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/* |
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buffer.c - Part of psiconv, a PSION 5 file formats converter |
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Copyright (c) 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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|
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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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|
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#include "list.h" |
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#include "error.h" |
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#include "buffer.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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typedef struct psiconv_relocation_s { |
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psiconv_u32 offset; |
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int id; |
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} *psiconv_relocation; |
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|
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struct psiconv_buffer_s { |
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psiconv_list reloc_target; /* of struct relocation_s */ |
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psiconv_list reloc_ref; /* of struct relocation_s */ |
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psiconv_list data; /* of psiconv_u8 */ |
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}; |
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|
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static psiconv_u32 unique_id = 1; |
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|
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psiconv_u32 psiconv_buffer_unique_id(void) |
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{ |
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return unique_id ++; |
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} |
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|
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psiconv_buffer psiconv_buffer_new(void) |
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{ |
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psiconv_buffer buf; |
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if (!(buf = malloc(sizeof(*buf)))) |
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goto ERROR1; |
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if (!(buf->data = psiconv_list_new(sizeof(psiconv_u8)))) |
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goto ERROR2; |
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if (!(buf->reloc_target = psiconv_list_new( |
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sizeof(struct psiconv_relocation_s)))) |
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goto ERROR3; |
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if (!(buf->reloc_ref = psiconv_list_new( |
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sizeof(struct psiconv_relocation_s)))) |
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goto ERROR4; |
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return buf; |
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ERROR4: |
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psiconv_list_free(buf->reloc_target); |
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ERROR3: |
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psiconv_list_free(buf->data); |
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ERROR2: |
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free(buf); |
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ERROR1: |
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return NULL; |
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} |
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|
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void psiconv_buffer_free(psiconv_buffer buf) |
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{ |
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psiconv_list_free(buf->reloc_ref); |
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psiconv_list_free(buf->reloc_target); |
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psiconv_list_free(buf->data); |
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free(buf); |
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} |
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|
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psiconv_u32 psiconv_buffer_length(const psiconv_buffer buf) |
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{ |
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return psiconv_list_length(buf->data); |
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} |
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|
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psiconv_u8 *psiconv_buffer_get(const psiconv_buffer buf, psiconv_u32 off) |
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{ |
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return psiconv_list_get(buf->data,off); |
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} |
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|
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int psiconv_buffer_add(psiconv_buffer buf,psiconv_u8 data) |
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{ |
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return psiconv_list_add(buf->data,&data); |
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} |
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|
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size_t psiconv_buffer_fread(psiconv_buffer buf, size_t size, FILE *f) |
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{ |
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return psiconv_list_fread(buf->data,size,f); |
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} |
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|
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int psiconv_buffer_fread_all(psiconv_buffer buf, FILE *f) |
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{ |
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return psiconv_list_fread_all(buf->data,f); |
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} |
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|
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int psiconv_buffer_fwrite_all(const psiconv_buffer buf, FILE *f) |
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{ |
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return psiconv_list_fwrite_all(buf->data,f); |
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} |
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|
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int psiconv_buffer_subbuffer(psiconv_buffer *buf, const psiconv_buffer org, |
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psiconv_u32 offset, psiconv_u32 length) |
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{ |
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int i; |
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int res; |
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psiconv_u8 *data; |
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if (! (*buf = psiconv_buffer_new())) { |
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res = PSICONV_E_NOMEM; |
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goto ERROR1; |
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} |
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for (i = 0; i < length; i++) { |
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if (!(data = psiconv_buffer_get(org,offset+i))) { |
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res = PSICONV_E_OTHER; |
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goto ERROR2; |
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} |
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if ((res = psiconv_buffer_add(*buf,*data))) { |
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goto ERROR2; |
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} |
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} |
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|
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ERROR2: |
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psiconv_buffer_free(*buf); |
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ERROR1: |
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return res; |
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} |
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|
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int psiconv_buffer_concat(psiconv_buffer buf, const psiconv_buffer extra) |
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{ |
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int res; |
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psiconv_u32 i; |
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psiconv_relocation reloc; |
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|
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|
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for (i = 0; i < psiconv_list_length(extra->reloc_target); i++) { |
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if (!(reloc = psiconv_list_get(extra->reloc_target,i))) |
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return -PSICONV_E_OTHER; |
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reloc->offset += psiconv_list_length(buf->data); |
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if ((res=psiconv_list_add(buf->reloc_target,reloc))) |
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return res; |
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} |
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for (i = 0; i < psiconv_list_length(extra->reloc_ref); i++) { |
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if (!(reloc = psiconv_list_get(extra->reloc_ref,i))) |
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return -PSICONV_E_OTHER; |
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reloc->offset += psiconv_list_length(buf->data); |
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if ((res = psiconv_list_add(buf->reloc_ref,reloc))) |
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return res; |
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} |
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return psiconv_list_concat(buf->data,extra->data); |
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} |
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|
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int psiconv_buffer_resolve(psiconv_buffer buf) |
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{ |
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int res; |
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psiconv_u32 i,j,temp; |
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psiconv_relocation target,ref; |
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|
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for (i = 0; i < psiconv_list_length(buf->reloc_ref);i++) { |
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if (!(ref = psiconv_list_get(buf->reloc_ref,i))) |
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return -PSICONV_E_OTHER; |
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for (j = 0; j < psiconv_list_length(buf->reloc_target);j++) { |
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if (!(target = psiconv_list_get(buf->reloc_target,j))) |
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return -PSICONV_E_OTHER; |
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if (ref->id == target->id) { |
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temp = target->offset & 0xff; |
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if ((res = psiconv_list_replace(buf->data,ref->offset,&temp))) |
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return -PSICONV_E_OTHER; |
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temp = (target->offset >> 8) & 0xff; |
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if ((res = psiconv_list_replace(buf->data,ref->offset + 1,&temp))) |
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return -PSICONV_E_OTHER; |
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temp = (target->offset >> 16) & 0xff; |
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if ((res = psiconv_list_replace(buf->data,ref->offset + 2,&temp))) |
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return -PSICONV_E_OTHER; |
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temp = (target->offset >> 24) & 0xff; |
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if ((res = psiconv_list_replace(buf->data,ref->offset + 3,&temp))) |
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return -PSICONV_E_OTHER; |
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break; |
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} |
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} |
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if (j == psiconv_list_length(buf->reloc_target)) |
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return -PSICONV_E_OTHER; |
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} |
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psiconv_list_empty(buf->reloc_target); |
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psiconv_list_empty(buf->reloc_ref); |
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return -PSICONV_E_OK; |
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} |
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|
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int psiconv_buffer_add_reference(psiconv_buffer buf,int id) |
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{ |
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struct psiconv_relocation_s reloc; |
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int res,i; |
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psiconv_u8 data; |
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|
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reloc.offset = psiconv_list_length(buf->data); |
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reloc.id = id; |
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if ((res = psiconv_list_add(buf->reloc_ref,&reloc))) |
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return res; |
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data = 0x00; |
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for (i = 0; i < 4; i++) |
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if ((res = psiconv_list_add(buf->data,&data))) |
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return res; |
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return -PSICONV_E_OK; |
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} |
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|
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int psiconv_buffer_add_target(psiconv_buffer buf, int id) |
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{ |
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struct psiconv_relocation_s reloc; |
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|
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reloc.offset = psiconv_list_length(buf->data); |
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reloc.id = id; |
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return psiconv_list_add(buf->reloc_target,&reloc); |
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} |
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