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00027 #include "asterisk.h"
00028
00029 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 163256 $")
00030
00031 #include "asterisk/file.h"
00032 #include "asterisk/channel.h"
00033 #include "asterisk/pbx.h"
00034 #include "asterisk/module.h"
00035 #include "asterisk/app.h"
00036
00037
00038 #define MAXRESULT 1024
00039
00040 struct sortable_keys {
00041 char *key;
00042 float value;
00043 };
00044
00045 static int sort_subroutine(const void *arg1, const void *arg2)
00046 {
00047 const struct sortable_keys *one=arg1, *two=arg2;
00048 if (one->value < two->value)
00049 return -1;
00050 else if (one->value == two->value)
00051 return 0;
00052 else
00053 return 1;
00054 }
00055
00056 #define ERROR_NOARG (-1)
00057 #define ERROR_NOMEM (-2)
00058 #define ERROR_USAGE (-3)
00059
00060 static int sort_internal(struct ast_channel *chan, char *data, char *buffer, size_t buflen)
00061 {
00062 char *strings, *ptrkey, *ptrvalue;
00063 int count=1, count2, element_count=0;
00064 struct sortable_keys *sortable_keys;
00065
00066 *buffer = '\0';
00067
00068 if (!data)
00069 return ERROR_NOARG;
00070
00071 strings = ast_strdupa(data);
00072
00073 for (ptrkey = strings; *ptrkey; ptrkey++) {
00074 if (*ptrkey == ',')
00075 count++;
00076 }
00077
00078 sortable_keys = alloca(count * sizeof(struct sortable_keys));
00079
00080 memset(sortable_keys, 0, count * sizeof(struct sortable_keys));
00081
00082
00083 count2 = 0;
00084 while ((ptrkey = strsep(&strings, ","))) {
00085 ptrvalue = strchr(ptrkey, ':');
00086 if (!ptrvalue) {
00087 count--;
00088 continue;
00089 }
00090 *ptrvalue++ = '\0';
00091 sortable_keys[count2].key = ptrkey;
00092 sscanf(ptrvalue, "%f", &sortable_keys[count2].value);
00093 count2++;
00094 }
00095
00096
00097 qsort(sortable_keys, count, sizeof(struct sortable_keys), sort_subroutine);
00098
00099 for (count2 = 0; count2 < count; count2++) {
00100 int blen = strlen(buffer);
00101 if (element_count++) {
00102 strncat(buffer + blen, ",", buflen - blen - 1);
00103 blen++;
00104 }
00105 strncat(buffer + blen, sortable_keys[count2].key, buflen - blen - 1);
00106 }
00107
00108 return 0;
00109 }
00110
00111 static int cut_internal(struct ast_channel *chan, char *data, char *buffer, size_t buflen)
00112 {
00113 char *parse;
00114 size_t delim_consumed;
00115 AST_DECLARE_APP_ARGS(args,
00116 AST_APP_ARG(varname);
00117 AST_APP_ARG(delimiter);
00118 AST_APP_ARG(field);
00119 );
00120
00121 *buffer = '\0';
00122
00123 parse = ast_strdupa(data);
00124
00125 AST_STANDARD_APP_ARGS(args, parse);
00126
00127
00128 if (args.argc < 3) {
00129 return ERROR_NOARG;
00130 } else {
00131 char d, ds[2] = "";
00132 char *tmp = alloca(strlen(args.varname) + 4);
00133 char varvalue[MAXRESULT], *tmp2=varvalue;
00134
00135 if (tmp) {
00136 snprintf(tmp, strlen(args.varname) + 4, "${%s}", args.varname);
00137 } else {
00138 return ERROR_NOMEM;
00139 }
00140
00141 if (ast_get_encoded_char(args.delimiter, ds, &delim_consumed))
00142 ast_copy_string(ds, "-", sizeof(ds));
00143
00144
00145 d = *ds;
00146
00147 pbx_substitute_variables_helper(chan, tmp, tmp2, MAXRESULT - 1);
00148
00149 if (tmp2) {
00150 int curfieldnum = 1;
00151 while (tmp2 != NULL && args.field != NULL) {
00152 char *nextgroup = strsep(&(args.field), "&");
00153 int num1 = 0, num2 = MAXRESULT;
00154 char trashchar;
00155
00156 if (sscanf(nextgroup, "%d-%d", &num1, &num2) == 2) {
00157
00158 } else if (sscanf(nextgroup, "-%d", &num2) == 1) {
00159
00160 num1 = 0;
00161 } else if ((sscanf(nextgroup, "%d%c", &num1, &trashchar) == 2) && (trashchar == '-')) {
00162
00163 num2 = MAXRESULT;
00164 } else if (sscanf(nextgroup, "%d", &num1) == 1) {
00165
00166 num2 = num1;
00167 } else {
00168 return ERROR_USAGE;
00169 }
00170
00171
00172 if (num1 > 0) {
00173 while (tmp2 != (char *)NULL + 1 && curfieldnum < num1) {
00174 tmp2 = strchr(tmp2, d) + 1;
00175 curfieldnum++;
00176 }
00177 }
00178
00179
00180 if ((num1 > 0) && (curfieldnum > num1))
00181 ast_log(LOG_WARNING, "We're already past the field you wanted?\n");
00182
00183
00184 if (tmp2 == (char *)NULL + 1)
00185 tmp2 = NULL;
00186
00187
00188 while (tmp2 != NULL && curfieldnum <= num2) {
00189 char *tmp3 = strsep(&tmp2, ds);
00190 int curlen = strlen(buffer);
00191
00192 if (curlen)
00193 snprintf(buffer + curlen, buflen - curlen, "%c%s", d, tmp3);
00194 else
00195 snprintf(buffer, buflen, "%s", tmp3);
00196
00197 curfieldnum++;
00198 }
00199 }
00200 }
00201 }
00202 return 0;
00203 }
00204
00205 static int acf_sort_exec(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len)
00206 {
00207 int ret = -1;
00208
00209 switch (sort_internal(chan, data, buf, len)) {
00210 case ERROR_NOARG:
00211 ast_log(LOG_ERROR, "SORT() requires an argument\n");
00212 break;
00213 case ERROR_NOMEM:
00214 ast_log(LOG_ERROR, "Out of memory\n");
00215 break;
00216 case 0:
00217 ret = 0;
00218 break;
00219 default:
00220 ast_log(LOG_ERROR, "Unknown internal error\n");
00221 }
00222
00223 return ret;
00224 }
00225
00226 static int acf_cut_exec(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len)
00227 {
00228 int ret = -1;
00229
00230 switch (cut_internal(chan, data, buf, len)) {
00231 case ERROR_NOARG:
00232 ast_log(LOG_ERROR, "Syntax: CUT(<varname>,<char-delim>,<range-spec>) - missing argument!\n");
00233 break;
00234 case ERROR_NOMEM:
00235 ast_log(LOG_ERROR, "Out of memory\n");
00236 break;
00237 case ERROR_USAGE:
00238 ast_log(LOG_ERROR, "Usage: CUT(<varname>,<char-delim>,<range-spec>)\n");
00239 break;
00240 case 0:
00241 ret = 0;
00242 break;
00243 default:
00244 ast_log(LOG_ERROR, "Unknown internal error\n");
00245 }
00246
00247 return ret;
00248 }
00249
00250 struct ast_custom_function acf_sort = {
00251 .name = "SORT",
00252 .synopsis = "Sorts a list of key/vals into a list of keys, based upon the vals",
00253 .syntax = "SORT(key1:val1[...][,keyN:valN])",
00254 .desc =
00255 "Takes a comma-separated list of keys and values, each separated by a colon, and returns a\n"
00256 "comma-separated list of the keys, sorted by their values. Values will be evaluated as\n"
00257 "floating-point numbers.\n",
00258 .read = acf_sort_exec,
00259 };
00260
00261 struct ast_custom_function acf_cut = {
00262 .name = "CUT",
00263 .synopsis = "Slices and dices strings, based upon a named delimiter.",
00264 .syntax = "CUT(<varname>,<char-delim>,<range-spec>)",
00265 .desc =
00266 " varname - variable you want cut\n"
00267 " char-delim - defaults to '-'\n"
00268 " range-spec - number of the field you want (1-based offset)\n"
00269 " may also be specified as a range (with -)\n"
00270 " or group of ranges and fields (with &)\n",
00271 .read = acf_cut_exec,
00272 };
00273
00274 static int unload_module(void)
00275 {
00276 int res = 0;
00277
00278 res |= ast_custom_function_unregister(&acf_cut);
00279 res |= ast_custom_function_unregister(&acf_sort);
00280
00281 return res;
00282 }
00283
00284 static int load_module(void)
00285 {
00286 int res = 0;
00287
00288 res |= ast_custom_function_register(&acf_cut);
00289 res |= ast_custom_function_register(&acf_sort);
00290
00291 return res;
00292 }
00293
00294 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Cut out information from a string");