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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 |
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(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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/* 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_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(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_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(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_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(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_S_t psiconv_read_S(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(lev+1,off,"Going to read a S length indicator"); |
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temp = psiconv_read_u8(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(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(lev+2,off,"Indicator (1 byte): %02x",res); |
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} else if ((temp & 0x07) == 0x03) { |
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res = psiconv_read_u16(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(lev+2,off,"Indicator (2 bytes): %04x",res); |
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} else { |
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psiconv_warn(lev+2,off,"S indicator: unknown encoding!"); |
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psiconv_debug(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(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(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_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(lev+1,off,"Going to read a X length indicator"); |
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temp = psiconv_read_u8(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(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(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(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(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(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(lev+2,off,"Indicator (4 bytes): %08x",res); |
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} else { |
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psiconv_warn(lev+2,off,"X indicator: unknown encoding!"); |
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psiconv_debug(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(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(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_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(buf,lev,off, |
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&localstatus)); |
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if (localstatus) { |
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psiconv_warn(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(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_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(buf,lev,off,&localstatus)) / 20.0; |
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if (localstatus) { |
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psiconv_warn(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(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_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(buf,lev,off,&localstatus); |
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if (localstatus) { |
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psiconv_warn(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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} |
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if (length) |
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*length = 1; |
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if (temp == 0) { |
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*result = psiconv_bool_false; |
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return 0; |
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} 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(lev+1,off,"Unknown value for boolean"); |
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psiconv_debug(lev+1,off,"Boolean value: %02x",temp); |
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*result = psiconv_bool_true; |
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return 0; |
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} |
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|
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psiconv_string_t psiconv_read_string(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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int stringlen,i,leng,len,localstatus; |
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psiconv_string_t result; |
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char *res_copy; |
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|
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psiconv_progress(lev+1,off,"Going to read a string"); |
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|
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stringlen = psiconv_read_S(buf,lev+2,off,&leng,&localstatus); |
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if (localstatus) |
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goto ERROR1; |
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psiconv_debug(lev+2,off,"Length: %i",stringlen); |
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len = leng; |
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|
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result = malloc(stringlen + 1); |
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if (!result) |
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goto ERROR1; |
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for (i = 0; (i < stringlen) && !localstatus; i++) |
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result[i] = psiconv_read_u8(buf,lev,off+i+len,&localstatus); |
288 |
if (localstatus) |
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goto ERROR2; |
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result[stringlen] = 0; |
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len += stringlen; |
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|
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res_copy = psiconv_make_printable(result); |
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if (!res_copy) |
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goto ERROR2; |
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psiconv_debug(lev+2,off,"Contents: `%s'",res_copy); |
297 |
free(res_copy); |
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|
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if (length) |
300 |
*length = len; |
301 |
|
302 |
if (status) |
303 |
*status = 0; |
304 |
|
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psiconv_progress(lev+1,off+len-1,"End of string (total length: %08x)",len); |
306 |
|
307 |
return result; |
308 |
|
309 |
ERROR2: |
310 |
free(result); |
311 |
ERROR1: |
312 |
psiconv_warn(lev+1,off,"Reading of string failed"); |
313 |
if (status) |
314 |
*status = localstatus; |
315 |
if (length) |
316 |
*length = 0; |
317 |
return NULL; |
318 |
} |
319 |
|
320 |
psiconv_string_t psiconv_read_short_string(const psiconv_buffer buf, |
321 |
int lev, |
322 |
psiconv_u32 off,int *length, int *status) |
323 |
{ |
324 |
int stringlen,i,len,localstatus; |
325 |
psiconv_string_t result; |
326 |
char *res_copy; |
327 |
|
328 |
psiconv_progress(lev+1,off,"Going to read a short string"); |
329 |
|
330 |
stringlen = psiconv_read_u8(buf,lev+2,off,&localstatus); |
331 |
if (localstatus) |
332 |
goto ERROR1; |
333 |
psiconv_debug(lev+2,off,"Length: %i",stringlen); |
334 |
len = 1; |
335 |
|
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result = malloc(stringlen + 1); |
337 |
if (!result) |
338 |
goto ERROR1; |
339 |
for (i = 0; (i < stringlen) && !localstatus; i++) |
340 |
result[i] = psiconv_read_u8(buf,lev,off+i+len,&localstatus); |
341 |
if (localstatus) |
342 |
goto ERROR2; |
343 |
result[stringlen] = 0; |
344 |
len += stringlen; |
345 |
|
346 |
res_copy = psiconv_make_printable(result); |
347 |
if (!res_copy) |
348 |
goto ERROR2; |
349 |
psiconv_debug(lev+2,off,"Contents: `%s'",res_copy); |
350 |
free(res_copy); |
351 |
|
352 |
if (length) |
353 |
*length = len; |
354 |
|
355 |
if (status) |
356 |
*status = 0; |
357 |
|
358 |
psiconv_progress(lev+1,off+len-1,"End of short string (total length: %08x)", |
359 |
len); |
360 |
|
361 |
return result; |
362 |
|
363 |
|
364 |
ERROR2: |
365 |
free(result); |
366 |
ERROR1: |
367 |
psiconv_warn(lev+1,off,"Reading of short string failed"); |
368 |
if (status) |
369 |
*status = localstatus; |
370 |
if (length) |
371 |
*length = 0; |
372 |
return NULL; |
373 |
} |
374 |
|
375 |
psiconv_float_t psiconv_read_float(const psiconv_buffer buf, int lev, |
376 |
psiconv_u32 off, int *length, int *status) |
377 |
{ |
378 |
psiconv_float_t result,bitvalue; |
379 |
int res,bit; |
380 |
psiconv_u32 temp=0; |
381 |
|
382 |
psiconv_progress(lev+1,off,"Going to read a float"); |
383 |
|
384 |
bitvalue = 0.5; |
385 |
result = 1.0; |
386 |
for (bit = 0x33; bit > 0; bit--) { |
387 |
if ((bit == 0x33) || ((bit & 0x07) == 0x07)) |
388 |
temp = psiconv_read_u8(buf,lev+2,off+ (bit >> 3),&res); |
389 |
if (res) |
390 |
goto ERROR; |
391 |
if (temp & (0x01 << (bit & 0x07))) |
392 |
result += bitvalue; |
393 |
bitvalue /= 2.0; |
394 |
} |
395 |
temp = psiconv_read_u16(buf,lev+2,off+6,&res); |
396 |
if (res) |
397 |
goto ERROR; |
398 |
if (temp & 0x8000) |
399 |
result = -result; |
400 |
temp = (temp & 0x7ff0) >> 4; |
401 |
result *= pow2(((int) temp)-0x3ff); |
402 |
psiconv_debug(lev+1,off,"Float value: %f",result); |
403 |
if (length) |
404 |
*length = 8; |
405 |
if (*status) |
406 |
*status = res; |
407 |
return result; |
408 |
ERROR: |
409 |
psiconv_warn(lev+1,off,"Reading of float failed"); |
410 |
if (length) |
411 |
*length = 0; |
412 |
if (*status) |
413 |
*status = res; |
414 |
return 0.0; |
415 |
} |
416 |
|