forked from speedie/spmenu
91 lines
1.9 KiB
C
91 lines
1.9 KiB
C
/* See LICENSE file for copyright and license details. */
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void loadhistory(void) {
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FILE *fp = NULL;
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static size_t cap = 0;
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size_t llen;
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char *line;
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// no history file, give up like i do with all things in life
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if (!histfile) {
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return;
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}
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// open history file, return if it failed
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fp = fopen(histfile, "r");
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if (!fp) {
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fprintf(stderr, "spmenu: failed to open history file\n");
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return;
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}
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for (;;) {
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line = NULL;
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llen = 0;
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if (-1 == getline(&line, &llen, fp)) {
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if (ferror(fp)) {
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die("spmenu: failed to read history");
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}
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free(line);
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break;
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}
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if (cap == histsz) {
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cap += 64 * sizeof(char*);
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history = realloc(history, cap);
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if (!history) {
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die("spmenu: failed to realloc memory");
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}
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}
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strtok(line, "\n");
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history[histsz] = line;
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histsz++;
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}
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histpos = histsz;
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if (fclose(fp)) {
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die("spmenu: failed to close file %s", histfile);
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}
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}
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void navigatehistfile(int dir) {
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static char def[BUFSIZ];
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char *p = NULL;
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size_t len = 0;
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if (!history || histpos + 1 == 0)
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return;
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if (histsz == histpos) {
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strncpy(def, text, sizeof(def));
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}
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switch (dir) {
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case 1:
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if (histpos < histsz - 1) {
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p = history[++histpos];
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} else if (histpos == histsz - 1) {
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p = def;
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histpos++;
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}
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break;
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case -1:
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if (histpos > 0) {
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p = history[--histpos];
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}
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break;
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}
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if (p == NULL) {
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return;
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}
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len = MIN(strlen(p), BUFSIZ - 1);
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strcpy(text, p);
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text[len] = '\0';
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cursor = len;
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match();
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}
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