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/* |
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parse_simple.c - Part of psiconv, a PSION 5 file formats converter |
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Copyright (c) 1999, 2000 Frodo Looijaard <frodol@dds.nl> |
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|
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
| 8 |
(at your option) any later version. |
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|
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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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|
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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., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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|
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#include "config.h" |
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#include "compat.h" |
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|
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#include <stdlib.h> |
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#include <math.h> |
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|
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#include "parse_routines.h" |
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#include "error.h" |
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|
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#ifdef DMALLOC |
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#include <dmalloc.h> |
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#endif |
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|
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static psiconv_float_t pow2(int n); |
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static psiconv_string_t psiconv_read_string_aux(const psiconv_config config, |
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const psiconv_buffer buf,int lev, |
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psiconv_u32 off,int *length, int *status, |
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int kind); |
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|
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/* Very inefficient, but good enough for now. By implementing it ourselves, |
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we do not have to link with -lm */ |
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psiconv_float_t pow2(int n) |
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{ |
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psiconv_float_t res=1.0; |
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int i; |
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|
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for (i = 0; i < (n<0?-n:n); i++) |
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res *= 2.0; |
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|
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return n<0?1/res:res; |
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} |
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psiconv_u8 psiconv_read_u8(const psiconv_config config,const psiconv_buffer buf,int lev,psiconv_u32 off, |
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int *status) |
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{ |
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psiconv_u8 *ptr; |
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ptr = psiconv_buffer_get(buf,off); |
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if (!ptr) { |
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psiconv_warn(config,lev,off,"Trying byte read past the end of the file"); |
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if (status) |
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*status = -PSICONV_E_PARSE; |
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return 0; |
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} |
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if (status) |
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*status = 0; |
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return *ptr; |
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} |
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|
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psiconv_u16 psiconv_read_u16(const psiconv_config config,const psiconv_buffer buf,int lev,psiconv_u32 off, |
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int *status) |
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{ |
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psiconv_u8 *ptr0,*ptr1; |
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ptr0 = psiconv_buffer_get(buf,off); |
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ptr1 = psiconv_buffer_get(buf,off+1); |
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if (!ptr0 || !ptr1) { |
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psiconv_warn(config,lev,off,"Trying word read past the end of the file"); |
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if (status) |
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*status = -PSICONV_E_PARSE; |
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return 0; |
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} |
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if (status) |
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*status = 0; |
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return *ptr0 + (*ptr1 << 8); |
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} |
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|
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psiconv_u32 psiconv_read_u32(const psiconv_config config,const psiconv_buffer buf,int lev,psiconv_u32 off, |
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int *status) |
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{ |
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psiconv_u8 *ptr0,*ptr1,*ptr2,*ptr3; |
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ptr0 = psiconv_buffer_get(buf,off); |
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ptr1 = psiconv_buffer_get(buf,off+1); |
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ptr2 = psiconv_buffer_get(buf,off+2); |
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ptr3 = psiconv_buffer_get(buf,off+3); |
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if (!ptr0 || !ptr1 || !ptr2 || !ptr3) { |
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psiconv_warn(config,lev,off,"Trying long read past the end of the file"); |
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if (status) |
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*status = -PSICONV_E_PARSE; |
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return 0; |
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} |
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if (status) |
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*status = 0; |
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return *ptr0 + (*ptr1 << 8) + (*ptr2 << 16) + (*ptr3 << 24); |
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} |
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|
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psiconv_s32 psiconv_read_sint(const psiconv_config config,const psiconv_buffer buf,int lev,psiconv_u32 off, |
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int *length,int *status) |
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{ |
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int localstatus; |
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psiconv_u32 temp; |
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|
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temp=psiconv_read_u32(config,buf,lev,off,&localstatus); |
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if (status) |
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*status = localstatus; |
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if (length) |
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*length = localstatus?0:4; |
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|
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return localstatus?0:(temp & 0x7fffffff)*(temp&0x80000000?-1:1); |
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} |
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|
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psiconv_S_t psiconv_read_S(const psiconv_config config,const psiconv_buffer buf, int lev, psiconv_u32 off, |
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int *length,int *status) |
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{ |
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psiconv_u8 temp; |
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psiconv_S_t res; |
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int len,localstatus; |
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|
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psiconv_progress(config,lev+1,off,"Going to read a S length indicator"); |
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temp = psiconv_read_u8(config,buf,lev+2,off,&localstatus); |
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if (localstatus) |
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goto ERROR; |
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if ((temp & 0x03) == 0x02) { |
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res = psiconv_read_u8(config,buf,lev+2,off,&localstatus) >> 2; |
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if (localstatus) |
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goto ERROR; |
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len = 1; |
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psiconv_debug(config,lev+2,off,"Indicator (1 byte): %02x",res); |
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} else if ((temp & 0x07) == 0x05) { |
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res = psiconv_read_u16(config,buf,lev+2,off,&localstatus) >> 3; |
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if (localstatus) |
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goto ERROR; |
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len = 2; |
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psiconv_debug(config,lev+2,off,"Indicator (2 bytes): %04x",res); |
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} else { |
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psiconv_warn(config,lev+2,off,"S indicator: unknown encoding!"); |
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psiconv_debug(config,lev+2,off,"Raw data first byte: %02x",temp); |
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goto ERROR; |
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} |
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|
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if (length) |
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*length = len; |
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if (status) |
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*status = 0; |
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|
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psiconv_progress(config,lev+1,off+len-1, |
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"End of S length indicator (total length: %08x)", len); |
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|
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return res; |
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|
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ERROR: |
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psiconv_warn(config,lev+1,off,"Reading of S indicator failed"); |
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if (status) |
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*status = localstatus; |
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if (length) |
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*length = 0; |
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return 0; |
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} |
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|
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psiconv_X_t psiconv_read_X(const psiconv_config config,const psiconv_buffer buf, int lev, psiconv_u32 off, |
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int *length, int *status) |
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{ |
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psiconv_u8 temp; |
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psiconv_X_t res; |
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int len,localstatus; |
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|
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psiconv_progress(config,lev+1,off,"Going to read a X length indicator"); |
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temp = psiconv_read_u8(config,buf,lev+2,off,&localstatus); |
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if (localstatus) |
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goto ERROR; |
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if ((temp & 0x01) == 0x00) { |
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res = psiconv_read_u8(config,buf,lev+2,off,&localstatus) >> 1; |
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if (localstatus) |
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goto ERROR; |
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len = 1; |
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psiconv_debug(config,lev+2,off,"Indicator (1 byte): %02x",res); |
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} else if ((temp & 0x03) == 0x01) { |
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res = psiconv_read_u16(config,buf,lev+2,off,&localstatus) >> 2; |
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if (localstatus) |
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goto ERROR; |
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len = 2; |
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psiconv_debug(config,lev+2,off,"Indicator (2 bytes): %04x",res); |
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} else if ((temp & 0x07) == 0x03) { |
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res = psiconv_read_u32(config,buf,lev+2,off,&localstatus) >> 3; |
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if (localstatus) |
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goto ERROR; |
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len = 4; |
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psiconv_debug(config,lev+2,off,"Indicator (4 bytes): %08x",res); |
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} else { |
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psiconv_warn(config,lev+2,off,"X indicator: unknown encoding!"); |
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psiconv_debug(config,lev+2,off,"Raw data first byte: %02x",temp); |
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goto ERROR; |
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} |
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|
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if (length) |
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*length = len; |
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if (status) |
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*status = 0; |
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|
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psiconv_progress(config,lev+1,off+len-1, |
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"End of X length indicator (total length: %08x)", len); |
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|
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return res; |
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|
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ERROR: |
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psiconv_warn(config,lev+1,off,"Reading of X indicator failed"); |
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if (status) |
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*status = localstatus; |
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if (length) |
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*length = 0; |
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return 0; |
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} |
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|
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psiconv_length_t psiconv_read_length(const psiconv_config config,const psiconv_buffer buf, int lev, |
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psiconv_u32 off, int *length, int *status) |
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{ |
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psiconv_length_t res; |
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int localstatus; |
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|
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res = (2.54/1440.0) * ((psiconv_s32) psiconv_read_u32(config,buf,lev,off, |
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&localstatus)); |
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if (localstatus) { |
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psiconv_warn(config,lev+1,off,"Reading of length failed"); |
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if (length) |
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*length = 0; |
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if (status) |
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*status = localstatus; |
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return 0; |
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} |
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psiconv_debug(config,lev+1,off,"Length: %f",res); |
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if (length) |
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*length = 4; |
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if (status) |
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*status = 0; |
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return res; |
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} |
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|
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psiconv_size_t psiconv_read_size(const psiconv_config config,const psiconv_buffer buf, int lev, |
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psiconv_u32 off, int *length, int *status) |
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{ |
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psiconv_size_t res; |
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int localstatus; |
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res = ((psiconv_s32) psiconv_read_u32(config,buf,lev,off,&localstatus)) / 20.0; |
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if (localstatus) { |
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psiconv_warn(config,lev+1,off,"Reading of size failed"); |
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if (length) |
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*length = 0; |
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if (status) |
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*status = localstatus; |
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return 0; |
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} |
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psiconv_debug(config,lev+1,off,"Size: %f",res); |
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if (status) |
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*status = 0; |
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if (length) |
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*length = 4; |
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return res; |
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} |
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|
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int psiconv_parse_bool(const psiconv_config config,const psiconv_buffer buf, int lev, psiconv_u32 off, |
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int *length, psiconv_bool_t *result) |
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{ |
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psiconv_u8 temp; |
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int localstatus; |
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temp = psiconv_read_u8(config,buf,lev,off,&localstatus); |
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if (localstatus) { |
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psiconv_warn(config,lev+1,off,"Reading of bool failed"); |
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if (length) |
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*length = 0; |
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return localstatus; |
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} |
| 278 |
if (length) |
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*length = 1; |
| 280 |
if (temp == 0) { |
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*result = psiconv_bool_false; |
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return 0; |
| 283 |
} else if (temp == 1) { |
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*result = psiconv_bool_true; |
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return 0; |
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} |
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psiconv_warn(config,lev+1,off,"Unknown value for boolean"); |
| 288 |
psiconv_debug(config,lev+1,off,"Boolean value: %02x",temp); |
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*result = psiconv_bool_true; |
| 290 |
return 0; |
| 291 |
} |
| 292 |
|
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psiconv_string_t psiconv_read_string(const psiconv_config config, |
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const psiconv_buffer buf,int lev, |
| 295 |
psiconv_u32 off,int *length, int *status) |
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{ |
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return psiconv_read_string_aux(config,buf,lev,off,length,status,0); |
| 298 |
} |
| 299 |
|
| 300 |
psiconv_string_t psiconv_read_short_string(const psiconv_config config, |
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const psiconv_buffer buf,int lev, |
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psiconv_u32 off,int *length, int *status) |
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{ |
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return psiconv_read_string_aux(config,buf,lev,off,length,status,1); |
| 305 |
} |
| 306 |
|
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psiconv_string_t psiconv_read_string_aux(const psiconv_config config, |
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const psiconv_buffer buf,int lev, |
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psiconv_u32 off,int *length, int *status, |
| 310 |
int kind) |
| 311 |
{ |
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int stringlen,i,leng,len,localstatus; |
| 313 |
psiconv_string_t result; |
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char *res_copy; |
| 315 |
|
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psiconv_progress(config,lev+1,off,"Going to read a string"); |
| 317 |
|
| 318 |
if (kind == 0) |
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stringlen = psiconv_read_S(config,buf,lev+2,off,&leng,&localstatus); |
| 320 |
else { |
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stringlen = psiconv_read_u8(config,buf,lev+2,off,&localstatus); |
| 322 |
leng = 1; |
| 323 |
} |
| 324 |
|
| 325 |
if (localstatus) |
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goto ERROR1; |
| 327 |
psiconv_debug(config,lev+2,off,"Length: %i",stringlen); |
| 328 |
len = leng; |
| 329 |
|
| 330 |
result = malloc(stringlen + 1); |
| 331 |
if (!result) |
| 332 |
goto ERROR1; |
| 333 |
for (i = 0; (i < stringlen) && !localstatus; i++) |
| 334 |
result[i] = psiconv_read_u8(config,buf,lev,off+i+len,&localstatus); |
| 335 |
if (localstatus) |
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goto ERROR2; |
| 337 |
result[stringlen] = 0; |
| 338 |
len += stringlen; |
| 339 |
|
| 340 |
res_copy = psiconv_make_printable(result); |
| 341 |
if (!res_copy) |
| 342 |
goto ERROR2; |
| 343 |
psiconv_debug(config,lev+2,off,"Contents: `%s'",res_copy); |
| 344 |
free(res_copy); |
| 345 |
|
| 346 |
if (length) |
| 347 |
*length = len; |
| 348 |
|
| 349 |
if (status) |
| 350 |
*status = 0; |
| 351 |
|
| 352 |
psiconv_progress(config,lev+1,off+len-1,"End of string (total length: %08x)",len); |
| 353 |
|
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return result; |
| 355 |
|
| 356 |
ERROR2: |
| 357 |
free(result); |
| 358 |
ERROR1: |
| 359 |
psiconv_warn(config,lev+1,off,"Reading of string failed"); |
| 360 |
if (status) |
| 361 |
*status = localstatus; |
| 362 |
if (length) |
| 363 |
*length = 0; |
| 364 |
return NULL; |
| 365 |
} |
| 366 |
|
| 367 |
psiconv_float_t psiconv_read_float(const psiconv_config config,const psiconv_buffer buf, int lev, |
| 368 |
psiconv_u32 off, int *length, int *status) |
| 369 |
{ |
| 370 |
psiconv_float_t result,bitvalue; |
| 371 |
int res,bit; |
| 372 |
psiconv_u32 temp=0; |
| 373 |
|
| 374 |
psiconv_progress(config,lev+1,off,"Going to read a float"); |
| 375 |
|
| 376 |
bitvalue = 0.5; |
| 377 |
result = 1.0; |
| 378 |
for (bit = 0x33; bit > 0; bit--) { |
| 379 |
if ((bit == 0x33) || ((bit & 0x07) == 0x07)) |
| 380 |
temp = psiconv_read_u8(config,buf,lev+2,off+ (bit >> 3),&res); |
| 381 |
if (res) |
| 382 |
goto ERROR; |
| 383 |
if (temp & (0x01 << (bit & 0x07))) |
| 384 |
result += bitvalue; |
| 385 |
bitvalue /= 2.0; |
| 386 |
} |
| 387 |
temp = psiconv_read_u16(config,buf,lev+2,off+6,&res); |
| 388 |
if (res) |
| 389 |
goto ERROR; |
| 390 |
if (temp & 0x8000) |
| 391 |
result = -result; |
| 392 |
temp = (temp & 0x7ff0) >> 4; |
| 393 |
result *= pow2(((int) temp)-0x3ff); |
| 394 |
psiconv_debug(config,lev+1,off,"Float value: %f",result); |
| 395 |
if (length) |
| 396 |
*length = 8; |
| 397 |
if (*status) |
| 398 |
*status = res; |
| 399 |
return result; |
| 400 |
ERROR: |
| 401 |
psiconv_warn(config,lev+1,off,"Reading of float failed"); |
| 402 |
if (length) |
| 403 |
*length = 0; |
| 404 |
if (*status) |
| 405 |
*status = res; |
| 406 |
return 0.0; |
| 407 |
} |
| 408 |
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