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/*
* COMMCONV.C
* Change C++ -comments to C-comments
*
* Public domain by Jari Laaksonen (2:221/105.11), 22 Dec 1992
*/
#include <stdio.h>
int main (int argc, char **argv)
{
int Char, cpp_comment = 0, c_comment = 0, in_string = 0;
char CannotOpen[] = "\nCannot open %s\n\n";
FILE *InFile, *OutFile = stdout;
if (argc < 2)
{
fprintf (stderr, "USAGE: COMMCONV InFile [OutFile]\n");
return (1);
}
if ((InFile = fopen (argv[1], "r")) == NULL)
{
fprintf (stderr, CannotOpen, argv[1]);
return (3);
}
if (argc == 3)
{
if ((OutFile = fopen (argv[2], "w")) == NULL)
{
fprintf (stderr, CannotOpen, argv[2]);
OutFile = stdout; /* if can't open, output goes to stdout instead */
}
}
while ((Char = fgetc (InFile)) != EOF)
{
fputc (Char, OutFile);
if (Char == '\"')
in_string = ! in_string; /* toggle flag */
if (in_string) /* we are in a string now */
continue;
if (Char == '/') /* slash */
{
Char = fgetc (InFile); /* check next char */
if (Char == '/') /* is it start of C++ comment */
{
Char = '*'; /* change it to C comment */
cpp_comment = 1;
}
else if (Char == '*') /* is it start of C comment */
c_comment = 1;
fputc (Char, OutFile);
if (c_comment || cpp_comment) /* inside C or C++ comment */
{
while ((Char = fgetc (InFile)) != '\n') /* rest of the line */
{
if (Char == '*' && c_comment)
{
int Ch = fgetc (InFile); /* check next char */
if (Ch == '/') /* is it end of C comment */
c_comment = 0;
ungetc (Ch, InFile); /* put it back to stream */
}
fputc (Char, OutFile);
}
if (cpp_comment)
{
fputs (" *", OutFile); /* put ending C comment mark */
if (c_comment)
fputc (' ', OutFile);
fputc ('/', OutFile);
cpp_comment = 0;
}
fputc ('\n', OutFile);
}
}
else if (Char == '*' && c_comment)
{
Char = fgetc (InFile);
if (Char == '/') /* is it end of C comment */
c_comment = 0;
fputc (Char, OutFile);
}
} /* while end */
if (argc == 3)
fclose (OutFile);
fclose (InFile);
return 0;
}
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