1 | #include "owl.h" |
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2 | #include <pwd.h> |
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3 | #include <sys/stat.h> |
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4 | #include <stdarg.h> |
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5 | #include <glib/gstdio.h> |
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6 | #include <glib-object.h> |
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7 | |
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8 | const char *skiptokens(const char *buff, int n) { |
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9 | /* skips n tokens and returns where that would be. */ |
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10 | char quote = 0; |
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11 | while (*buff && n>0) { |
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12 | while (*buff == ' ') buff++; |
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13 | while (*buff && (quote || *buff != ' ')) { |
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14 | if(quote) { |
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15 | if(*buff == quote) quote = 0; |
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16 | } else if(*buff == '"' || *buff == '\'') { |
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17 | quote = *buff; |
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18 | } |
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19 | buff++; |
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20 | } |
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21 | while (*buff == ' ') buff++; |
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22 | n--; |
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23 | } |
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24 | return buff; |
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25 | } |
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26 | |
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27 | CALLER_OWN char *owl_util_homedir_for_user(const char *name) |
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28 | { |
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29 | int err; |
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30 | struct passwd pw_buf; |
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31 | struct passwd *pw; |
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32 | |
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33 | char *pw_strbuf, *ret; |
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34 | long pw_strbuf_len = sysconf(_SC_GETPW_R_SIZE_MAX); |
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35 | if (pw_strbuf_len < 0) { |
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36 | /* If we really hate ourselves, we can be fancy and loop until we stop |
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37 | * getting ERANGE. For now just pick a random number. */ |
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38 | owl_function_error("owl_util_homedir_for_user: Could not get _SC_GETPW_R_SIZE_MAX"); |
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39 | pw_strbuf_len = 16384; |
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40 | } |
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41 | pw_strbuf = g_new0(char, pw_strbuf_len); |
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42 | err = getpwnam_r(name, &pw_buf, pw_strbuf, pw_strbuf_len, &pw); |
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43 | if (err) { |
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44 | owl_function_error("getpwuid_r: %s", strerror(err)); |
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45 | /* Fall through; pw will be NULL. */ |
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46 | } |
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47 | ret = pw ? g_strdup(pw->pw_dir) : NULL; |
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48 | g_free(pw_strbuf); |
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49 | return ret; |
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50 | } |
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51 | |
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52 | /* Return a "nice" version of the path. Tilde expansion is done, and |
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53 | * duplicate slashes are removed. Caller must free the return. |
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54 | */ |
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55 | CALLER_OWN char *owl_util_makepath(const char *in) |
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56 | { |
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57 | char *out; |
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58 | int i, j; |
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59 | if (in[0] == '~') { |
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60 | /* Attempt tilde-expansion of the first component. Get the |
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61 | tilde-prefix, which goes up to the next slash. */ |
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62 | const char *end = strchr(in + 1, '/'); |
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63 | if (end == NULL) |
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64 | end = in + strlen(in); |
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65 | |
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66 | /* Patch together a new path. Replace the ~ and tilde-prefix with |
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67 | the homedir, if available. */ |
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68 | if (end == in + 1) { |
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69 | /* My home directory. Use the one in owl_global for consistency with |
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70 | * owl_zephyr_dotfile. */ |
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71 | out = g_strconcat(owl_global_get_homedir(&g), end, NULL); |
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72 | } else { |
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73 | /* Someone else's home directory. */ |
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74 | char *user = g_strndup(in + 1, end - (in + 1)); |
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75 | char *home = owl_util_homedir_for_user(user); |
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76 | if (home) { |
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77 | out = g_strconcat(home, end, NULL); |
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78 | } else { |
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79 | out = g_strdup(in); |
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80 | } |
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81 | g_free(home); |
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82 | g_free(user); |
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83 | } |
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84 | } else { |
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85 | out = g_strdup(in); |
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86 | } |
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87 | |
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88 | /* And a quick pass to remove duplicate slashes. */ |
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89 | for (i = j = 0; out[i] != '\0'; i++) { |
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90 | if (out[i] != '/' || i == 0 || out[i-1] != '/') |
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91 | out[j++] = out[i]; |
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92 | } |
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93 | out[j] = '\0'; |
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94 | return out; |
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95 | } |
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96 | |
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97 | void owl_ptr_array_free(GPtrArray *array, GDestroyNotify element_free_func) |
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98 | { |
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99 | /* TODO: when we move to requiring glib 2.22+, use |
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100 | * g_ptr_array_new_with_free_func instead. */ |
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101 | if (element_free_func) |
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102 | g_ptr_array_foreach(array, (GFunc)element_free_func, NULL); |
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103 | g_ptr_array_free(array, true); |
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104 | } |
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105 | |
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106 | /* Break a command line up into argv, argc. The caller must free |
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107 | the returned values with g_strfreev. If there is an error argc will be set |
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108 | to -1, argv will be NULL and the caller does not need to free anything. The |
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109 | returned vector is NULL-terminated. */ |
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110 | CALLER_OWN char **owl_parseline(const char *line, int *argc) |
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111 | { |
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112 | GPtrArray *argv; |
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113 | int i, len, between=1; |
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114 | GString *curarg; |
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115 | char quote; |
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116 | |
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117 | argv = g_ptr_array_new(); |
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118 | len=strlen(line); |
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119 | curarg = g_string_new(""); |
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120 | quote='\0'; |
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121 | if (argc) *argc=0; |
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122 | for (i=0; i<len+1; i++) { |
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123 | /* find the first real character */ |
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124 | if (between) { |
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125 | if (line[i]==' ' || line[i]=='\t' || line[i]=='\0') { |
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126 | continue; |
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127 | } else { |
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128 | between=0; |
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129 | i--; |
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130 | continue; |
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131 | } |
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132 | } |
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133 | |
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134 | /* deal with a quote character */ |
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135 | if (line[i]=='"' || line[i]=="'"[0]) { |
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136 | /* if this type of quote is open, close it */ |
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137 | if (quote==line[i]) { |
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138 | quote='\0'; |
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139 | continue; |
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140 | } |
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141 | |
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142 | /* if no quoting is open then open with this */ |
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143 | if (quote=='\0') { |
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144 | quote=line[i]; |
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145 | continue; |
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146 | } |
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147 | |
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148 | /* if another type of quote is open then treat this as a literal */ |
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149 | g_string_append_c(curarg, line[i]); |
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150 | continue; |
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151 | } |
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152 | |
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153 | /* if it's not a space or end of command, then use it */ |
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154 | if (line[i]!=' ' && line[i]!='\t' && line[i]!='\n' && line[i]!='\0') { |
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155 | g_string_append_c(curarg, line[i]); |
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156 | continue; |
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157 | } |
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158 | |
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159 | /* otherwise, if we're not in quotes, add the whole argument */ |
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160 | if (quote=='\0') { |
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161 | /* add the argument */ |
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162 | g_ptr_array_add(argv, g_string_free(curarg, false)); |
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163 | curarg = g_string_new(""); |
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164 | between=1; |
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165 | continue; |
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166 | } |
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167 | |
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168 | /* if it is a space and we're in quotes, then use it */ |
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169 | g_string_append_c(curarg, line[i]); |
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170 | } |
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171 | |
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172 | if (argc) *argc = argv->len; |
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173 | g_ptr_array_add(argv, NULL); |
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174 | g_string_free(curarg, true); |
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175 | |
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176 | /* check for unbalanced quotes */ |
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177 | if (quote!='\0') { |
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178 | owl_ptr_array_free(argv, g_free); |
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179 | if (argc) *argc = -1; |
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180 | return(NULL); |
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181 | } |
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182 | |
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183 | return (char**)g_ptr_array_free(argv, false); |
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184 | } |
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185 | |
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186 | /* Appends a quoted version of arg suitable for placing in a |
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187 | * command-line to a GString. Does not append a space. */ |
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188 | void owl_string_append_quoted_arg(GString *buf, const char *arg) |
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189 | { |
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190 | const char *argp; |
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191 | if (arg[0] == '\0') { |
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192 | /* Quote the empty string. */ |
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193 | g_string_append(buf, "''"); |
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194 | } else if (arg[strcspn(arg, "'\" \n\t")] == '\0') { |
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195 | /* If there are no nasty characters, return as-is. */ |
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196 | g_string_append(buf, arg); |
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197 | } else if (!strchr(arg, '\'')) { |
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198 | /* Single-quote if possible. */ |
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199 | g_string_append_c(buf, '\''); |
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200 | g_string_append(buf, arg); |
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201 | g_string_append_c(buf, '\''); |
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202 | } else { |
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203 | /* Nasty case: double-quote, but change all internal "s to "'"'" |
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204 | * so that they are single-quoted because we're too cool for |
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205 | * backslashes. |
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206 | */ |
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207 | g_string_append_c(buf, '"'); |
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208 | for (argp = arg; *argp; argp++) { |
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209 | if (*argp == '"') |
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210 | g_string_append(buf, "\"'\"'\""); |
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211 | else |
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212 | g_string_append_c(buf, *argp); |
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213 | } |
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214 | g_string_append_c(buf, '"'); |
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215 | } |
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216 | } |
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217 | |
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218 | /* |
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219 | * Appends 'tmpl' to 'buf', replacing any instances of '%q' with arguments from |
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220 | * the varargs provided, quoting them to be safe for placing in a BarnOwl |
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221 | * command line. |
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222 | */ |
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223 | void owl_string_appendf_quoted(GString *buf, const char *tmpl, ...) |
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224 | { |
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225 | va_list ap; |
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226 | va_start(ap, tmpl); |
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227 | owl_string_vappendf_quoted(buf, tmpl, ap); |
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228 | va_end(ap); |
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229 | } |
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230 | |
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231 | void owl_string_vappendf_quoted(GString *buf, const char *tmpl, va_list ap) |
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232 | { |
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233 | const char *p = tmpl, *last = tmpl; |
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234 | while (true) { |
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235 | p = strchr(p, '%'); |
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236 | if (p == NULL) break; |
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237 | if (*(p+1) != 'q') { |
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238 | p++; |
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239 | if (*p) p++; |
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240 | continue; |
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241 | } |
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242 | g_string_append_len(buf, last, p - last); |
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243 | owl_string_append_quoted_arg(buf, va_arg(ap, char *)); |
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244 | p += 2; last = p; |
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245 | } |
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246 | |
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247 | g_string_append(buf, last); |
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248 | } |
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249 | |
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250 | CALLER_OWN char *owl_string_build_quoted(const char *tmpl, ...) |
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251 | { |
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252 | GString *buf = g_string_new(""); |
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253 | va_list ap; |
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254 | va_start(ap, tmpl); |
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255 | owl_string_vappendf_quoted(buf, tmpl, ap); |
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256 | va_end(ap); |
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257 | return g_string_free(buf, false); |
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258 | } |
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259 | |
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260 | /* Returns a quoted version of arg suitable for placing in a |
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261 | * command-line. Result should be freed with g_free. */ |
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262 | CALLER_OWN char *owl_arg_quote(const char *arg) |
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263 | { |
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264 | GString *buf = g_string_new(""); |
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265 | owl_string_append_quoted_arg(buf, arg); |
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266 | return g_string_free(buf, false); |
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267 | } |
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268 | |
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269 | /* Returns a quoted version of argv. owl_parseline on the result should give |
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270 | * back the input. */ |
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271 | CALLER_OWN char *owl_argv_quote(int argc, const char *const *argv) |
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272 | { |
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273 | int i; |
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274 | GString *buf = g_string_new(""); |
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275 | for (i = 0; i < argc; i++) { |
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276 | if (i > 0) |
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277 | g_string_append_c(buf, ' '); |
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278 | owl_string_append_quoted_arg(buf, argv[i]); |
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279 | } |
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280 | return g_string_free(buf, false); |
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281 | } |
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282 | |
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283 | /* caller must free the return */ |
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284 | CALLER_OWN char *owl_util_format_minutes(int in) |
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285 | { |
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286 | int days, hours; |
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287 | long run; |
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288 | char *out; |
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289 | |
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290 | run=in; |
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291 | |
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292 | days=run/1440; |
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293 | run-=days*1440; |
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294 | hours=run/60; |
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295 | run-=hours*60; |
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296 | |
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297 | if (days>0) { |
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298 | out=g_strdup_printf("%i d %2.2i:%2.2li", days, hours, run); |
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299 | } else { |
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300 | out=g_strdup_printf(" %2.2i:%2.2li", hours, run); |
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301 | } |
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302 | return(out); |
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303 | } |
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304 | |
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305 | CALLER_OWN char *owl_util_format_time(const struct tm *time) |
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306 | { |
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307 | /* 32 chosen for first attempt because timestr will end up being |
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308 | * something like "Www Mmm dd hh:mm:ss AM yyyy UTC\0" */ |
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309 | size_t timestr_size = 16; |
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310 | char *timestr = NULL; |
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311 | do { |
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312 | timestr_size *= 2; |
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313 | timestr = g_renew(char, timestr, timestr_size); |
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314 | } while (strftime(timestr, timestr_size, "%c", time) == 0); |
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315 | return timestr; |
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316 | } |
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317 | |
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318 | /* These are in order of their value in owl.h */ |
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319 | static const struct { |
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320 | int number; |
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321 | const char *name; |
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322 | } color_map[] = { |
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323 | {OWL_COLOR_INVALID, "invalid"}, |
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324 | {OWL_COLOR_DEFAULT, "default"}, |
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325 | {OWL_COLOR_BLACK, "black"}, |
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326 | {OWL_COLOR_RED, "red"}, |
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327 | {OWL_COLOR_GREEN, "green"}, |
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328 | {OWL_COLOR_YELLOW,"yellow"}, |
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329 | {OWL_COLOR_BLUE, "blue"}, |
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330 | {OWL_COLOR_MAGENTA, "magenta"}, |
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331 | {OWL_COLOR_CYAN, "cyan"}, |
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332 | {OWL_COLOR_WHITE, "white"}, |
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333 | }; |
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334 | |
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335 | /* Return the owl color associated with the named color. Return -1 |
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336 | * if the named color is not available |
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337 | */ |
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338 | int owl_util_string_to_color(const char *color) |
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339 | { |
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340 | int c, i; |
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341 | char *p; |
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342 | |
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343 | for (i = 0; i < (sizeof(color_map)/sizeof(color_map[0])); i++) |
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344 | if (strcasecmp(color, color_map[i].name) == 0) |
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345 | return color_map[i].number; |
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346 | |
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347 | c = strtol(color, &p, 10); |
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348 | if (p != color && c >= -1 && c < COLORS) { |
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349 | return(c); |
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350 | } |
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351 | return(OWL_COLOR_INVALID); |
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352 | } |
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353 | |
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354 | /* Return a string name of the given owl color */ |
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355 | const char *owl_util_color_to_string(int color) |
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356 | { |
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357 | if (color >= OWL_COLOR_INVALID && color <= OWL_COLOR_WHITE) |
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358 | return color_map[color - OWL_COLOR_INVALID].name; |
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359 | return("Unknown color"); |
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360 | } |
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361 | |
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362 | /* Get the default tty name. Caller must free the return */ |
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363 | CALLER_OWN char *owl_util_get_default_tty(void) |
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364 | { |
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365 | const char *tmp; |
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366 | char *out; |
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367 | |
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368 | if (getenv("DISPLAY")) { |
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369 | out=g_strdup(getenv("DISPLAY")); |
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370 | } else if ((tmp=ttyname(fileno(stdout)))!=NULL) { |
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371 | out=g_strdup(tmp); |
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372 | if (!strncmp(out, "/dev/", 5)) { |
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373 | g_free(out); |
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374 | out=g_strdup(tmp+5); |
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375 | } |
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376 | } else { |
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377 | out=g_strdup("unknown"); |
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378 | } |
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379 | return(out); |
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380 | } |
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381 | |
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382 | /* strip leading and trailing new lines. Caller must free the |
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383 | * return. |
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384 | */ |
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385 | CALLER_OWN char *owl_util_stripnewlines(const char *in) |
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386 | { |
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387 | |
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388 | char *tmp, *ptr1, *ptr2, *out; |
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389 | |
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390 | ptr1=tmp=g_strdup(in); |
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391 | while (ptr1[0]=='\n') { |
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392 | ptr1++; |
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393 | } |
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394 | ptr2=ptr1+strlen(ptr1)-1; |
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395 | while (ptr2>ptr1 && ptr2[0]=='\n') { |
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396 | ptr2[0]='\0'; |
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397 | ptr2--; |
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398 | } |
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399 | |
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400 | out=g_strdup(ptr1); |
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401 | g_free(tmp); |
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402 | return(out); |
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403 | } |
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404 | |
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405 | |
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406 | /* If filename is a link, recursively resolve symlinks. Otherwise, return the filename |
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407 | * unchanged. On error, call owl_function_error and return NULL. |
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408 | * |
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409 | * This function assumes that filename eventually resolves to an acutal file. |
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410 | * If you want to check this, you should stat() the file first. |
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411 | * |
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412 | * The caller of this function is responsible for freeing the return value. |
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413 | * |
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414 | * Error conditions are the same as g_file_read_link. |
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415 | */ |
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416 | CALLER_OWN gchar *owl_util_recursive_resolve_link(const char *filename) |
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417 | { |
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418 | gchar *last_path = g_strdup(filename); |
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419 | GError *err = NULL; |
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420 | |
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421 | while (g_file_test(last_path, G_FILE_TEST_IS_SYMLINK)) { |
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422 | gchar *link_path = g_file_read_link(last_path, &err); |
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423 | if (link_path == NULL) { |
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424 | owl_function_error("Cannot resolve symlink %s: %s", |
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425 | last_path, err->message); |
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426 | g_error_free(err); |
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427 | g_free(last_path); |
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428 | return NULL; |
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429 | } |
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430 | |
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431 | /* Deal with obnoxious relative paths. If we really care, all this |
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432 | * is racy. Whatever. */ |
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433 | if (!g_path_is_absolute(link_path)) { |
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434 | char *last_dir = g_path_get_dirname(last_path); |
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435 | char *tmp = g_build_filename(last_dir, link_path, NULL); |
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436 | g_free(last_dir); |
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437 | g_free(link_path); |
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438 | link_path = tmp; |
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439 | } |
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440 | |
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441 | g_free(last_path); |
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442 | last_path = link_path; |
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443 | } |
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444 | return last_path; |
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445 | } |
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446 | |
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447 | /* Delete all lines matching "line" from the named file. If no such |
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448 | * line is found the file is left intact. If backup==1 then leave a |
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449 | * backup file containing the original contents. The match is |
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450 | * case-insensitive. |
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451 | * |
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452 | * Returns the number of lines removed on success. Returns -1 on failure. |
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453 | */ |
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454 | int owl_util_file_deleteline(const char *filename, const char *line, int backup) |
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455 | { |
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456 | char *backupfile, *newfile, *buf = NULL; |
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457 | gchar *actual_filename; /* gchar; we need to g_free it */ |
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458 | FILE *old, *new; |
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459 | struct stat st; |
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460 | int numremoved = 0; |
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461 | |
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462 | if ((old = fopen(filename, "r")) == NULL) { |
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463 | owl_function_error("Cannot open %s (for reading): %s", |
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464 | filename, strerror(errno)); |
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465 | return -1; |
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466 | } |
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467 | |
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468 | if (fstat(fileno(old), &st) != 0) { |
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469 | owl_function_error("Cannot stat %s: %s", filename, strerror(errno)); |
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470 | fclose(old); |
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471 | return -1; |
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472 | } |
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473 | |
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474 | /* resolve symlinks, because link() fails on symlinks, at least on AFS */ |
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475 | actual_filename = owl_util_recursive_resolve_link(filename); |
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476 | if (actual_filename == NULL) { |
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477 | fclose(old); |
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478 | return -1; /* resolving the symlink failed, but we already logged this error */ |
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479 | } |
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480 | |
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481 | newfile = g_strdup_printf("%s.new", actual_filename); |
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482 | if ((new = fopen(newfile, "w")) == NULL) { |
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483 | owl_function_error("Cannot open %s (for writing): %s", |
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484 | actual_filename, strerror(errno)); |
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485 | g_free(newfile); |
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486 | fclose(old); |
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487 | g_free(actual_filename); |
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488 | return -1; |
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489 | } |
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490 | |
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491 | if (fchmod(fileno(new), st.st_mode & 0777) != 0) { |
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492 | owl_function_error("Cannot set permissions on %s: %s", |
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493 | actual_filename, strerror(errno)); |
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494 | unlink(newfile); |
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495 | fclose(new); |
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496 | g_free(newfile); |
---|
497 | fclose(old); |
---|
498 | g_free(actual_filename); |
---|
499 | return -1; |
---|
500 | } |
---|
501 | |
---|
502 | while (owl_getline_chomp(&buf, old)) |
---|
503 | if (strcasecmp(buf, line) != 0) |
---|
504 | fprintf(new, "%s\n", buf); |
---|
505 | else |
---|
506 | numremoved++; |
---|
507 | g_free(buf); |
---|
508 | |
---|
509 | fclose(new); |
---|
510 | fclose(old); |
---|
511 | |
---|
512 | if (backup) { |
---|
513 | backupfile = g_strdup_printf("%s.backup", actual_filename); |
---|
514 | unlink(backupfile); |
---|
515 | if (link(actual_filename, backupfile) != 0) { |
---|
516 | owl_function_error("Cannot link %s: %s", backupfile, strerror(errno)); |
---|
517 | g_free(backupfile); |
---|
518 | unlink(newfile); |
---|
519 | g_free(newfile); |
---|
520 | return -1; |
---|
521 | } |
---|
522 | g_free(backupfile); |
---|
523 | } |
---|
524 | |
---|
525 | if (rename(newfile, actual_filename) != 0) { |
---|
526 | owl_function_error("Cannot move %s to %s: %s", |
---|
527 | newfile, actual_filename, strerror(errno)); |
---|
528 | numremoved = -1; |
---|
529 | } |
---|
530 | |
---|
531 | unlink(newfile); |
---|
532 | g_free(newfile); |
---|
533 | |
---|
534 | g_free(actual_filename); |
---|
535 | |
---|
536 | return numremoved; |
---|
537 | } |
---|
538 | |
---|
539 | /* Return the base class or instance from a zephyr class, by removing |
---|
540 | leading `un' or trailing `.d'. |
---|
541 | The caller is responsible for freeing the allocated string. |
---|
542 | */ |
---|
543 | CALLER_OWN char *owl_util_baseclass(const char *class) |
---|
544 | { |
---|
545 | char *start, *end; |
---|
546 | |
---|
547 | while(!strncmp(class, "un", 2)) { |
---|
548 | class += 2; |
---|
549 | } |
---|
550 | |
---|
551 | start = g_strdup(class); |
---|
552 | end = start + strlen(start) - 1; |
---|
553 | while(end > start && *end == 'd' && *(end-1) == '.') { |
---|
554 | end -= 2; |
---|
555 | } |
---|
556 | *(end + 1) = 0; |
---|
557 | |
---|
558 | return start; |
---|
559 | } |
---|
560 | |
---|
561 | const char * owl_get_datadir(void) |
---|
562 | { |
---|
563 | const char * datadir = getenv("BARNOWL_DATA_DIR"); |
---|
564 | if(datadir != NULL) |
---|
565 | return datadir; |
---|
566 | return DATADIR; |
---|
567 | } |
---|
568 | |
---|
569 | const char * owl_get_bindir(void) |
---|
570 | { |
---|
571 | const char * bindir = getenv("BARNOWL_BIN_DIR"); |
---|
572 | if(bindir != NULL) |
---|
573 | return bindir; |
---|
574 | return BINDIR; |
---|
575 | } |
---|
576 | |
---|
577 | /* Strips format characters from a valid utf-8 string. Returns the |
---|
578 | empty string if 'in' does not validate. Caller must free the return. */ |
---|
579 | CALLER_OWN char *owl_strip_format_chars(const char *in) |
---|
580 | { |
---|
581 | char *r; |
---|
582 | if (g_utf8_validate(in, -1, NULL)) { |
---|
583 | const char *s, *p; |
---|
584 | r = g_new(char, strlen(in)+1); |
---|
585 | r[0] = '\0'; |
---|
586 | s = in; |
---|
587 | p = strchr(s, OWL_FMTEXT_UC_STARTBYTE_UTF8); |
---|
588 | while(p) { |
---|
589 | /* If it's a format character, copy up to it, and skip all |
---|
590 | immediately following format characters. */ |
---|
591 | if (owl_fmtext_is_format_char(g_utf8_get_char(p))) { |
---|
592 | strncat(r, s, p-s); |
---|
593 | p = g_utf8_next_char(p); |
---|
594 | while (owl_fmtext_is_format_char(g_utf8_get_char(p))) { |
---|
595 | p = g_utf8_next_char(p); |
---|
596 | } |
---|
597 | s = p; |
---|
598 | p = strchr(s, OWL_FMTEXT_UC_STARTBYTE_UTF8); |
---|
599 | } |
---|
600 | else { |
---|
601 | p = strchr(p+1, OWL_FMTEXT_UC_STARTBYTE_UTF8); |
---|
602 | } |
---|
603 | } |
---|
604 | if (s) strcat(r,s); |
---|
605 | } |
---|
606 | else { |
---|
607 | r = g_strdup(""); |
---|
608 | } |
---|
609 | return r; |
---|
610 | } |
---|
611 | |
---|
612 | /* If in is not UTF-8, convert from ISO-8859-1. We may want to allow |
---|
613 | * the caller to specify an alternative in the future. We also strip |
---|
614 | * out characters in Unicode Plane 16, as we use that plane internally |
---|
615 | * for formatting. |
---|
616 | * Caller must free the return. |
---|
617 | */ |
---|
618 | CALLER_OWN char *owl_validate_or_convert(const char *in) |
---|
619 | { |
---|
620 | if (g_utf8_validate(in, -1, NULL)) { |
---|
621 | return owl_strip_format_chars(in); |
---|
622 | } |
---|
623 | else { |
---|
624 | return g_convert(in, -1, |
---|
625 | "UTF-8", "ISO-8859-1", |
---|
626 | NULL, NULL, NULL); |
---|
627 | } |
---|
628 | } |
---|
629 | /* |
---|
630 | * Validate 'in' as UTF-8, and either return a copy of it, or an empty |
---|
631 | * string if it is invalid utf-8. |
---|
632 | * Caller must free the return. |
---|
633 | */ |
---|
634 | CALLER_OWN char *owl_validate_utf8(const char *in) |
---|
635 | { |
---|
636 | char *out; |
---|
637 | if (g_utf8_validate(in, -1, NULL)) { |
---|
638 | out = g_strdup(in); |
---|
639 | } else { |
---|
640 | out = g_strdup(""); |
---|
641 | } |
---|
642 | return out; |
---|
643 | } |
---|
644 | |
---|
645 | /* This is based on _extract() and _isCJ() from perl's Text::WrapI18N */ |
---|
646 | int owl_util_can_break_after(gunichar c) |
---|
647 | { |
---|
648 | |
---|
649 | if (c == ' ') return 1; |
---|
650 | if (c >= 0x3000 && c <= 0x312f) { |
---|
651 | /* CJK punctuations, Hiragana, Katakana, Bopomofo */ |
---|
652 | if (c == 0x300a || c == 0x300c || c == 0x300e || |
---|
653 | c == 0x3010 || c == 0x3014 || c == 0x3016 || |
---|
654 | c == 0x3018 || c == 0x301a) |
---|
655 | return 0; |
---|
656 | return 1; |
---|
657 | } |
---|
658 | if (c >= 0x31a0 && c <= 0x31bf) {return 1;} /* Bopomofo */ |
---|
659 | if (c >= 0x31f0 && c <= 0x31ff) {return 1;} /* Katakana extension */ |
---|
660 | if (c >= 0x3400 && c <= 0x9fff) {return 1;} /* Han Ideogram */ |
---|
661 | if (c >= 0xf900 && c <= 0xfaff) {return 1;} /* Han Ideogram */ |
---|
662 | if (c >= 0x20000 && c <= 0x2ffff) {return 1;} /* Han Ideogram */ |
---|
663 | return 0; |
---|
664 | } |
---|
665 | |
---|
666 | /* caller must free the return */ |
---|
667 | CALLER_OWN char *owl_escape_highbit(const char *str) |
---|
668 | { |
---|
669 | GString *out = g_string_new(""); |
---|
670 | unsigned char c; |
---|
671 | while((c = (*str++))) { |
---|
672 | if(c == '\\') { |
---|
673 | g_string_append(out, "\\\\"); |
---|
674 | } else if(c & 0x80) { |
---|
675 | g_string_append_printf(out, "\\x%02x", (int)c); |
---|
676 | } else { |
---|
677 | g_string_append_c(out, c); |
---|
678 | } |
---|
679 | } |
---|
680 | return g_string_free(out, 0); |
---|
681 | } |
---|
682 | |
---|
683 | /* innards of owl_getline{,_chomp} below */ |
---|
684 | static int owl_getline_internal(char **s, FILE *fp, int newline) |
---|
685 | { |
---|
686 | int size = 0; |
---|
687 | int target = 0; |
---|
688 | int count = 0; |
---|
689 | int c; |
---|
690 | |
---|
691 | while (1) { |
---|
692 | c = getc(fp); |
---|
693 | if ((target + 1) > size) { |
---|
694 | size += BUFSIZ; |
---|
695 | *s = g_renew(char, *s, size); |
---|
696 | } |
---|
697 | if (c == EOF) |
---|
698 | break; |
---|
699 | count++; |
---|
700 | if (c != '\n' || newline) |
---|
701 | (*s)[target++] = c; |
---|
702 | if (c == '\n') |
---|
703 | break; |
---|
704 | } |
---|
705 | (*s)[target] = 0; |
---|
706 | |
---|
707 | return count; |
---|
708 | } |
---|
709 | |
---|
710 | /* Read a line from fp, allocating memory to hold it, returning the number of |
---|
711 | * byte read. *s should either be NULL or a pointer to memory allocated with |
---|
712 | * g_malloc; it will be g_renew'd as appropriate. The caller must |
---|
713 | * eventually free it. (This is roughly the interface of getline in the gnu |
---|
714 | * libc). |
---|
715 | * |
---|
716 | * The final newline will be included if it's there. |
---|
717 | */ |
---|
718 | int owl_getline(char **s, FILE *fp) |
---|
719 | { |
---|
720 | return owl_getline_internal(s, fp, 1); |
---|
721 | } |
---|
722 | |
---|
723 | /* As above, but omitting the final newline */ |
---|
724 | int owl_getline_chomp(char **s, FILE *fp) |
---|
725 | { |
---|
726 | return owl_getline_internal(s, fp, 0); |
---|
727 | } |
---|
728 | |
---|
729 | /* Read the rest of the input available in fp into a string. */ |
---|
730 | CALLER_OWN char *owl_slurp(FILE *fp) |
---|
731 | { |
---|
732 | char *buf = NULL; |
---|
733 | char *p; |
---|
734 | int size = 0; |
---|
735 | int count; |
---|
736 | |
---|
737 | while (1) { |
---|
738 | buf = g_renew(char, buf, size + BUFSIZ); |
---|
739 | p = &buf[size]; |
---|
740 | size += BUFSIZ; |
---|
741 | |
---|
742 | if ((count = fread(p, 1, BUFSIZ, fp)) < BUFSIZ) |
---|
743 | break; |
---|
744 | } |
---|
745 | p[count] = 0; |
---|
746 | |
---|
747 | return buf; |
---|
748 | } |
---|
749 | |
---|
750 | int owl_util_get_colorpairs(void) { |
---|
751 | #ifndef NCURSES_EXT_COLORS |
---|
752 | /* Without ext-color support (an ABI change), ncurses only supports 256 |
---|
753 | * different color pairs. However, it gives us a larger number even if your |
---|
754 | * ncurses is compiled without ext-color. */ |
---|
755 | return MIN(COLOR_PAIRS, 256); |
---|
756 | #else |
---|
757 | return COLOR_PAIRS; |
---|
758 | #endif |
---|
759 | } |
---|
760 | |
---|
761 | gulong owl_dirty_window_on_signal(owl_window *w, gpointer sender, const gchar *detailed_signal) |
---|
762 | { |
---|
763 | return owl_signal_connect_object(sender, detailed_signal, G_CALLBACK(owl_window_dirty), w, G_CONNECT_SWAPPED); |
---|
764 | } |
---|
765 | |
---|
766 | typedef struct { /*noproto*/ |
---|
767 | GObject *sender; |
---|
768 | gulong signal_id; |
---|
769 | } SignalData; |
---|
770 | |
---|
771 | static void _closure_invalidated(gpointer data, GClosure *closure); |
---|
772 | |
---|
773 | /* |
---|
774 | * GObject's g_signal_connect_object has a documented bug. This function is |
---|
775 | * identical except it does not leak the signal handler. |
---|
776 | */ |
---|
777 | gulong owl_signal_connect_object(gpointer sender, const gchar *detailed_signal, GCallback c_handler, gpointer receiver, GConnectFlags connect_flags) |
---|
778 | { |
---|
779 | g_return_val_if_fail (G_TYPE_CHECK_INSTANCE (sender), 0); |
---|
780 | g_return_val_if_fail (detailed_signal != NULL, 0); |
---|
781 | g_return_val_if_fail (c_handler != NULL, 0); |
---|
782 | |
---|
783 | if (receiver) { |
---|
784 | SignalData *sdata; |
---|
785 | GClosure *closure; |
---|
786 | gulong signal_id; |
---|
787 | |
---|
788 | g_return_val_if_fail (G_IS_OBJECT (receiver), 0); |
---|
789 | |
---|
790 | closure = ((connect_flags & G_CONNECT_SWAPPED) ? g_cclosure_new_object_swap : g_cclosure_new_object) (c_handler, receiver); |
---|
791 | signal_id = g_signal_connect_closure (sender, detailed_signal, closure, connect_flags & G_CONNECT_AFTER); |
---|
792 | |
---|
793 | /* Register the missing hooks */ |
---|
794 | sdata = g_slice_new0(SignalData); |
---|
795 | sdata->sender = sender; |
---|
796 | sdata->signal_id = signal_id; |
---|
797 | |
---|
798 | g_closure_add_invalidate_notifier(closure, sdata, _closure_invalidated); |
---|
799 | |
---|
800 | return signal_id; |
---|
801 | } else { |
---|
802 | return g_signal_connect_data(sender, detailed_signal, c_handler, NULL, NULL, connect_flags); |
---|
803 | } |
---|
804 | } |
---|
805 | |
---|
806 | /* |
---|
807 | * There are three ways the signal could come to an end: |
---|
808 | * |
---|
809 | * 1. The user explicitly disconnects it with the returned signal_id. |
---|
810 | * - In that case, the disconnection unref's the closure, causing it |
---|
811 | * to first be invalidated. The handler's already disconnected, so |
---|
812 | * we have no work to do. |
---|
813 | * 2. The sender gets destroyed. |
---|
814 | * - GObject will disconnect each signal which then goes into the above |
---|
815 | * case. Our handler does no work. |
---|
816 | * 3. The receiver gets destroyed. |
---|
817 | * - The GClosure was created by g_cclosure_new_object_{,swap} which gets |
---|
818 | * invalidated when the receiver is destroyed. We then follow through case 1 |
---|
819 | * again, but *this* time, the handler has not been disconnected. We then |
---|
820 | * clean up ourselves. |
---|
821 | * |
---|
822 | * We can't actually hook into this process earlier with weakrefs as GObject |
---|
823 | * will, on object dispose, first disconnect signals, then invalidate closures, |
---|
824 | * and notify weakrefs last. |
---|
825 | */ |
---|
826 | static void _closure_invalidated(gpointer data, GClosure *closure) |
---|
827 | { |
---|
828 | SignalData *sdata = data; |
---|
829 | if (g_signal_handler_is_connected(sdata->sender, sdata->signal_id)) { |
---|
830 | g_signal_handler_disconnect(sdata->sender, sdata->signal_id); |
---|
831 | } |
---|
832 | g_slice_free(SignalData, sdata); |
---|
833 | } |
---|
834 | |
---|