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RichString: refactor writing limited amount of columns

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Closes: #468
This commit is contained in:
Christian Göttsche
2021-01-14 09:59:11 +01:00
committed by cgzones
parent ceee96dcba
commit 08ac22ddb9
3 changed files with 45 additions and 3 deletions
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38
RichString.c
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@ -60,7 +60,37 @@ static inline int RichString_writeFromWide(RichString* this, int attrs, const ch
this->chptr[i] = (CharType) { .attr = attrs & 0xffffff, .chars = { (iswprint(data[j]) ? data[j] : '?') } };
}
return wcswidth(data, len);
return len;
}
int RichString_appendnWideColumns(RichString* this, int attrs, const char* data_c, int len, int* columns) {
wchar_t data[len + 1];
len = mbstowcs(data, data_c, len);
if (len <= 0)
return 0;
int from = this->chlen;
int newLen = from + len;
RichString_setLen(this, newLen);
int columnsWritten = 0;
int pos = from;
for (int j = 0; j < len; j++) {
wchar_t c = iswprint(data[j]) ? data[j] : '?';
int cwidth = wcwidth(c);
if (cwidth > *columns)
break;
*columns -= cwidth;
columnsWritten += cwidth;
this->chptr[pos] = (CharType) { .attr = attrs & 0xffffff, .chars = { c, '\0' } };
pos++;
}
RichString_setLen(this, pos);
*columns = columnsWritten;
return pos - from;
}
static inline int RichString_writeFromAscii(RichString* this, int attrs, const char* data, int from, int len) {
@ -113,6 +143,12 @@ static inline int RichString_writeFromWide(RichString* this, int attrs, const ch
return len;
}
int RichString_appendnWideColumns(RichString* this, int attrs, const char* data_c, int len, int* columns) {
int written = RichString_writeFromWide(this, attrs, data_c, this->chlen, MINIMUM(len, *columns));
*columns = written;
return written;
}
static inline int RichString_writeFromAscii(RichString* this, int attrs, const char* data_c, int from, int len) {
return RichString_writeFromWide(this, attrs, data_c, from, len);
}