* Main processing loop for reading lines of input * and sending them to the backend. * * This loop is re-entrant. May be called by \i command * which reads input from a file. */
| 30 | * which reads input from a file. |
| 31 | */ |
| 32 | int |
| 33 | MainLoop(FILE *source) |
| 34 | { |
| 35 | PsqlScanState scan_state; /* lexer working state */ |
| 36 | ConditionalStack cond_stack; /* \if status stack */ |
| 37 | volatile PQExpBuffer query_buf; /* buffer for query being accumulated */ |
| 38 | volatile PQExpBuffer previous_buf; /* if there isn't anything in the new |
| 39 | * buffer yet, use this one for \e, |
| 40 | * etc. */ |
| 41 | PQExpBuffer history_buf; /* earlier lines of a multi-line command, not |
| 42 | * yet saved to readline history */ |
| 43 | char *line; /* current line of input */ |
| 44 | int added_nl_pos; |
| 45 | bool success; |
| 46 | bool line_saved_in_history; |
| 47 | volatile int successResult = EXIT_SUCCESS; |
| 48 | volatile backslashResult slashCmdStatus = PSQL_CMD_UNKNOWN; |
| 49 | volatile promptStatus_t prompt_status = PROMPT_READY; |
| 50 | volatile bool need_redisplay = false; |
| 51 | volatile int count_eof = 0; |
| 52 | volatile bool die_on_error = false; |
| 53 | FILE *prev_cmd_source; |
| 54 | bool prev_cmd_interactive; |
| 55 | uint64 prev_lineno; |
| 56 | |
| 57 | /* Save the prior command source */ |
| 58 | prev_cmd_source = pset.cur_cmd_source; |
| 59 | prev_cmd_interactive = pset.cur_cmd_interactive; |
| 60 | prev_lineno = pset.lineno; |
| 61 | /* pset.stmt_lineno does not need to be saved and restored */ |
| 62 | |
| 63 | /* Establish new source */ |
| 64 | pset.cur_cmd_source = source; |
| 65 | pset.cur_cmd_interactive = ((source == stdin) && !pset.notty); |
| 66 | pset.lineno = 0; |
| 67 | pset.stmt_lineno = 1; |
| 68 | |
| 69 | /* Create working state */ |
| 70 | scan_state = psql_scan_create(&psqlscan_callbacks); |
| 71 | cond_stack = conditional_stack_create(); |
| 72 | psql_scan_set_passthrough(scan_state, (void *) cond_stack); |
| 73 | |
| 74 | query_buf = createPQExpBuffer(); |
| 75 | previous_buf = createPQExpBuffer(); |
| 76 | history_buf = createPQExpBuffer(); |
| 77 | if (PQExpBufferBroken(query_buf) || |
| 78 | PQExpBufferBroken(previous_buf) || |
| 79 | PQExpBufferBroken(history_buf)) |
| 80 | { |
| 81 | pg_log_error("out of memory"); |
| 82 | exit(EXIT_FAILURE); |
| 83 | } |
| 84 | |
| 85 | /* main loop to get queries and execute them */ |
| 86 | while (successResult == EXIT_SUCCESS) |
| 87 | { |
| 88 | /* |
| 89 | * Clean up after a previous Control-C |
no test coverage detected