1 | #include <machine/rtems-bsd-user-space.h> |
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2 | |
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3 | /* |
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4 | * Copyright (c) 1996 by Internet Software Consortium. |
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5 | * |
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6 | * Permission to use, copy, modify, and distribute this software for any |
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7 | * purpose with or without fee is hereby granted, provided that the above |
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8 | * copyright notice and this permission notice appear in all copies. |
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9 | * |
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10 | * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS |
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11 | * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES |
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12 | * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE |
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13 | * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
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14 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
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15 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS |
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16 | * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS |
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17 | * SOFTWARE. |
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18 | */ |
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19 | |
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20 | /* Import. */ |
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21 | |
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22 | #if HAVE_CONFIG_H |
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23 | #include "config.h" |
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24 | #endif |
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25 | |
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26 | #include <arpa/nameser.h> |
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27 | |
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28 | #include <ctype.h> |
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29 | #include <errno.h> |
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30 | #include <stdio.h> |
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31 | #include <string.h> |
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32 | |
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33 | #define SPRINTF(x) ((size_t)sprintf x) |
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34 | |
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35 | /* Forward. */ |
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36 | |
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37 | static int fmt1(int t, char s, char **buf, size_t *buflen); |
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38 | |
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39 | /* Macros. */ |
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40 | |
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41 | #define T(x) if ((x) < 0) return (-1); else (void)NULL |
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42 | |
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43 | /* Public. */ |
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44 | |
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45 | int |
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46 | ns_format_ttl(u_long src, char *dst, size_t dstlen) { |
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47 | char *odst = dst; |
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48 | int secs, mins, hours, days, weeks, x; |
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49 | char *p; |
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50 | |
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51 | secs = src % 60; src /= 60; |
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52 | mins = src % 60; src /= 60; |
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53 | hours = src % 24; src /= 24; |
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54 | days = src % 7; src /= 7; |
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55 | weeks = src; src = 0; |
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56 | |
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57 | x = 0; |
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58 | if (weeks) { |
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59 | T(fmt1(weeks, 'W', &dst, &dstlen)); |
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60 | x++; |
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61 | } |
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62 | if (days) { |
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63 | T(fmt1(days, 'D', &dst, &dstlen)); |
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64 | x++; |
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65 | } |
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66 | if (hours) { |
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67 | T(fmt1(hours, 'H', &dst, &dstlen)); |
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68 | x++; |
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69 | } |
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70 | if (mins) { |
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71 | T(fmt1(mins, 'M', &dst, &dstlen)); |
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72 | x++; |
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73 | } |
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74 | if (secs || !(weeks || days || hours || mins)) { |
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75 | T(fmt1(secs, 'S', &dst, &dstlen)); |
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76 | x++; |
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77 | } |
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78 | |
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79 | if (x > 1) { |
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80 | int ch; |
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81 | |
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82 | for (p = odst; (ch = *p) != '\0'; p++) |
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83 | if (isascii(ch) && isupper(ch)) |
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84 | *p = tolower(ch); |
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85 | } |
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86 | |
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87 | return (dst - odst); |
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88 | } |
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89 | |
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90 | int |
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91 | ns_parse_ttl(const char *src, u_long *dst) { |
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92 | u_long ttl, tmp; |
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93 | int ch, digits, dirty; |
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94 | |
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95 | ttl = 0; |
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96 | tmp = 0; |
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97 | digits = 0; |
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98 | dirty = 0; |
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99 | while ((ch = *src++) != '\0') { |
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100 | if (!isascii(ch) || !isprint(ch)) |
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101 | goto einval; |
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102 | if (isdigit(ch)) { |
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103 | tmp *= 10; |
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104 | tmp += (ch - '0'); |
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105 | digits++; |
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106 | continue; |
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107 | } |
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108 | if (digits == 0) |
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109 | goto einval; |
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110 | if (islower(ch)) |
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111 | ch = toupper(ch); |
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112 | switch (ch) { |
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113 | case 'W': tmp *= 7; |
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114 | case 'D': tmp *= 24; |
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115 | case 'H': tmp *= 60; |
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116 | case 'M': tmp *= 60; |
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117 | case 'S': break; |
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118 | default: goto einval; |
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119 | } |
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120 | ttl += tmp; |
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121 | tmp = 0; |
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122 | digits = 0; |
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123 | dirty = 1; |
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124 | } |
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125 | if (digits > 0) { |
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126 | if (dirty) |
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127 | goto einval; |
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128 | else |
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129 | ttl += tmp; |
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130 | } |
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131 | *dst = ttl; |
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132 | return (0); |
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133 | |
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134 | einval: |
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135 | errno = EINVAL; |
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136 | return (-1); |
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137 | } |
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138 | |
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139 | /* Private. */ |
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140 | |
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141 | static int |
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142 | fmt1(int t, char s, char **buf, size_t *buflen) { |
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143 | char tmp[50]; |
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144 | size_t len; |
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145 | |
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146 | len = SPRINTF((tmp, "%d%c", t, s)); |
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147 | if (len + 1 > *buflen) |
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148 | return (-1); |
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149 | strcpy(*buf, tmp); |
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150 | *buf += len; |
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151 | *buflen -= len; |
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152 | return (0); |
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153 | } |
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