This is my build script at this point:
~/emscripten/emscripten/emcc main.cpp game.cpp ShootingScreen.cpp drawing.cpp mainmenu.cpp -o /var/www/html/archery.html -s EXPORTED_FUNCTIONS="['_imageloaded','_main']"~/utils/htmljoin /var/www/html/archery.html javascript /var/www/html/archery2.html
The text in red, takes my emscripten output, archery.html and javascript and combines it into one file archery2.html. The contents in javascript file are inserted before the <body> tag.
My javascript file
Code to htmljoin utility
Save what is below to htmljoin.cpp and run "gcc htmljoin.cpp -o htmljoin" to compile this code. It's that simple!#include <cstdio>
#include <cstdlib>
#include <cstring>
int getFileSize( FILE * file )
{
fseek (file , 0 , SEEK_END);
int size = ftell (file);
rewind (file);
return size;
}
char * readContentsFromFile( char * filePath )
{
FILE * file = fopen( filePath, "r" );
if ( file == NULL )
{
printf( "ERROR: could not load file \"%s\"\n", filePath );
return NULL;
}
int size = getFileSize( file );
char * buffer = (char*) malloc (sizeof(char)*size + 1);
if (buffer == NULL)
{
printf("ERROR: error allocating memory for reading the file\n");
fclose( file );
return NULL;
}
printf( "reading %s file, %d bytes\n", filePath, size );
// copy the file into the buffer:
int result = fread( buffer, 1, size, file );
buffer[size] = '\0';
fclose( file );
if (result != size)
{
printf("ERROR: error reading the contents of the file\n");
free( buffer );
return NULL;
}
return buffer;
}
void CreateJoinedFile( char * emscriptenHtmlFileData, char * joinHtmlFileData, FILE * outputHtmlFilePath )
{
//find where body is in the string
char * bodyLocation = strstr( emscriptenHtmlFileData, "<body>" );
if ( bodyLocation == NULL )
{
printf( "ERROR: could not find the <body> tag\n" );
return;
}
printf( "writing first piece of emscripten file...\n" );
size_t toWrite = bodyLocation - emscriptenHtmlFileData;
fwrite( emscriptenHtmlFileData, 1, toWrite, outputHtmlFilePath );
printf( "joining files...\n" );
//insert the code
int lengthJoin = strlen( joinHtmlFileData );
fwrite( joinHtmlFileData, 1, lengthJoin, outputHtmlFilePath );
printf( "writing last piece of emscripten file...\n" );
int bodyLength = strlen( bodyLocation );
fwrite ( bodyLocation, 1, bodyLength, outputHtmlFilePath );
}
int main( int argc, char *argv[] )
{
char emscriptenHtmlFilePath[500], joinHtmlFilePath[500], outputHtmlFilePath[500];
if ( argc < 4 )
{
printf( "you can run this program via command line with three arguments:\n" );
printf( "arg 1 - emscripten html file\n");
printf( "arg 2 - html file to join\n");
printf( "arg 3 - output html file\n");
printf( "please enter these arguments manually\n" );
printf( "emscripten html file: " );
gets( emscriptenHtmlFilePath );
printf( "html file to join: " );
gets( joinHtmlFilePath );
printf( "output html file: " );
gets( outputHtmlFilePath );
}
else
{
strcpy( emscriptenHtmlFilePath, argv[1] );
strcpy( joinHtmlFilePath, argv[2] );
strcpy( outputHtmlFilePath, argv[3] );
}
///////////////////////////////////////
// merge the files here
char * emscriptenHtmlFileData = NULL, * joinHtmlFileData = NULL, * outputHtmlFileData = NULL;
FILE * outputHtmlFile = NULL;
emscriptenHtmlFileData = readContentsFromFile( emscriptenHtmlFilePath );
if ( emscriptenHtmlFileData == NULL )
goto cleanup;
joinHtmlFileData = readContentsFromFile( joinHtmlFilePath );
if ( joinHtmlFileData == NULL )
goto cleanup;
printf( "opening the file to write to...\n" );
//open the file for writing
outputHtmlFile = fopen( outputHtmlFilePath, "w+" );
if ( outputHtmlFile == NULL )
{
printf( "ERROR: could not load file \"%s\"\n", outputHtmlFilePath );
goto cleanup;
}
printf( "Creating joined file...\n" );
CreateJoinedFile( emscriptenHtmlFileData, joinHtmlFileData, outputHtmlFile );
cleanup:
if ( outputHtmlFile != NULL )
fclose( outputHtmlFile );
free( emscriptenHtmlFileData );
free( joinHtmlFileData );
free( outputHtmlFileData );
return 0;
}
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