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Functions | |
int | ast_expr (char *expr, char *buf, int length, struct ast_channel *chan) |
Definition in file ast_expr.h.
int ast_expr | ( | char * | expr, | |
char * | buf, | |||
int | length, | |||
struct ast_channel * | chan | |||
) |
Definition at line 2399 of file ast_expr2f.c.
02400 { 02401 struct parse_io io; 02402 int return_value = 0; 02403 02404 memset(&io, 0, sizeof(io)); 02405 io.string = expr; /* to pass to the error routine */ 02406 io.chan = chan; 02407 02408 ast_yylex_init(&io.scanner); 02409 02410 ast_yy_scan_string(expr, io.scanner); 02411 02412 ast_yyparse ((void *) &io); 02413 02414 ast_yylex_destroy(io.scanner); 02415 02416 if (!io.val) { 02417 if (length > 1) { 02418 strcpy(buf, "0"); 02419 return_value = 1; 02420 } 02421 } else { 02422 if (io.val->type == AST_EXPR_number) { 02423 int res_length; 02424 02425 res_length = snprintf(buf, length, FP___PRINTF, io.val->u.i); 02426 return_value = (res_length <= length) ? res_length : length; 02427 } else { 02428 if (io.val->u.s) 02429 #if defined(STANDALONE) || defined(LOW_MEMORY) || defined(STANDALONE) 02430 strncpy(buf, io.val->u.s, length - 1); 02431 #else /* !STANDALONE && !LOW_MEMORY */ 02432 ast_copy_string(buf, io.val->u.s, length); 02433 #endif /* STANDALONE || LOW_MEMORY */ 02434 else 02435 buf[0] = 0; 02436 return_value = strlen(buf); 02437 free(io.val->u.s); 02438 } 02439 free(io.val); 02440 } 02441 return return_value; 02442 }