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Add ncurses 6.4
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Justine Tunney
parent
6ee5580adc
commit
0ed7309fdb
3071 changed files with 69379 additions and 1 deletions
357
third_party/ncurses/vsscanf.c
vendored
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357
third_party/ncurses/vsscanf.c
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/****************************************************************************
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* Copyright 2020 Thomas E. Dickey *
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* Copyright 1998-2004,2012 Free Software Foundation, Inc. *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* copy of this software and associated documentation files (the *
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* "Software"), to deal in the Software without restriction, including *
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* without limitation the rights to use, copy, modify, merge, publish, *
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* distribute, distribute with modifications, sublicense, and/or sell *
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* copies of the Software, and to permit persons to whom the Software is *
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* furnished to do so, subject to the following conditions: *
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* *
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* The above copyright notice and this permission notice shall be included *
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* in all copies or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
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* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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* *
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* Except as contained in this notice, the name(s) of the above copyright *
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* holders shall not be used in advertising or otherwise to promote the *
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* sale, use or other dealings in this Software without prior written *
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* authorization. *
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****************************************************************************/
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/****************************************************************************
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* State-machine fallback written by Thomas E. Dickey 2002 *
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****************************************************************************/
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/*
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* This function is needed to support vwscanw
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*/
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#include "curses.priv.h"
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#if !HAVE_VSSCANF
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MODULE_ID("$Id: vsscanf.c,v 1.21 2020/02/02 23:34:34 tom Exp $")
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#if !(HAVE_VFSCANF || HAVE__DOSCAN)
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#include <ctype.h>
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#define L_SQUARE '['
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#define R_SQUARE ']'
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typedef enum {
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cUnknown
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,cError /* anything that isn't ANSI */
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,cAssigned
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,cChar
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,cInt
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,cFloat
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,cDouble
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,cPointer
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,cLong
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,cShort
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,cRange
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,cString
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} ChunkType;
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typedef enum {
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oUnknown
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,oShort
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,oLong
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} OtherType;
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typedef enum {
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sUnknown
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,sPercent /* last was '%' beginning a format */
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,sNormal /* ...somewhere in the middle */
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,sLeft /* last was left square bracket beginning a range */
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,sRange /* ...somewhere in the middle */
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,sFinal /* last finished a format */
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} ScanState;
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static ChunkType
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final_ch(int ch, OtherType other)
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{
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ChunkType result = cUnknown;
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switch (ch) {
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case 'c':
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if (other == oUnknown)
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result = cChar;
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else
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result = cError;
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break;
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case 'd':
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case 'i':
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case 'X':
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case 'x':
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switch (other) {
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case oUnknown:
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result = cInt;
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break;
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case oShort:
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result = cShort;
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break;
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case oLong:
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result = cLong;
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break;
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}
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break;
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case 'E':
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case 'e':
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case 'f':
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case 'g':
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switch (other) {
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case oUnknown:
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result = cFloat;
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break;
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case oShort:
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result = cError;
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break;
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case oLong:
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result = cDouble;
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break;
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}
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break;
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case 'n':
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if (other == oUnknown)
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result = cAssigned;
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else
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result = cError;
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break;
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case 'p':
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if (other == oUnknown)
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result = cPointer;
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else
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result = cError;
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break;
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case 's':
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if (other == oUnknown)
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result = cString;
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else
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result = cError;
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break;
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}
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return result;
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}
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static OtherType
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other_ch(int ch)
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{
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OtherType result = oUnknown;
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switch (ch) {
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case 'h':
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result = oShort;
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break;
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case 'l':
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result = oLong;
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break;
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}
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return result;
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}
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#endif
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/*VARARGS2*/
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NCURSES_EXPORT(int)
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vsscanf(const char *str, const char *format, va_list ap)
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{
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#if HAVE_VFSCANF || HAVE__DOSCAN
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/*
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* This code should work on anything descended from AT&T SVr1.
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*/
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FILE strbuf;
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strbuf._flag = _IOREAD;
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strbuf._ptr = strbuf._base = (unsigned char *) str;
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strbuf._cnt = strlen(str);
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strbuf._file = _NFILE;
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#if HAVE_VFSCANF
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return (vfscanf(&strbuf, format, ap));
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#else
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return (_doscan(&strbuf, format, ap));
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#endif
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#else
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static int can_convert = -1;
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int assigned = 0;
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int consumed = 0;
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T((T_CALLED("vsscanf(%s,%s,...)"),
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_nc_visbuf2(1, str),
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_nc_visbuf2(2, format)));
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/*
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* This relies on having a working "%n" format conversion. Check if it
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* works. Only very old C libraries do not support it.
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*
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* FIXME: move this check into the configure script.
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*/
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if (can_convert < 0) {
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int check1;
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int check2;
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if (sscanf("123", "%d%n", &check1, &check2) > 0
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&& check1 == 123
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&& check2 == 3) {
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can_convert = 1;
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} else {
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can_convert = 0;
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}
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}
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if (can_convert) {
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size_t len_fmt = strlen(format) + 32;
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char *my_fmt = malloc(len_fmt);
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ChunkType chunk, ctest;
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OtherType other, otest;
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ScanState state;
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unsigned n;
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int eaten;
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void *pointer;
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if (my_fmt != 0) {
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/*
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* Split the original format into chunks, adding a "%n" to the end
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* of each (except of course if it used %n), and use that
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* information to decide where to start scanning the next chunk.
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*
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* FIXME: does %n count bytes or characters? If the latter, this
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* will require further work for multibyte strings.
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*/
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while (*format != '\0') {
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/* find a chunk */
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state = sUnknown;
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chunk = cUnknown;
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other = oUnknown;
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pointer = 0;
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for (n = 0; format[n] != 0 && state != sFinal; ++n) {
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my_fmt[n] = format[n];
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switch (state) {
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case sUnknown:
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if (format[n] == '%')
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state = sPercent;
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break;
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case sPercent:
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if (format[n] == '%') {
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state = sUnknown;
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} else if (format[n] == L_SQUARE) {
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state = sLeft;
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} else {
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state = sNormal;
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--n;
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}
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break;
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case sLeft:
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state = sRange;
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if (format[n] == '^') {
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++n;
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my_fmt[n] = format[n];
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}
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break;
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case sRange:
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if (format[n] == R_SQUARE) {
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state = sFinal;
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chunk = cRange;
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}
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break;
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case sNormal:
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if (format[n] == '*') {
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state = sUnknown;
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} else {
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if ((ctest = final_ch(format[n], other)) != cUnknown) {
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state = sFinal;
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chunk = ctest;
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} else if ((otest = other_ch(format[n])) != oUnknown) {
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other = otest;
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} else if (isalpha(UChar(format[n]))) {
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state = sFinal;
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chunk = cError;
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}
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}
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break;
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case sFinal:
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break;
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}
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}
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my_fmt[n] = '\0';
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format += n;
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if (chunk == cUnknown
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|| chunk == cError) {
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if (assigned == 0)
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assigned = EOF;
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break;
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}
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/* add %n, if the format was not that */
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if (chunk != cAssigned) {
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_nc_STRCAT(my_fmt, "%n", len_fmt);
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}
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switch (chunk) {
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case cAssigned:
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_nc_STRCAT(my_fmt, "%n", len_fmt);
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pointer = &eaten;
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break;
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case cInt:
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pointer = va_arg(ap, int *);
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break;
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case cShort:
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pointer = va_arg(ap, short *);
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break;
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case cFloat:
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pointer = va_arg(ap, float *);
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break;
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case cDouble:
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pointer = va_arg(ap, double *);
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break;
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case cLong:
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pointer = va_arg(ap, long *);
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break;
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case cPointer:
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pointer = va_arg(ap, void *);
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break;
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case cChar:
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case cRange:
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case cString:
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pointer = va_arg(ap, char *);
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break;
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case cError:
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case cUnknown:
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break;
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}
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/* do the conversion */
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T(("...converting chunk #%d type %d(%s,%s)",
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assigned + 1, chunk,
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_nc_visbuf2(1, str + consumed),
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_nc_visbuf2(2, my_fmt)));
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if (sscanf(str + consumed, my_fmt, pointer, &eaten) > 0)
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consumed += eaten;
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else
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break;
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++assigned;
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}
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free(my_fmt);
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}
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}
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returnCode(assigned);
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#endif
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}
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#else
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extern
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NCURSES_EXPORT(void)
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_nc_vsscanf(void); /* quiet's gcc warning */
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NCURSES_EXPORT(void)
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_nc_vsscanf(void)
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{
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} /* nonempty for strict ANSI compilers */
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#endif /* !HAVE_VSSCANF */
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