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Fix #290: wchar_t may vary in size

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Arun Prakash Jana 2019-06-22 07:19:00 +05:30
parent 42a5479fa8
commit a9392463b0
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GPG key ID: A75979F35C080412
1 changed files with 13 additions and 9 deletions
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22
src/nnn.c
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@ -151,8 +151,8 @@
#define F_CLI (F_NORMAL | F_MULTI)
/* CRC8 macros */
#define WIDTH (sizeof(unsigned char) << 3)
#define TOPBIT (1 << (WIDTH - 1))
#define UCHAR_BIT_WIDTH (sizeof(unsigned char) << 3)
#define TOPBIT (1 << (UCHAR_BIT_WIDTH - 1))
#define POLYNOMIAL 0xD8 /* 11011 followed by 0's */
#define CRC8_TABLE_LEN 256
@ -507,7 +507,7 @@ static uchar crc8fast(const uchar * const message, size_t n)
/* Divide the message by the polynomial, a byte at a time */
while (byte < n) {
data = message[byte] ^ (remainder >> (WIDTH - 8));
data = message[byte] ^ (remainder >> (UCHAR_BIT_WIDTH - 8));
remainder = crc8table[data] ^ (remainder << 8);
++byte;
}
@ -1766,6 +1766,7 @@ static char *xreadline(char *prefill, char *prompt)
{
size_t len, pos;
int x, y, r;
const int WCHAR_T_WIDTH = sizeof(wchar_t);
wint_t ch[2] = {0};
wchar_t * const buf = malloc(sizeof(wchar_t) * CMD_LEN_MAX);
@ -1805,7 +1806,8 @@ static char *xreadline(char *prefill, char *prompt)
case 127: // fallthrough
case '\b': /* rhel25 sends '\b' for backspace */
if (pos > 0) {
memmove(buf + pos - 1, buf + pos, (len - pos) << 2);
memmove(buf + pos - 1, buf + pos,
(len - pos) * WCHAR_T_WIDTH);
--len, --pos;
} // fallthrough
case '\t': /* TAB breaks cursor position, ignore it */
@ -1822,7 +1824,7 @@ static char *xreadline(char *prefill, char *prompt)
continue;
case CONTROL('U'):
printprompt(prompt);
memmove(buf, buf + pos, (len - pos) << 2);
memmove(buf, buf + pos, (len - pos) * WCHAR_T_WIDTH);
len -= pos;
pos = 0;
continue;
@ -1836,7 +1838,8 @@ static char *xreadline(char *prefill, char *prompt)
continue;
if (pos < CMD_LEN_MAX - 1) {
memmove(buf + pos + 1, buf + pos, (len - pos) << 2);
memmove(buf + pos + 1, buf + pos,
(len - pos) * WCHAR_T_WIDTH);
buf[pos] = *ch;
++len, ++pos;
continue;
@ -1853,14 +1856,15 @@ static char *xreadline(char *prefill, char *prompt)
break;
case KEY_BACKSPACE:
if (pos > 0) {
memmove(buf + pos - 1, buf + pos, (len - pos) << 2);
memmove(buf + pos - 1, buf + pos,
(len - pos) * WCHAR_T_WIDTH);
--len, --pos;
}
break;
case KEY_DC:
if (pos < len) {
memmove(buf + pos, buf + pos + 1,
(len - pos - 1) << 2);
(len - pos - 1) * WCHAR_T_WIDTH);
--len;
}
break;
@ -1883,7 +1887,7 @@ END:
clearprompt();
buf[len] = '\0';
wcstombs(g_buf, buf, ++len);
wcstombs(g_buf, buf, CMD_LEN_MAX);
free(buf);
return g_buf;
}