diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/lib.h | 6 | ||||
| -rw-r--r-- | lib/linestack.c | 61 |
2 files changed, 44 insertions, 23 deletions
@@ -214,9 +214,9 @@ void linestack_insert(struct linestack **lls, long pos, char *line, long len); void linestack_append(struct linestack **lls, char *line); struct linestack *linestack_load(char *name); int crunch_str(char **str, int width, FILE *out, - int (*escout)(FILE *out, wchar_t wc)); -int draw_str(char *start, int width, int (*escout)(FILE *out, wchar_t wc)); -int draw_rstr(char *start, int width, int (*escout)(FILE *out, wchar_t wc)); + int (*escout)(FILE *out, int cols, char **buf)); +int draw_str(char *start, int width); +int draw_rstr(char *start, int width); // interestingtimes.c int xgettty(void); diff --git a/lib/linestack.c b/lib/linestack.c index cc6b6724..83b0e276 100644 --- a/lib/linestack.c +++ b/lib/linestack.c @@ -76,25 +76,43 @@ struct linestack *linestack_load(char *name) return ls; } -// Show width many columns, negative means from right edge. Write unprintable -// chars through escout() instead of write(). If out=0 just measure. -// Returns width in columns. +// Show width many columns, negative means from right edge. +// If out=0 just measure +// if escout, send it unprintable chars, returns columns output or -1 for +// standard escape: ^X if <32, <XX> if invliad UTF8, U+XXXX if UTF8 !iswprint() +// Returns width in columns, moves *str to end of data consumed. int crunch_str(char **str, int width, FILE *out, - int (*escout)(FILE *out, wchar_t wc)) + int (*escout)(FILE *out, int cols, char **buf)) { - int columns = 0, col, bytes, lowlen = escout(0, 0); + int columns = 0, col, bytes; char *start, *end; for (end = start = *str; *end;) { - wchar_t wc; - - if (columns+lowlen>width) break; - - bytes = mbrtowc(&wc, end, 99, 0); - if (bytes<0 || wc<32 || (col = wcwidth(wc))<0) { - bytes = 1; - col = escout(out, *end); - } else if (out) fwrite(end, bytes, 1, out); + wchar_t wc = *end; + + bytes = 0; + if (*end >= ' ' && (bytes = mbrtowc(&wc, end, 99,0))>0 + && (col = wcwidth(wc))>=0) + { + if (width-columns<col) break; + if (out) fwrite(end, bytes, 1, out); + } else if (!escout || 0>(col = escout(out, width-columns, &end))) { + char buf[32]; + + tty_esc("7m"); + if (*end < ' ') { + bytes = 1; + sprintf(buf, "^%c", '@'+*end); + } else if (bytes<1) { + bytes = 1; + sprintf(buf, "<%02X>", *end); + } else sprintf(buf, "U+%04X", wc); + col = strlen(buf); + if (width-columns<col) buf[col = width-columns] = 0; + if (out) fputs(buf, out); + tty_esc("27m"); + } else continue; + columns += col; end += bytes; } *str = end; @@ -102,17 +120,20 @@ int crunch_str(char **str, int width, FILE *out, return columns; } -int draw_str(char *start, int width, int (*escout)(FILE *out, wchar_t wc)) +// Write width chars at start of string to strdout with standard escapes +// Returns length in columns so caller can pad it out with spaces. +int draw_str(char *start, int width) { - return crunch_str(&start, width, stdout, escout); + return crunch_str(&start, width, stdout, 0); } -int draw_rstr(char *start, int width, int (*escout)(FILE *out, wchar_t wc)) +// Write width chars at end of string to stdout with standard escapes +int draw_rstr(char *start, int width) { char *s = start; - int len = crunch_str(&s, -1, 0, escout); + int len = crunch_str(&s, INT_MAX, 0, 0); s = start; - if (len > width) crunch_str(&s, len-width, 0, escout); - return crunch_str(&s, width, stdout, escout); + if (len > width) crunch_str(&s, len-width, 0, 0); + return crunch_str(&s, width, stdout, 0); } |