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IABSD.fr/src/lib/libedit/chartype.c
yasuoka
- lib/libedit/chartype.c
-
/* $OpenBSD: chartype.c,v 1.16 2019/01/29 09:47:00 yasuoka Exp $ */ /* $NetBSD: chartype.c,v 1.6 2011/07/28 00:48:21 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" #include <ctype.h> #include <stdlib.h> #include <string.h> #include "el.h" #define CT_BUFSIZ 1024 static void ct_conv_buff_resize(ct_buffer_t *, size_t, size_t); static void ct_conv_buff_resize(ct_buffer_t *conv, size_t mincsize, size_t minwsize) { void *p; if (mincsize > conv->csize) { conv->csize = mincsize; p = reallocarray(conv->cbuff, conv->csize, sizeof(char)); if (p == NULL) { conv->csize = 0; free(conv->cbuff); conv->cbuff = NULL; } else conv->cbuff = p; } if (minwsize > conv->wsize) { conv->wsize = minwsize; p = reallocarray(conv->wbuff, conv->wsize, sizeof(wchar_t)); if (p == NULL) { conv->wsize = 0; free(conv->wbuff); conv->wbuff = NULL; } else conv->wbuff = p; } } char * ct_encode_string(const wchar_t *s, ct_buffer_t *conv) { char *dst; ssize_t used = 0; if (!s) return NULL; if (!conv->cbuff) ct_conv_buff_resize(conv, CT_BUFSIZ, 0); if (!conv->cbuff) return NULL; dst = conv->cbuff; while (*s) { used = conv->csize - (dst - conv->cbuff); if (used < 5) { used = dst - conv->cbuff; ct_conv_buff_resize(conv, conv->csize + CT_BUFSIZ, 0); if (!conv->cbuff) return NULL; dst = conv->cbuff + used; } used = ct_encode_char(dst, 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 = 0; if (!s) return NULL; if (!conv->wbuff) ct_conv_buff_resize(conv, 0, CT_BUFSIZ); if (!conv->wbuff) return NULL; len = mbstowcs(NULL, s, 0); if (len == (size_t)-1) return NULL; if (len > conv->wsize) ct_conv_buff_resize(conv, 0, len + 1); if (!conv->wbuff) return NULL; mbstowcs(conv->wbuff, s, conv->wsize); return conv->wbuff; } protected 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; size_t wlen; /* 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; ct_conv_buff_resize(conv, 0, bufspace * sizeof(*p)); if (!conv->wsize) return NULL; wargv = reallocarray(NULL, 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; wlen = mbstowcs(p, argv[i], bufspace); } if (wlen == (size_t)-1 || wlen == bufspace) { /* Encoding error or not enough room for NUL. */ free(wargv); return NULL; } else wlen++; /* include NUL in the count */ bufspace -= wlen; p += wlen; } wargv[i] = NULL; return wargv; } protected size_t ct_enc_width(wchar_t c) { /* UTF-8 encoding specific values */ if (c < 0x80) return 1; else if (c < 0x0800) return 2; else if (c < 0x10000) return 3; else if (c < 0x110000) return 4; else return 0; /* not a valid codepoint */ } protected 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; } protected const wchar_t * ct_visual_string(const wchar_t *s) { static wchar_t *buff = NULL; static size_t buffsize = 0; void *p; wchar_t *dst; ssize_t used = 0; if (!s) return NULL; if (!buff) { buffsize = CT_BUFSIZ; buff = reallocarray(NULL, buffsize, sizeof(*buff)); } dst = buff; while (*s) { used = ct_visual_char(dst, buffsize - (dst - buff), *s); if (used == -1) { /* failed to encode, need more buffer space */ used = dst - buff; buffsize += CT_BUFSIZ; p = reallocarray(buff, buffsize, sizeof(*buff)); if (p == NULL) goto out; buff = p; dst = buff + used; /* don't increment s here - we want to retry it! */ } else ++s; dst += used; } if (dst >= (buff + buffsize)) { /* sigh */ buffsize += 1; p = reallocarray(buff, buffsize, sizeof(*buff)); if (p == NULL) goto out; buff = p; dst = buff + buffsize - 1; } *dst = 0; return buff; out: free(buff); buffsize = 0; return NULL; } protected int ct_visual_width(wchar_t c) { int t = ct_chr_class(c); int w; 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: w = wcwidth(c); return (w == -1 ? 0 : w); 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 */ } } protected 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; } } protected 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; }