Add back TypEr to the main OTP repository

It turned out that the dependencies between Dialyzer
and TypEr makes it impractical to have TypEr in a
separate repository.

Add it back to the OTP repository, but put the Erlang
module 'typer' in the dialyzer application.

2 files changed, 464 insertions, 2 deletions

diff --git a/erts/etc/common/Makefile.in b/erts/etc/common/Makefile.in
index d3af634729..7634583462 100644
--- a/erts/etc/common/Makefile.in
+++ b/erts/etc/common/Makefile.in
@@ -143,7 +143,7 @@ MC_OUTPUTS=$(OBJDIR)/erlsrv_logmess.h $(OBJDIR)/erlsrv_logmess.res
 MT_FLAG="-MD"
 endif
 INET_GETHOST = $(BINDIR)/inet_gethost.exe
-INSTALL_EMBEDDED_PROGS += $(BINDIR)/dialyzer.exe $(BINDIR)/erlc.exe $(BINDIR)/start_erl.exe $(BINDIR)/escript.exe $(BINDIR)/ct_run.exe
+INSTALL_EMBEDDED_PROGS += $(BINDIR)/typer.exe $(BINDIR)/dialyzer.exe $(BINDIR)/erlc.exe $(BINDIR)/start_erl.exe $(BINDIR)/escript.exe $(BINDIR)/ct_run.exe
 INSTALL_SRC = $(WINETC)/start_erl.c $(WINETC)/Nmakefile.start_erl
 ERLEXECDIR=.
 INSTALL_LIBS =
@@ -176,7 +176,7 @@ ENTRY_OBJ=
 ERLSRV_OBJECTS= 
 MC_OUTPUTS=
 INET_GETHOST = $(BINDIR)/inet_gethost@EXEEXT@
-INSTALL_EMBEDDED_PROGS += $(BINDIR)/dialyzer@EXEEXT@ \
+INSTALL_EMBEDDED_PROGS += $(BINDIR)/typer@EXEEXT@ $(BINDIR)/dialyzer@EXEEXT@ \
  $(BINDIR)/erlc@EXEEXT@ $(BINDIR)/escript@EXEEXT@ $(BINDIR)/ct_run@EXEEXT@ \
  $(BINDIR)/run_erl $(BINDIR)/to_erl $(BINDIR)/dyn_erl
 INSTALL_EMBEDDED_DATA = $(UXETC)/start.src $(UXETC)/start_erl.src
@@ -238,6 +238,7 @@ endif
 	rm -f $(ERL_TOP)/erts/obj*/$(TARGET)/reclaim.o
 	rm -f $(ERL_TOP)/erts/obj*/$(TARGET)/run_erl.o
 	rm -f $(ERL_TOP)/erts/obj*/$(TARGET)/to_erl.o
+	rm -f $(ERL_TOP)/erts/obj*/$(TARGET)/typer.o
 	rm -f $(ERL_TOP)/erts/obj*/$(TARGET)/dyn_erl.o
 	rm -f $(ERL_TOP)/erts/obj*/$(TARGET)/safe_string.o
 	rm -f $(ERL_TOP)/erts/obj*/$(TARGET)/run_erl.o
@@ -432,6 +433,12 @@ $(BINDIR)/dialyzer@EXEEXT@: $(OBJDIR)/dialyzer.o $(ERTS_LIB)
 $(OBJDIR)/dialyzer.o: dialyzer.c $(RC_GENERATED)
 	$(V_CC) $(CFLAGS) -o $@ -c dialyzer.c
 
+$(BINDIR)/typer@EXEEXT@: $(OBJDIR)/typer.o $(ERTS_LIB)
+	$(ld_verbose)$(PURIFY) $(LD) $(LDFLAGS) -o $@ $(OBJDIR)/typer.o -L$(OBJDIR) $(LIBS) $(ERTS_INTERNAL_LIBS)
+
+$(OBJDIR)/typer.o: typer.c $(RC_GENERATED)
+	$(V_CC) $(CFLAGS) -o $@ -c typer.c
+
 $(BINDIR)/escript@EXEEXT@: $(OBJDIR)/escript.o $(ERTS_LIB)
 	$(ld_verbose)$(PURIFY) $(LD) $(LDFLAGS) -o $@ $(OBJDIR)/escript.o -L$(OBJDIR) $(LIBS) $(ERTS_INTERNAL_LIBS)
 
diff --git a/erts/etc/common/typer.c b/erts/etc/common/typer.c
new file mode 100644
index 0000000000..77a95ccded
--- /dev/null
+++ b/erts/etc/common/typer.c
@@ -0,0 +1,455 @@
+/*
+ * %CopyrightBegin%
+ * 
+ * Copyright Ericsson AB 2006-2016. All Rights Reserved.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * 
+ * %CopyrightEnd%
+ */
+/*
+ * Purpose: Typer front-end.
+ */
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include "sys.h"
+#ifdef __WIN32__
+#include <winbase.h>
+#endif
+
+#include <ctype.h>
+
+#define NO 0
+#define YES 1
+
+#define ASIZE(a) (sizeof(a)/sizeof(a[0]))
+
+static int debug = 0;		/* Bit flags for debug printouts. */
+
+static char** eargv_base;	/* Base of vector. */
+static char** eargv;		/* First argument for erl. */
+
+static int eargc;		/* Number of arguments in eargv. */
+
+#ifdef __WIN32__
+#  define QUOTE(s) possibly_quote(s)
+#  define IS_DIRSEP(c) ((c) == '/' || (c) == '\\')
+#  define ERL_NAME "erl.exe"
+#else
+#  define QUOTE(s) s
+#  define IS_DIRSEP(c) ((c) == '/')
+#  define ERL_NAME "erl"
+#endif
+
+#define UNSHIFT(s) eargc++, eargv--; eargv[0] = QUOTE(s)
+#define PUSH(s) eargv[eargc++] = QUOTE(s)
+#define PUSH2(s, t) PUSH(s); PUSH(t)
+#define PUSH3(s, t, u) PUSH2(s, t); PUSH(u)
+
+/*
+ * Local functions.
+ */
+
+static void error(char* format, ...);
+static void* emalloc(size_t size);
+static char* strsave(char* string);
+static void push_words(char* src);
+static int run_erlang(char* name, char** argv);
+static char* get_default_emulator(char* progname);
+#ifdef __WIN32__
+static char* possibly_quote(char* arg);
+static void* erealloc(void *p, size_t size);
+#endif
+
+/*
+ * Supply a strerror() function if libc doesn't.
+ */
+#ifndef HAVE_STRERROR
+
+extern int sys_nerr;
+
+#ifndef SYS_ERRLIST_DECLARED
+extern const char * const sys_errlist[];
+#endif /* !SYS_ERRLIST_DECLARED */
+
+char *strerror(int errnum)
+{
+  static char *emsg[1024];
+
+  if (errnum != 0) {
+    if (errnum > 0 && errnum < sys_nerr) 
+      sprintf((char *) &emsg[0], "(%s)", sys_errlist[errnum]);
+    else 
+      sprintf((char *) &emsg[0], "errnum = %d ", errnum);
+  }
+  else {
+    emsg[0] = '\0';
+  }
+  return (char *) &emsg[0];
+}
+#endif /* !HAVE_STRERROR */
+
+#ifdef __WIN32__
+int wmain(int argc, wchar_t **wcargv)
+{
+    char** argv;
+#else
+int
+main(int argc, char** argv)
+{
+#endif
+    int eargv_size;
+    int eargc_base;		/* How many arguments in the base of eargv. */
+    char* emulator;
+    int need_shell = 0;
+
+#ifdef __WIN32__
+    int i;
+    int len;
+    /* Convert argv to utf8 */
+    argv = emalloc((argc+1) * sizeof(char*));
+    for (i=0; i<argc; i++) {
+	len = WideCharToMultiByte(CP_UTF8, 0, wcargv[i], -1, NULL, 0, NULL, NULL);
+	argv[i] = emalloc(len*sizeof(char));
+	WideCharToMultiByte(CP_UTF8, 0, wcargv[i], -1, argv[i], len, NULL, NULL);
+    }
+    argv[argc] = NULL;
+#endif
+
+    emulator = get_default_emulator(argv[0]);
+
+    /*
+     * Allocate the argv vector to be used for arguments to Erlang.
+     * Arrange for starting to pushing information in the middle of
+     * the array, to allow easy addition of commands in the beginning.
+     */
+
+    eargv_size = argc*4+100;
+    eargv_base = (char **) emalloc(eargv_size*sizeof(char*));
+    eargv = eargv_base;
+    eargc = 0;
+    push_words(emulator);
+    eargc_base = eargc;
+    eargv = eargv + eargv_size/2;
+    eargc = 0;
+
+    /*
+     * Push initial arguments.
+     */
+
+    if (argc > 1 && strcmp(argv[1], "-smp") == 0) {
+        PUSH("-smpauto");
+	argc--, argv++;
+    }
+
+    PUSH("+B");
+    PUSH2("-boot", "start_clean");
+    PUSH3("-run", "typer", "start");
+    PUSH("-extra");
+
+    /*
+     * Push everything except --shell.
+     */
+
+    while (argc > 1) {
+	if (strcmp(argv[1], "--shell") == 0) {
+	    need_shell = 1;
+	} else {
+	    PUSH(argv[1]);
+	}
+	argc--, argv++;
+    }
+
+    if (!need_shell) {
+	UNSHIFT("-noinput");
+    }
+
+    /*
+     * Move up the commands for invoking the emulator and adjust eargv
+     * accordingly.
+     */
+
+    while (--eargc_base >= 0) {
+	UNSHIFT(eargv_base[eargc_base]);
+    }
+    
+    /*
+     * Invoke Erlang with the collected options.
+     */
+
+    PUSH(NULL);
+    return run_erlang(eargv[0], eargv);
+}
+
+static void
+push_words(char* src)
+{
+    char sbuf[MAXPATHLEN];
+    char* dst;
+
+    dst = sbuf;
+    while ((*dst++ = *src++) != '\0') {
+	if (isspace((int)*src)) {
+	    *dst = '\0';
+	    PUSH(strsave(sbuf));
+	    dst = sbuf;
+	    do {
+		src++;
+	    } while (isspace((int)*src));
+	}
+    }
+    if (sbuf[0])
+	PUSH(strsave(sbuf));
+}
+#ifdef __WIN32__
+wchar_t *make_commandline(char **argv)
+{
+    static wchar_t *buff = NULL;
+    static int siz = 0;
+    int num = 0, len;
+    char **arg;
+    wchar_t *p;
+
+    if (*argv == NULL) { 
+	return L"";
+    }
+    for (arg = argv; *arg != NULL; ++arg) {
+	num += strlen(*arg)+1;
+    }
+    if (!siz) {
+	siz = num;
+	buff = (wchar_t *) emalloc(siz*sizeof(wchar_t));
+    } else if (siz < num) {
+	siz = num;
+	buff = (wchar_t *) erealloc(buff,siz*sizeof(wchar_t));
+    }
+    p = buff;
+    num=0;
+    for (arg = argv; *arg != NULL; ++arg) {
+	len = MultiByteToWideChar(CP_UTF8, 0, *arg, -1, p, siz);
+	p+=(len-1);
+	*p++=L' ';
+    }
+    *(--p) = L'\0';
+
+    if (debug) {
+	printf("Processed command line:%S\n",buff);
+    }
+    return buff;
+}
+
+int my_spawnvp(char **argv)
+{
+    STARTUPINFOW siStartInfo;
+    PROCESS_INFORMATION piProcInfo;
+    DWORD ec;
+
+    memset(&siStartInfo,0,sizeof(STARTUPINFOW));
+    siStartInfo.cb = sizeof(STARTUPINFOW); 
+    siStartInfo.dwFlags = STARTF_USESTDHANDLES;
+    siStartInfo.hStdInput = GetStdHandle(STD_INPUT_HANDLE);
+    siStartInfo.hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE);
+    siStartInfo.hStdError = GetStdHandle(STD_ERROR_HANDLE);
+
+    if (!CreateProcessW(NULL, 
+			make_commandline(argv),
+			NULL, 
+			NULL, 
+			TRUE, 
+			0,
+			NULL, 
+			NULL, 
+			&siStartInfo, 
+			&piProcInfo)) {
+	return -1;
+    }
+    CloseHandle(piProcInfo.hThread);
+
+    WaitForSingleObject(piProcInfo.hProcess,INFINITE);
+    if (!GetExitCodeProcess(piProcInfo.hProcess,&ec)) {
+	return 0;
+    }
+    return (int) ec;
+}    
+#endif /* __WIN32__ */
+
+
+static int
+run_erlang(char* progname, char** argv)
+{
+#ifdef __WIN32__
+    int status;
+#endif
+
+    if (debug) {
+	int i = 0;
+	while (argv[i] != NULL)
+	    printf(" %s", argv[i++]);
+	printf("\n");
+    }
+
+#ifdef __WIN32__
+    /*
+     * Alas, we must wait here for the program to finish.
+     * Otherwise, the shell from which we were executed will think
+     * we are finished and print a prompt and read keyboard input.
+     */
+
+    status = my_spawnvp(argv)/*_spawnvp(_P_WAIT,progname,argv)*/;
+    if (status == -1) {
+	fprintf(stderr, "typer: Error executing '%s': %d", progname, 
+		GetLastError());
+    }
+    return status;
+#else
+    execvp(progname, argv);
+    error("Error %d executing \'%s\'.", errno, progname);
+    return 2;
+#endif
+}
+
+static void
+error(char* format, ...)
+{
+    char sbuf[1024];
+    va_list ap;
+    
+    va_start(ap, format);
+    erts_vsnprintf(sbuf, sizeof(sbuf), format, ap);
+    va_end(ap);
+    fprintf(stderr, "typer: %s\n", sbuf);
+    exit(1);
+}
+
+static void*
+emalloc(size_t size)
+{
+  void *p = malloc(size);
+  if (p == NULL)
+    error("Insufficient memory");
+  return p;
+}
+
+#ifdef __WIN32__
+static void *
+erealloc(void *p, size_t size)
+{
+    void *res = realloc(p, size);
+    if (res == NULL)
+    error("Insufficient memory");
+    return res;
+}
+#endif
+
+static char*
+strsave(char* string)
+{
+    char* p = emalloc(strlen(string)+1);
+    strcpy(p, string);
+    return p;
+}
+
+static int 
+file_exists(char *progname) 
+{
+#ifdef __WIN32__
+    wchar_t wcsbuf[MAXPATHLEN];
+    MultiByteToWideChar(CP_UTF8, 0, progname, -1, wcsbuf, MAXPATHLEN);
+    return (_waccess(wcsbuf, 0) != -1);
+#else
+    return (access(progname, 1) != -1);
+#endif
+}
+
+static char*
+get_default_emulator(char* progname)
+{
+    char sbuf[MAXPATHLEN];
+    char* s;
+
+    if (strlen(progname) >= sizeof(sbuf))
+        return ERL_NAME;
+
+    strcpy(sbuf, progname);
+    for (s = sbuf+strlen(sbuf); s >= sbuf; s--) {
+	if (IS_DIRSEP(*s)) {
+	    strcpy(s+1, ERL_NAME);
+	    if(file_exists(sbuf))
+		return strsave(sbuf);
+	    break;
+	}
+    }
+    return ERL_NAME;
+}
+
+#ifdef __WIN32__
+static char*
+possibly_quote(char* arg)
+{
+    int mustQuote = NO;
+    int n = 0;
+    char* s;
+    char* narg;
+
+    if (arg == NULL) {
+	return arg;
+    }
+
+    /*
+     * Scan the string to find out if it needs quoting and return
+     * the original argument if not.
+     */
+
+    for (s = arg; *s; s++, n++) {
+	switch(*s) {
+	case ' ':
+	    mustQuote = YES;
+	    continue;
+	case '"':
+	    mustQuote = YES;
+	    n++;
+	    continue;
+	case '\\':
+	    if(s[1] == '"')
+		n++;
+	    continue;
+	default:
+	    continue;
+	}
+    }
+    if (!mustQuote) {
+	return arg;
+    }
+
+    /*
+     * Insert the quotes and put a backslash in front of every quote
+     * inside the string.
+     */
+
+    s = narg = emalloc(n+2+1);
+    for (*s++ = '"'; *arg; arg++, s++) {
+	if (*arg == '"' || (*arg == '\\' && arg[1] == '"')) {
+	    *s++ = '\\';
+	}
+	*s = *arg;
+    }
+    if (s[-1] == '\\') {
+	*s++ ='\\';
+    }
+    *s++ = '"';
+    *s = '\0';
+    return narg;
+}
+#endif /* __WIN32__ */