- Makefile, kernel/posix_compatibility.h/.cc: replay isolated OSX/POSIX.2008 compatibility patch.

2 files changed, 174 insertions, 0 deletions

diff --git a/kernel/posix_compatibility.cc b/kernel/posix_compatibility.cc
new file mode 100644
index 000000000..d3fb00873
--- /dev/null
+++ b/kernel/posix_compatibility.cc
@@ -0,0 +1,134 @@
+/*
+ *  yosys -- Yosys Open SYnthesis Suite
+ *
+ *  Copyright (C) 2012  Clifford Wolf <clifford@clifford.at>
+ *  
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *  
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+/**
+ *  POSIX.2008 fake implementation for pre-POSIX.2008 systems. (OSX, BSD, MINGW, CYGWIN, older Linux &c.)
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#if !(_XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L)
+typedef struct memstream {
+	off_t pos;
+	off_t size;
+	char * buffer;
+	char ** bufp;
+	size_t * sizep;
+	bool realloc;
+} memstream_t;
+
+static int memstream_read (void * cookie, char * buf, int size)
+{
+	memstream_t * mem = (memstream_t *) cookie;
+	off_t available = mem->size - mem->pos;
+	if (available < 0)
+		available = 0;
+	if (size > available)
+		size = available;
+	memcpy(buf, mem->buffer + mem->pos, size);
+	mem->pos += size;
+	return size;
+}
+
+static int memstream_write (void * cookie, const char * buf, int size)
+{
+	memstream_t * mem = (memstream_t *) cookie;
+	off_t available = mem->size - mem->pos;
+	if (size > available) {
+		if (mem->realloc) {
+			mem->buffer = (char *) realloc(mem->buffer, mem->pos + size + 1);
+			memset(mem->buffer + mem->size, 0, mem->pos + size + 1 - mem->size);
+			mem->size = mem->pos + size;
+			if (mem->bufp)
+				*(mem->bufp) = mem->buffer;
+			if (mem->sizep)
+				*(mem->sizep) = mem->size;
+		} else {
+			size = available;
+		}
+	}
+	memcpy(mem->buffer + mem->pos, buf, sizeof(char) * size);
+	mem->pos += size;
+	return size;
+}
+
+static fpos_t memstream_seek (void * cookie, fpos_t offset, int whence)
+{
+	memstream_t * mem = (memstream_t *) cookie;
+	switch (whence) {
+	case SEEK_SET:
+		if (offset < 0)
+			goto error_inval;
+		mem->pos = offset;
+		return 0;
+	case SEEK_CUR:
+		if (mem->pos + offset < 0)
+			goto error_inval;
+		mem->pos += offset;
+		return 0;
+	case SEEK_END:
+		if (mem->size + offset < 0)
+			goto error_inval;
+		mem->pos = mem->size + offset;
+		break;
+	default:
+		goto error_inval;
+	}
+	return mem->pos;
+error_inval:
+	errno = EINVAL;
+	return -1;
+}
+
+static int memstream_close (void * cookie)
+{
+	memstream_t * mem = (memstream_t *) cookie;
+	if (mem->bufp)
+		*(mem->bufp) = mem->buffer;
+	if (mem->sizep)
+		*(mem->sizep) = mem->size;
+	free(cookie);
+	return 0;
+}
+
+FILE * fmemopen (void * buf, size_t size, const char * mode)
+{
+	memstream_t * mem = (memstream_t *) malloc(sizeof(memstream_t));
+	memset(mem, 0, sizeof(memstream_t));
+	mem->size = size;
+	mem->buffer = (char *) buf;
+	(void) mode;
+	return funopen(mem, memstream_read, memstream_write, memstream_seek, memstream_close);
+}
+
+FILE * open_memstream (char ** bufp, size_t * sizep)
+{
+	memstream_t * mem = (memstream_t *) malloc(sizeof(memstream_t));
+	memset(mem, 0, sizeof(memstream_t));
+	mem->bufp = bufp;
+	mem->sizep = sizep;
+	mem->realloc = true;
+	return funopen(mem, memstream_read, memstream_write, memstream_seek, memstream_close);
+}
+
+#endif
+
diff --git a/kernel/posix_compatibility.h b/kernel/posix_compatibility.h
new file mode 100644
index 000000000..ed8fc8966
--- /dev/null
+++ b/kernel/posix_compatibility.h
@@ -0,0 +1,40 @@
+/*
+ *  yosys -- Yosys Open SYnthesis Suite
+ *
+ *  Copyright (C) 2012  Clifford Wolf <clifford@clifford.at>
+ *  
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *  
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#ifndef POSIX_COMPATIBILITY_H
+#define POSIX_COMPATIBILITY_H
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+#if !(_XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L)
+#include <stdio.h>
+#include <stdlib.h>
+
+FILE * open_memstream (char ** bufp, size_t * sizep);
+FILE * fmemopen (void * buf, size_t size, const char * mode);
+#endif
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif
+