Add missing file.
svn-id: r39300
This commit is contained in:
Lars Skovlund
parent
49393c79e5
commit
9b4f52aefd
1 changed files with 469 additions and 0 deletions
469
engines/sci/engine/stringfrag.cpp
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469
engines/sci/engine/stringfrag.cpp
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/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL: $
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* $Id: $
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*
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*/
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#include "sci/engine/state.h"
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#include "sci/engine/kernel.h"
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namespace Sci {
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#define STRINGFRAG_SEGMENT s->string_frag_segment
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// #define STRINGFRAG_SEGMENT 0xffff
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static int internal_is_valid_stringfrag(EngineState *s, reg_t *buffer)
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{
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if (buffer == NULL)
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return 0;
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while (buffer->offset & 0xff00 != 0 &&
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buffer->offset & 0x00ff != 0)
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{
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if (buffer->segment != STRINGFRAG_SEGMENT)
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return 0;
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buffer++;
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}
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if (buffer->segment != STRINGFRAG_SEGMENT)
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{
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return 0;
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}
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return 1;
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}
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int is_valid_stringfrag(EngineState *s, reg_t pos)
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{
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reg_t *buffer = kernel_dereference_reg_pointer(s, pos, 1);
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return internal_is_valid_stringfrag(s, buffer);
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}
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static int internal_stringfrag_length(EngineState *s, reg_t *buffer)
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{
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int result = 0;
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if (buffer == NULL)
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{
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// SCIkwarn(SCIkERROR, "Error: Invalid stringfrag handle");
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return 0;
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}
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while (buffer->offset & 0xff00 != 0 &&
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buffer->offset & 0x00ff != 0)
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{
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if (buffer->segment != STRINGFRAG_SEGMENT)
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{
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// SCIkwarn(SCIkERROR, "Error: Invalid stringfrag handle");
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return 0;
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}
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result += 2;
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buffer ++;
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}
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if (buffer->segment != STRINGFRAG_SEGMENT)
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{
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SCIkwarn(SCIkERROR, "Error: Invalid stringfrag handle");
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return 0;
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}
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if (buffer->offset & 0xff00 != 0) result++;
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return result;
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}
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int stringfrag_length(EngineState *s, reg_t pos)
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{
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reg_t *buffer = kernel_dereference_reg_pointer(s, pos, 1);
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return internal_stringfrag_length(s, buffer);
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}
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static void internal_stringfrag_to_ascii(EngineState *s, reg_t *buffer)
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{
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int str_length = internal_stringfrag_length(s, buffer);
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char *temp = (char *) malloc(str_length + 1);
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int i = 0;
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while (buffer->offset & 0xff00 != 0 &&
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buffer->offset & 0x00ff != 0)
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{
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temp[i] = (buffer->offset & 0xff00) >> 8;
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if (temp[i] != 0)
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temp[i+1] = buffer->offset & 0xff;
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i += 2;
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buffer++;
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}
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if (buffer->offset & 0xff00 != 0)
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{
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temp[i] = (buffer->offset & 0xff00) >> 8;
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temp[i+1] = 0;
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} else
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{
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temp[i] = 0;
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}
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strcpy((char *) buffer, temp);
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free(temp);
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}
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void stringfrag_to_ascii(EngineState *s, reg_t pos)
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{
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reg_t *buffer = kernel_dereference_reg_pointer(s, pos, 1);
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internal_stringfrag_to_ascii(s, buffer);
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}
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static void internal_ascii_to_stringfrag(EngineState *s, reg_t *buffer)
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{
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int str_length = strlen((char *) buffer);
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int words = str_length % 2 ? (str_length+2)/2 : (str_length + 1)/2;
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char *temp = (char *) malloc(str_length + 1);
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int i;
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strcpy(temp, (char *) buffer);
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for (i = 0; i < words; i++)
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{
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buffer[i].segment = STRINGFRAG_SEGMENT;
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buffer[i].offset = temp[i*2];
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if (temp[i*2])
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buffer[i].offset |= temp[i*2+1];
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}
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free(temp);
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}
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void ascii_to_stringfrag(EngineState *s, reg_t pos)
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{
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reg_t *buffer = kernel_dereference_reg_pointer(s, pos, 1);
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internal_ascii_to_stringfrag(s, buffer);
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}
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static void internal_stringfrag_append_char(EngineState *s, reg_t *buffer, unsigned char c)
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{
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while (buffer->offset & 0xff00 != 0 &&
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buffer->offset & 0x00ff != 0)
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buffer++;
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if (buffer->offset & 0xff00 == 0)
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{
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buffer->offset = c << 8;
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} else
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if (buffer->offset & 0x00ff == 0)
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{
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buffer->offset |= c;
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buffer++;
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buffer->segment = STRINGFRAG_SEGMENT;
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buffer->offset = 0;
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}
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}
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void stringfrag_append_char(EngineState *s, reg_t pos, unsigned char c)
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{
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reg_t *buffer = kernel_dereference_reg_pointer(s, pos, 1);
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internal_stringfrag_append_char(s, buffer, c);
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}
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inline void stringfrag_setchar(reg_t *buffer, int pos, int offset, unsigned char c)
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{
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switch (offset)
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{
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case 0 :
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buffer[pos].offset = (buffer[pos].offset & 0x00ff) | (c << 8);
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break;
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case 1 :
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buffer[pos].offset = (buffer[pos].offset & 0xff00) | c;
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break;
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}
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}
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inline unsigned char stringfrag_getchar(reg_t *buffer, int pos, int offset)
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{
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switch (offset)
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{
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case 0 :
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return buffer[pos].offset >> 8;
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case 1 :
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return buffer[pos].offset & 0xff;
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}
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}
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void stringfrag_memmove(EngineState *s, reg_t *buffer, int sourcepos, int destpos, int count)
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{
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/* Some of these values are not used yet. There are a couple
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of cases that we could implement faster if the need arises, in
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which case we would most certainly need these. */
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int source_begin_pos = sourcepos/2;
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int source_begin_offset = sourcepos%2;
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int source_end_pos = (sourcepos+count-1)/2;
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int source_end_offset = (sourcepos+count-1)%2;
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int dest_begin_pos = destpos/2;
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int dest_begin_offset = destpos%2;
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int dest_end_pos = (destpos+count-1)/2;
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int dest_end_offset = (destpos+count-1)%2;
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if (sourcepos < destpos)
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{
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int n;
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for (n = count-1; n >= 0; n--)
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{
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buffer[dest_end_pos].segment = STRINGFRAG_SEGMENT;
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stringfrag_setchar(buffer, dest_end_pos, dest_end_offset,
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stringfrag_getchar(buffer, source_end_pos, source_end_offset));
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if (source_end_offset ^= 1)
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source_end_pos --;
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if (dest_end_offset ^= 1)
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dest_end_pos --;
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}
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} else
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{
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int n;
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for (n = 0; n < count; n++)
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{
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buffer[dest_begin_pos].segment = STRINGFRAG_SEGMENT;
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stringfrag_setchar(buffer, dest_begin_pos, dest_begin_offset,
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stringfrag_getchar(buffer, source_begin_pos, source_begin_offset));
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if (!(source_begin_offset ^= 1))
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source_begin_pos ++;
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if (!(dest_begin_offset ^= 1))
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dest_begin_pos ++;
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}
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}
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}
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static void internal_stringfrag_insert_char(EngineState *s, reg_t *buffer, int p, unsigned char c)
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{
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reg_t *save = buffer + p/2;
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reg_t *seeker = buffer + p/2;
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int restore_nul_offset;
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int restore_nul_pos;
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int len = internal_stringfrag_length(s, buffer);
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while (seeker->offset & 0xff00 != 0 &&
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seeker->offset & 0x00ff != 0)
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seeker++;
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/* The variables restore_null_offset and restore_null_pos will
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indicate where the NUL character should be PUT BACK after
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inserting c, as this operation might overwrite the NUL. */
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if (seeker->offset & 0xff00)
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{
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restore_nul_offset = 1;
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restore_nul_pos = 0;
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}
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else
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{
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restore_nul_offset = 0;
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restore_nul_pos = 1;
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}
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if (seeker-save == 0) // So p is at the end, use fast method
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{
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internal_stringfrag_append_char(s, seeker, c);
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return;
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}
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stringfrag_memmove(s, buffer, p, p+1, len-p);
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stringfrag_setchar(buffer, p/2, p%2, c);
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stringfrag_setchar(seeker, restore_nul_pos, restore_nul_offset, 0);
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}
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void stringfrag_insert_char(EngineState *s, reg_t pos, int p, unsigned char c)
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{
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reg_t *buffer = kernel_dereference_reg_pointer(s, pos, 1);
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internal_stringfrag_insert_char(s, buffer, p, c);
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}
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static void internal_stringfrag_delete_char(EngineState *s, reg_t *buffer, int p)
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{
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reg_t *save = buffer + p;
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reg_t *seeker = buffer + p;
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int restore_nul_offset;
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int restore_nul_pos;
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int len = internal_stringfrag_length(s, buffer);
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while (seeker->offset & 0xff00 != 0 &&
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seeker->offset & 0x00ff != 0)
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seeker++;
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/* The variables restore_null_offset and restore_null_pos will
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indicate where the NUL character should be PUT BACK after
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deletion, as this operation might overwrite the NUL. */
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if (seeker->offset & 0xff00)
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{
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restore_nul_offset = 1;
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restore_nul_pos = -1;
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}
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else
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{
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restore_nul_offset = 0;
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restore_nul_pos = 0;
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}
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stringfrag_memmove(s, buffer, p, p-1, len-p);
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stringfrag_setchar(seeker, restore_nul_pos, restore_nul_offset, 0);
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}
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void stringfrag_delete_char(EngineState *s, reg_t pos, int p)
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{
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reg_t *buffer = kernel_dereference_reg_pointer(s, pos, 1);
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internal_stringfrag_delete_char(s, buffer, p);
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}
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void internal_stringfrag_strcpy(EngineState *s, reg_t *dest, reg_t *src)
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{
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while (src->offset & 0xff00 != 0 &&
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src->offset & 0x00ff != 0)
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{
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*dest = *src;
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dest++;
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src++;
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}
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*dest = *src;
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}
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void stringfrag_strcpy(EngineState *s, reg_t dest, reg_t src)
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{
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reg_t *destbuf = kernel_dereference_reg_pointer(s, dest, 1);
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reg_t *srcbuf = kernel_dereference_reg_pointer(s, src, 1);
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internal_stringfrag_strcpy(s, destbuf, srcbuf);
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}
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void internal_stringfrag_strncpy(EngineState *s, reg_t *dest, reg_t *src, int len)
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{
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while (src->offset & 0xff00 != 0 &&
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src->offset & 0x00ff != 0 &&
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(len -= 2) > 1)
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{
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*dest = *src;
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dest++;
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src++;
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}
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for ( ; len > 1 ; len -= 2)
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{
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dest->segment = STRINGFRAG_SEGMENT;
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dest->offset = 0;
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len -= 2;
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}
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if (len == 1)
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stringfrag_setchar(dest, 0, 0, 0);
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*dest = *src;
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}
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void stringfrag_strncpy(EngineState *s, reg_t dest, reg_t src, int len)
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{
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reg_t *destbuf = kernel_dereference_reg_pointer(s, dest, 1);
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reg_t *srcbuf = kernel_dereference_reg_pointer(s, src, 1);
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internal_stringfrag_strncpy(s, destbuf, srcbuf, len);
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}
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int internal_stringfrag_strcmp(EngineState *s, reg_t *s1, reg_t *s2)
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{
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while (1)
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{
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if (s1->offset & 0xff00 == 0 && s2->offset & 0xff00 == 0)
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return 0;
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if (s1->offset & 0xff00 == 0)
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return -1;
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if (s2->offset & 0xff00 == 0)
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return 1;
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if (s1->offset & 0xff00 < s2->offset & 0xff00)
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return -1;
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if (s1->offset & 0xff00 > s2->offset & 0xff00)
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return 1;
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if (s1->offset & 0x00ff == 0 && s2->offset & 0x00ff == 0)
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return 0;
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if (s1->offset & 0x00ff == 0)
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return -1;
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if (s2->offset & 0x00ff == 0)
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return 1;
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if (s1->offset & 0x00ff < s2->offset & 0x00ff)
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return -1;
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if (s1->offset & 0x00ff > s2->offset & 0x00ff)
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return 1;
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}
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return 0;
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}
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void stringfrag_strcmp(EngineState *s, reg_t s1, reg_t s2)
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{
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reg_t *s1buf = kernel_dereference_reg_pointer(s, s1, 1);
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reg_t *s2buf = kernel_dereference_reg_pointer(s, s2, 1);
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internal_stringfrag_strcmp(s, s1buf, s2buf);
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}
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int internal_stringfrag_strncmp(EngineState *s, reg_t *s1, reg_t *s2, int len)
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{
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while (len)
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{
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if (len--) return 0;
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if (s1->offset & 0xff00 == 0 && s2->offset & 0xff00 == 0)
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return 0;
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if (s1->offset & 0xff00 == 0)
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return -1;
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if (s2->offset & 0xff00 == 0)
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return 1;
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if (s1->offset & 0xff00 < s2->offset & 0xff00)
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return -1;
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if (s1->offset & 0xff00 > s2->offset & 0xff00)
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return 1;
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if (len--) return 0;
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if (s1->offset & 0x00ff == 0 && s2->offset & 0x00ff == 0)
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return 0;
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if (s1->offset & 0x00ff == 0)
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return -1;
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if (s2->offset & 0x00ff == 0)
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return 1;
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if (s1->offset & 0x00ff < s2->offset & 0x00ff)
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return -1;
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if (s1->offset & 0x00ff > s2->offset & 0x00ff)
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return 1;
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}
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return 0;
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}
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void stringfrag_strncmp(EngineState *s, reg_t s1, reg_t s2, int len)
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{
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reg_t *s1buf = kernel_dereference_reg_pointer(s, s1, 1);
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reg_t *s2buf = kernel_dereference_reg_pointer(s, s2, 1);
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internal_stringfrag_strncmp(s, s1buf, s2buf, len);
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}
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}
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