fix: consistent usage of bitmask operations on unicode functions - st - Simple Terminal
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---
(DIR) commit 6fc471ccc660b305cf836dcb8d57cdbffb4ed017
(DIR) parent 8b602a37a65a3c001bd9334d8b1cfc17fc5dd45c
(HTM) Author: Markus Teich <markus.teich@stusta.mhn.de>
Date: Sat, 22 Jun 2013 23:06:49 +0200
fix: consistent usage of bitmask operations on unicode functions
Diffstat:
st.c | 50 ++++++++++++++-----------------
1 file changed, 23 insertions(+), 27 deletions(-)
---
(DIR) diff --git a/st.c b/st.c
@@ -150,10 +150,6 @@ enum selection_snap {
SNAP_LINE = 2
};
-/* bit macro */
-#undef B0
-enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
-
ttypedef unsigned char uchar;
ttypedef unsigned int uint;
ttypedef unsigned long ulong;
@@ -527,17 +523,17 @@ utf8decode(char *s, long *u) {
rtn = 1;
c = *s;
- if(~c & B7) { /* 0xxxxxxx */
+ if(~c & 0x80) { /* 0xxxxxxx */
*u = c;
return rtn;
- } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
- *u = c&(B4|B3|B2|B1|B0);
+ } else if((c & 0xE0) == 0xC0) { /* 110xxxxx */
+ *u = c & 0x1F;
n = 1;
- } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
- *u = c&(B3|B2|B1|B0);
+ } else if((c & 0xF0) == 0xE0) { /* 1110xxxx */
+ *u = c & 0x0F;
n = 2;
- } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
- *u = c & (B2|B1|B0);
+ } else if((c & 0xF8) == 0xF0) { /* 11110xxx */
+ *u = c & 0x07;
n = 3;
} else {
goto invalid;
@@ -545,10 +541,10 @@ utf8decode(char *s, long *u) {
for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
c = *s;
- if((c & (B7|B6)) != B7) /* 10xxxxxx */
+ if((c & 0xC0) != 0x80) /* 10xxxxxx */
goto invalid;
*u <<= 6;
- *u |= c & (B5|B4|B3|B2|B1|B0);
+ *u |= c & 0x3F;
}
if((n == 1 && *u < 0x80) ||
@@ -577,20 +573,20 @@ utf8encode(long *u, char *s) {
*sp = uc; /* 0xxxxxxx */
return 1;
} else if(*u < 0x800) {
- *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
+ *sp = (uc >> 6) | 0xC0; /* 110xxxxx */
n = 1;
} else if(uc < 0x10000) {
- *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
+ *sp = (uc >> 12) | 0xE0; /* 1110xxxx */
n = 2;
} else if(uc <= 0x10FFFF) {
- *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
+ *sp = (uc >> 18) | 0xF0; /* 11110xxx */
n = 3;
} else {
goto invalid;
}
for(i=n,++sp; i>0; --i,++sp)
- *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
+ *sp = ((uc >> 6*(i-1)) & 0x3F) | 0x80; /* 10xxxxxx */
return n+1;
invalid:
@@ -613,16 +609,16 @@ isfullutf8(char *s, int b) {
c3 = (uchar *)++s;
if(b < 1) {
return 0;
- } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
+ } else if((*c1 & 0xE0) == 0xC0 && b == 1) {
return 0;
- } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
+ } else if((*c1 & 0xF0) == 0xE0 &&
((b == 1) ||
- ((b == 2) && (*c2&(B7|B6)) == B7))) {
+ ((b == 2) && (*c2 & 0xC0) == 0x80))) {
return 0;
- } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
+ } else if((*c1 & 0xF8) == 0xF0 &&
((b == 1) ||
- ((b == 2) && (*c2&(B7|B6)) == B7) ||
- ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
+ ((b == 2) && (*c2 & 0xC0) == 0x80) ||
+ ((b == 3) && (*c2 & 0xC0) == 0x80 && (*c3 & 0xC0) == 0x80))) {
return 0;
} else {
return 1;
@@ -633,11 +629,11 @@ int
utf8size(char *s) {
uchar c = *s;
- if(~c&B7) {
+ if(~c & 0x80) {
return 1;
- } else if((c&(B7|B6|B5)) == (B7|B6)) {
+ } else if((c & 0xE0) == 0xC0) {
return 2;
- } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
+ } else if((c & 0xF0) == 0xE0) {
return 3;
} else {
return 4;
@@ -3456,7 +3452,7 @@ kpress(XEvent *ev) {
if(len == 1 && e->state & Mod1Mask) {
if(IS_SET(MODE_8BIT)) {
if(*xstr < 0177) {
- c = *xstr | B7;
+ c = *xstr | 0x80;
ret = utf8encode(&c, cp);
cp += ret;
len = 0;