dmenu/patch/navhistory.c

127 lines
2.0 KiB
C
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static char *histfile;
static char **history;
static size_t histsz, histpos;
static void
loadhistory(void)
{
FILE *fp = NULL;
static size_t cap = 0;
size_t llen;
char *line;
if (!histfile) {
return;
}
fp = fopen(histfile, "r");
if (!fp) {
return;
}
for (;;) {
line = NULL;
llen = 0;
if (-1 == getline(&line, &llen, fp)) {
if (ferror(fp)) {
die("failed to read history");
}
free(line);
break;
}
if (cap == histsz) {
cap += 64 * sizeof(char*);
history = realloc(history, cap);
if (!history) {
die("failed to realloc memory");
}
}
strtok(line, "\n");
history[histsz] = line;
histsz++;
}
histpos = histsz;
if (fclose(fp)) {
die("failed to close file %s", histfile);
}
}
static void
navhistory(int dir)
{
static char def[BUFSIZ];
char *p = NULL;
size_t len = 0;
if (!history || histpos + 1 == 0)
return;
if (histsz == histpos) {
strncpy(def, text, sizeof(def));
}
switch(dir) {
case 1:
if (histpos < histsz - 1) {
p = history[++histpos];
} else if (histpos == histsz - 1) {
p = def;
histpos++;
}
break;
case -1:
if (histpos > 0) {
p = history[--histpos];
}
break;
}
if (p == NULL) {
return;
}
len = MIN(strlen(p), BUFSIZ - 1);
strncpy(text, p, len);
text[len] = '\0';
cursor = len;
match();
}
static void
savehistory(char *input)
{
unsigned int i;
FILE *fp;
if (!histfile ||
0 == maxhist ||
0 == strlen(input)) {
goto out;
}
fp = fopen(histfile, "w");
if (!fp) {
die("failed to open %s", histfile);
}
for (i = histsz < maxhist ? 0 : histsz - maxhist; i < histsz; i++) {
if (0 >= fprintf(fp, "%s\n", history[i])) {
die("failed to write to %s", histfile);
}
}
if (histsz == 0 || !histnodup || (histsz > 0 && strcmp(input, history[histsz-1]) != 0)) { /* TODO */
if (0 >= fputs(input, fp)) {
die("failed to write to %s", histfile);
}
}
if (fclose(fp)) {
die("failed to close file %s", histfile);
}
out:
for (i = 0; i < histsz; i++) {
free(history[i]);
}
free(history);
2024-07-16 21:42:32 +02:00
}