Jeongik Cha | 1199caa | 2021-07-20 12:32:58 +0900 | [diff] [blame^] | 1 | /* ---------------------------------------------------------------------------- |
| 2 | libconfig - A library for processing structured configuration files |
| 3 | Copyright (C) 2005-2018 Mark A Lindner |
| 4 | |
| 5 | This file is part of libconfig. |
| 6 | |
| 7 | This library is free software; you can redistribute it and/or |
| 8 | modify it under the terms of the GNU Lesser General Public License |
| 9 | as published by the Free Software Foundation; either version 2.1 of |
| 10 | the License, or (at your option) any later version. |
| 11 | |
| 12 | This library is distributed in the hope that it will be useful, but |
| 13 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | Lesser General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU Library General Public |
| 18 | License along with this library; if not, see |
| 19 | <http://www.gnu.org/licenses/>. |
| 20 | ---------------------------------------------------------------------------- |
| 21 | */ |
| 22 | |
| 23 | #include "util.h" |
| 24 | #include "wincompat.h" |
| 25 | |
| 26 | #include <errno.h> |
| 27 | #include <stdio.h> |
| 28 | #include <stdlib.h> |
| 29 | #include <string.h> |
| 30 | |
| 31 | /* ------------------------------------------------------------------------- */ |
| 32 | |
| 33 | long long libconfig_parse_integer(const char *s, int *ok) |
| 34 | { |
| 35 | long long llval; |
| 36 | char *endptr; |
| 37 | int errsave = errno; |
| 38 | errno = 0; |
| 39 | llval = strtoll(s, &endptr, 0); /* base 10 or base 8 */ |
| 40 | if(*endptr || errno) |
| 41 | { |
| 42 | errno = 0; |
| 43 | *ok = 0; |
| 44 | return(0); /* parse error */ |
| 45 | } |
| 46 | errno = errsave; |
| 47 | |
| 48 | *ok = 1; |
| 49 | return(llval); |
| 50 | } |
| 51 | |
| 52 | /* ------------------------------------------------------------------------- */ |
| 53 | |
| 54 | unsigned long long libconfig_parse_hex64(const char *s) |
| 55 | { |
| 56 | #ifdef __MINGW32__ |
| 57 | |
| 58 | /* MinGW's strtoull() seems to be broken; it only returns the lower |
| 59 | * 32 bits... |
| 60 | */ |
| 61 | |
| 62 | const char *p = s; |
| 63 | unsigned long long val = 0; |
| 64 | |
| 65 | if(*p != '0') |
| 66 | return(0); |
| 67 | |
| 68 | ++p; |
| 69 | |
| 70 | if(*p != 'x' && *p != 'X') |
| 71 | return(0); |
| 72 | |
| 73 | for(++p; isxdigit(*p); ++p) |
| 74 | { |
| 75 | val <<= 4; |
| 76 | val |= ((*p < 'A') ? (*p & 0xF) : (9 + (*p & 0x7))); |
| 77 | } |
| 78 | |
| 79 | return(val); |
| 80 | |
| 81 | #else /* ! __MINGW32__ */ |
| 82 | |
| 83 | return(strtoull(s, NULL, 16)); |
| 84 | |
| 85 | #endif /* __MINGW32__ */ |
| 86 | } |
| 87 | |
| 88 | /* ------------------------------------------------------------------------- */ |
| 89 | |
| 90 | void libconfig_format_double(double val, int precision, int sci_ok, char *buf, |
| 91 | size_t buflen) |
| 92 | { |
| 93 | const char *fmt = sci_ok ? "%.*g" : "%.*f"; |
| 94 | char *p, *q; |
| 95 | |
| 96 | snprintf(buf, buflen - 3, fmt, precision, val); |
| 97 | |
| 98 | /* Check for exponent. */ |
| 99 | p = strchr(buf, 'e'); |
| 100 | if(p) return; |
| 101 | |
| 102 | /* Check for decimal point. */ |
| 103 | p = strchr(buf, '.'); |
| 104 | if(!p) |
| 105 | { |
| 106 | /* No decimal point. Add trailing ".0". */ |
| 107 | strcat(buf, ".0"); |
| 108 | } |
| 109 | else |
| 110 | { |
| 111 | /* Remove any excess trailing 0's after decimal point. */ |
| 112 | for(q = buf + strlen(buf) - 1; q > p + 1; --q) |
| 113 | { |
| 114 | if(*q == '0') |
| 115 | *q = '\0'; |
| 116 | else |
| 117 | break; |
| 118 | } |
| 119 | } |
| 120 | } |
| 121 | |
| 122 | /* ------------------------------------------------------------------------- */ |