptr, src->ptr, src->slen);
      return dst;
  }
  
  PJ_IDEF(pj_str_t*) pj_strcpy2(pj_str_t *dst, const char *src)
  {
      dst->slen = src ? pj_ansi_strlen(src) : 0;
      if (dst->slen > 0)
  	pj_memcpy(dst->ptr, src, dst->slen);
      return dst;
  }
  
  PJ_IDEF(pj_str_t*) pj_strncpy( pj_str_t *dst, const pj_str_t *src, 
  			       pj_ssize_t max)
  {
      pj_assert(max >= 0);
      if (max > src->slen) max = src->slen;
      if (max > 0)
  	pj_memcpy(dst->ptr, src->ptr, max);
      dst->slen = max;
      return dst;
  }
  
  PJ_IDEF(pj_str_t*) pj_strncpy_with_null( pj_str_t *dst, const pj_str_t *src,
  					 pj_ssize_t max)
  {
      pj_assert(max > 0);
  
      if (max <= src->slen)
  	max = max-1;
      else
  	max = src->slen;
  
      pj_memcpy(dst->ptr, src->ptr, max);
      dst->ptr[max] = '\0';
      dst->slen = max;
      return dst;
  }
  
  
  PJ_IDEF(int) pj_strcmp( const pj_str_t *str1, const pj_str_t *str2)
  {
      if (str1->slen == 0) {
  	return str2->slen==0 ? 0 : -1;
      } else if (str2->slen == 0) {
  	return 1;
      } else {
  	pj_size_t min = (str1->slen < str2->slen)? str1->slen : str2->slen;
  	int res = pj_memcmp(str1->ptr, str2->ptr, min);
  	if (res == 0) {
  	    return (str1->slen < str2->slen) ? -1 :
  		    (str1->slen == str2->slen ? 0 : 1);
  	} else {
  	    return res;
  	}
      }
  }
  
  PJ_IDEF(int) pj_strncmp( const pj_str_t *str1, const pj_str_t *str2, 
  			 pj_size_t len)
  {
      pj_str_t copy1, copy2;
  
      if (len < (unsigned)str1->slen) {
  	copy1.ptr = str1->ptr;
  	copy1.slen = len;
  	str1 = &copy1;
      }
  
      if (len < (unsigned)str2->slen) {
  	copy2.ptr = str2->ptr;
  	copy2.slen = len;
  	str2 = &copy2;
      }
  
      return pj_strcmp(str1, str2);
  }
  
  PJ_IDEF(int) pj_strncmp2( const pj_str_t *str1, const char *str2, 
  			  pj_size_t len)
  {
      pj_str_t copy2;
  
      if (str2) {
  	copy2.ptr = (char*)str2;
  	copy2.slen = pj_ansi_strlen(str2);
      } else {
  	copy2.slen = 0;
      }
  
      return pj_strncmp(str1, &copy2, len);
  }
  
  PJ_IDEF(int) pj_strcmp2( const pj_str_t *str1, const char *str2 )
  {
      pj_str_t copy2;
  
      if (str2) {
  	copy2.ptr = (char*)str2;
  	copy2.slen = pj_ansi_strlen(str2);
      } else {
  	copy2.ptr = NULL;
  	copy2.slen = 0;
      }
  
      return pj_strcmp(str1, &copy2);
  }
  
  PJ_IDEF(int) pj_stricmp( const pj_str_t *str1, const pj_str_t *str2)
  {
      if (str1->slen == 0) {
  	return str2->slen==0 ? 0 : -1;
      } else if (str2->slen == 0) {
  	return 1;
      } else {
  	pj_size_t min = (str1->slen < str2->slen)? str1->slen : str2->slen;
  	int res = pj_ansi_strnicmp(str1->ptr, str2->ptr, min);
  	if (res == 0) {
  	    return (str1->slen < str2->slen) ? -1 :
  		    (str1->slen == str2->slen ? 0 : 1);
  	} else {
  	    return res;
  	}
      }
  }
  
  #if defined(PJ_HAS_STRICMP_ALNUM) && PJ_HAS_STRICMP_ALNUM!=0
  PJ_IDEF(int) strnicmp_alnum( const char *str1, const char *str2,
  			     int len)
  {
      if (len==0)
  	return 0;
      else {
  	register const pj_uint32_t *p1 = (pj_uint32_t*)str1, 
  		                   *p2 = (pj_uint32_t*)str2;
  	while (len > 3 && (*p1 & 0x5F5F5F5F)==(*p2 & 0x5F5F5F5F))
  	    ++p1, ++p2, len-=4;
  
  	if (len > 3)
  	    return -1;
  #if defined(PJ_IS_LITTLE_ENDIAN) && PJ_IS_LITTLE_ENDIAN!=0
  	else if (len==3)
  	    return ((*p1 & 0x005F5F5F)==(*p2 & 0x005F5F5F)) ? 0 : -1;
  	else if (len==2)
  	    return ((*p1 & 0x00005F5F)==(*p2 & 0x00005F5F)) ? 0 : -1;
  	else if (len==1)
  	    return ((*p1 & 0x0000005F)==(*p2 & 0x0000005F)) ? 0 : -1;
  #else
  	else if (len==3)
  	    return ((*p1 & 0x5F5F5F00)==(*p2 & 0x5F5F5F00)) ? 0 : -1;
  	else if (len==2)
  	    return ((*p1 & 0x5F5F0000)==(*p2 & 0x5F5F0000)) ? 0 : -1;
  	else if (len==1)
  	    return ((*p1 & 0x5F000000)==(*p2 & 0x5F000000)) ? 0 : -1;
  #endif
  	else 
  	    return 0;
      }
  }
  
  PJ_IDEF(int) pj_stricmp_alnum(const pj_str_t *str1, const pj_str_t *str2)
  {
      register int len = str1->slen;
  
      if (len != str2->slen) {
  	return (len < str2->slen) ? -1 : 1;
      } else if (len == 0) {
  	return 0;
      } else {
  	register const pj_uint32_t *p1 = (pj_uint32_t*)str1->ptr, 
  		                   *p2 = (pj_uint32_t*)str2->ptr;
  	while (len > 3 && (*p1 & 0x5F5F5F5F)==(*p2 & 0x5F5F5F5F))
  	    ++p1, ++p2, len-=4;
  
  	if (len > 3)
  	    return -1;
  #if defined(PJ_IS_LITTLE_ENDIAN) && PJ_IS_LITTLE_ENDIAN!=0
  	else if (len==3)
  	    return ((*p1 & 0x005F5F5F)==(*p2 & 0x005F5F5F)) ? 0 : -1;
  	else if (len==2)
  	    return ((*p1 & 0x00005F5F)==(*p2 & 0x00005F5F)) ? 0 : -1;
  	else if (len==1)
  	    return ((*p1 & 0x0000005F)==(*p2 & 0x0000005F)) ? 0 : -1;
  #else
  	else if (len==3)
  	    return ((*p1 & 0x5F5F5F00)==(*p2 & 0x5F5F5F00)) ? 0 : -1;
  	else if (len==2)
  	    return ((*p1 & 0x5F5F0000)==(*p2 & 0x5F5F0000)) ? 0 : -1;
  	else if (len==1)
  	    return ((*p1 & 0x5F000000)==(*p2 & 0x5F000000)) ? 0 : -1;
  #endif
  	else 
  	    return 0;
      }
  }
  #endif	/* PJ_HAS_STRICMP_ALNUM */
  
  PJ_IDEF(int) pj_stricmp2( const pj_str_t *str1, const char *str2)
  {
      pj_str_t copy2;
  
      if (str2) {
  	copy2.ptr = (char*)str2;
  	copy2.slen = pj_ansi_strlen(str2);
      } else {
  	copy2.ptr = NULL;
  	copy2.slen = 0;
      }
  
      return pj_stricmp(str1, &copy2);
  }
  
  PJ_IDEF(int) pj_strnicmp( const pj_str_t *str1, const pj_str_t *str2, 
  			  pj_size_t len)
  {
      pj_str_t copy1, copy2;
  
      if (len < (unsigned)str1->slen) {
  	copy1.ptr = str1->ptr;
  	copy1.slen = len;
  	str1 = &copy1;
      }
  
      if (len < (unsigned)str2->slen) {
  	copy2.ptr = str2->ptr;
  	copy2.slen = len;
  	str2 = &copy2;
      }
  
      return pj_stricmp(str1, str2);
  }
  
  PJ_IDEF(int) pj_strnicmp2( const pj_str_t *str1, const char *str2, 
  			   pj_size_t len)
  {
      pj_str_t copy2;
  
      if (str2) {
  	copy2.ptr = (char*)str2;
  	copy2.slen = pj_ansi_strlen(str2);
      } else {
  	copy2.slen = 0;
      }
  
      return pj_strnicmp(str1, &copy2, len);
  }
  
  PJ_IDEF(void) pj_strcat(pj_str_t *dst, const pj_str_t *src)
  {
      if (src->slen) {
  	pj_memcpy(dst->ptr + dst->slen, src->ptr, src->slen);
  	dst->slen += src->slen;
      }
  }
  
  PJ_IDEF(void) pj_strcat2(pj_str_t *dst, const char *str)
  {
      pj_size_t len = str? pj_ansi_strlen(str) : 0;
      if (len) {
  	pj_memcpy(dst->ptr + dst->slen, str, len);
  	dst->slen += len;
      }
  }
  
  PJ_IDEF(pj_str_t*) pj_strtrim( pj_str_t *str )
  {
      pj_strltrim(str);
      pj_strrtrim(str);
      return str;
  }
  
  