251cced1f8
Various minor things done to project files Updated sample extension project file and updated makefile to the new unified version (more changes likely on the way) Updated regex project file and makefile --HG-- extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%401971
168 lines
3.7 KiB
C
168 lines
3.7 KiB
C
/* Pawn compiler
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*
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* Routines to maintain a "text file" in memory.
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*
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* Copyright (c) ITB CompuPhase, 2003-2006
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*
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* This software is provided 'as-is', without any express or implied warranty.
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* In no event will the authors be held liable for any damages arising from the
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* use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software in
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* a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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*
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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*
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* 3. This notice may not be removed or altered from any source distribution.
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*
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* Version: $Id$
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*/
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "memfile.h"
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#if defined FORTIFY
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#include <alloc/fortify.h>
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#endif
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typedef memfile_t MEMFILE;
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#define tMEMFILE 1
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#include "sc.h"
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MEMFILE *mfcreate(const char *filename)
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{
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return memfile_creat(filename, 4096);
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}
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void mfclose(MEMFILE *mf)
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{
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memfile_destroy(mf);
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}
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int mfdump(MEMFILE *mf)
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{
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FILE *fp;
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int okay;
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assert(mf!=NULL);
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/* create the file */
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fp=fopen(mf->name, "wb");
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if (fp==NULL)
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return 0;
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okay=1;
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okay = okay & (fwrite(mf->base, mf->usedoffs, 1, fp)==(size_t)mf->usedoffs);
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fclose(fp);
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return okay;
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}
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long mflength(const MEMFILE *mf)
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{
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return mf->usedoffs;
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}
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long mfseek(MEMFILE *mf,long offset,int whence)
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{
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long length;
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assert(mf!=NULL);
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if (mf->usedoffs == 0)
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return 0L; /* early exit: not a single byte in the file */
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/* find the size of the memory file */
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length=mflength(mf);
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/* convert the offset to an absolute position */
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switch (whence) {
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case SEEK_SET:
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break;
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case SEEK_CUR:
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offset+=mf->offs;
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break;
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case SEEK_END:
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assert(offset<=0);
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offset+=length;
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break;
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} /* switch */
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/* clamp to the file length limit */
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if (offset<0)
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offset=0;
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else if (offset>length)
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offset=length;
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/* set new position and return it */
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memfile_seek(mf, offset);
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return offset;
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}
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unsigned int mfwrite(MEMFILE *mf,const unsigned char *buffer,unsigned int size)
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{
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return (memfile_write(mf, buffer, size) ? size : 0);
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}
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unsigned int mfread(MEMFILE *mf,unsigned char *buffer,unsigned int size)
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{
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return memfile_read(mf, buffer, size);
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}
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char *mfgets(MEMFILE *mf,char *string,unsigned int size)
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{
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char *ptr;
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unsigned int read;
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long seek;
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assert(mf!=NULL);
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read=mfread(mf,(unsigned char *)string,size);
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if (read==0)
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return NULL;
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seek=0L;
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/* make sure that the string is zero-terminated */
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assert(read<=size);
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if (read<size) {
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string[read]='\0';
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} else {
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string[size-1]='\0';
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seek=-1; /* undo reading the character that gets overwritten */
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} /* if */
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/* find the first '\n' */
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ptr=strchr(string,'\n');
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if (ptr!=NULL) {
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*(ptr+1)='\0';
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seek=(long)(ptr-string)+1-(long)read;
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} /* if */
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/* undo over-read */
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assert(seek<=0); /* should seek backward only */
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if (seek!=0)
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mfseek(mf,seek,SEEK_CUR);
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return string;
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}
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int mfputs(MEMFILE *mf,const char *string)
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{
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unsigned int written,length;
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assert(mf!=NULL);
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length=strlen(string);
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written=mfwrite(mf,(unsigned char *)string,length);
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return written==length;
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}
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