Method OneInputLine

tools/shell/shell.cpp:571–601

** Retrieve a single line of input text. ** ** If in==0 then read from standard input and prompt before each line. ** If isContinuation is true, then a continuation prompt is appropriate. ** If isContinuation is zero, then the main prompt should be used. ** ** If zPrior is not NULL then it is a buffer from a prior call to this ** routine that can be reused. ** ** The result is stored in space obta

** zPrior argument for reuse.
*/
char *ShellState::OneInputLine(FILE *in, char *zPrior, int isContinuation) {
	if (in) {
		// use local_getline when reading from a file
		// don't print prompt in this scenario
		return local_getline(zPrior, in);
	}

#ifdef HAVE_LINENOISE
	if (rl_version == ReadLineVersion::LINENOISE) {
		// use linenoise
		string prompt_str;
		const char *prompt_text;
		if (!isContinuation) {
			prompt_str = main_prompt->GeneratePrompt(*this);
			prompt_text = prompt_str.c_str();
		} else {
			prompt_text = continuePrompt;
		}
		free(zPrior);
		return linenoise(prompt_text);
	}
#endif
	// using local_getline to read from stdin - print the prompt
	if (!isContinuation) {
		main_prompt->PrintPrompt(*this, PrintOutput::STDOUT);
	} else {
		Print(continuePrompt);
	}
	fflush(stdout);
	return local_getline(zPrior, stdin);
}

/*
** Return the value of a hexadecimal digit.  Return -1 if the input