src/stdlib/SDL_string.c
author Sam Lantinga
Fri, 10 Feb 2006 06:48:43 +0000
changeset 1358 c71e05b4dc2e
parent 1354 22f39393668a
child 1379 c0a74f199ecf
permissions -rw-r--r--
More header massaging... works great on Windows. ;-)
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2006 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Lesser General Public
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    License as published by the Free Software Foundation; either
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    version 2.1 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Lesser General Public License for more details.
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    You should have received a copy of the GNU Lesser General Public
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    License along with this library; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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/* This file contains portable string manipulation functions for SDL */
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#include "SDL_stdinc.h"
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#define SDL_isupperhex(X)   (((X) >= 'A') && ((X) <= 'F'))
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#define SDL_islowerhex(X)   (((X) >= 'a') && ((X) <= 'f'))
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#if !defined(HAVE_SSCANF) || !defined(HAVE_STRTOL)
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static size_t SDL_ScanLong(const char *text, int radix, long *valuep)
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{
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    const char *textstart = text;
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    long value = 0;
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    SDL_bool negative = SDL_FALSE;
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    if ( *text == '-' ) {
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        negative = SDL_TRUE;
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        ++text;
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    }
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    if ( radix == 16 && SDL_strncmp(text, "0x", 2) == 0 ) {
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        text += 2;
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    }
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    for ( ; ; ) {
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        int v;
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        if ( SDL_isdigit(*text) ) {
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            v = *text - '0';
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        } else if ( radix == 16 && SDL_isupperhex(*text) ) {
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            v = 10 + (*text - 'A');
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        } else if ( radix == 16 && SDL_islowerhex(*text) ) {
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            v = 10 + (*text - 'a');
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        } else {
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            break;
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        }
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        value *= radix;
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        value += v;
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        ++text;
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    }
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    if ( valuep ) {
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        if ( negative && value ) {
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            *valuep = -value;
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        } else {
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            *valuep = value;
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        }
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    }
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    return (text - textstart);
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}
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#endif
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#if !defined(HAVE_SSCANF) || !defined(HAVE_STRTOD)
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static size_t SDL_ScanUnsignedLong(const char *text, int radix, unsigned long *valuep)
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{
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    const char *textstart = text;
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    unsigned long value = 0;
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    if ( radix == 16 && SDL_strncmp(text, "0x", 2) == 0 ) {
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        text += 2;
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    }
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    for ( ; ; ) {
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        int v;
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        if ( SDL_isdigit(*text) ) {
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            v = *text - '0';
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        } else if ( radix == 16 && SDL_isupperhex(*text) ) {
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            v = 10 + (*text - 'A');
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        } else if ( radix == 16 && SDL_islowerhex(*text) ) {
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            v = 10 + (*text - 'a');
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        } else {
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            break;
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        }
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        value *= radix;
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        value += v;
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        ++text;
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    }
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    if ( valuep ) {
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        *valuep = value;
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    }
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    return (text - textstart);
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}
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#endif
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#ifdef SDL_HAS_64BIT_TYPE
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#if !defined(HAVE_SSCANF) || !defined(HAVE_STRTOLL)
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static size_t SDL_ScanLongLong(const char *text, int radix, Sint64 *valuep)
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{
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    const char *textstart = text;
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    Sint64 value = 0;
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    SDL_bool negative = SDL_FALSE;
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    if ( *text == '-' ) {
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        negative = SDL_TRUE;
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        ++text;
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    }
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    if ( radix == 16 && SDL_strncmp(text, "0x", 2) == 0 ) {
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        text += 2;
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    }
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    for ( ; ; ) {
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        int v;
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        if ( SDL_isdigit(*text) ) {
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            v = *text - '0';
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        } else if ( radix == 16 && SDL_isupperhex(*text) ) {
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            v = 10 + (*text - 'A');
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        } else if ( radix == 16 && SDL_islowerhex(*text) ) {
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            v = 10 + (*text - 'a');
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        } else {
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            break;
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        }
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        value *= radix;
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        value += v;
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        ++text;
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    }
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    if ( valuep ) {
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        if ( negative && value ) {
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            *valuep = -value;
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        } else {
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            *valuep = value;
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        }
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    }
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    return (text - textstart);
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}
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#endif
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#ifndef HAVE_SSCANF
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static size_t SDL_ScanUnsignedLongLong(const char *text, int radix, Uint64 *valuep)
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{
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    const char *textstart = text;
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    Uint64 value = 0;
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    if ( radix == 16 && SDL_strncmp(text, "0x", 2) == 0 ) {
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        text += 2;
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    }
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    for ( ; ; ) {
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        int v;
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        if ( SDL_isdigit(*text) ) {
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            v = *text - '0';
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        } else if ( radix == 16 && SDL_isupperhex(*text) ) {
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            v = 10 + (*text - 'A');
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        } else if ( radix == 16 && SDL_islowerhex(*text) ) {
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            v = 10 + (*text - 'a');
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        } else {
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            break;
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        }
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        value *= radix;
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        value += v;
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        ++text;
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    }
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    if ( valuep ) {
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        *valuep = value;
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    }
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    return (text - textstart);
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}
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#endif
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#endif /* SDL_HAS_64BIT_TYPE */
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#if !defined(HAVE_SSCANF) || !defined(HAVE_STRTOD)
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static size_t SDL_ScanFloat(const char *text, double *valuep)
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{
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    const char *textstart = text;
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    unsigned long lvalue = 0;
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    double value = 0.0;
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    SDL_bool negative = SDL_FALSE;
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    if ( *text == '-' ) {
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        negative = SDL_TRUE;
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        ++text;
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    }
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    text += SDL_ScanUnsignedLong(text, 10, &lvalue);
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    value += lvalue;
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    if ( *text == '.' ) {
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        int mult = 10;
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        ++text;
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        while ( SDL_isdigit(*text) ) {
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            lvalue = *text - '0';
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            value += (double)lvalue / mult;
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            mult *= 10;
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            ++text;
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        }
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    }
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    if ( valuep ) {
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        if ( negative && value ) {
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            *valuep = -value;
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        } else {
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            *valuep = value;
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        }
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    }
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    return (text - textstart);
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}
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#endif
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#ifndef SDL_memset
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void *SDL_memset(void *dst, int c, size_t len)
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{
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    size_t left = (len % 4);
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    if ( len >= 4 ) {
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        Uint32 value = 0;
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        Uint32 *dstp = (Uint32 *)dst;
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        int i;
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        for (i = 0; i < 4; ++i) {
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            value <<= 8;
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            value |= c;
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        }
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        len /= 4;
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        while ( len-- ) {
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            *dstp++ = value;
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        }
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    }
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    if ( left > 0 ) {
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        Uint8 value = (Uint8)c;
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        Uint8 *dstp = (Uint8 *)dst;
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	switch(left) {
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	case 3:
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            *dstp++ = value;
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	case 2:
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            *dstp++ = value;
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	case 1:
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            *dstp++ = value;
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        }
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    }
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    return dst;
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}
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#endif
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#ifndef SDL_memcpy
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void *SDL_memcpy(void *dst, const void *src, size_t len)
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{
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    char *srcp = (char *)src;
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    char *dstp = (char *)dst;
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    while ( len-- ) {
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        *dstp++ = *srcp++;
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    }
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    return dst;
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}
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#endif
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#ifndef SDL_revcpy
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void *SDL_revcpy(void *dst, const void *src, size_t len)
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{
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    char *srcp = (char *)src;
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    char *dstp = (char *)dst;
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    srcp += len;
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    dstp += len;
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    while ( len-- ) {
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        *dstp-- = *srcp--;
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    }
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    return dst;
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}
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#endif
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#ifndef SDL_memcmp
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int SDL_memcmp(const void *s1, const void *s2, size_t len)
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{
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    char *s1p = (char *)s1;
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    char *s2p = (char *)s2;
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    while ( len-- ) {
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        if ( *s1p != *s2p ) {
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            return (*s1p - *s2p);
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    }
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    ++s1p;
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    ++s2p;
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    }
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    return 0;
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}
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#endif
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#ifndef HAVE_STRLEN
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size_t SDL_strlen(const char *string)
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{
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    size_t len = 0;
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    while ( *string++ ) {
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        ++len;
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    }
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    return len;
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}
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#endif
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#ifndef HAVE_STRCPY
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char *SDL_strcpy(char *dst, const char *src)
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{
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    char *dstp = dst;
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    while ( *src ) {
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        *dstp++ = *src++;
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    }
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    *dstp = '\0';
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    return dst;
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}
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#endif
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#ifndef HAVE_STRNCPY
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char *SDL_strncpy(char *dst, const char *src, size_t maxlen)
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{
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    char *dstp = dst;
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    while ( maxlen-- && *src ) {
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        *dstp++ = *src++;
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    }
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    *dstp = '\0';
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    return dst;
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}
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#endif
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#ifndef HAVE_STRDUP
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char *SDL_strdup(const char *string)
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{
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    size_t len = SDL_strlen(string);
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    char *newstr = SDL_malloc(len+1);
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    if ( newstr ) {
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        SDL_strcpy(newstr, string);
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    }
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    return newstr;
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}
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#endif
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#ifndef HAVE__STRREV
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char *SDL_strrev(char *string)
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{
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    size_t len = SDL_strlen(string);
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    char *a = &string[0];
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    char *b = &string[len-1];
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    len /= 2;
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    while ( len-- ) {
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        char c = *a;
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        *a++ = *b;
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        *b-- = c;
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    }
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    return string;
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}
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#endif
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#ifndef HAVE__STRUPR
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char *SDL_strupr(char *string)
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{
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    char *bufp = string;
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    while ( *bufp ) {
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        *bufp = SDL_toupper(*bufp);
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	++bufp;
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    }
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    return string;
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}
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#endif
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#ifndef HAVE__STRLWR
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char *SDL_strlwr(char *string)
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{
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    char *bufp = string;
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    while ( *bufp ) {
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        *bufp = SDL_tolower(*bufp);
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	++bufp;
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    }
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    return string;
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}
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#endif
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#ifndef HAVE_STRCHR
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char *SDL_strchr(const char *string, int c)
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{
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    while ( *string ) {
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        if ( *string == c ) {
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            return (char *)string;
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        }
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	++string;
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    }
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    return NULL;
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}
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#endif
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#ifndef HAVE_STRRCHR
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char *SDL_strrchr(const char *string, int c)
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{
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    const char *bufp = string + SDL_strlen(string) - 1;
slouken@1330
   392
    while ( bufp >= string ) {
slouken@1330
   393
        if ( *bufp == c ) {
slouken@1330
   394
            return (char *)bufp;
slouken@1330
   395
        }
slouken@1338
   396
	--bufp;
slouken@1330
   397
    }
slouken@1330
   398
    return NULL;
slouken@1330
   399
}
slouken@1330
   400
#endif
slouken@1330
   401
slouken@1330
   402
#ifndef HAVE_STRSTR
slouken@1330
   403
char *SDL_strstr(const char *haystack, const char *needle)
slouken@1330
   404
{
slouken@1336
   405
    size_t length = SDL_strlen(needle);
slouken@1330
   406
    while ( *haystack ) {
slouken@1336
   407
        if ( SDL_strncmp(haystack, needle, length) == 0 ) {
slouken@1330
   408
            return (char *)haystack;
slouken@1330
   409
        }
slouken@1338
   410
	++haystack;
slouken@1330
   411
    }
slouken@1330
   412
    return NULL;
slouken@1330
   413
}
slouken@1330
   414
#endif
slouken@1330
   415
slouken@1330
   416
#if !defined(HAVE__LTOA)  || !defined(HAVE__I64TOA) || \
slouken@1330
   417
    !defined(HAVE__ULTOA) || !defined(HAVE__UI64TOA)
slouken@1330
   418
static const char ntoa_table[] = {
slouken@1330
   419
    '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
slouken@1330
   420
    'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J',
slouken@1330
   421
    'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
slouken@1330
   422
    'U', 'V', 'W', 'X', 'Y', 'Z'
slouken@1330
   423
};
slouken@1330
   424
#endif /* ntoa() conversion table */
slouken@1330
   425
slouken@1330
   426
#ifndef HAVE__LTOA
slouken@1330
   427
char *SDL_ltoa(long value, char *string, int radix)
slouken@1330
   428
{
slouken@1330
   429
    char *bufp = string;
slouken@1330
   430
slouken@1330
   431
    if ( value < 0 ) {
slouken@1330
   432
        *bufp++ = '-';
slouken@1330
   433
        value = -value;
slouken@1330
   434
    }
slouken@1330
   435
    if ( value ) {
slouken@1330
   436
        while ( value > 0 ) {
slouken@1330
   437
            *bufp++ = ntoa_table[value % radix];
slouken@1330
   438
            value /= radix;
slouken@1330
   439
        }
slouken@1330
   440
    } else {
slouken@1330
   441
        *bufp++ = '0';
slouken@1330
   442
    }
slouken@1330
   443
    *bufp = '\0';
slouken@1330
   444
slouken@1330
   445
    /* The numbers went into the string backwards. :) */
slouken@1330
   446
    if ( *string == '-' ) {
slouken@1336
   447
        SDL_strrev(string+1);
slouken@1330
   448
    } else {
slouken@1336
   449
        SDL_strrev(string);
slouken@1330
   450
    }
slouken@1330
   451
slouken@1330
   452
    return string;
slouken@1330
   453
}
slouken@1330
   454
#endif
slouken@1330
   455
slouken@1330
   456
#ifndef HAVE__ULTOA
slouken@1330
   457
char *SDL_ultoa(unsigned long value, char *string, int radix)
slouken@1330
   458
{
slouken@1330
   459
    char *bufp = string;
slouken@1330
   460
slouken@1330
   461
    if ( value ) {
slouken@1330
   462
        while ( value > 0 ) {
slouken@1330
   463
            *bufp++ = ntoa_table[value % radix];
slouken@1330
   464
            value /= radix;
slouken@1330
   465
        }
slouken@1330
   466
    } else {
slouken@1330
   467
        *bufp++ = '0';
slouken@1330
   468
    }
slouken@1330
   469
    *bufp = '\0';
slouken@1330
   470
slouken@1330
   471
    /* The numbers went into the string backwards. :) */
slouken@1336
   472
    SDL_strrev(string);
slouken@1330
   473
slouken@1330
   474
    return string;
slouken@1330
   475
}
slouken@1330
   476
#endif
slouken@1330
   477
slouken@1330
   478
#ifndef HAVE_STRTOL
slouken@1330
   479
long SDL_strtol(const char *string, char **endp, int base)
slouken@1330
   480
{
slouken@1330
   481
    size_t len;
slouken@1330
   482
    long value;
slouken@1330
   483
slouken@1330
   484
    len = SDL_ScanLong(string, base ? base : 10, &value);
slouken@1330
   485
    if ( endp ) {
slouken@1330
   486
        *endp = (char *)string + len;
slouken@1330
   487
    }
slouken@1330
   488
    return value;
slouken@1330
   489
}
slouken@1330
   490
#endif
slouken@1330
   491
slouken@1330
   492
#ifdef SDL_HAS_64BIT_TYPE
slouken@1330
   493
slouken@1330
   494
#ifndef HAVE__I64TOA
slouken@1330
   495
char *SDL_lltoa(Sint64 value, char *string, int radix)
slouken@1330
   496
{
slouken@1330
   497
    char *bufp = string;
slouken@1330
   498
slouken@1330
   499
    if ( value < 0 ) {
slouken@1330
   500
        *bufp++ = '-';
slouken@1330
   501
        value = -value;
slouken@1330
   502
    }
slouken@1330
   503
    if ( value ) {
slouken@1330
   504
        while ( value > 0 ) {
slouken@1330
   505
            *bufp++ = ntoa_table[value % radix];
slouken@1330
   506
            value /= radix;
slouken@1330
   507
        }
slouken@1330
   508
    } else {
slouken@1330
   509
        *bufp++ = '0';
slouken@1330
   510
    }
slouken@1330
   511
    *bufp = '\0';
slouken@1330
   512
slouken@1330
   513
    /* The numbers went into the string backwards. :) */
slouken@1330
   514
    if ( *string == '-' ) {
slouken@1336
   515
        SDL_strrev(string+1);
slouken@1330
   516
    } else {
slouken@1336
   517
        SDL_strrev(string);
slouken@1330
   518
    }
slouken@1330
   519
slouken@1330
   520
    return string;
slouken@1330
   521
}
slouken@1330
   522
#endif
slouken@1330
   523
slouken@1330
   524
#ifndef HAVE__UI64TOA
slouken@1330
   525
char *SDL_ulltoa(Uint64 value, char *string, int radix)
slouken@1330
   526
{
slouken@1330
   527
    char *bufp = string;
slouken@1330
   528
slouken@1330
   529
    if ( value ) {
slouken@1330
   530
        while ( value > 0 ) {
slouken@1330
   531
            *bufp++ = ntoa_table[value % radix];
slouken@1330
   532
            value /= radix;
slouken@1330
   533
        }
slouken@1330
   534
    } else {
slouken@1330
   535
        *bufp++ = '0';
slouken@1330
   536
    }
slouken@1330
   537
    *bufp = '\0';
slouken@1330
   538
slouken@1330
   539
    /* The numbers went into the string backwards. :) */
slouken@1336
   540
    SDL_strrev(string);
slouken@1330
   541
slouken@1330
   542
    return string;
slouken@1330
   543
}
slouken@1330
   544
#endif
slouken@1330
   545
slouken@1330
   546
#ifndef HAVE_STRTOLL
slouken@1330
   547
Sint64 SDL_strtoll(const char *string, char **endp, int base)
slouken@1330
   548
{
slouken@1330
   549
    size_t len;
slouken@1330
   550
    Sint64 value;
slouken@1330
   551
slouken@1330
   552
    len = SDL_ScanLongLong(string, base ? base : 10, &value);
slouken@1330
   553
    if ( endp ) {
slouken@1330
   554
        *endp = (char *)string + len;
slouken@1330
   555
    }
slouken@1330
   556
    return value;
slouken@1330
   557
}
slouken@1330
   558
#endif
slouken@1330
   559
slouken@1330
   560
#endif /* SDL_HAS_64BIT_TYPE */
slouken@1330
   561
slouken@1341
   562
#ifndef HAVE_STRTOD
slouken@1341
   563
double SDL_strtod(const char *string, char **endp)
slouken@1341
   564
{
slouken@1341
   565
    size_t len;
slouken@1341
   566
    double value;
slouken@1341
   567
slouken@1341
   568
    len = SDL_ScanFloat(string, &value);
slouken@1341
   569
    if ( endp ) {
slouken@1341
   570
        *endp = (char *)string + len;
slouken@1341
   571
    }
slouken@1341
   572
    return value;
slouken@1341
   573
}
slouken@1341
   574
#endif
slouken@1341
   575
slouken@1330
   576
#ifndef HAVE_STRCMP
slouken@1330
   577
int SDL_strcmp(const char *str1, const char *str2)
slouken@1330
   578
{
slouken@1330
   579
    while (*str1 && *str2) {
slouken@1330
   580
        if ( *str1 != *str2 )
slouken@1330
   581
            break;
slouken@1330
   582
        ++str1;
slouken@1330
   583
        ++str2;
slouken@1330
   584
    }
slouken@1330
   585
    return (int)((unsigned char)*str1 - (unsigned char)*str2);
slouken@1330
   586
}
slouken@1330
   587
#endif
slouken@1330
   588
slouken@1330
   589
#ifndef HAVE_STRNCMP
slouken@1330
   590
int SDL_strncmp(const char *str1, const char *str2, size_t maxlen)
slouken@1330
   591
{
slouken@1330
   592
    while ( *str1 && *str2 && maxlen ) {
slouken@1330
   593
        if ( *str1 != *str2 )
slouken@1330
   594
            break;
slouken@1330
   595
        ++str1;
slouken@1330
   596
        ++str2;
slouken@1330
   597
        --maxlen;
slouken@1330
   598
    }
slouken@1330
   599
    if ( ! maxlen ) {
slouken@1330
   600
        return 0;
slouken@1330
   601
    }
slouken@1330
   602
    return (int)((unsigned char)*str1 - (unsigned char)*str2);
slouken@1330
   603
}
slouken@1330
   604
#endif
slouken@1330
   605
slouken@1330
   606
#ifndef HAVE_STRCASECMP
slouken@1330
   607
int SDL_strcasecmp(const char *str1, const char *str2)
slouken@1330
   608
{
slouken@1330
   609
    char a = 0;
slouken@1330
   610
    char b = 0;
slouken@1330
   611
    while (*str1 && *str2) {
slouken@1358
   612
        a = SDL_tolower(*str1);
slouken@1358
   613
        b = SDL_tolower(*str2);
slouken@1330
   614
        if ( a != b )
slouken@1330
   615
            break;
slouken@1330
   616
        ++str1;
slouken@1330
   617
        ++str2;
slouken@1330
   618
    }
slouken@1330
   619
    return (int)((unsigned char)a - (unsigned char)b);
slouken@1330
   620
}
slouken@1330
   621
#endif
slouken@1330
   622
slouken@1330
   623
#ifndef HAVE_SSCANF
slouken@1330
   624
int SDL_sscanf(const char *text, const char *fmt, ...)
slouken@1330
   625
{
slouken@1330
   626
    va_list ap;
slouken@1330
   627
    int retval = 0;
slouken@1330
   628
slouken@1330
   629
    va_start(ap, fmt);
slouken@1330
   630
    while ( *fmt ) {
slouken@1330
   631
        if ( *fmt == ' ' ) {
slouken@1354
   632
            while ( SDL_isspace(*text) ) {
slouken@1330
   633
                ++text;
slouken@1330
   634
            }
slouken@1330
   635
            ++fmt;
slouken@1330
   636
            continue;
slouken@1330
   637
        }
slouken@1330
   638
        if ( *fmt == '%' ) {
slouken@1330
   639
            SDL_bool done = SDL_FALSE;
slouken@1330
   640
            long count = 0;
slouken@1330
   641
            int radix = 10;
slouken@1330
   642
            enum {
slouken@1330
   643
                DO_SHORT,
slouken@1330
   644
                DO_INT,
slouken@1330
   645
                DO_LONG,
slouken@1330
   646
                DO_LONGLONG
slouken@1330
   647
            } inttype = DO_INT;
slouken@1330
   648
            SDL_bool suppress = SDL_FALSE;
slouken@1330
   649
slouken@1330
   650
            ++fmt;
slouken@1330
   651
            if ( *fmt == '%' ) {
slouken@1330
   652
                if ( *text == '%' ) {
slouken@1330
   653
                    ++text;
slouken@1330
   654
                    ++fmt;
slouken@1330
   655
                    continue;
slouken@1330
   656
                }
slouken@1330
   657
                break;
slouken@1330
   658
            }
slouken@1330
   659
            if ( *fmt == '*' ) {
slouken@1330
   660
                suppress = SDL_TRUE;
slouken@1330
   661
                ++fmt;
slouken@1330
   662
            }
slouken@1330
   663
            fmt += SDL_ScanLong(fmt, 10, &count);
slouken@1330
   664
slouken@1330
   665
            if ( *fmt == 'c' ) {
slouken@1330
   666
                if ( ! count ) {
slouken@1330
   667
                    count = 1;
slouken@1330
   668
                }
slouken@1330
   669
                if ( suppress ) {
slouken@1330
   670
                    while ( count-- ) {
slouken@1330
   671
                        ++text;
slouken@1330
   672
                    }
slouken@1330
   673
                } else {
slouken@1330
   674
                    char *valuep = va_arg(ap, char*);
slouken@1330
   675
                    while ( count-- ) {
slouken@1330
   676
                        *valuep++ = *text++;
slouken@1330
   677
                    }
slouken@1330
   678
                    ++retval;
slouken@1330
   679
                }
slouken@1330
   680
                continue;
slouken@1330
   681
            }
slouken@1330
   682
slouken@1354
   683
            while ( SDL_isspace(*text) ) {
slouken@1330
   684
                ++text;
slouken@1330
   685
            }
slouken@1330
   686
slouken@1330
   687
            /* FIXME: implement more of the format specifiers */
slouken@1330
   688
            while (!done) {
slouken@1330
   689
                switch(*fmt) {
slouken@1330
   690
                    case '*':
slouken@1330
   691
                        suppress = SDL_TRUE;
slouken@1330
   692
                        break;
slouken@1330
   693
                    case 'h':
slouken@1330
   694
                        if ( inttype > DO_SHORT ) {
slouken@1330
   695
                            ++inttype;
slouken@1330
   696
                        }
slouken@1330
   697
                        break;
slouken@1330
   698
                    case 'l':
slouken@1330
   699
                        if ( inttype < DO_LONGLONG ) {
slouken@1330
   700
                            ++inttype;
slouken@1330
   701
                        }
slouken@1330
   702
                        break;
slouken@1330
   703
                    case 'I':
slouken@1330
   704
                        if ( SDL_strncmp(fmt, "I64", 3) == 0 ) {
slouken@1330
   705
                            fmt += 2;
slouken@1330
   706
                            inttype = DO_LONGLONG;
slouken@1330
   707
                        }
slouken@1330
   708
                        break;
slouken@1330
   709
                    case 'i':
slouken@1330
   710
                        {
slouken@1330
   711
                            int index = 0;
slouken@1330
   712
                            if ( text[index] == '-' ) {
slouken@1330
   713
                                ++index;
slouken@1330
   714
                            }
slouken@1330
   715
                            if ( text[index] == '0' ) {
slouken@1358
   716
                                if ( SDL_tolower(text[index+1]) == 'x' ) {
slouken@1330
   717
                                    radix = 16;
slouken@1330
   718
                                } else {
slouken@1330
   719
                                    radix = 8;
slouken@1330
   720
                                }
slouken@1330
   721
                            }
slouken@1330
   722
                        }
slouken@1330
   723
                        /* Fall through to %d handling */
slouken@1330
   724
                    case 'd':
slouken@1330
   725
#ifdef SDL_HAS_64BIT_TYPE
slouken@1330
   726
                        if ( inttype == DO_LONGLONG ) {
slouken@1330
   727
                            Sint64 value;
slouken@1330
   728
                            text += SDL_ScanLongLong(text, radix, &value);
slouken@1330
   729
                            if ( ! suppress ) {
slouken@1330
   730
                                Sint64 *valuep = va_arg(ap, Sint64*);
slouken@1330
   731
                                *valuep = value;
slouken@1330
   732
                                ++retval;
slouken@1330
   733
                            }
slouken@1330
   734
                        }
slouken@1330
   735
                        else
slouken@1330
   736
#endif /* SDL_HAS_64BIT_TYPE */
slouken@1330
   737
                        {
slouken@1330
   738
                            long value;
slouken@1330
   739
                            text += SDL_ScanLong(text, radix, &value);
slouken@1330
   740
                            if ( ! suppress ) {
slouken@1330
   741
                                switch (inttype) {
slouken@1330
   742
                                    case DO_SHORT:
slouken@1330
   743
                                        { short* valuep = va_arg(ap, short*);
slouken@1330
   744
                                            *valuep = (short)value;
slouken@1330
   745
                                        }
slouken@1330
   746
                                        break;
slouken@1330
   747
                                    case DO_INT:
slouken@1330
   748
                                        { int* valuep = va_arg(ap, int*);
slouken@1330
   749
                                            *valuep = (int)value;
slouken@1330
   750
                                        }
slouken@1330
   751
                                        break;
slouken@1330
   752
                                    case DO_LONG:
slouken@1330
   753
                                        { long* valuep = va_arg(ap, long*);
slouken@1330
   754
                                            *valuep = value;
slouken@1330
   755
                                        }
slouken@1330
   756
                                        break;
slouken@1330
   757
                                    case DO_LONGLONG:
slouken@1330
   758
                                        /* Handled above */
slouken@1330
   759
                                        break;
slouken@1330
   760
                                }
slouken@1330
   761
                                ++retval;
slouken@1330
   762
                            }
slouken@1330
   763
                        }
slouken@1330
   764
                        done = SDL_TRUE;
slouken@1330
   765
                        break;
slouken@1330
   766
                    case 'o':
slouken@1330
   767
                        if ( radix == 10 ) {
slouken@1330
   768
                            radix = 8;
slouken@1330
   769
                        }
slouken@1330
   770
                        /* Fall through to unsigned handling */
slouken@1330
   771
                    case 'x':
slouken@1330
   772
                    case 'X':
slouken@1330
   773
                        if ( radix == 10 ) {
slouken@1330
   774
                            radix = 16;
slouken@1330
   775
                        }
slouken@1330
   776
                        /* Fall through to unsigned handling */
slouken@1330
   777
                    case 'u':
slouken@1330
   778
#ifdef SDL_HAS_64BIT_TYPE
slouken@1330
   779
                        if ( inttype == DO_LONGLONG ) {
slouken@1330
   780
                            Uint64 value;
slouken@1330
   781
                            text += SDL_ScanUnsignedLongLong(text, radix, &value);
slouken@1330
   782
                            if ( ! suppress ) {
slouken@1330
   783
                                Uint64 *valuep = va_arg(ap, Uint64*);
slouken@1330
   784
                                *valuep = value;
slouken@1330
   785
                                ++retval;
slouken@1330
   786
                            }
slouken@1330
   787
                        }
slouken@1330
   788
                        else
slouken@1330
   789
#endif /* SDL_HAS_64BIT_TYPE */
slouken@1330
   790
                        {
slouken@1330
   791
                            unsigned long value;
slouken@1330
   792
                            text += SDL_ScanUnsignedLong(text, radix, &value);
slouken@1330
   793
                            if ( ! suppress ) {
slouken@1330
   794
                                switch (inttype) {
slouken@1330
   795
                                    case DO_SHORT:
slouken@1330
   796
                                        { short* valuep = va_arg(ap, short*);
slouken@1330
   797
                                            *valuep = (short)value;
slouken@1330
   798
                                        }
slouken@1330
   799
                                        break;
slouken@1330
   800
                                    case DO_INT:
slouken@1330
   801
                                        { int* valuep = va_arg(ap, int*);
slouken@1330
   802
                                            *valuep = (int)value;
slouken@1330
   803
                                        }
slouken@1330
   804
                                        break;
slouken@1330
   805
                                    case DO_LONG:
slouken@1330
   806
                                        { long* valuep = va_arg(ap, long*);
slouken@1330
   807
                                            *valuep = value;
slouken@1330
   808
                                        }
slouken@1330
   809
                                        break;
slouken@1330
   810
                                    case DO_LONGLONG:
slouken@1330
   811
                                        /* Handled above */
slouken@1330
   812
                                        break;
slouken@1330
   813
                                }
slouken@1330
   814
                                ++retval;
slouken@1330
   815
                            }
slouken@1330
   816
                        }
slouken@1330
   817
                        done = SDL_TRUE;
slouken@1330
   818
                        break;
slouken@1330
   819
                    case 'p':
slouken@1330
   820
                        {
slouken@1330
   821
                            unsigned long value;
slouken@1330
   822
                            text += SDL_ScanUnsignedLong(text, 16, &value);
slouken@1330
   823
                            if ( ! suppress ) {
slouken@1330
   824
                                void** valuep = va_arg(ap, void**);
slouken@1330
   825
                                *valuep = (void*)value;
slouken@1330
   826
                                ++retval;
slouken@1330
   827
                            }
slouken@1330
   828
                        }
slouken@1330
   829
                        done = SDL_TRUE;
slouken@1330
   830
                        break;
slouken@1330
   831
                    case 'f':
slouken@1330
   832
                        {
slouken@1330
   833
                            double value;
slouken@1330
   834
                            text += SDL_ScanFloat(text, &value);
slouken@1330
   835
                            if ( ! suppress ) {
slouken@1330
   836
                                float* valuep = va_arg(ap, float*);
slouken@1330
   837
                                *valuep = (float)value;
slouken@1330
   838
                                ++retval;
slouken@1330
   839
                            }
slouken@1330
   840
                        }
slouken@1330
   841
                        done = SDL_TRUE;
slouken@1330
   842
                        break;
slouken@1330
   843
                    case 's':
slouken@1330
   844
                        if ( suppress ) {
slouken@1354
   845
                            while ( !SDL_isspace(*text) ) {
slouken@1330
   846
                                ++text;
slouken@1330
   847
                                if ( count ) {
slouken@1330
   848
                                    if ( --count == 0 ) {
slouken@1330
   849
                                        break;
slouken@1330
   850
                                    }
slouken@1330
   851
                                }
slouken@1330
   852
                            }
slouken@1330
   853
                        } else {
slouken@1330
   854
                            char *valuep = va_arg(ap, char*);
slouken@1354
   855
                            while ( !SDL_isspace(*text) ) {
slouken@1330
   856
                                *valuep++ = *text++;
slouken@1330
   857
                                if ( count ) {
slouken@1330
   858
                                    if ( --count == 0 ) {
slouken@1330
   859
                                        break;
slouken@1330
   860
                                    }
slouken@1330
   861
                                }
slouken@1330
   862
                            }
slouken@1330
   863
                            *valuep = '\0';
slouken@1330
   864
                            ++retval;
slouken@1330
   865
                        }
slouken@1330
   866
                        done = SDL_TRUE;
slouken@1330
   867
                        break;
slouken@1330
   868
                    default:
slouken@1330
   869
                        done = SDL_TRUE;
slouken@1330
   870
                        break;
slouken@1330
   871
                }
slouken@1330
   872
                ++fmt;
slouken@1330
   873
            }
slouken@1330
   874
            continue;
slouken@1330
   875
        }
slouken@1330
   876
        if ( *text == *fmt ) {
slouken@1330
   877
            ++text;
slouken@1330
   878
            ++fmt;
slouken@1330
   879
            continue;
slouken@1330
   880
        }
slouken@1330
   881
        /* Text didn't match format specifier */
slouken@1330
   882
        break;
slouken@1330
   883
    }
slouken@1330
   884
    va_end(ap);
slouken@1330
   885
slouken@1330
   886
    return retval;
slouken@1330
   887
}
slouken@1330
   888
#endif
slouken@1330
   889
slouken@1330
   890
#ifndef HAVE_SNPRINTF
slouken@1330
   891
int SDL_snprintf(char *text, size_t maxlen, const char *fmt, ...)
slouken@1330
   892
{
slouken@1330
   893
    va_list ap;
slouken@1330
   894
    int retval;
slouken@1330
   895
slouken@1330
   896
    va_start(ap, fmt);
slouken@1330
   897
    retval = SDL_vsnprintf(text, maxlen, fmt, ap);
slouken@1330
   898
    va_end(ap);
slouken@1330
   899
slouken@1330
   900
    return retval;
slouken@1330
   901
}
slouken@1330
   902
#endif
slouken@1330
   903
slouken@1330
   904
#ifndef HAVE_VSNPRINTF
slouken@1330
   905
static size_t SDL_PrintLong(char *text, long value, int radix, size_t maxlen)
slouken@1330
   906
{
slouken@1330
   907
    char num[130];
slouken@1330
   908
    size_t size;
slouken@1330
   909
slouken@1336
   910
    SDL_ltoa(value, num, radix);
slouken@1330
   911
    size = SDL_strlen(num);
slouken@1330
   912
    if ( size > maxlen ) {
slouken@1330
   913
        size = maxlen;
slouken@1330
   914
    }
slouken@1336
   915
    SDL_strncpy(text, num, size);
slouken@1330
   916
slouken@1330
   917
    return size;
slouken@1330
   918
}
slouken@1330
   919
static size_t SDL_PrintUnsignedLong(char *text, unsigned long value, int radix, size_t maxlen)
slouken@1330
   920
{
slouken@1330
   921
    char num[130];
slouken@1330
   922
    size_t size;
slouken@1330
   923
slouken@1336
   924
    SDL_ultoa(value, num, radix);
slouken@1330
   925
    size = SDL_strlen(num);
slouken@1330
   926
    if ( size > maxlen ) {
slouken@1330
   927
        size = maxlen;
slouken@1330
   928
    }
slouken@1336
   929
    SDL_strncpy(text, num, size);
slouken@1330
   930
slouken@1330
   931
    return size;
slouken@1330
   932
}
slouken@1330
   933
#ifdef SDL_HAS_64BIT_TYPE
slouken@1330
   934
static size_t SDL_PrintLongLong(char *text, Sint64 value, int radix, size_t maxlen)
slouken@1330
   935
{
slouken@1330
   936
    char num[130];
slouken@1330
   937
    size_t size;
slouken@1330
   938
slouken@1336
   939
    SDL_lltoa(value, num, radix);
slouken@1330
   940
    size = SDL_strlen(num);
slouken@1330
   941
    if ( size > maxlen ) {
slouken@1330
   942
        size = maxlen;
slouken@1330
   943
    }
slouken@1336
   944
    SDL_strncpy(text, num, size);
slouken@1330
   945
slouken@1330
   946
    return size;
slouken@1330
   947
}
slouken@1330
   948
static size_t SDL_PrintUnsignedLongLong(char *text, Uint64 value, int radix, size_t maxlen)
slouken@1330
   949
{
slouken@1330
   950
    char num[130];
slouken@1330
   951
    size_t size;
slouken@1330
   952
slouken@1336
   953
    SDL_ulltoa(value, num, radix);
slouken@1330
   954
    size = SDL_strlen(num);
slouken@1330
   955
    if ( size > maxlen ) {
slouken@1330
   956
        size = maxlen;
slouken@1330
   957
    }
slouken@1336
   958
    SDL_strncpy(text, num, size);
slouken@1330
   959
slouken@1330
   960
    return size;
slouken@1330
   961
}
slouken@1330
   962
#endif /* SDL_HAS_64BIT_TYPE */
slouken@1330
   963
static size_t SDL_PrintFloat(char *text, double arg, size_t maxlen)
slouken@1330
   964
{
slouken@1330
   965
    char *textstart = text;
slouken@1330
   966
    if ( arg ) {
slouken@1330
   967
        /* This isn't especially accurate, but hey, it's easy. :) */
slouken@1330
   968
        const double precision = 0.00000001;
slouken@1330
   969
        size_t len;
slouken@1330
   970
        unsigned long value;
slouken@1330
   971
slouken@1330
   972
        if ( arg < 0 ) {
slouken@1330
   973
            *text++ = '-';
slouken@1330
   974
            --maxlen;
slouken@1330
   975
            arg = -arg;
slouken@1330
   976
        }
slouken@1330
   977
        value = (unsigned long)arg;
slouken@1330
   978
        len = SDL_PrintUnsignedLong(text, value, 10, maxlen);
slouken@1330
   979
        text += len;
slouken@1330
   980
        maxlen -= len;
slouken@1330
   981
        arg -= value;
slouken@1330
   982
        if ( arg > precision && maxlen ) {
slouken@1330
   983
            int mult = 10;
slouken@1330
   984
            *text++ = '.';
slouken@1330
   985
            while ( (arg > precision) && maxlen ) {
slouken@1330
   986
                value = (unsigned long)(arg * mult);
slouken@1330
   987
                len = SDL_PrintUnsignedLong(text, value, 10, maxlen);
slouken@1330
   988
                text += len;
slouken@1330
   989
                maxlen -= len;
slouken@1330
   990
                arg -= (double)value / mult;
slouken@1330
   991
                mult *= 10;
slouken@1330
   992
            }
slouken@1330
   993
        }
slouken@1330
   994
    } else {
slouken@1330
   995
        *text++ = '0';
slouken@1330
   996
    }
slouken@1330
   997
    return (text - textstart);
slouken@1330
   998
}
slouken@1330
   999
static size_t SDL_PrintString(char *text, const char *string, size_t maxlen)
slouken@1330
  1000
{
slouken@1330
  1001
    char *textstart = text;
slouken@1330
  1002
    while ( *string && maxlen-- ) {
slouken@1330
  1003
        *text++ = *string++;
slouken@1330
  1004
    }
slouken@1330
  1005
    return (text - textstart);
slouken@1330
  1006
}
slouken@1330
  1007
int  SDL_vsnprintf(char *text, size_t maxlen, const char *fmt, va_list ap)
slouken@1330
  1008
{
slouken@1330
  1009
    char *textstart = text;
slouken@1330
  1010
    if ( maxlen <= 0 ) {
slouken@1330
  1011
        return 0;
slouken@1330
  1012
    }
slouken@1330
  1013
    --maxlen; /* For the trailing '\0' */
slouken@1330
  1014
    while ( *fmt && maxlen ) {
slouken@1330
  1015
        if ( *fmt == '%' ) {
slouken@1330
  1016
            SDL_bool done = SDL_FALSE;
slouken@1330
  1017
            size_t len = 0;
slouken@1330
  1018
            SDL_bool do_lowercase = SDL_FALSE;
slouken@1330
  1019
            int radix = 10;
slouken@1330
  1020
            enum {
slouken@1330
  1021
                DO_INT,
slouken@1330
  1022
                DO_LONG,
slouken@1330
  1023
                DO_LONGLONG
slouken@1330
  1024
            } inttype = DO_INT;
slouken@1330
  1025
slouken@1330
  1026
            ++fmt;
slouken@1330
  1027
            /* FIXME: implement more of the format specifiers */
slouken@1330
  1028
            while (!done) {
slouken@1330
  1029
                switch(*fmt) {
slouken@1330
  1030
                    case '%':
slouken@1330
  1031
                        *text = '%';
slouken@1330
  1032
                        len = 1;
slouken@1330
  1033
                        done = SDL_TRUE;
slouken@1330
  1034
                        break;
slouken@1330
  1035
                    case 'c':
slouken@1330
  1036
                        /* char is promoted to int when passed through (...) */
slouken@1330
  1037
                        *text = (char)va_arg(ap, int);
slouken@1330
  1038
                        len = 1;
slouken@1330
  1039
                        done = SDL_TRUE;
slouken@1330
  1040
                        break;
slouken@1330
  1041
                    case 'h':
slouken@1330
  1042
                        /* short is promoted to int when passed through (...) */
slouken@1330
  1043
                        break;
slouken@1330
  1044
                    case 'l':
slouken@1330
  1045
                        if ( inttype < DO_LONGLONG ) {
slouken@1330
  1046
                            ++inttype;
slouken@1330
  1047
                        }
slouken@1330
  1048
                        break;
slouken@1330
  1049
                    case 'I':
slouken@1330
  1050
                        if ( SDL_strncmp(fmt, "I64", 3) == 0 ) {
slouken@1330
  1051
                            fmt += 2;
slouken@1330
  1052
                            inttype = DO_LONGLONG;
slouken@1330
  1053
                        }
slouken@1330
  1054
                        break;
slouken@1330
  1055
                    case 'i':
slouken@1330
  1056
                    case 'd':
slouken@1330
  1057
                        switch (inttype) {
slouken@1330
  1058
                            case DO_INT:
slouken@1330
  1059
                                len = SDL_PrintLong(text, (long)va_arg(ap, int), radix, maxlen);
slouken@1330
  1060
                                break;
slouken@1330
  1061
                            case DO_LONG:
slouken@1330
  1062
                                len = SDL_PrintLong(text, va_arg(ap, long), radix, maxlen);
slouken@1330
  1063
                                break;
slouken@1330
  1064
                            case DO_LONGLONG:
slouken@1330
  1065
#ifdef SDL_HAS_64BIT_TYPE
slouken@1330
  1066
                                len = SDL_PrintLongLong(text, va_arg(ap, Sint64), radix, maxlen);
slouken@1330
  1067
#else
slouken@1330
  1068
                                len = SDL_PrintLong(text, va_arg(ap, long), radix, maxlen);
slouken@1330
  1069
#endif
slouken@1330
  1070
                                break;
slouken@1330
  1071
                        }
slouken@1330
  1072
                        done = SDL_TRUE;
slouken@1330
  1073
                        break;
slouken@1330
  1074
                    case 'p':
slouken@1330
  1075
                    case 'x':
slouken@1330
  1076
                        do_lowercase = SDL_TRUE;
slouken@1330
  1077
                        /* Fall through to 'X' handling */
slouken@1330
  1078
                    case 'X':
slouken@1330
  1079
                        if ( radix == 10 ) {
slouken@1330
  1080
                            radix = 16;
slouken@1330
  1081
                        }
slouken@1330
  1082
                        if ( *fmt == 'p' ) {
slouken@1330
  1083
                            inttype = DO_LONG;
slouken@1330
  1084
                        }
slouken@1330
  1085
                        /* Fall through to unsigned handling */
slouken@1330
  1086
                    case 'o':
slouken@1330
  1087
                        if ( radix == 10 ) {
slouken@1330
  1088
                            radix = 8;
slouken@1330
  1089
                        }
slouken@1330
  1090
                        /* Fall through to unsigned handling */
slouken@1330
  1091
                    case 'u':
slouken@1330
  1092
                        switch (inttype) {
slouken@1330
  1093
                            case DO_INT:
slouken@1330
  1094
                                len = SDL_PrintUnsignedLong(text, (unsigned long)va_arg(ap, unsigned int), radix, maxlen);
slouken@1330
  1095
                                break;
slouken@1330
  1096
                            case DO_LONG:
slouken@1330
  1097
                                len = SDL_PrintUnsignedLong(text, va_arg(ap, unsigned long), radix, maxlen);
slouken@1330
  1098
                                break;
slouken@1330
  1099
                            case DO_LONGLONG:
slouken@1330
  1100
#ifdef SDL_HAS_64BIT_TYPE
slouken@1330
  1101
                                len = SDL_PrintUnsignedLongLong(text, va_arg(ap, Uint64), radix, maxlen);
slouken@1330
  1102
#else
slouken@1330
  1103
                                len = SDL_PrintUnsignedLong(text, va_arg(ap, unsigned long), radix, maxlen);
slouken@1330
  1104
#endif
slouken@1330
  1105
                                break;
slouken@1330
  1106
                        }
slouken@1330
  1107
                        if ( do_lowercase ) {
slouken@1336
  1108
                            SDL_strlwr(text);
slouken@1330
  1109
                        }
slouken@1330
  1110
                        done = SDL_TRUE;
slouken@1330
  1111
                        break;
slouken@1330
  1112
                    case 'f':
slouken@1330
  1113
                        len = SDL_PrintFloat(text, va_arg(ap, double), maxlen);
slouken@1330
  1114
                        done = SDL_TRUE;
slouken@1330
  1115
                        break;
slouken@1330
  1116
                    case 's':
slouken@1330
  1117
                        len = SDL_PrintString(text, va_arg(ap, char*), maxlen);
slouken@1330
  1118
                        done = SDL_TRUE;
slouken@1330
  1119
                        break;
slouken@1330
  1120
                    default:
slouken@1330
  1121
                        done = SDL_TRUE;
slouken@1330
  1122
                        break;
slouken@1330
  1123
                }
slouken@1330
  1124
                ++fmt;
slouken@1330
  1125
            }
slouken@1330
  1126
            text += len;
slouken@1330
  1127
            maxlen -= len;
slouken@1330
  1128
        } else {
slouken@1330
  1129
            *text++ = *fmt++;
slouken@1330
  1130
            --maxlen;
slouken@1330
  1131
        }
slouken@1330
  1132
    }
slouken@1330
  1133
    *text = '\0';
slouken@1330
  1134
slouken@1330
  1135
    return (text - textstart);
slouken@1330
  1136
}
slouken@1330
  1137
#endif