/* $NetBSD: chartype.c,v 1.35 2019/07/23 10:18:52 christos Exp $ */ /*- * Copyright (c) 2009 The NetBSD Foundation, Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * chartype.c: character classification and meta information */ #include "config.h" #if !defined(lint) && !defined(SCCSID) __RCSID("$NetBSD: chartype.c,v 1.35 2019/07/23 10:18:52 christos Exp $"); #endif /* not lint && not SCCSID */ #include #include #include #include #include "el.h" #define CT_BUFSIZ ((size_t)1024) static int ct_conv_cbuff_resize(ct_buffer_t *, size_t); static int ct_conv_wbuff_resize(ct_buffer_t *, size_t); static int ct_conv_cbuff_resize(ct_buffer_t *conv, size_t csize) { void *p; if (csize <= conv->csize) return 0; conv->csize = csize; p = el_realloc(conv->cbuff, conv->csize * sizeof(*conv->cbuff)); if (p == NULL) { conv->csize = 0; el_free(conv->cbuff); conv->cbuff = NULL; return -1; } conv->cbuff = p; return 0; } static int ct_conv_wbuff_resize(ct_buffer_t *conv, size_t wsize) { void *p; if (wsize <= conv->wsize) return 0; conv->wsize = wsize; p = el_realloc(conv->wbuff, conv->wsize * sizeof(*conv->wbuff)); if (p == NULL) { conv->wsize = 0; el_free(conv->wbuff); conv->wbuff = NULL; return -1; } conv->wbuff = p; return 0; } char * ct_encode_string(const wchar_t *s, ct_buffer_t *conv) { char *dst; ssize_t used; if (!s) return NULL; dst = conv->cbuff; for (;;) { used = (ssize_t)(dst - conv->cbuff); if ((conv->csize - (size_t)used) < 5) { if (ct_conv_cbuff_resize(conv, conv->csize + CT_BUFSIZ) == -1) return NULL; dst = conv->cbuff + used; } if (!*s) break; used = ct_encode_char(dst, (size_t)5, *s); if (used == -1) /* failed to encode, need more buffer space */ abort(); ++s; dst += used; } *dst = '\0'; return conv->cbuff; } wchar_t * ct_decode_string(const char *s, ct_buffer_t *conv) { size_t len; if (!s) return NULL; len = mbstowcs(NULL, s, (size_t)0); if (len == (size_t)-1) return NULL; if (conv->wsize < ++len) if (ct_conv_wbuff_resize(conv, len + CT_BUFSIZ) == -1) return NULL; mbstowcs(conv->wbuff, s, conv->wsize); return conv->wbuff; } libedit_private wchar_t ** ct_decode_argv(int argc, const char *argv[], ct_buffer_t *conv) { size_t bufspace; int i; wchar_t *p; wchar_t **wargv; ssize_t bytes; /* Make sure we have enough space in the conversion buffer to store all * the argv strings. */ for (i = 0, bufspace = 0; i < argc; ++i) bufspace += argv[i] ? strlen(argv[i]) + 1 : 0; if (conv->wsize < ++bufspace) if (ct_conv_wbuff_resize(conv, bufspace + CT_BUFSIZ) == -1) return NULL; wargv = el_calloc((size_t)(argc + 1), sizeof(*wargv)); for (i = 0, p = conv->wbuff; i < argc; ++i) { if (!argv[i]) { /* don't pass null pointers to mbstowcs */ wargv[i] = NULL; continue; } else { wargv[i] = p; bytes = (ssize_t)mbstowcs(p, argv[i], bufspace); } if (bytes == -1) { el_free(wargv); return NULL; } else bytes++; /* include '\0' in the count */ bufspace -= (size_t)bytes; p += bytes; } wargv[i] = NULL; return wargv; } libedit_private size_t ct_enc_width(wchar_t c) { mbstate_t mbs; char buf[MB_LEN_MAX]; size_t size; memset(&mbs, 0, sizeof(mbs)); if ((size = wcrtomb(buf, c, &mbs)) == (size_t)-1) return 0; return size; } libedit_private ssize_t ct_encode_char(char *dst, size_t len, wchar_t c) { ssize_t l = 0; if (len < ct_enc_width(c)) return -1; l = wctomb(dst, c); if (l < 0) { wctomb(NULL, L'\0'); l = 0; } return l; } libedit_private const wchar_t * ct_visual_string(const wchar_t *s, ct_buffer_t *conv) { wchar_t *dst; ssize_t used; if (!s) return NULL; if (ct_conv_wbuff_resize(conv, CT_BUFSIZ) == -1) return NULL; used = 0; dst = conv->wbuff; while (*s) { used = ct_visual_char(dst, conv->wsize - (size_t)(dst - conv->wbuff), *s); if (used != -1) { ++s; dst += used; continue; } /* failed to encode, need more buffer space */ used = dst - conv->wbuff; if (ct_conv_wbuff_resize(conv, conv->wsize + CT_BUFSIZ) == -1) return NULL; dst = conv->wbuff + used; } if (dst >= (conv->wbuff + conv->wsize)) { /* sigh */ used = dst - conv->wbuff; if (ct_conv_wbuff_resize(conv, conv->wsize + CT_BUFSIZ) == -1) return NULL; dst = conv->wbuff + used; } *dst = L'\0'; return conv->wbuff; } libedit_private int ct_visual_width(wchar_t c) { int t = ct_chr_class(c); switch (t) { case CHTYPE_ASCIICTL: return 2; /* ^@ ^? etc. */ case CHTYPE_TAB: return 1; /* Hmm, this really need to be handled outside! */ case CHTYPE_NL: return 0; /* Should this be 1 instead? */ case CHTYPE_PRINT: return wcwidth(c); case CHTYPE_NONPRINT: if (c > 0xffff) /* prefer standard 4-byte display over 5-byte */ return 8; /* \U+12345 */ else return 7; /* \U+1234 */ default: return 0; /* should not happen */ } } libedit_private ssize_t ct_visual_char(wchar_t *dst, size_t len, wchar_t c) { int t = ct_chr_class(c); switch (t) { case CHTYPE_TAB: case CHTYPE_NL: case CHTYPE_ASCIICTL: if (len < 2) return -1; /* insufficient space */ *dst++ = '^'; if (c == '\177') *dst = '?'; /* DEL -> ^? */ else *dst = c | 0100; /* uncontrolify it */ return 2; case CHTYPE_PRINT: if (len < 1) return -1; /* insufficient space */ *dst = c; return 1; case CHTYPE_NONPRINT: /* we only use single-width glyphs for display, * so this is right */ if ((ssize_t)len < ct_visual_width(c)) return -1; /* insufficient space */ *dst++ = '\\'; *dst++ = 'U'; *dst++ = '+'; #define tohexdigit(v) "0123456789ABCDEF"[v] if (c > 0xffff) /* prefer standard 4-byte display over 5-byte */ *dst++ = tohexdigit(((unsigned int) c >> 16) & 0xf); *dst++ = tohexdigit(((unsigned int) c >> 12) & 0xf); *dst++ = tohexdigit(((unsigned int) c >> 8) & 0xf); *dst++ = tohexdigit(((unsigned int) c >> 4) & 0xf); *dst = tohexdigit(((unsigned int) c ) & 0xf); return c > 0xffff ? 8 : 7; /*FALLTHROUGH*/ /* these two should be handled outside this function */ default: /* we should never hit the default */ return 0; } } libedit_private int ct_chr_class(wchar_t c) { if (c == '\t') return CHTYPE_TAB; else if (c == '\n') return CHTYPE_NL; else if (c < 0x100 && iswcntrl(c)) return CHTYPE_ASCIICTL; else if (iswprint(c)) return CHTYPE_PRINT; else return CHTYPE_NONPRINT; }