genericopenlibs/cstdlib/TSTLIB/THELLOU.C
changeset 0 e4d67989cc36
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/genericopenlibs/cstdlib/TSTLIB/THELLOU.C	Tue Feb 02 02:01:42 2010 +0200
@@ -0,0 +1,228 @@
+/*
+* Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:
+* A variant of "Hello World" which reports various bits of its environment
+* and returns an interesting exit status
+* 
+*
+*/
+
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/wait.h>
+#include "CTEST.H"
+
+#ifdef __WINS__
+int triangle_recurse(char* prog, char* num, int progress)
+	{
+	printf("\nBut not under WINS where I'll be told 0\n");
+	return 0;
+	}
+
+int triangle_parallel(char* prog, char* num)
+	{
+	printf("\nBut not under WINS where I'll be told 0\n");
+	return 0;
+	}
+
+#else
+
+int triangle_recurse(char* prog, char* num, int progress)
+	{
+	int n;
+	int pid, ret;
+	char cmd[100];
+	int fids[3];
+
+	n = atol(num);
+	if (n<1)
+		return 0;
+
+	sprintf(cmd, "%s do_triangle %d", prog, n-1);
+	if (progress)
+		{
+		pid=popen3(cmd, "", 0, fids);
+		if (pid<0)
+			{
+			fprintf(stderr, "Executing %s, ", cmd);
+			perror("popen3 failed");
+			return -1999999;
+			}
+		while (1)
+			{
+			int n=waitpid(pid, &ret, WNOHANG);
+			if (n==pid)
+				break;
+			printf(".");
+			fflush(stdout);
+			sleep(1);
+			}
+		}
+	else
+		ret=system(cmd);
+	return n+ret;
+	}
+
+int triangle_parallel(char* prog, char* num)
+	{
+	int n;
+	int pid, pid1, pid2, ret1, ret2, base, split;
+	char cmd[100];
+	int fids1[3], fids2[3];
+	char* basep;
+
+	n = atol(num);
+	if (n<1)
+		return 0;
+	basep=getenv("TRIANGLE_BASE");
+	if (basep==0)
+		return 0;
+	base=atol(basep);
+
+	/* we have to add up the numbers base..n inclusive
+	 */
+	if (base==n)
+		return n;
+	if (base+1==n)
+		return base+n;
+
+	/* At least 3 numbers, so split it into subtasks for child processes
+	 */
+	split = (n-base)/2;
+
+	sprintf(cmd, "%s do_trianglep %d", prog, base+split);
+	pid1=popen3(cmd, "", 0, fids1);
+	if (pid1<0)
+		{
+		fprintf(stderr, "Doing %d..%d of %d..%d", base+split, base, n, base);
+		perror("popen3 failed");
+		return -1999999;
+		}
+	
+	sprintf(cmd, "%d", base+split+1);
+	setenv("TRIANGLE_BASE", cmd, 1);
+
+	sprintf(cmd, "%s do_trianglep %d", prog, n);
+	pid2=popen3(cmd, "", 0, fids2);
+	if (pid2<0)
+		{
+		fprintf(stderr, "Doing %d..%d of %d..%d", n, base+split+1, n, base);
+		perror("popen3 failed");
+		return -1999999;
+		}
+	
+	/* Now collect the results */
+	ret1=-10000;
+	ret2=-10000;
+	for (n=0; n<2; n++)
+		{
+		int ret=-3999999;
+		pid=wait(&ret);
+		if (pid<0)
+			{
+			perror("waitpid failed");
+			return -2999999;
+			}
+		if (pid==pid1)
+			{
+			pid1=-1;
+			ret1=ret;
+			}
+		else if (pid==pid2)
+			{
+			pid2=-1;
+			ret2=ret;
+			}
+		else
+			printf("Unexpected pid %d (not %d or %d)\n", pid, pid1, pid2);
+		}
+	return ret1+ret2;
+	}
+
+#endif
+
+/**
+Usage:  THELLOU [triangle[p] <n>]
+
+@SYMTestCaseID          SYSLIB-STDLIB-CT-1058
+@SYMTestCaseDesc	    Tests for printing to standard output stream
+@SYMTestPriority 	    High
+@SYMTestActions  	    Prints some stuff (looks at args, getenv("USER"), cwd) to stdout and stderr.
+						Will compute triangle numbers by calling itself recursively, or parallel subdivison
+@SYMTestExpectedResults Test must not fail
+@SYMREQ                 REQ0000
+*/		
+int main (int argc, char *argv[])
+	{
+	char *user=getenv("USER");
+	char cwd[MAXPATHLEN];
+	int ret=3, i;
+
+	start_redirection_server();
+	
+	if (argc==3 && strcmp(argv[1],"do_triangle")==0)
+		return triangle_recurse(argv[0], argv[2], 0);
+
+	if (argc==3 && strcmp(argv[1],"do_trianglep")==0)
+		return triangle_parallel(argv[0], argv[2]);
+
+	if (user)
+		{
+		printf("Hello %s\n", user);
+		ret=4;
+		}
+	else
+		printf("Greetings.\n");
+
+	printf("I am process %d\n", getpid());
+
+	if (getcwd(cwd,sizeof(cwd))!=0)
+		printf("I am speaking to you from %s\n", cwd);
+
+	printf("I have %d arguments: ", argc);
+	for (i=0; i<argc; i++)
+		printf(">%s< ", argv[i]);
+	printf("\r\n");
+
+	printf("In a few moments I shall say %c to stderr:\n", 'a'+argc);
+	fflush(stdout);
+
+	fprintf(stderr, "%c\n", 'a'+argc);
+	fflush(stderr);
+
+	if (argc==3 && strcmp(argv[1],"triangle")==0)
+		{
+		printf("For my next trick I shall compute the triangle of %s: ", argv[2]);
+		fflush(stdout);
+		ret=triangle_recurse(argv[0], argv[2], 1);
+		printf("it's %d\n", ret);
+		}
+
+	if (argc==3 && strcmp(argv[1],"trianglep")==0)
+		{
+		printf("I shall now compute the triangle of %s using a parallel algorithm: ", argv[2]);
+		fflush(stdout);
+		setenv("TRIANGLE_BASE", "1", 0);
+		ret=triangle_parallel(argv[0], argv[2]);
+		printf("it's %d\n", ret);
+		}
+
+	printf("Farewell...\nPress a key");
+	getchar();
+	return ret;
+	}