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Annotation of embedaddon/php/ext/bcmath/libbcmath/src/init.c, revision 1.1

1.1     ! misho       1: /* init.c: bcmath library file. */
        !             2: /*
        !             3:     Copyright (C) 1991, 1992, 1993, 1994, 1997 Free Software Foundation, Inc.
        !             4:     Copyright (C) 2000 Philip A. Nelson
        !             5: 
        !             6:     This library is free software; you can redistribute it and/or
        !             7:     modify it under the terms of the GNU Lesser General Public
        !             8:     License as published by the Free Software Foundation; either
        !             9:     version 2 of the License, or (at your option) any later version.
        !            10: 
        !            11:     This library is distributed in the hope that it will be useful,
        !            12:     but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            13:     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
        !            14:     Lesser General Public License for more details.  (COPYING.LIB)
        !            15: 
        !            16:     You should have received a copy of the GNU Lesser General Public
        !            17:     License along with this library; if not, write to:
        !            18: 
        !            19:       The Free Software Foundation, Inc.
        !            20:       59 Temple Place, Suite 330
        !            21:       Boston, MA 02111-1307 USA.
        !            22: 
        !            23:     You may contact the author by:
        !            24:        e-mail:  philnelson@acm.org
        !            25:       us-mail:  Philip A. Nelson
        !            26:                 Computer Science Department, 9062
        !            27:                 Western Washington University
        !            28:                 Bellingham, WA 98226-9062
        !            29:        
        !            30: *************************************************************************/
        !            31: 
        !            32: #include <config.h>
        !            33: #include <stdio.h>
        !            34: #include <assert.h>
        !            35: #include <stdlib.h>
        !            36: #include <ctype.h>
        !            37: #include <stdarg.h>
        !            38: #include "bcmath.h"
        !            39: #include "private.h"
        !            40: 
        !            41: #if SANDER_0
        !            42:  bc_num _bc_Free_list = NULL;
        !            43: #endif
        !            44: 
        !            45: /* new_num allocates a number and sets fields to known values. */
        !            46: 
        !            47: bc_num
        !            48: _bc_new_num_ex (length, scale, persistent)
        !            49:      int length, scale, persistent;
        !            50: {
        !            51:   bc_num temp;
        !            52: 
        !            53:   /* PHP Change:  malloc() -> pemalloc(), removed free_list code */
        !            54:   temp = (bc_num) safe_pemalloc (1, sizeof(bc_struct)+length, scale, persistent);
        !            55: #if 0
        !            56:   if (_bc_Free_list != NULL) {
        !            57:     temp = _bc_Free_list;
        !            58:     _bc_Free_list = temp->n_next;
        !            59:   } else {
        !            60:     temp = (bc_num) pemalloc (sizeof(bc_struct), persistent);
        !            61:     if (temp == NULL) bc_out_of_memory ();
        !            62:   }
        !            63: #endif
        !            64:   temp->n_sign = PLUS;
        !            65:   temp->n_len = length;
        !            66:   temp->n_scale = scale;
        !            67:   temp->n_refs = 1;
        !            68:   /* PHP Change:  malloc() -> pemalloc() */
        !            69:   temp->n_ptr = (char *) safe_pemalloc (1, length, scale, persistent);
        !            70:   if (temp->n_ptr == NULL) bc_out_of_memory();
        !            71:   temp->n_value = temp->n_ptr;
        !            72:   memset (temp->n_ptr, 0, length+scale);
        !            73:   return temp;
        !            74: }
        !            75: 
        !            76: 
        !            77: /* "Frees" a bc_num NUM.  Actually decreases reference count and only
        !            78:    frees the storage if reference count is zero. */
        !            79: 
        !            80: void
        !            81: _bc_free_num_ex (num, persistent)
        !            82:     bc_num *num;
        !            83:     int persistent;
        !            84: {
        !            85:   if (*num == NULL) return;
        !            86:   (*num)->n_refs--;
        !            87:   if ((*num)->n_refs == 0) {
        !            88:     if ((*num)->n_ptr)
        !            89:                /* PHP Change:  free() -> pefree(), removed free_list code */
        !            90:       pefree ((*num)->n_ptr, persistent);
        !            91:        pefree(*num, persistent);
        !            92: #if 0
        !            93:     (*num)->n_next = _bc_Free_list;
        !            94:     _bc_Free_list = *num;
        !            95: #endif
        !            96:   }
        !            97:   *num = NULL;
        !            98: }
        !            99: 
        !           100: 
        !           101: /* Intitialize the number package! */
        !           102: 
        !           103: void
        !           104: bc_init_numbers (TSRMLS_D)
        !           105: {
        !           106:   BCG(_zero_) = _bc_new_num_ex (1,0,1);
        !           107:   BCG(_one_)  = _bc_new_num_ex (1,0,1);
        !           108:   BCG(_one_)->n_value[0] = 1;
        !           109:   BCG(_two_)  = _bc_new_num_ex (1,0,1);
        !           110:   BCG(_two_)->n_value[0] = 2;
        !           111: }
        !           112: 
        !           113: 
        !           114: /* Make a copy of a number!  Just increments the reference count! */
        !           115: 
        !           116: bc_num
        !           117: bc_copy_num (bc_num num)
        !           118: {
        !           119:   num->n_refs++;
        !           120:   return num;
        !           121: }
        !           122: 
        !           123: 
        !           124: /* Initialize a number NUM by making it a copy of zero. */
        !           125: 
        !           126: void
        !           127: bc_init_num (bc_num *num TSRMLS_DC)
        !           128: {
        !           129:   *num = bc_copy_num (BCG(_zero_));
        !           130: }
        !           131: