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Sync to Wine-20050725:
Alexandre Julliard <julliard@winehq.org> - Faster implementation of wcstombs that handles overlapping buffers properly (based on a patch by Dmitry Timoshkov). svn path=/trunk/; revision=17090
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@ -142,45 +142,52 @@ static inline int wcstombs_sbcs( const struct sbcs_table *table,
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ret = -1;
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ret = -1;
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}
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}
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if (dst <= (const char *)src && dst + 16 > (const char *)src)
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while (srclen >= 16)
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{
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{
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/* overlapping buffers, do it char by char */
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dst[0] = uni2cp_low[uni2cp_high[src[0] >> 8] + (src[0] & 0xff)];
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while (srclen--)
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dst[1] = uni2cp_low[uni2cp_high[src[1] >> 8] + (src[1] & 0xff)];
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{
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dst[2] = uni2cp_low[uni2cp_high[src[2] >> 8] + (src[2] & 0xff)];
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*dst++ = uni2cp_low[uni2cp_high[*src >> 8] + (*src & 0xff)];
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dst[3] = uni2cp_low[uni2cp_high[src[3] >> 8] + (src[3] & 0xff)];
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src++;
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dst[4] = uni2cp_low[uni2cp_high[src[4] >> 8] + (src[4] & 0xff)];
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}
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dst[5] = uni2cp_low[uni2cp_high[src[5] >> 8] + (src[5] & 0xff)];
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return ret;
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dst[6] = uni2cp_low[uni2cp_high[src[6] >> 8] + (src[6] & 0xff)];
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}
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dst[7] = uni2cp_low[uni2cp_high[src[7] >> 8] + (src[7] & 0xff)];
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dst[8] = uni2cp_low[uni2cp_high[src[8] >> 8] + (src[8] & 0xff)];
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for (;;)
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dst[9] = uni2cp_low[uni2cp_high[src[9] >> 8] + (src[9] & 0xff)];
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{
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dst[10] = uni2cp_low[uni2cp_high[src[10] >> 8] + (src[10] & 0xff)];
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switch(srclen)
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dst[11] = uni2cp_low[uni2cp_high[src[11] >> 8] + (src[11] & 0xff)];
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{
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dst[12] = uni2cp_low[uni2cp_high[src[12] >> 8] + (src[12] & 0xff)];
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default:
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dst[13] = uni2cp_low[uni2cp_high[src[13] >> 8] + (src[13] & 0xff)];
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case 16: dst[15] = uni2cp_low[uni2cp_high[src[15] >> 8] + (src[15] & 0xff)];
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dst[14] = uni2cp_low[uni2cp_high[src[14] >> 8] + (src[14] & 0xff)];
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case 15: dst[14] = uni2cp_low[uni2cp_high[src[14] >> 8] + (src[14] & 0xff)];
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dst[15] = uni2cp_low[uni2cp_high[src[15] >> 8] + (src[15] & 0xff)];
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case 14: dst[13] = uni2cp_low[uni2cp_high[src[13] >> 8] + (src[13] & 0xff)];
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case 13: dst[12] = uni2cp_low[uni2cp_high[src[12] >> 8] + (src[12] & 0xff)];
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case 12: dst[11] = uni2cp_low[uni2cp_high[src[11] >> 8] + (src[11] & 0xff)];
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case 11: dst[10] = uni2cp_low[uni2cp_high[src[10] >> 8] + (src[10] & 0xff)];
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case 10: dst[9] = uni2cp_low[uni2cp_high[src[9] >> 8] + (src[9] & 0xff)];
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case 9: dst[8] = uni2cp_low[uni2cp_high[src[8] >> 8] + (src[8] & 0xff)];
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case 8: dst[7] = uni2cp_low[uni2cp_high[src[7] >> 8] + (src[7] & 0xff)];
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case 7: dst[6] = uni2cp_low[uni2cp_high[src[6] >> 8] + (src[6] & 0xff)];
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case 6: dst[5] = uni2cp_low[uni2cp_high[src[5] >> 8] + (src[5] & 0xff)];
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case 5: dst[4] = uni2cp_low[uni2cp_high[src[4] >> 8] + (src[4] & 0xff)];
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case 4: dst[3] = uni2cp_low[uni2cp_high[src[3] >> 8] + (src[3] & 0xff)];
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case 3: dst[2] = uni2cp_low[uni2cp_high[src[2] >> 8] + (src[2] & 0xff)];
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case 2: dst[1] = uni2cp_low[uni2cp_high[src[1] >> 8] + (src[1] & 0xff)];
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case 1: dst[0] = uni2cp_low[uni2cp_high[src[0] >> 8] + (src[0] & 0xff)];
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case 0: break;
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}
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if (srclen < 16) return ret;
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dst += 16;
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src += 16;
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src += 16;
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dst += 16;
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srclen -= 16;
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srclen -= 16;
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}
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}
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/* now handle remaining characters */
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src += srclen;
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dst += srclen;
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switch(srclen)
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{
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case 15: dst[-15] = uni2cp_low[uni2cp_high[src[-15] >> 8] + (src[-15] & 0xff)];
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case 14: dst[-14] = uni2cp_low[uni2cp_high[src[-14] >> 8] + (src[-14] & 0xff)];
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case 13: dst[-13] = uni2cp_low[uni2cp_high[src[-13] >> 8] + (src[-13] & 0xff)];
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case 12: dst[-12] = uni2cp_low[uni2cp_high[src[-12] >> 8] + (src[-12] & 0xff)];
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case 11: dst[-11] = uni2cp_low[uni2cp_high[src[-11] >> 8] + (src[-11] & 0xff)];
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case 10: dst[-10] = uni2cp_low[uni2cp_high[src[-10] >> 8] + (src[-10] & 0xff)];
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case 9: dst[-9] = uni2cp_low[uni2cp_high[src[-9] >> 8] + (src[-9] & 0xff)];
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case 8: dst[-8] = uni2cp_low[uni2cp_high[src[-8] >> 8] + (src[-8] & 0xff)];
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case 7: dst[-7] = uni2cp_low[uni2cp_high[src[-7] >> 8] + (src[-7] & 0xff)];
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case 6: dst[-6] = uni2cp_low[uni2cp_high[src[-6] >> 8] + (src[-6] & 0xff)];
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case 5: dst[-5] = uni2cp_low[uni2cp_high[src[-5] >> 8] + (src[-5] & 0xff)];
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case 4: dst[-4] = uni2cp_low[uni2cp_high[src[-4] >> 8] + (src[-4] & 0xff)];
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case 3: dst[-3] = uni2cp_low[uni2cp_high[src[-3] >> 8] + (src[-3] & 0xff)];
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case 2: dst[-2] = uni2cp_low[uni2cp_high[src[-2] >> 8] + (src[-2] & 0xff)];
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case 1: dst[-1] = uni2cp_low[uni2cp_high[src[-1] >> 8] + (src[-1] & 0xff)];
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case 0: break;
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}
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return ret;
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}
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}
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/* slow version of wcstombs_sbcs that handles the various flags */
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/* slow version of wcstombs_sbcs that handles the various flags */
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