cmFile.h/c : Added cmFileCopy() and cmFileBackup().
This commit is contained in:
parent
6d317d54ca
commit
92a9b18f44
173
cmFile.c
173
cmFile.c
@ -2,9 +2,13 @@
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#include "cmGlobal.h"
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#include "cmGlobal.h"
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#include "cmRpt.h"
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#include "cmRpt.h"
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#include "cmErr.h"
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#include "cmErr.h"
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#include "cmCtx.h"
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#include "cmFile.h"
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#include "cmFile.h"
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#include "cmFileSys.h"
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#include "cmMem.h"
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#include "cmMem.h"
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#include "cmMallocDebug.h"
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#include "cmMallocDebug.h"
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#include "cmLinkedHeap.h"
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#include "cmText.h"
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#include <sys/stat.h>
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#include <sys/stat.h>
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cmFileH_t cmFileNullHandle = { NULL };
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cmFileH_t cmFileNullHandle = { NULL };
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@ -34,9 +38,9 @@ cmFileRC_t _cmFileError( cmFile_t* p, cmFileRC_t rc, int errNumb, const cmChar_t
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cmFileRC_t cmFileOpen( cmFileH_t* hp, const cmChar_t* fn, enum cmFileOpenFlags_t flags, cmRpt_t* rpt )
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cmFileRC_t cmFileOpen( cmFileH_t* hp, const cmChar_t* fn, enum cmFileOpenFlags_t flags, cmRpt_t* rpt )
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{
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{
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char mode[] = "/0/0/0";
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char mode[] = "/0/0/0";
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cmFile_t* p = NULL;
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cmFile_t* p = NULL;
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cmErr_t err;
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cmErr_t err;
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cmFileRC_t rc;
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cmFileRC_t rc;
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if((rc = cmFileClose(hp)) != kOkFileRC )
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if((rc = cmFileClose(hp)) != kOkFileRC )
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@ -47,21 +51,21 @@ cmFileRC_t cmFileOpen( cmFileH_t* hp, const cmChar_t* fn, enum cmFileOpenFlag
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hp->h = NULL;
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hp->h = NULL;
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if( cmIsFlag(flags,kReadFileFl) )
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if( cmIsFlag(flags,kReadFileFl) )
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mode[0]='r';
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mode[0] = 'r';
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else
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else
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if( cmIsFlag(flags,kWriteFileFl) )
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if( cmIsFlag(flags,kWriteFileFl) )
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mode[0]='w';
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mode[0] = 'w';
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else
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else
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if( cmIsFlag(flags,kAppendFileFl) )
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if( cmIsFlag(flags,kAppendFileFl) )
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mode[0]='a';
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mode[0] = 'a';
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else
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else
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cmErrMsg(&err,kInvalidFlagFileRC,"File open flags must contain 'kReadFileFl','kWriteFileFl', or 'kAppendFileFl'.");
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cmErrMsg(&err,kInvalidFlagFileRC,"File open flags must contain 'kReadFileFl','kWriteFileFl', or 'kAppendFileFl'.");
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if( cmIsFlag(flags,kUpdateFileFl) )
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if( cmIsFlag(flags,kUpdateFileFl) )
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mode[1]='+';
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mode[1] = '+';
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// handle requests to use stdin,stdout,stderr
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// handle requests to use stdin,stdout,stderr
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FILE* sfp = NULL;
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FILE* sfp = NULL;
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if( cmIsFlag(flags,kStdoutFileFl) )
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if( cmIsFlag(flags,kStdoutFileFl) )
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{
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{
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sfp = stdout;
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sfp = stdout;
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@ -107,7 +111,7 @@ cmFileRC_t cmFileOpen( cmFileH_t* hp, const cmChar_t* fn, enum cmFileOpenFlag
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}
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}
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}
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}
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hp->h = p;
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hp->h = p;
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return kOkFileRC;
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return kOkFileRC;
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}
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}
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@ -158,7 +162,7 @@ cmFileRC_t cmFileWrite( cmFileH_t h, const void* buf, unsigned bufByteCnt )
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cmFileRC_t cmFileSeek( cmFileH_t h, enum cmFileSeekFlags_t flags, int offsByteCnt )
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cmFileRC_t cmFileSeek( cmFileH_t h, enum cmFileSeekFlags_t flags, int offsByteCnt )
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{
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{
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cmFile_t* p = _cmFileHandleToPtr(h);
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cmFile_t* p = _cmFileHandleToPtr(h);
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unsigned fileflags = 0;
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unsigned fileflags = 0;
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if( cmIsFlag(flags,kBeginFileFl) )
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if( cmIsFlag(flags,kBeginFileFl) )
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fileflags = SEEK_SET;
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fileflags = SEEK_SET;
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@ -171,7 +175,7 @@ cmFileRC_t cmFileSeek( cmFileH_t h, enum cmFileSeekFlags_t flags, int offsByt
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else
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else
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return cmErrMsg(&p->err,kInvalidFlagFileRC,"Invalid file seek flag on '%s'.",p->fnStr);
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return cmErrMsg(&p->err,kInvalidFlagFileRC,"Invalid file seek flag on '%s'.",p->fnStr);
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errno = 0;
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errno = 0;
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if( fseek(p->fp,offsByteCnt,fileflags) != 0 )
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if( fseek(p->fp,offsByteCnt,fileflags) != 0 )
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return _cmFileError(p,kSeekFailFileRC,errno,"File seek failed");
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return _cmFileError(p,kSeekFailFileRC,errno,"File seek failed");
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@ -181,9 +185,10 @@ cmFileRC_t cmFileSeek( cmFileH_t h, enum cmFileSeekFlags_t flags, int offsByt
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cmFileRC_t cmFileTell( cmFileH_t h, long* offsPtr )
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cmFileRC_t cmFileTell( cmFileH_t h, long* offsPtr )
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{
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{
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assert( offsPtr != NULL );
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assert( offsPtr != NULL );
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*offsPtr = -1;
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*offsPtr = -1;
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cmFile_t* p = _cmFileHandleToPtr(h);
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cmFile_t* p = _cmFileHandleToPtr(h);
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errno = 0;
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errno = 0;
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if((*offsPtr = ftell(p->fp)) == -1)
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if((*offsPtr = ftell(p->fp)) == -1)
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return _cmFileError(p,kTellFailFileRC,errno,"File tell failed");
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return _cmFileError(p,kTellFailFileRC,errno,"File tell failed");
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return kOkFileRC;
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return kOkFileRC;
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@ -222,7 +227,7 @@ cmFileRC_t cmFileByteCountFn( const cmChar_t* fn, cmRpt_t* rpt, unsigned* file
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{
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{
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assert( fileByteCntPtr != NULL );
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assert( fileByteCntPtr != NULL );
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cmFileRC_t rc;
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cmFileRC_t rc;
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cmFileH_t h = cmFileNullHandle;
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cmFileH_t h = cmFileNullHandle;
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if((rc = cmFileOpen(&h,fn,kReadFileFl,rpt)) != kOkFileRC )
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if((rc = cmFileOpen(&h,fn,kReadFileFl,rpt)) != kOkFileRC )
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return rc;
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return rc;
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@ -241,8 +246,8 @@ cmFileRC_t cmFileCompare( const cmChar_t* fn0, const cmChar_t* fn1, cmRpt_t* rpt
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cmFileH_t h0 = cmFileNullHandle;
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cmFileH_t h0 = cmFileNullHandle;
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cmFileH_t h1 = cmFileNullHandle;
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cmFileH_t h1 = cmFileNullHandle;
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char b0[ bufByteCnt ];
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char b0[ bufByteCnt ];
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char b1[ bufByteCnt ];
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char b1[ bufByteCnt ];
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assert(isEqualPtr != NULL );
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assert(isEqualPtr != NULL );
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*isEqualPtr = true;
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*isEqualPtr = true;
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@ -253,14 +258,14 @@ cmFileRC_t cmFileCompare( const cmChar_t* fn0, const cmChar_t* fn1, cmRpt_t* rpt
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if((rc = cmFileOpen(&h1,fn1,kReadFileFl,rpt)) != kOkFileRC )
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if((rc = cmFileOpen(&h1,fn1,kReadFileFl,rpt)) != kOkFileRC )
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goto errLabel;
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goto errLabel;
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cmFile_t* p0 = _cmFileHandleToPtr(h0);
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cmFile_t* p0 = _cmFileHandleToPtr(h0);
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cmFile_t* p1 = _cmFileHandleToPtr(h1);
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cmFile_t* p1 = _cmFileHandleToPtr(h1);
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while(1)
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while(1)
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{
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{
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size_t n0 = fread(b0,1,bufByteCnt,p0->fp);
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size_t n0 = fread(b0,1,bufByteCnt,p0->fp);
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size_t n1 = fread(b1,1,bufByteCnt,p1->fp);
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size_t n1 = fread(b1,1,bufByteCnt,p1->fp);
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if( n0 != n1 || memcmp(b0,b1,n0)!=0 )
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if( n0 != n1 || memcmp(b0,b1,n0) != 0 )
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{
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{
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*isEqualPtr = false;
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*isEqualPtr = false;
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break;
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break;
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@ -285,7 +290,7 @@ const cmChar_t* cmFileName( cmFileH_t h )
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cmFileRC_t cmFileFnWrite( const cmChar_t* fn, cmRpt_t* rpt, const void* buf, unsigned bufByteCnt )
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cmFileRC_t cmFileFnWrite( const cmChar_t* fn, cmRpt_t* rpt, const void* buf, unsigned bufByteCnt )
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{
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{
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cmFileH_t h = cmFileNullHandle;
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cmFileH_t h = cmFileNullHandle;
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cmFileRC_t rc;
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cmFileRC_t rc;
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if((rc = cmFileOpen(&h,fn,kWriteFileFl,rpt)) != kOkFileRC )
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if((rc = cmFileOpen(&h,fn,kWriteFileFl,rpt)) != kOkFileRC )
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@ -305,7 +310,7 @@ cmChar_t* _cmFileToBuf( cmFileH_t h, unsigned nn, unsigned* bufByteCntPtr )
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unsigned n = cmFileByteCount(h);
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unsigned n = cmFileByteCount(h);
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cmChar_t* buf = NULL;
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cmChar_t* buf = NULL;
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cmFile_t* p = _cmFileHandleToPtr(h);
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cmFile_t* p = _cmFileHandleToPtr(h);
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// if the file size calculation is ok
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// if the file size calculation is ok
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@ -346,7 +351,7 @@ cmChar_t* _cmFileToBuf( cmFileH_t h, unsigned nn, unsigned* bufByteCntPtr )
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cmChar_t* _cmFileFnToBuf( const cmChar_t* fn, cmRpt_t* rpt, unsigned nn, unsigned* bufByteCntPtr )
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cmChar_t* _cmFileFnToBuf( const cmChar_t* fn, cmRpt_t* rpt, unsigned nn, unsigned* bufByteCntPtr )
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{
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{
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cmFileH_t h = cmFileNullHandle;
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cmFileH_t h = cmFileNullHandle;
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cmChar_t* buf = NULL;
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cmChar_t* buf = NULL;
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if( cmFileOpen(&h,fn,kReadFileFl | kBinaryFileFl,rpt) != kOkFileRC )
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if( cmFileOpen(&h,fn,kReadFileFl | kBinaryFileFl,rpt) != kOkFileRC )
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@ -360,6 +365,128 @@ cmChar_t* _cmFileFnToBuf( const cmChar_t* fn, cmRpt_t* rpt, unsigned nn, unsigne
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return buf;
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return buf;
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}
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}
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cmFileRC_t cmFileCopy(
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const cmChar_t* srcDir,
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const cmChar_t* srcFn,
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const cmChar_t* srcExt,
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const cmChar_t* dstDir,
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const cmChar_t* dstFn,
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const cmChar_t* dstExt,
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cmErr_t* err)
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{
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cmFileRC_t rc = kOkFileRC;
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unsigned byteCnt = 0;
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cmChar_t* buf = NULL;
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const cmChar_t* srcPathFn = NULL;
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const cmChar_t* dstPathFn = NULL;
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// form the source path fn
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if((srcPathFn = cmFsMakeFn(srcDir,srcFn,srcExt,NULL)) == NULL )
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{
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rc = cmErrMsg(err,kFileSysFailFileRC,"The soure file name for dir:%s name:%s ext:%s could not be formed.",cmStringNullGuard(srcDir),cmStringNullGuard(srcFn),cmStringNullGuard(srcExt));
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goto errLabel;
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}
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// form the dest path fn
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if((dstPathFn = cmFsMakeFn(dstDir,dstFn,dstExt,NULL)) == NULL )
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{
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rc = cmErrMsg(err,kFileSysFailFileRC,"The destination file name for dir:%s name:%s ext:%s could not be formed.",cmStringNullGuard(dstDir),cmStringNullGuard(dstFn),cmStringNullGuard(dstExt));
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goto errLabel;
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}
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// verify that the source exists
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if( cmFsIsFile(srcPathFn) == false )
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{
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rc = cmErrMsg(err,kOpenFailFileRC,"The source file '%s' does not exist.",cmStringNullGuard(srcPathFn));
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goto errLabel;
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}
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// read the source file into a buffer
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if((buf = cmFileFnToBuf(srcPathFn,err->rpt,&byteCnt)) == NULL )
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rc = cmErrMsg(err,kReadFailFileRC,"Attempt to fill a buffer from '%s' failed.",cmStringNullGuard(srcPathFn));
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else
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{
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// write the file to the output file
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if( cmFileFnWrite(dstPathFn,err->rpt,buf,byteCnt) != kOkFileRC )
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rc = cmErrMsg(err,kWriteFailFileRC,"An attempt to write a buffer to '%s' failed.",cmStringNullGuard(dstPathFn));
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}
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errLabel:
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// free the buffer
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cmMemFree(buf);
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cmFsFreeFn(srcPathFn);
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cmFsFreeFn(dstPathFn);
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return rc;
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}
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cmFileRC_t cmFileBackup( const cmChar_t* dir, const cmChar_t* name, const cmChar_t* ext, cmErr_t* err )
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{
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cmFileRC_t rc = kOkFileRC;
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cmChar_t* newName = NULL;
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const cmChar_t* newFn = NULL;
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unsigned n = 0;
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const cmChar_t* srcFn = NULL;
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// form the name of the backup file
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if((srcFn = cmFsMakeFn(dir,name,ext,NULL)) == NULL )
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{
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rc = cmErrMsg(err,kFileSysFailFileRC,"Backup source file name formation failed.");
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goto errLabel;
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}
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// if the src file does not exist then there is nothing to do
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if( cmFsIsFile(srcFn) == false )
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return rc;
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// break the source file name up into dir/fn/ext.
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cmFileSysPathPart_t* pp = NULL;
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if((pp = cmFsPathParts(srcFn)) == NULL || pp->fnStr==NULL)
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{
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rc = cmErrMsg(err,kFileSysFailFileRC,"The file name '%s' could not be parsed into its parts.",cmStringNullGuard(srcFn));
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goto errLabel;
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}
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// iterate until a unique file name is found
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for(n=0; 1; ++n)
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{
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cmFsFreeFn(newFn);
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// generate a new file name
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newName = cmTsPrintfP(newName,"%s_%i",pp->fnStr,n);
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// form the new file name into a complete path
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if((newFn = cmFsMakeFn(pp->dirStr,newName,pp->extStr,NULL)) == NULL )
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{
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rc = cmErrMsg(err,kFileSysFailFileRC,"A backup file name could not be formed for the file '%s'.",cmStringNullGuard(newName));
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goto errLabel;
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}
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// if the new file name is not already in use ...
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if( cmFsIsFile(newFn) == false )
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{
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// .. then duplicate the file
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if((rc = cmFileCopy(srcFn,NULL,NULL,newFn,NULL,NULL,err)) != kOkFileRC )
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rc = cmErrMsg(err,rc,"The file '%s' could not be duplicated as '%s'.",cmStringNullGuard(srcFn),cmStringNullGuard(newFn));
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break;
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}
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}
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errLabel:
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cmFsFreeFn(srcFn);
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cmFsFreeFn(newFn);
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cmMemFree(newName);
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cmFsFreePathParts(pp);
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return rc;
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}
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cmChar_t* cmFileToBuf( cmFileH_t h, unsigned* bufByteCntPtr )
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cmChar_t* cmFileToBuf( cmFileH_t h, unsigned* bufByteCntPtr )
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{ return _cmFileToBuf(h,0,bufByteCntPtr); }
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{ return _cmFileToBuf(h,0,bufByteCntPtr); }
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26
cmFile.h
26
cmFile.h
@ -27,7 +27,9 @@ extern "C" {
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kHandleInvalidFileRC,
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kHandleInvalidFileRC,
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kStatFailFileRC,
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kStatFailFileRC,
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kBufAllocFailFileRC,
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kBufAllocFailFileRC,
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kBufTooSmallFileRC
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kBufTooSmallFileRC,
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kFileSysFailFileRC,
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};
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};
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typedef unsigned cmFileRC_t;
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typedef unsigned cmFileRC_t;
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@ -117,6 +119,28 @@ extern "C" {
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// 'rpt' is the report object to use for error reporting.
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// 'rpt' is the report object to use for error reporting.
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cmChar_t* cmFileFnToBuf( const cmChar_t* fn, cmRpt_t* rpt, unsigned* bufByteCntPtr );
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cmChar_t* cmFileFnToBuf( const cmChar_t* fn, cmRpt_t* rpt, unsigned* bufByteCntPtr );
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// Copy the file named in srcDir/srcFn/srcExt to a file named dstDir/dstFn/dstExt.
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// Note that srcExt/dstExt may be set to NULL if the file extension is included
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// in srcFn/dstFn. Likewise srcFn/dstFn may be set to NULL if the file name
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// is included in srcDir/dstDir.
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cmFileRC_t cmFileCopy(
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const cmChar_t* srcDir,
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const cmChar_t* srcFn,
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||||||
|
const cmChar_t* srcExt,
|
||||||
|
const cmChar_t* dstDir,
|
||||||
|
const cmChar_t* dstFn,
|
||||||
|
const cmChar_t* dstExt,
|
||||||
|
cmErr_t* err);
|
||||||
|
|
||||||
|
|
||||||
|
// This function creates a backup copy of the file 'fn' by duplicating it into
|
||||||
|
// a file named fn_#.ext where # is an integer which makes the file name unique.
|
||||||
|
// The integers chosen with zero and are incremented until an
|
||||||
|
// unused file name is found in the same directory as 'fn'.
|
||||||
|
// If the file identified by 'fn' is not found then the function returns quietly.
|
||||||
|
cmFileRC_t cmFileBackup( const cmChar_t* dir, const cmChar_t* name, const cmChar_t* ext, cmErr_t* err );
|
||||||
|
|
||||||
// Allocate and fill a zero terminated string from a file.
|
// Allocate and fill a zero terminated string from a file.
|
||||||
// Set *bufByteCntPtr to count of bytes read into the buffer.=
|
// Set *bufByteCntPtr to count of bytes read into the buffer.=
|
||||||
// (the buffer memory size is one byte larger to account for the terminating zero)
|
// (the buffer memory size is one byte larger to account for the terminating zero)
|
||||||
|
Loading…
Reference in New Issue
Block a user