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#include "muscle.h"
#include "textfile.h"
#include <errno.h>
TextFile::TextFile(const char szFileName[], bool bWrite)
{
FILE *ptrFile = 0;
if (bWrite)
{
if (0 == strcmp(szFileName, "-"))
ptrFile = stdout;
else
ptrFile = fopen(szFileName, "wb");
}
else
{
if (0 == strcmp(szFileName, "-"))
ptrFile = stdin;
else
ptrFile = fopen(szFileName, "rb");
}
if (0 == ptrFile)
Quit("Cannot open '%s' errno=%d\n", szFileName, errno);
Init(ptrFile, szFileName);
}
void TextFile::Init(FILE *ptrFile, const char *ptrFileName)
{
m_ptrFile = ptrFile;
m_ptrName = strdup(ptrFileName);
m_uLineNr = 1;
m_uColNr = 0;
m_bLastCharWasEOL = true;
m_cPushedBack = -1;
#if DEBUG
setbuf(m_ptrFile, 0);
#endif
}
TextFile::TextFile(FILE *ptrFile, const char *ptrFileName)
{
Init(ptrFile, "-");
}
TextFile::~TextFile()
{
if (m_ptrFile &&
m_ptrFile != stdin && m_ptrFile != stdout && m_ptrFile != stderr)
fclose(m_ptrFile);
free(m_ptrName);
}
// Get line from file.
// Return true if end-of-file, quit if line too long.
bool TextFile::GetLine(char szLine[], unsigned uBytes)
{
if (0 == uBytes)
Quit("TextFile::GetLine, buffer zero size");
int FillVal = 0; // suppress warning from gcc that I don't understand
memset(szLine, FillVal, (size_t) uBytes);
unsigned uBytesCopied = 0;
// Loop until end of line or end of file.
for (;;)
{
char c;
bool bEof = GetChar(c);
if (bEof)
return true;
if ('\r' == c)
continue;
if ('\n' == c)
return false;
if (uBytesCopied < uBytes - 1)
szLine[uBytesCopied++] = (char) c;
else
Quit("TextFile::GetLine: input buffer too small, line %u",
m_uLineNr);
}
}
// As GetLine, but trim leading and trailing blanks; skip empty lines
bool TextFile::GetTrimLine(char szLine[], unsigned uBytes)
{
if (uBytes == 0)
Quit("GetTrimLine");
for (;;)
{
bool bEOF = GetLine(szLine, uBytes);
if (bEOF)
return true;
TrimBlanks(szLine);
if (0 != szLine[0])
break;
}
return false;
}
void TextFile::Rewind()
{
fseek(m_ptrFile, 0, SEEK_SET);
m_uLineNr = 1;
m_bLastCharWasEOL = true;
}
void TextFile::PutChar(char c)
{
int i = fputc(c, m_ptrFile);
assert(i == c);
if ('\n' == c)
{
++m_uLineNr;
m_uColNr = 1;
}
else
++m_uColNr;
}
void TextFile::PutString(const char szLine[])
{
int iError = fputs(szLine, m_ptrFile);
assert(iError >= 0);
}
void TextFile::PutFormat(const char szFormat[], ...)
{
char szStr[4096];
va_list ArgList;
va_start(ArgList, szFormat);
vsprintf(szStr, szFormat, ArgList);
PutString(szStr);
}
void TextFile::GetLineX(char szLine[], unsigned uBytes)
{
if (uBytes == 0)
Quit("GetLineX");
bool bEof = GetLine(szLine, uBytes);
if (bEof)
Quit("end-of-file in GetLineX");
}
bool TextFile::GetToken(char szToken[], unsigned uBytes, const char szCharTokens[])
{
// Skip leading white space
char c;
for (;;)
{
bool bEof = GetChar(c);
if (bEof)
return true;
if (!isspace(c))
break;
}
// Check for special case single-character tokens
if (0 != strchr(szCharTokens, c))
{
assert(uBytes >= 2);
szToken[0] = c;
szToken[1] = 0;
return false;
}
// Loop until token terminated by white space, EOF or special
unsigned uBytesCopied = 0;
for (;;)
{
if (uBytesCopied < uBytes - 1)
szToken[uBytesCopied++] = c;
else
Quit("TextFile::GetToken: input buffer too small, line %u",
m_uLineNr);
bool bEof = GetChar(c);
if (bEof)
{
szToken[uBytesCopied] = 0;
return true;
}
// Check for special case single-character tokens
if (0 != strchr(szCharTokens, c))
{
PushBack(c);
assert(uBytesCopied > 0 && uBytesCopied < uBytes);
szToken[uBytesCopied] = 0;
return false;
}
if (isspace(c))
{
assert(uBytesCopied > 0 && uBytesCopied < uBytes);
szToken[uBytesCopied] = 0;
return false;
}
}
}
void TextFile::GetTokenX(char szToken[], unsigned uBytes, const char szCharTokens[])
{
bool bEof = GetToken(szToken, uBytes, szCharTokens);
if (bEof)
Quit("End-of-file in GetTokenX");
}
void TextFile::Skip()
{
for (;;)
{
char c;
bool bEof = GetChar(c);
if (bEof || '\n' == c)
return;
assert(isspace(c));
}
}
#ifdef _WIN32
TEXTFILEPOS TextFile::GetPos()
{
fpos_t p;
int i = fgetpos(m_ptrFile, &p);
assert(0 == i);
assert(p >= 0);
TEXTFILEPOS Pos;
Pos.uOffset = (unsigned) p;
Pos.uLineNr = m_uLineNr;
Pos.uColNr = m_uColNr;
return Pos;
}
void TextFile::SetPos(TEXTFILEPOS Pos)
{
fpos_t p = (fpos_t) Pos.uOffset;
int i = fsetpos(m_ptrFile, &p);
assert(0 == i);
m_uLineNr = Pos.uLineNr;
m_uColNr = Pos.uColNr;
}
#else
TEXTFILEPOS TextFile::GetPos()
{
TEXTFILEPOS Pos;
Pos.uOffset = ftell(m_ptrFile);
Pos.uLineNr = m_uLineNr;
Pos.uColNr = m_uColNr;
return Pos;
}
void TextFile::SetPos(TEXTFILEPOS Pos)
{
fseek(m_ptrFile, Pos.uOffset, SEEK_SET);
m_uLineNr = Pos.uLineNr;
m_uColNr = Pos.uColNr;
}
#endif
bool TextFile::GetChar(char &c)
{
if (-1 != m_cPushedBack)
{
c = (char) m_cPushedBack;
m_cPushedBack = -1;
return false;
}
int ic = fgetc(m_ptrFile);
if (ic < 0)
{
if (feof(m_ptrFile))
{
// Hack to fix up a non-empty text file that is missing
// and end-of-line character in the last line.
if (!m_bLastCharWasEOL && m_uLineNr > 0)
{
c = '\n';
m_bLastCharWasEOL = true;
return false;
}
return true;
}
Quit("TextFile::GetChar, error %s", strerror(errno));
}
c = (char) ic;
if ('\n' == c)
{
m_bLastCharWasEOL = true;
++m_uLineNr;
m_uColNr = 1;
}
else
{
m_bLastCharWasEOL = false;
++m_uColNr;
}
return false;
}
void TextFile::GetCharX(char &c)
{
bool bEof = GetChar(c);
if (bEof)
Quit("End-of-file in GetCharX");
}
void TextFile::GetNonblankChar(char &c)
{
do
{
bool bEof = GetChar(c);
if (bEof)
Quit("End-of-file in GetCharX");
}
while (isspace(c));
}
void TextFile::SkipLine()
{
if (m_bLastCharWasEOL)
return;
for (;;)
{
char c;
bool bEof = GetChar(c);
if (bEof)
Quit("End-of-file in SkipLine");
if ('\n' == c)
break;
}
}
void TextFile::SkipWhite()
{
bool bEof = SkipWhiteX();
if (bEof)
Quit("End-of-file skipping white space");
}
bool TextFile::SkipWhiteX()
{
for (;;)
{
char c;
bool bEof = GetChar(c);
if (bEof)
return true;
if (!isspace(c))
{
PushBack(c);
break;
}
}
return false;
}
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