| H. Peter Anvin | 22538e2 | 2016-05-25 05:42:47 -0700 | [diff] [blame] | 1 | /* ----------------------------------------------------------------------- * |
| 2 | * |
| 3 | * Copyright 1996-2016 The NASM Authors - All Rights Reserved |
| 4 | * See the file AUTHORS included with the NASM distribution for |
| 5 | * the specific copyright holders. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following |
| 9 | * conditions are met: |
| 10 | * |
| 11 | * * Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * * Redistributions in binary form must reproduce the above |
| 14 | * copyright notice, this list of conditions and the following |
| 15 | * disclaimer in the documentation and/or other materials provided |
| 16 | * with the distribution. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
| 19 | * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
| 20 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 21 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 22 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| 23 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 24 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 25 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 26 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| 29 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
| 30 | * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | * |
| 32 | * ----------------------------------------------------------------------- */ |
| 33 | |
| 34 | /* |
| 35 | * rdstrnum.c |
| 36 | * |
| 37 | * This converts a NASM string to an integer, used when a string |
| 38 | * is used in an integer constant context. This is a binary conversion, |
| 39 | * not a conversion from a numeric constant in text form. |
| 40 | */ |
| 41 | |
| 42 | #include "compiler.h" |
| 43 | #include "nasmlib.h" |
| 44 | #include "nasm.h" |
| 45 | |
| 46 | int64_t readstrnum(char *str, int length, bool *warn) |
| 47 | { |
| 48 | int64_t charconst = 0; |
| 49 | int i; |
| 50 | |
| 51 | *warn = false; |
| 52 | |
| 53 | str += length; |
| 54 | if (globalbits == 64) { |
| 55 | for (i = 0; i < length; i++) { |
| 56 | if (charconst & UINT64_C(0xFF00000000000000)) |
| 57 | *warn = true; |
| 58 | charconst = (charconst << 8) + (uint8_t)*--str; |
| 59 | } |
| 60 | } else { |
| 61 | for (i = 0; i < length; i++) { |
| 62 | if (charconst & 0xFF000000UL) |
| 63 | *warn = true; |
| 64 | charconst = (charconst << 8) + (uint8_t)*--str; |
| 65 | } |
| 66 | } |
| 67 | return charconst; |
| 68 | } |