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Annotation of embedaddon/expat/amiga/stdlib.c, revision 1.1

1.1     ! misho       1: /*
        !             2: ** Copyright (c) 2001-2007 Expat maintainers.
        !             3: **
        !             4: ** Permission is hereby granted, free of charge, to any person obtaining
        !             5: ** a copy of this software and associated documentation files (the
        !             6: ** "Software"), to deal in the Software without restriction, including
        !             7: ** without limitation the rights to use, copy, modify, merge, publish,
        !             8: ** distribute, sublicense, and/or sell copies of the Software, and to
        !             9: ** permit persons to whom the Software is furnished to do so, subject to
        !            10: ** the following conditions:
        !            11: ** 
        !            12: ** The above copyright notice and this permission notice shall be included
        !            13: ** in all copies or substantial portions of the Software.
        !            14: ** 
        !            15: ** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
        !            16: ** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
        !            17: ** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
        !            18: ** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
        !            19: ** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
        !            20: ** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
        !            21: ** SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
        !            22: */
        !            23: 
        !            24: #include <stdlib.h>
        !            25: #include <exec/memory.h>
        !            26: #include <proto/exec.h>
        !            27: #include <proto/utility.h>
        !            28: 
        !            29: void * malloc (size_t len)
        !            30: {
        !            31:        uint32 size = sizeof(uint32) + len;
        !            32: 
        !            33:        uint32 *mem = AllocMem(size, MEMF_SHARED);
        !            34:        if ( mem != 0 )  {
        !            35:                *mem = size;
        !            36:                ++mem;
        !            37:        }
        !            38: 
        !            39:        return mem;
        !            40: }
        !            41: 
        !            42: 
        !            43: void * realloc (void * mem, size_t len2)
        !            44: {
        !            45:        if ( mem == 0 )  {
        !            46:                return malloc(len2);
        !            47:        }
        !            48: 
        !            49:        if ( len2 == 0 )  {
        !            50:                free(mem);
        !            51:                return 0;
        !            52:        }
        !            53: 
        !            54:        void * new_mem = malloc(len2);
        !            55:        if ( new_mem == 0 )  {
        !            56:                return 0;
        !            57:        }
        !            58: 
        !            59:        uint32 mem_size = *(((uint32*)mem) - 1);
        !            60:        CopyMem(mem, new_mem, mem_size);
        !            61:        free(mem);
        !            62: 
        !            63:        return new_mem;
        !            64: }
        !            65: 
        !            66: 
        !            67: void free (void * mem)
        !            68: {
        !            69:        if ( mem != 0 )  {
        !            70:                uint32 * size_ptr = ((uint32*)mem) - 1;
        !            71:                FreeMem(size_ptr, *size_ptr);
        !            72:        }
        !            73: }
        !            74: 
        !            75: 
        !            76: int memcmp (const void * a, const void * b, size_t len)
        !            77: {
        !            78:        size_t i;
        !            79:        int diff;
        !            80: 
        !            81:        for ( i = 0; i < len; ++i )  {
        !            82:                diff = *((uint8 *)a++) - *((uint8 *)b++);
        !            83:                if ( diff )  {
        !            84:                        return diff;
        !            85:                }
        !            86:        }
        !            87: 
        !            88:        return 0;
        !            89: }
        !            90: 
        !            91: 
        !            92: void * memcpy (void * t, const void * a, size_t len)
        !            93: {
        !            94:        CopyMem((APTR)a, t, len);
        !            95:        return t;
        !            96: }
        !            97: 
        !            98: 
        !            99: void * memmove (void * t1, const void * t2, size_t len)
        !           100: {
        !           101:        MoveMem((APTR)t2, t1, len);
        !           102:        return t1;
        !           103: }
        !           104: 
        !           105: 
        !           106: void * memset (void * t, int c, size_t len)
        !           107: {
        !           108:        return SetMem(t, c, len);
        !           109: }