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#include <errno.h>
#include <string.h>
#include "jimautoconf.h"
#include <jim.h>
#ifdef USE_LINENOISE
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "linenoise.h"
#else
#define MAX_LINE_LEN 512
#endif
/**
* Returns an allocated line, or NULL if EOF.
*/
char *Jim_HistoryGetline(const char *prompt)
{
#ifdef USE_LINENOISE
return linenoise(prompt);
#else
int len;
char *line = malloc(MAX_LINE_LEN);
fputs(prompt, stdout);
fflush(stdout);
if (fgets(line, MAX_LINE_LEN, stdin) == NULL) {
free(line);
return NULL;
}
len = strlen(line);
if (len && line[len - 1] == '\n') {
line[len - 1] = '\0';
}
return line;
#endif
}
void Jim_HistoryLoad(const char *filename)
{
#ifdef USE_LINENOISE
linenoiseHistoryLoad(filename);
#endif
}
void Jim_HistoryAdd(const char *line)
{
#ifdef USE_LINENOISE
linenoiseHistoryAdd(line);
#endif
}
void Jim_HistorySave(const char *filename)
{
#ifdef USE_LINENOISE
linenoiseHistorySave(filename);
#endif
}
void Jim_HistoryShow(void)
{
#ifdef USE_LINENOISE
/* built-in history command */
int i;
int len;
char **history = linenoiseHistory(&len);
for (i = 0; i < len; i++) {
printf("%4d %s\n", i + 1, history[i]);
}
#endif
}
int Jim_InteractivePrompt(Jim_Interp *interp)
{
int retcode = JIM_OK;
char *history_file = NULL;
#ifdef USE_LINENOISE
const char *home;
home = getenv("HOME");
if (home && isatty(STDIN_FILENO)) {
int history_len = strlen(home) + sizeof("/.jim_history");
history_file = Jim_Alloc(history_len);
snprintf(history_file, history_len, "%s/.jim_history", home);
Jim_HistoryLoad(history_file);
}
#endif
printf("Welcome to Jim version %d.%d\n",
JIM_VERSION / 100, JIM_VERSION % 100);
Jim_SetVariableStrWithStr(interp, JIM_INTERACTIVE, "1");
while (1) {
Jim_Obj *scriptObjPtr;
const char *result;
int reslen;
char prompt[20];
if (retcode != JIM_OK) {
const char *retcodestr = Jim_ReturnCode(retcode);
if (*retcodestr == '?') {
snprintf(prompt, sizeof(prompt) - 3, "[%d] . ", retcode);
}
else {
snprintf(prompt, sizeof(prompt) - 3, "[%s] . ", retcodestr);
}
}
else {
strcpy(prompt, ". ");
}
scriptObjPtr = Jim_NewStringObj(interp, "", 0);
Jim_IncrRefCount(scriptObjPtr);
while (1) {
char state;
char *line;
line = Jim_HistoryGetline(prompt);
if (line == NULL) {
if (errno == EINTR) {
continue;
}
Jim_DecrRefCount(interp, scriptObjPtr);
retcode = JIM_OK;
goto out;
}
if (Jim_Length(scriptObjPtr) != 0) {
/* Line continuation */
Jim_AppendString(interp, scriptObjPtr, "\n", 1);
}
Jim_AppendString(interp, scriptObjPtr, line, -1);
free(line);
if (Jim_ScriptIsComplete(interp, scriptObjPtr, &state))
break;
snprintf(prompt, sizeof(prompt), "%c> ", state);
}
#ifdef USE_LINENOISE
if (strcmp(Jim_String(scriptObjPtr), "h") == 0) {
/* built-in history command */
Jim_HistoryShow();
Jim_DecrRefCount(interp, scriptObjPtr);
continue;
}
Jim_HistoryAdd(Jim_String(scriptObjPtr));
if (history_file) {
Jim_HistorySave(history_file);
}
#endif
retcode = Jim_EvalObj(interp, scriptObjPtr);
Jim_DecrRefCount(interp, scriptObjPtr);
if (retcode == JIM_EXIT) {
break;
}
if (retcode == JIM_ERR) {
Jim_MakeErrorMessage(interp);
}
result = Jim_GetString(Jim_GetResult(interp), &reslen);
if (reslen) {
printf("%s\n", result);
}
}
out:
Jim_Free(history_file);
return retcode;
}
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