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#157: history file stored in ~/.rpn_history

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This commit is contained in:
Louis Rubet 2017-06-22 21:25:48 +02:00
parent 0fed76efcb
commit ee8d007c71
2 changed files with 52 additions and 1 deletions
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4
src/constant.h
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@ -69,4 +69,8 @@ typedef enum {
//
#define CMD_TYPE_STRINGS { "undef", "number", "complex", "string", "symbol", "program", "keyword", "keyword" }
// history
#define HISTORY_FILE ".rpn_history"
#define HISTORY_FILE_MAX_LINES (100)
#endif

49
src/main.cpp
View file

@ -2,6 +2,11 @@
#include <signal.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <pwd.h>
#include <linux/limits.h>
// internal includes
#include "program.hpp"
@ -10,6 +15,40 @@ static heap s_global_heap;
static stack s_global_stack;
static program* s_prog_to_interrupt = NULL;
// actions to be done at rpn exit
void exit_interactive_rpn()
{
struct passwd* pw = getpwuid(getuid());
if (pw != NULL)
{
char history_path[PATH_MAX];
sprintf(history_path, "%s/%s", pw->pw_dir, HISTORY_FILE);
// trunc current history
ofstream history(history_path, ios_base::out|ios_base::trunc);
history.close();
// save it
if (linenoiseHistorySave(history_path) != 0)
fprintf(stderr, "warning, could not save %s (errno=%d, '%s')\n", history_path, errno, strerror(errno));
}
}
// actions to be done at rpn exit
void init_interactive_rpn()
{
struct passwd* pw = getpwuid(getuid());
if (pw != NULL)
{
char history_path[PATH_MAX];
sprintf(history_path, "%s/%s", pw->pw_dir, HISTORY_FILE);
// don't care about errors
linenoiseHistorySetMaxLen(HISTORY_FILE_MAX_LINES);
linenoiseHistoryLoad(history_path);
}
}
// handle CtrlC signal
static void ctrlc_handler(int sig, siginfo_t* siginfo, void* context)
{
@ -18,6 +57,8 @@ static void ctrlc_handler(int sig, siginfo_t* siginfo, void* context)
s_prog_to_interrupt->stop();
s_prog_to_interrupt = NULL;
}
exit_interactive_rpn();
}
// handle SIGSEGV signal
@ -54,7 +95,10 @@ int main(int argc, char* argv[])
// run with interactive prompt
if (argc == 1)
{
//
// init history
init_interactive_rpn();
// entry loop
for (;;)
{
// make program from interactive entry
@ -73,6 +117,9 @@ int main(int argc, char* argv[])
program::show_stack(s_global_stack);
}
}
// manage history and exit
exit_interactive_rpn();
}
// run with cmd line arguments
else