1 |
/* |
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parse_simple.c - Part of psiconv, a PSION 5 file formats converter |
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Copyright (c) 1999-2005 Frodo Looijaard <frodo@frodo.looijaard.name> |
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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" |
21 |
#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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#include "unicode.h" |
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|
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#ifdef DMALLOC |
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#include <dmalloc.h> |
32 |
#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, |
36 |
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; |
49 |
|
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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_error(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_error(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_error(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_u32 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_u32 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_error(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_error(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_u32 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_u32 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_error(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) |
203 |
*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_error(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)); |
229 |
if (localstatus) { |
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psiconv_error(config,lev+1,off,"Reading of length failed"); |
231 |
if (length) |
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*length = 0; |
233 |
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); |
238 |
if (length) |
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*length = 4; |
240 |
if (status) |
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*status = 0; |
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return res; |
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} |
244 |
|
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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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{ |
248 |
psiconv_size_t res; |
249 |
int localstatus; |
250 |
res = ((psiconv_s32) psiconv_read_u32(config,buf,lev,off,&localstatus)) / 20.0; |
251 |
if (localstatus) { |
252 |
psiconv_error(config,lev+1,off,"Reading of size failed"); |
253 |
if (length) |
254 |
*length = 0; |
255 |
if (status) |
256 |
*status = localstatus; |
257 |
return 0; |
258 |
} |
259 |
psiconv_debug(config,lev+1,off,"Size: %f",res); |
260 |
if (status) |
261 |
*status = 0; |
262 |
if (length) |
263 |
*length = 4; |
264 |
return res; |
265 |
} |
266 |
|
267 |
int psiconv_parse_bool(const psiconv_config config,const psiconv_buffer buf, int lev, psiconv_u32 off, |
268 |
int *length, psiconv_bool_t *result) |
269 |
{ |
270 |
psiconv_u8 temp; |
271 |
int localstatus; |
272 |
temp = psiconv_read_u8(config,buf,lev,off,&localstatus); |
273 |
if (localstatus) { |
274 |
psiconv_error(config,lev+1,off,"Reading of bool failed"); |
275 |
if (length) |
276 |
*length = 0; |
277 |
return localstatus; |
278 |
} |
279 |
if (length) |
280 |
*length = 1; |
281 |
if (temp == 0) { |
282 |
*result = psiconv_bool_false; |
283 |
return 0; |
284 |
} else if (temp == 1) { |
285 |
*result = psiconv_bool_true; |
286 |
return 0; |
287 |
} |
288 |
psiconv_warn(config,lev+1,off,"Unknown value for boolean"); |
289 |
psiconv_debug(config,lev+1,off,"Boolean value: %02x",temp); |
290 |
*result = psiconv_bool_true; |
291 |
return 0; |
292 |
} |
293 |
|
294 |
psiconv_string_t psiconv_read_string(const psiconv_config config, |
295 |
const psiconv_buffer buf,int lev, |
296 |
psiconv_u32 off,int *length, int *status) |
297 |
{ |
298 |
return psiconv_read_string_aux(config,buf,lev,off,length,status,-1); |
299 |
} |
300 |
|
301 |
psiconv_string_t psiconv_read_short_string(const psiconv_config config, |
302 |
const psiconv_buffer buf,int lev, |
303 |
psiconv_u32 off,int *length, int *status) |
304 |
{ |
305 |
return psiconv_read_string_aux(config,buf,lev,off,length,status,-2); |
306 |
} |
307 |
|
308 |
psiconv_string_t psiconv_read_charlist(const psiconv_config config, |
309 |
const psiconv_buffer buf, int lev, |
310 |
psiconv_u32 off, int nrofchars, |
311 |
int *status) |
312 |
{ |
313 |
int length; |
314 |
if (nrofchars <= 0) { |
315 |
psiconv_error(config,lev,off, |
316 |
"psiconv_read_charlist called with non-positive nrofchars"); |
317 |
if (status) |
318 |
*status = -PSICONV_E_OTHER; |
319 |
return NULL; |
320 |
} |
321 |
return psiconv_read_string_aux(config,buf,lev,off,&length,status,nrofchars); |
322 |
} |
323 |
|
324 |
|
325 |
psiconv_string_t psiconv_read_string_aux(const psiconv_config config, |
326 |
const psiconv_buffer buf,int lev, |
327 |
psiconv_u32 off,int *length, int *status, |
328 |
int kind) |
329 |
{ |
330 |
int bytecount,i,leng,len,localstatus; |
331 |
psiconv_string_t result; |
332 |
char *res_copy; |
333 |
psiconv_list string; |
334 |
psiconv_ucs2 nextchar; |
335 |
psiconv_ucs2 *nextcharptr; |
336 |
|
337 |
psiconv_progress(config,lev+1,off,"Going to read a string"); |
338 |
|
339 |
if (kind == -1) |
340 |
bytecount = psiconv_read_S(config,buf,lev+2,off,&leng,&localstatus); |
341 |
else if (kind == -2) { |
342 |
bytecount = psiconv_read_u8(config,buf,lev+2,off,&localstatus); |
343 |
leng = 1; |
344 |
} else { |
345 |
bytecount = kind; |
346 |
leng = 0; |
347 |
localstatus = 0; |
348 |
} |
349 |
if (localstatus) |
350 |
goto ERROR1; |
351 |
psiconv_debug(config,lev+2,off,"Length: %i",bytecount); |
352 |
len = leng; |
353 |
|
354 |
if (!(string = psiconv_list_new(sizeof(*result)))) |
355 |
goto ERROR1; |
356 |
|
357 |
/* Read the string into a temporary list */ |
358 |
i = 0; |
359 |
while (i < bytecount) { |
360 |
nextchar = psiconv_unicode_read_char(config,buf,lev,off+i+len, |
361 |
&leng,&localstatus); |
362 |
if (localstatus) |
363 |
goto ERROR2; |
364 |
if ((localstatus = psiconv_list_add(string,&nextchar))) |
365 |
goto ERROR2; |
366 |
i += leng; |
367 |
} |
368 |
if (i > bytecount) { |
369 |
psiconv_error(config,lev,off+i+len,"Malformed string"); |
370 |
localstatus = PSICONV_E_PARSE; |
371 |
goto ERROR2; |
372 |
} |
373 |
len += bytecount; |
374 |
|
375 |
/* Copy the list to the actual string */ |
376 |
if (!(result = malloc(sizeof(*result) * (psiconv_list_length(string) + 1)))) |
377 |
goto ERROR2; |
378 |
for (i = 0; i < psiconv_list_length(string); i++) { |
379 |
if (!(nextcharptr = psiconv_list_get(string,i))) { |
380 |
psiconv_error(config,lev,off+i+len,"Data structure corruption"); |
381 |
goto ERROR3; |
382 |
} |
383 |
result[i] = *nextcharptr; |
384 |
} |
385 |
result[i] = 0; |
386 |
|
387 |
res_copy = psiconv_make_printable(config,result); |
388 |
if (!res_copy) |
389 |
goto ERROR3; |
390 |
psiconv_debug(config,lev+2,off,"Contents: `%s'",res_copy); |
391 |
free(res_copy); |
392 |
|
393 |
psiconv_list_free(string); |
394 |
|
395 |
if (length) |
396 |
*length = len; |
397 |
|
398 |
if (status) |
399 |
*status = 0; |
400 |
|
401 |
psiconv_progress(config,lev+1,off+len-1,"End of string (total length: %08x)",len); |
402 |
|
403 |
return result; |
404 |
|
405 |
ERROR3: |
406 |
free(result); |
407 |
ERROR2: |
408 |
psiconv_list_free(string); |
409 |
ERROR1: |
410 |
psiconv_error(config,lev+1,off,"Reading of string failed"); |
411 |
if (status) |
412 |
*status = localstatus; |
413 |
if (length) |
414 |
*length = 0; |
415 |
return NULL; |
416 |
} |
417 |
|
418 |
psiconv_float_t psiconv_read_float(const psiconv_config config,const psiconv_buffer buf, int lev, |
419 |
psiconv_u32 off, int *length, int *status) |
420 |
{ |
421 |
psiconv_float_t result,bitvalue; |
422 |
int res,bit; |
423 |
psiconv_u32 temp=0; |
424 |
|
425 |
psiconv_progress(config,lev+1,off,"Going to read a float"); |
426 |
|
427 |
bitvalue = 0.5; |
428 |
result = 1.0; |
429 |
for (bit = 0x33; bit > 0; bit--) { |
430 |
if ((bit == 0x33) || ((bit & 0x07) == 0x07)) |
431 |
temp = psiconv_read_u8(config,buf,lev+2,off+ (bit >> 3),&res); |
432 |
if (res) |
433 |
goto ERROR; |
434 |
if (temp & (0x01 << (bit & 0x07))) |
435 |
result += bitvalue; |
436 |
bitvalue /= 2.0; |
437 |
} |
438 |
temp = psiconv_read_u16(config,buf,lev+2,off+6,&res); |
439 |
if (res) |
440 |
goto ERROR; |
441 |
if (temp & 0x8000) |
442 |
result = -result; |
443 |
temp = (temp & 0x7ff0) >> 4; |
444 |
result *= pow2(((int) temp)-0x3ff); |
445 |
psiconv_debug(config,lev+1,off,"Float value: %f",result); |
446 |
if (length) |
447 |
*length = 8; |
448 |
if (*status) |
449 |
*status = res; |
450 |
return result; |
451 |
ERROR: |
452 |
psiconv_error(config,lev+1,off,"Reading of float failed"); |
453 |
if (length) |
454 |
*length = 0; |
455 |
if (*status) |
456 |
*status = res; |
457 |
return 0.0; |
458 |
} |
459 |
|