/* * Copyright (c) 2007 The Akuma Project * * 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, 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 * AUTHORS OR 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. * * $Id: istream.c 133 2007-05-29 14:32:04Z asmodai $ */ /* Crown Copyright (c) 1997 This TenDRA(r) Computer Program is subject to Copyright owned by the United Kingdom Secretary of State for Defence acting through the Defence Evaluation and Research Agency (DERA). It is made available to Recipients with a royalty-free licence for its use, reproduction, transfer to other parties and amendment for any purpose not excluding product development provided that any such use et cetera shall be deemed to be acceptance of the following conditions:- (1) Its Recipients shall ensure that this Notice is reproduced upon any copies or amended versions of it; (2) Any amended version of it shall be clearly marked to show both the nature of and the organisation responsible for the relevant amendment or amendments; (3) Its onward transfer from a recipient to another party shall be deemed to be that party's acceptance of these conditions; (4) DERA gives no warranty or assurance as to its quality or suitability for any purpose and DERA accepts no liability whatsoever in relation to any use to which it may be put. */ /**** istream.c --- Input stream handling. * ** Author: Steve Folkes * **** Commentary: * * This file implements the input stream facility specified in the file * "istream.h". See that file for more details. * **** Change Log: * $Log: istream.c,v $ * Revision 1.1.1.1 1998/01/17 15:57:45 release * First version to be checked into rolling release. * * Revision 1.2 1994/12/12 11:45:41 smf * Performing changes for 'CR94_178.sid+tld-update' - bringing in line with * OSSG C Coding Standards. * * Revision 1.1.1.1 1994/07/25 16:06:10 smf * Initial import of os-interface shared files. * **/ /****************************************************************************/ #include "istream.h" #include "cstring.h" #include "syntax.h" /*--------------------------------------------------------------------------*/ #define ISTREAM_BUFSIZE 8193 /*--------------------------------------------------------------------------*/ ExceptionP XX_istream_read_error = EXCEPTION("error reading from stream"); /*--------------------------------------------------------------------------*/ static char istream_input_buffer[ISTREAM_BUFSIZE]; static IStreamT istream_input_1 = { NIL(FILE *), &(istream_input_buffer[0]), &(istream_input_buffer[ISTREAM_BUFSIZE - 1]), &(istream_input_buffer[ISTREAM_BUFSIZE]), &(istream_input_buffer[ISTREAM_BUFSIZE]), 1, "", FALSE }; IStreamT *const istream_input = &istream_input_1; /*--------------------------------------------------------------------------*/ static IStreamStatusT istream_read_hex_char(IStreamP istream, char *c_ref) { int value; int tmp; char c; redo1: switch (c = ISTREAM_READ_CHAR(istream)) { case '\0': ISTREAM_HANDLE_NULL(istream, redo1, eof); return(ISTREAM_STAT_SYNTAX_ERROR); case '\n': istream_inc_line(istream); return(ISTREAM_STAT_SYNTAX_ERROR); default: if (((value = syntax_value(c)) == SYNTAX_NO_VALUE) || (value >= 16)) { return(ISTREAM_STAT_SYNTAX_ERROR); } tmp = value; break; } redo2: switch (c = ISTREAM_READ_CHAR(istream)) { case '\0': ISTREAM_HANDLE_NULL(istream, redo2, eof); return(ISTREAM_STAT_SYNTAX_ERROR); case '\n': istream_inc_line(istream); return(ISTREAM_STAT_SYNTAX_ERROR); default: if (((value = syntax_value(c)) == SYNTAX_NO_VALUE) || (value >= 16)) { return(ISTREAM_STAT_SYNTAX_ERROR); } break; } *c_ref = (char)((tmp * 16) + value); return(ISTREAM_STAT_READ_CHAR); eof: return(ISTREAM_STAT_SYNTAX_ERROR); } /*--------------------------------------------------------------------------*/ void istream_setup(void) { istream_input_1.file = stdin; } #ifdef FS_FAST #undef istream_init #endif /* defined (FS_FAST) */ void istream_init(IStreamP istream) { istream->name = NIL(CStringP); } #ifdef FS_FAST #define istream_init(is) ((is)->name = NIL(CStringP)) #endif /* defined (FS_FAST) */ BoolT istream_open(IStreamP istream, CStringP name) { if ((istream->file = fopen(name, "r")) == NIL(FILE *)) { return(FALSE); } istream->buffer = ALLOCATE_VECTOR(char, ISTREAM_BUFSIZE); istream->limit = &(istream->buffer[ISTREAM_BUFSIZE]); istream->line = 1; istream->name = name; X__istream_fill_buffer(istream); return(TRUE); } void istream_assign(IStreamP to, IStreamP from) { to->file = from->file; to->buffer = from->buffer; to->current = from->current; to->end = from->end; to->limit = from->limit; to->line = from->line; to->name = from->name; to->read_last = from->read_last; } #ifdef FS_FAST #undef istream_is_open #endif /* defined (FS_FAST) */ BoolT istream_is_open(IStreamP istream) { return(istream->name != NIL(CStringP)); } #ifdef FS_FAST #define istream_is_open(is) ((is)->name != NIL(CStringP)) #endif /* defined (FS_FAST) */ BoolT istream_read_char(IStreamP istream, char *c_ref) { char c; redo: switch (c = ISTREAM_READ_CHAR(istream)) { case '\n': istream_inc_line(istream); break; case '\0': ISTREAM_HANDLE_NULL(istream, redo, eof); break; default: break; } *c_ref = c; return(TRUE); eof: return(FALSE); } BoolT istream_peek_char(IStreamP istream, char *c_ref) { char c; redo: switch (c = ISTREAM_PEEK_CHAR(istream)) { case '\0': ISTREAM_HANDLE_NULL(istream, redo, eof); break; default: break; } *c_ref = c; return(TRUE); eof: return(FALSE); } IStreamStatusT istream_read_escaped_char(IStreamP istream, char *c_ref) { char c; redo: switch (c = ISTREAM_READ_CHAR(istream)) { case '\0': ISTREAM_HANDLE_NULL(istream, redo, eof); *c_ref = c; return(ISTREAM_STAT_READ_CHAR); case '\n': istream_inc_line(istream); return(ISTREAM_STAT_NO_CHAR); case '0': *c_ref = '\0'; return(ISTREAM_STAT_READ_CHAR); case 'f': case 'F': *c_ref = '\f'; return(ISTREAM_STAT_READ_CHAR); case 'n': case 'N': *c_ref = '\n'; return(ISTREAM_STAT_READ_CHAR); case 'r': case 'R': *c_ref = '\r'; return(ISTREAM_STAT_READ_CHAR); case 't': case 'T': *c_ref = '\t'; return(ISTREAM_STAT_READ_CHAR); case 'x': case 'X': return(istream_read_hex_char(istream, c_ref)); default: *c_ref = c; return(ISTREAM_STAT_READ_CHAR); } eof: return(ISTREAM_STAT_SYNTAX_ERROR); } #ifdef FS_FAST #undef istream_inc_line #endif /* defined (FS_FAST) */ void istream_inc_line(IStreamP istream) { istream->line++; } #ifdef FS_FAST #define istream_inc_line(is) ((is)->line++) #endif /* defined (FS_FAST) */ #ifdef FS_FAST #undef istream_line #endif /* defined (FS_FAST) */ unsigned istream_line(IStreamP istream) { return(istream->line); } #ifdef FS_FAST #define istream_line(is) ((is)->line) #endif /* defined (FS_FAST) */ #ifdef FS_FAST #undef istream_name #endif /* defined (FS_FAST) */ CStringP istream_name(IStreamP istream) { return(istream->name); } #ifdef FS_FAST #define istream_name(is) ((is)->name) #endif /* defined (FS_FAST) */ void istream_close(IStreamP istream) { (void)fclose(istream->file); if (istream != istream_input) { DEALLOCATE(istream->buffer); } istream_init(istream); } /*--------------------------------------------------------------------------*/ void X__istream_fill_buffer(IStreamP istream) { SizeT bytes = fread((GenericP)(istream->buffer), sizeof(char), (SizeT)(ISTREAM_BUFSIZE - 1), istream->file); if ((bytes == (SizeT)0) && (ferror(istream->file))) { CStringP name = cstring_duplicate(istream->name); THROW_VALUE(XX_istream_read_error, name); UNREACHED; } istream->current = istream->buffer; istream->end = (istream->current + bytes); istream->read_last = FALSE; *(istream->end)++ = '\0'; }