| /**************************************************************************** |
| * Copyright (c) 1998-2003,2004 Free Software Foundation, Inc. * |
| * * |
| * Permission is hereby granted, free of charge, to any person obtaining a * |
| * copy of this software and associated documentation files (the * |
| * "Software"), to deal in the Software without restriction, including * |
| * without limitation the rights to use, copy, modify, merge, publish, * |
| * distribute, distribute with modifications, sublicense, and/or sell * |
| * copies of the Software, and to permit persons to whom the Software is * |
| * furnished to do so, subject to the following conditions: * |
| * * |
| * The above copyright notice and this permission notice shall be included * |
| * in all copies or substantial portions of the Software. * |
| * * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * |
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * |
| * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * |
| * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * |
| * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * |
| * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * |
| * * |
| * Except as contained in this notice, the name(s) of the above copyright * |
| * holders shall not be used in advertising or otherwise to promote the * |
| * sale, use or other dealings in this Software without prior written * |
| * authorization. * |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * State-machine fallback written by Thomas E. Dickey 2002 * |
| ****************************************************************************/ |
| |
| /* |
| * This function is needed to support vwscanw |
| */ |
| |
| #include <curses.priv.h> |
| |
| #if !HAVE_VSSCANF |
| |
| MODULE_ID("$Id: vsscanf.c,v 1.18 2004/04/03 20:27:02 tom Exp $") |
| |
| #if !(HAVE_VFSCANF || HAVE__DOSCAN) |
| |
| #include <ctype.h> |
| |
| #define L_SQUARE '[' |
| #define R_SQUARE ']' |
| |
| typedef enum { |
| cUnknown |
| ,cError /* anything that isn't ANSI */ |
| ,cAssigned |
| ,cChar |
| ,cInt |
| ,cFloat |
| ,cDouble |
| ,cPointer |
| ,cLong |
| ,cShort |
| ,cRange |
| ,cString |
| } ChunkType; |
| |
| typedef enum { |
| oUnknown |
| ,oShort |
| ,oLong |
| } OtherType; |
| |
| typedef enum { |
| sUnknown |
| ,sPercent /* last was '%' beginning a format */ |
| ,sNormal /* ...somewhere in the middle */ |
| ,sLeft /* last was left square bracket beginning a range */ |
| ,sRange /* ...somewhere in the middle */ |
| ,sFinal /* last finished a format */ |
| } ScanState; |
| |
| static ChunkType |
| final_ch(int ch, OtherType other) |
| { |
| ChunkType result = cUnknown; |
| |
| switch (ch) { |
| case 'c': |
| if (other == oUnknown) |
| result = cChar; |
| else |
| result = cError; |
| break; |
| case 'd': |
| case 'i': |
| case 'X': |
| case 'x': |
| switch (other) { |
| case oUnknown: |
| result = cInt; |
| break; |
| case oShort: |
| result = cShort; |
| break; |
| case oLong: |
| result = cLong; |
| break; |
| } |
| break; |
| case 'E': |
| case 'e': |
| case 'f': |
| case 'g': |
| switch (other) { |
| case oUnknown: |
| result = cFloat; |
| break; |
| case oShort: |
| result = cError; |
| break; |
| case oLong: |
| result = cDouble; |
| break; |
| } |
| break; |
| case 'n': |
| if (other == oUnknown) |
| result = cAssigned; |
| else |
| result = cError; |
| break; |
| case 'p': |
| if (other == oUnknown) |
| result = cPointer; |
| else |
| result = cError; |
| break; |
| case 's': |
| if (other == oUnknown) |
| result = cString; |
| else |
| result = cError; |
| break; |
| } |
| return result; |
| } |
| |
| static OtherType |
| other_ch(int ch) |
| { |
| OtherType result = oUnknown; |
| switch (ch) { |
| case 'h': |
| result = oShort; |
| break; |
| case 'l': |
| result = oLong; |
| break; |
| } |
| return result; |
| } |
| #endif |
| |
| /*VARARGS2*/ |
| NCURSES_EXPORT(int) |
| vsscanf(const char *str, const char *format, va_list ap) |
| { |
| #if HAVE_VFSCANF || HAVE__DOSCAN |
| /* |
| * This code should work on anything descended from AT&T SVr1. |
| */ |
| FILE strbuf; |
| |
| strbuf._flag = _IOREAD; |
| strbuf._ptr = strbuf._base = (unsigned char *) str; |
| strbuf._cnt = strlen(str); |
| strbuf._file = _NFILE; |
| |
| #if HAVE_VFSCANF |
| return (vfscanf(&strbuf, format, ap)); |
| #else |
| return (_doscan(&strbuf, format, ap)); |
| #endif |
| #else |
| static int can_convert = -1; |
| |
| int assigned = 0; |
| int consumed = 0; |
| |
| T((T_CALLED("vsscanf(%s,%s,...)"), |
| _nc_visbuf2(1, str), |
| _nc_visbuf2(2, format))); |
| |
| /* |
| * This relies on having a working "%n" format conversion. Check if it |
| * works. Only very old C libraries do not support it. |
| * |
| * FIXME: move this check into the configure script. |
| */ |
| if (can_convert < 0) { |
| int check1; |
| int check2; |
| if (sscanf("123", "%d%n", &check1, &check2) > 0 |
| && check1 == 123 |
| && check2 == 3) { |
| can_convert = 1; |
| } else { |
| can_convert = 0; |
| } |
| } |
| |
| if (can_convert) { |
| size_t len_fmt = strlen(format) + 32; |
| char *my_fmt = malloc(len_fmt); |
| ChunkType chunk, ctest; |
| OtherType other, otest; |
| ScanState state; |
| unsigned n; |
| int eaten; |
| void *pointer; |
| |
| if (my_fmt != 0) { |
| /* |
| * Split the original format into chunks, adding a "%n" to the end |
| * of each (except of course if it used %n), and use that |
| * information to decide where to start scanning the next chunk. |
| * |
| * FIXME: does %n count bytes or characters? If the latter, this |
| * will require further work for multibyte strings. |
| */ |
| while (*format != '\0') { |
| /* find a chunk */ |
| state = sUnknown; |
| chunk = cUnknown; |
| other = oUnknown; |
| pointer = 0; |
| for (n = 0; format[n] != 0 && state != sFinal; ++n) { |
| my_fmt[n] = format[n]; |
| switch (state) { |
| case sUnknown: |
| if (format[n] == '%') |
| state = sPercent; |
| break; |
| case sPercent: |
| if (format[n] == '%') { |
| state = sUnknown; |
| } else if (format[n] == L_SQUARE) { |
| state = sLeft; |
| } else { |
| state = sNormal; |
| --n; |
| } |
| break; |
| case sLeft: |
| state = sRange; |
| if (format[n] == '^') { |
| ++n; |
| my_fmt[n] = format[n]; |
| } |
| break; |
| case sRange: |
| if (format[n] == R_SQUARE) { |
| state = sFinal; |
| chunk = cRange; |
| } |
| break; |
| case sNormal: |
| if (format[n] == '*') { |
| state = sUnknown; |
| } else { |
| if ((ctest = final_ch(format[n], other)) != cUnknown) { |
| state = sFinal; |
| chunk = ctest; |
| } else if ((otest = other_ch(format[n])) != oUnknown) { |
| other = otest; |
| } else if (isalpha(UChar(format[n]))) { |
| state = sFinal; |
| chunk = cError; |
| } |
| } |
| break; |
| case sFinal: |
| break; |
| } |
| } |
| my_fmt[n] = '\0'; |
| format += n; |
| |
| if (chunk == cUnknown |
| || chunk == cError) { |
| if (assigned == 0) |
| assigned = EOF; |
| break; |
| } |
| |
| /* add %n, if the format was not that */ |
| if (chunk != cAssigned) { |
| strcat(my_fmt, "%n"); |
| } |
| |
| switch (chunk) { |
| case cAssigned: |
| strcat(my_fmt, "%n"); |
| pointer = &eaten; |
| break; |
| case cInt: |
| pointer = va_arg(ap, int *); |
| break; |
| case cShort: |
| pointer = va_arg(ap, short *); |
| break; |
| case cFloat: |
| pointer = va_arg(ap, float *); |
| break; |
| case cDouble: |
| pointer = va_arg(ap, double *); |
| break; |
| case cLong: |
| pointer = va_arg(ap, long *); |
| break; |
| case cPointer: |
| pointer = va_arg(ap, void *); |
| break; |
| case cChar: |
| case cRange: |
| case cString: |
| pointer = va_arg(ap, char *); |
| break; |
| case cError: |
| case cUnknown: |
| break; |
| } |
| /* do the conversion */ |
| T(("...converting chunk #%d type %d(%s,%s)", |
| assigned + 1, chunk, |
| _nc_visbuf2(1, str + consumed), |
| _nc_visbuf2(2, my_fmt))); |
| if (sscanf(str + consumed, my_fmt, pointer, &eaten) > 0) |
| consumed += eaten; |
| else |
| break; |
| ++assigned; |
| } |
| free(my_fmt); |
| } |
| } |
| returnCode(assigned); |
| #endif |
| } |
| #else |
| extern |
| NCURSES_EXPORT(void) |
| _nc_vsscanf(void); /* quiet's gcc warning */ |
| NCURSES_EXPORT(void) |
| _nc_vsscanf(void) |
| { |
| } /* nonempty for strict ANSI compilers */ |
| #endif /* !HAVE_VSSCANF */ |
