310 lines
7.5 KiB
C
310 lines
7.5 KiB
C
/* Public Domain Curses */
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#include <curspriv.h>
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RCSID("$Id: util.c,v 1.71 2008/07/13 16:08:18 wmcbrine Exp $")
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/*man-start**************************************************************
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Name: util
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Synopsis:
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char *unctrl(chtype c);
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void filter(void);
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void use_env(bool x);
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int delay_output(int ms);
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int getcchar(const cchar_t *wcval, wchar_t *wch, attr_t *attrs,
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short *color_pair, void *opts);
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int setcchar(cchar_t *wcval, const wchar_t *wch, const attr_t attrs,
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short color_pair, const void *opts);
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wchar_t *wunctrl(cchar_t *wc);
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int PDC_mbtowc(wchar_t *pwc, const char *s, size_t n);
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size_t PDC_mbstowcs(wchar_t *dest, const char *src, size_t n);
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size_t PDC_wcstombs(char *dest, const wchar_t *src, size_t n);
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Description:
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unctrl() expands the text portion of the chtype c into a
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printable string. Control characters are changed to the "^X"
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notation; others are passed through. wunctrl() is the wide-
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character version of the function.
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filter() and use_env() are no-ops in PDCurses.
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delay_output() inserts an ms millisecond pause in output.
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getcchar() works in two modes: When wch is not NULL, it reads
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the cchar_t pointed to by wcval and stores the attributes in
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attrs, the color pair in color_pair, and the text in the
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wide-character string wch. When wch is NULL, getcchar() merely
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returns the number of wide characters in wcval. In either mode,
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the opts argument is unused.
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setcchar constructs a cchar_t at wcval from the wide-character
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text at wch, the attributes in attr and the color pair in
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color_pair. The opts argument is unused.
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Currently, the length returned by getcchar() is always 1 or 0.
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Similarly, setcchar() will only take the first wide character
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from wch, and ignore any others that it "should" take (i.e.,
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combining characters). Nor will it correctly handle any
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character outside the basic multilingual plane (UCS-2).
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Return Value:
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unctrl() and wunctrl() return NULL on failure. delay_output()
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always returns OK.
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getcchar() returns the number of wide characters wcval points to
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when wch is NULL; when it's not, getcchar() returns OK or ERR.
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setcchar() returns OK or ERR.
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Portability X/Open BSD SYS V
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unctrl Y Y Y
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filter Y - 3.0
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use_env Y - 4.0
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delay_output Y Y Y
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getcchar Y
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setcchar Y
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wunctrl Y
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PDC_mbtowc - - -
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PDC_mbstowcs - - -
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PDC_wcstombs - - -
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**man-end****************************************************************/
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#ifdef PDC_WIDE
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# ifdef PDC_FORCE_UTF8
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# include <string.h>
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# else
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# include <stdlib.h>
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# endif
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#endif
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char *unctrl(chtype c)
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{
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static char strbuf[3] = {0, 0, 0};
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chtype ic;
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PDC_LOG(("unctrl() - called\n"));
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ic = c & A_CHARTEXT;
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if (ic >= 0x20 && ic != 0x7f) /* normal characters */
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{
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strbuf[0] = (char)ic;
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strbuf[1] = '\0';
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return strbuf;
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}
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strbuf[0] = '^'; /* '^' prefix */
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if (ic == 0x7f) /* 0x7f == DEL */
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strbuf[1] = '?';
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else /* other control */
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strbuf[1] = (char)(ic + '@');
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return strbuf;
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}
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void filter(void)
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{
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PDC_LOG(("filter() - called\n"));
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}
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void use_env(bool x)
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{
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PDC_LOG(("use_env() - called: x %d\n", x));
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}
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int delay_output(int ms)
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{
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PDC_LOG(("delay_output() - called: ms %d\n", ms));
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return napms(ms);
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}
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#ifdef PDC_WIDE
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int getcchar(const cchar_t *wcval, wchar_t *wch, attr_t *attrs,
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short *color_pair, void *opts)
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{
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if (!wcval)
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return ERR;
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if (wch)
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{
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if (!attrs || !color_pair)
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return ERR;
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*wch = (*wcval & A_CHARTEXT);
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*attrs = (*wcval & (A_ATTRIBUTES & ~A_COLOR));
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*color_pair = PAIR_NUMBER(*wcval & A_COLOR);
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if (*wch)
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*++wch = L'\0';
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return OK;
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}
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else
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return ((*wcval & A_CHARTEXT) != L'\0');
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}
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int setcchar(cchar_t *wcval, const wchar_t *wch, const attr_t attrs,
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short color_pair, const void *opts)
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{
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if (!wcval || !wch)
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return ERR;
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*wcval = *wch | attrs | COLOR_PAIR(color_pair);
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return OK;
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}
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wchar_t *wunctrl(cchar_t *wc)
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{
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static wchar_t strbuf[3] = {0, 0, 0};
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cchar_t ic;
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PDC_LOG(("wunctrl() - called\n"));
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ic = *wc & A_CHARTEXT;
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if (ic >= 0x20 && ic != 0x7f) /* normal characters */
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{
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strbuf[0] = (wchar_t)ic;
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strbuf[1] = L'\0';
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return strbuf;
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}
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strbuf[0] = '^'; /* '^' prefix */
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if (ic == 0x7f) /* 0x7f == DEL */
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strbuf[1] = '?';
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else /* other control */
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strbuf[1] = (wchar_t)(ic + '@');
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return strbuf;
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}
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int PDC_mbtowc(wchar_t *pwc, const char *s, size_t n)
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{
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# ifdef PDC_FORCE_UTF8
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wchar_t key;
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int i = -1;
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const unsigned char *string;
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if (!s || (n < 1))
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return -1;
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if (!*s)
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return 0;
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string = (const unsigned char *)s;
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key = string[0];
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/* Simplistic UTF-8 decoder -- only does the BMP, minimal validation */
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if (key & 0x80)
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{
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if ((key & 0xe0) == 0xc0)
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{
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if (1 < n)
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{
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key = ((key & 0x1f) << 6) | (string[1] & 0x3f);
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i = 2;
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}
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}
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else if ((key & 0xe0) == 0xe0)
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{
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if (2 < n)
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{
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key = ((key & 0x0f) << 12) | ((string[1] & 0x3f) << 6) |
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(string[2] & 0x3f);
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i = 3;
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}
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}
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}
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else
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i = 1;
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if (i)
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*pwc = key;
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return i;
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# else
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return mbtowc(pwc, s, n);
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# endif
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}
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size_t PDC_mbstowcs(wchar_t *dest, const char *src, size_t n)
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{
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# ifdef PDC_FORCE_UTF8
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size_t i = 0, len;
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if (!src || !dest)
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return 0;
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len = strlen(src);
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while (*src && i < n)
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{
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int retval = PDC_mbtowc(dest + i, src, len);
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if (retval < 1)
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return -1;
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src += retval;
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len -= retval;
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i++;
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}
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# else
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size_t i = mbstowcs(dest, src, n);
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# endif
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dest[i] = 0;
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return i;
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}
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size_t PDC_wcstombs(char *dest, const wchar_t *src, size_t n)
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{
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# ifdef PDC_FORCE_UTF8
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size_t i = 0;
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if (!src || !dest)
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return 0;
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while (*src && i < n)
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{
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chtype code = *src++;
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if (code < 0x80)
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{
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dest[i] = code;
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i++;
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}
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else
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if (code < 0x800)
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{
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dest[i] = ((code & 0x07c0) >> 6) | 0xc0;
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dest[i + 1] = (code & 0x003f) | 0x80;
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i += 2;
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}
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else
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{
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dest[i] = ((code & 0xf000) >> 12) | 0xe0;
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dest[i + 1] = ((code & 0x0fc0) >> 6) | 0x80;
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dest[i + 2] = (code & 0x003f) | 0x80;
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i += 3;
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}
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}
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# else
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size_t i = wcstombs(dest, src, n);
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# endif
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dest[i] = '\0';
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return i;
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}
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#endif
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