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#include <config.h>
#include <c.h>
#include "input.h"
#include <pqexpbuffer.h>
/* Note that this file does not depend on any other files in psql. */
/* Runtime options for turning off readline and history */
/* (of course there is no runtime command for doing that :) */
#ifdef USE_READLINE
static bool useReadline;
#endif
#ifdef USE_HISTORY
static bool useHistory;
#endif
/*
* gets_interactive()
*
* Gets a line of interactive input, using readline of desired.
* The result is malloced.
*/
char *
gets_interactive(const char *prompt)
{
char * s;
#ifdef USE_READLINE
if (useReadline) {
s = readline(prompt);
fputc('\r', stdout);
fflush(stdout);
}
else {
#endif
fputs(prompt, stdout);
fflush(stdout);
s = gets_fromFile(stdin);
#ifdef USE_READLINE
}
#endif
#ifdef USE_HISTORY
if (useHistory && s && s[0] != '\0')
add_history(s);
#endif
return s;
}
/*
* gets_fromFile
*
* Gets a line of noninteractive input from a file (which could be stdin).
*/
char *
gets_fromFile(FILE *source)
{
PQExpBufferData buffer;
char line[1024];
initPQExpBuffer(&buffer);
while (fgets(line, 1024, source) != NULL) {
appendPQExpBufferStr(&buffer, line);
if (buffer.data[buffer.len-1] == '\n') {
buffer.data[buffer.len-1] = '\0';
return buffer.data;
}
}
if (buffer.len > 0)
return buffer.data; /* EOF after reading some bufferload(s) */
/* EOF, so return null */
termPQExpBuffer(&buffer);
return NULL;
}
/*
* Put any startup stuff related to input in here. It's good to maintain
* abstraction this way.
*
* The only "flag" right now is 1 for use readline & history.
*/
void
initializeInput(int flags)
{
#ifdef USE_READLINE
if (flags == 1) {
useReadline = true;
rl_readline_name = "psql";
}
#endif
#ifdef USE_HISTORY
if (flags == 1) {
const char * home;
useHistory = true;
using_history();
home = getenv("HOME");
if (home) {
char * psql_history = (char *) malloc(strlen(home) + 20);
if (psql_history) {
sprintf(psql_history, "%s/.psql_history", home);
read_history(psql_history);
free(psql_history);
}
}
}
#endif
}
bool
saveHistory(const char *fname)
{
#ifdef USE_HISTORY
if (useHistory) {
if (write_history(fname) != 0) {
perror(fname);
return false;
}
return true;
}
else
return false;
#else
return false;
#endif
}
void
finishInput(void)
{
#ifdef USE_HISTORY
if (useHistory) {
char * home;
char * psql_history;
home = getenv("HOME");
if (home) {
psql_history = (char *) malloc(strlen(home) + 20);
if (psql_history) {
sprintf(psql_history, "%s/.psql_history", home);
write_history(psql_history);
free(psql_history);
}
}
}
#endif
}
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