1 /**************************************************************** 2 3 The author of this software is David M. Gay. 4 5 Copyright (C) 2000 by Lucent Technologies 6 All Rights Reserved 7 8 Permission to use, copy, modify, and distribute this software and 9 its documentation for any purpose and without fee is hereby 10 granted, provided that the above copyright notice appear in all 11 copies and that both that the copyright notice and this 12 permission notice and warranty disclaimer appear in supporting 13 documentation, and that the name of Lucent or any of its entities 14 not be used in advertising or publicity pertaining to 15 distribution of the software without specific, written prior 16 permission. 17 18 LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 19 INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. 20 IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY 21 SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 22 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER 23 IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, 24 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF 25 THIS SOFTWARE. 26 27 ****************************************************************/ 28 29 /* Please send bug reports to David M. Gay (dmg at acm dot org, 30 * with " at " changed at "@" and " dot " changed to "."). */ 31 32 /* $FreeBSD$ */ 33 34 #include "gdtoaimp.h" 35 36 static void 37 #ifdef KR_headers 38 L_shift(x, x1, i) ULong *x; ULong *x1; int i; 39 #else 40 L_shift(ULong *x, ULong *x1, int i) 41 #endif 42 { 43 int j; 44 45 i = 8 - i; 46 i <<= 2; 47 j = ULbits - i; 48 do { 49 *x |= x[1] << j; 50 x[1] >>= i; 51 } while(++x < x1); 52 } 53 54 int 55 #ifdef KR_headers 56 hexnan(sp, fpi, x0) 57 CONST char **sp; FPI *fpi; ULong *x0; 58 #else 59 hexnan( CONST char **sp, FPI *fpi, ULong *x0) 60 #endif 61 { 62 ULong c, h, *x, *x1, *xe; 63 CONST char *s; 64 int havedig, hd0, i, nbits; 65 66 if (!hexdig['0']) 67 hexdig_init_D2A(); 68 nbits = fpi->nbits; 69 x = x0 + (nbits >> kshift); 70 if (nbits & kmask) 71 x++; 72 *--x = 0; 73 x1 = xe = x; 74 havedig = hd0 = i = 0; 75 s = *sp; 76 77 /* FreeBSD local: Accept (but ignore) the '0x' prefix. */ 78 if (s[1] == '0' && (s[2] == 'x' || s[2] == 'X')) 79 s += 2; 80 81 while(c = *(CONST unsigned char*)++s) { 82 if (!(h = hexdig[c])) { 83 #if 0 84 if (c <= ' ') { 85 if (hd0 < havedig) { 86 if (x < x1 && i < 8) 87 L_shift(x, x1, i); 88 if (x <= x0) { 89 i = 8; 90 continue; 91 } 92 hd0 = havedig; 93 *--x = 0; 94 x1 = x; 95 i = 0; 96 } 97 continue; 98 } 99 if (/*(*/ c == ')' && havedig) { 100 *sp = s + 1; 101 break; 102 } 103 #endif 104 break; 105 } 106 havedig++; 107 if (++i > 8) { 108 if (x <= x0) 109 continue; 110 i = 1; 111 *--x = 0; 112 } 113 *x = (*x << 4) | h & 0xf; 114 } 115 if (havedig && x < x1 && i < 8) 116 L_shift(x, x1, i); 117 if (x > x0) { 118 x1 = x0; 119 do *x1++ = *x++; 120 while(x <= xe); 121 do *x1++ = 0; 122 while(x1 <= xe); 123 } 124 else { 125 /* truncate high-order word if necessary */ 126 if ( (i = nbits & (ULbits-1)) !=0) 127 *xe &= ((ULong)0xffffffff) >> (ULbits - i); 128 } 129 if (havedig) { 130 for(x1 = xe;; --x1) { 131 if (*x1 != 0) 132 break; 133 if (x1 == x0) { 134 *x1 = 1; 135 break; 136 } 137 } 138 } 139 140 /* 141 * FreeBSD local: Accept all the sequences allowed by C99 and update 142 * the tail pointer correctly. Don't accept any invalid sequences. 143 */ 144 if (c == '\0') /* nan() calls this, too; tolerate a missing ')' */ 145 return STRTOG_NaNbits; 146 if (c != ')') { 147 while(c = *(CONST unsigned char*)++s) { 148 if (c == ')') 149 break; 150 if (!isalnum(c) && c != '_') 151 return STRTOG_NaNbits; 152 } 153 } 154 *sp = s + 1; 155 return STRTOG_NaNbits; 156 } 157