func_rand.c
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00031 #include "asterisk.h"
00032
00033 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 328209 $")
00034
00035 #include "asterisk/module.h"
00036 #include "asterisk/channel.h"
00037 #include "asterisk/pbx.h"
00038 #include "asterisk/utils.h"
00039 #include "asterisk/app.h"
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00059 static int acf_rand_exec(struct ast_channel *chan, const char *cmd,
00060 char *parse, char *buffer, size_t buflen)
00061 {
00062 int min_int, response_int, max_int;
00063 AST_DECLARE_APP_ARGS(args,
00064 AST_APP_ARG(min);
00065 AST_APP_ARG(max);
00066 );
00067
00068 AST_STANDARD_APP_ARGS(args, parse);
00069
00070 if (ast_strlen_zero(args.min) || sscanf(args.min, "%30d", &min_int) != 1)
00071 min_int = 0;
00072
00073 if (ast_strlen_zero(args.max) || sscanf(args.max, "%30d", &max_int) != 1)
00074 max_int = RAND_MAX;
00075
00076 if (max_int < min_int) {
00077 int tmp = max_int;
00078
00079 max_int = min_int;
00080 min_int = tmp;
00081 ast_debug(1, "max<min\n");
00082 }
00083
00084 response_int = min_int + (ast_random() % (max_int - min_int + 1));
00085 ast_debug(1, "%d was the lucky number in range [%d,%d]\n", response_int, min_int, max_int);
00086 snprintf(buffer, buflen, "%d", response_int);
00087
00088 return 0;
00089 }
00090
00091 static struct ast_custom_function acf_rand = {
00092 .name = "RAND",
00093 .read = acf_rand_exec,
00094 .read_max = 12,
00095 };
00096
00097 static int unload_module(void)
00098 {
00099 ast_custom_function_unregister(&acf_rand);
00100
00101 return 0;
00102 }
00103
00104 static int load_module(void)
00105 {
00106 return ast_custom_function_register(&acf_rand);
00107 }
00108
00109 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Random number dialplan function");