[cmucl-commit] [git] CMU Common Lisp branch master updated. snapshot-2012-08-7-g88d77e8
Raymond Toy
rtoy at common-lisp.net
Sun Aug 26 22:29:50 UTC 2012
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- Log -----------------------------------------------------------------
commit 88d77e83c17fd5d48be454542389d3ff71a27b4b
Author: Raymond Toy <toy.raymond at gmail.com>
Date: Sat Aug 25 08:48:51 2012 -0700
Change %primitive print.to output strings in utf8 instead of utf16.
No more random NUL ASCII characters on output now.
diff --git a/src/lisp/interr.c b/src/lisp/interr.c
index 57e18f2..90c7f7d 100644
--- a/src/lisp/interr.c
+++ b/src/lisp/interr.c
@@ -160,6 +160,152 @@ internal_error(os_context_t * context)
/* Utility routines used by random pieces of code. */
+#if defined(UNICODE)
+/*
+ * Convert a unicode code point to a set of utf8-encoded octets to
+ * standard output. This is the algorithm used by the Lisp utf8
+ * encoder in src/code/extfmts.lisp.
+ */
+static void
+utf8(int code, int len)
+{
+ int k;
+ int j = 6 - len;
+ int p = 6 * len;
+ int init = 0xff & (0x7e << j);
+ int c;
+
+ /*
+ * (ldb (byte j p) code): Extract j bits from position p of the code
+ */
+ c = (code >> p) & ((1 << j) - 1);
+
+ putchar(init | c);
+
+ for (k = 0; k < len; ++k) {
+ p -= 6;
+ /* (ldb (byte 6 p) code) */
+ c = (code >> p) & ((1 << 6) - 1);
+ putchar(128 | c);
+ }
+}
+
+/*
+ * Test if code is a surrogate. Returns true if so. If the code is a
+ * surrogate, then type indicates if it is a high (0) or low (1)
+ * surrogate. If not a surrogate, type is not modified. If type is
+ * NULL, then no type is returned.
+ */
+boolean
+surrogatep(int code, int *type)
+{
+ boolean result;
+
+ if ((code >> 11) == 0x1b) {
+ result = 1;
+ if (type) {
+ *type = (code >> 10) & 1;
+ }
+ } else {
+ result = 0;
+ }
+
+ return result;
+}
+
+/*
+ * Convert one or two utf16 code units into a code point. utf16
+ * points to the string, len is the length of the string. The
+ * codepoint is returned and the number of code units consumed is
+ * returned in consumed.
+ */
+int
+utf16_codepoint(unsigned short int* utf16, int len, int* consumed)
+{
+ int code = *utf16;
+ int read = 1;
+
+ int code_type;
+
+ /*
+ * If the current code unit is not a surrogate, we're done.
+ * Otherwise process the surrogate
+ */
+
+ if (surrogatep(code, &code_type)) {
+ /*
+ * Try to get the following surrogate, if there are still code
+ * units left. If not, we have a bare surrogate, so just
+ * return the replacement character.
+ */
+ if (len > 0) {
+ int next = utf16[1];
+ int next_type;
+ if (surrogatep(next, &next_type)) {
+ /* Got the following surrogate, so combine them if possible */
+ if ((code_type == 0) && (next_type == 1)) {
+ /* High followed by low surrogate */
+ code = ((code - 0xd800) << 10) + next + 0x2400;
+ ++read;
+ } else if ((code_type == 1) && (next_type == 0)) {
+ /* Low followed by high surrogate */
+ code = ((code - 0xd800) << 10) + next + 0x2400;;
+ ++read;
+ } else {
+ /* Give up */
+ code = 0xfffd;
+ }
+ } else {
+ /* Surrogate followed by non-surrogate. Give up */
+ code = 0xfffd;
+ }
+ } else {
+ code = 0xfffd;
+ }
+ }
+
+ *consumed = read;
+ return code;
+}
+
+/*
+ * Send the utf-16 Lisp unicode string to standard output as a
+ * utf8-encoded sequence of octets.
+ */
+static void
+utf16_output(unsigned short int* utf16, int len)
+{
+ while (len) {
+ int consumed;
+ int code = utf16_codepoint(utf16, len, &consumed);
+
+ /* Output the codepoint */
+ if (code < 0x80) {
+ putchar(code);
+ } else if (code < 0x800) {
+ utf8(code, 1);
+ } else if (code < 0x10000) {
+ utf8(code, 2);
+ } else if (code < 0x110000) {
+ utf8(code, 3);
+ } else {
+ /*
+ * This shouldn't happen, but if it does we don't want to
+ * signal any kind of error so just output a question mark
+ * so we can continue.
+ */
+ putchar('?');
+ }
+
+ len -= consumed;
+ utf16 += consumed;
+ }
+}
+#endif
+
+/*
+ * debug_print is used by %primitive print to output a string.
+ */
lispobj
debug_print(lispobj object)
{
@@ -178,13 +324,7 @@ debug_print(lispobj object)
len = lisp_string->length >> 2;
lisp_chars = (unsigned short int*) lisp_string->data;
- /*
- * Do we really want to dump out the entire contents of
- * the utf-16 string? Should we just print out the low 8
- * bits of each Lisp character? Or maybe convert the
- * utf-16 string to some more suitable encoding?
- */
- fwrite(lisp_chars, sizeof(*lisp_chars), len, stdout);
+ utf16_output(lisp_chars, len);
putchar('\n');
fflush(stdout);
@@ -192,6 +332,11 @@ debug_print(lispobj object)
print(object);
}
} else {
+ /*
+ * We should actually ever get here because %primitive print
+ * is only supposed to take strings. But if we do, it's
+ * useful to print something out anyway.
+ */
#if 1
printf("obj @0x%lx: ", (unsigned long) object);
#endif
-----------------------------------------------------------------------
Summary of changes:
src/lisp/interr.c | 159 ++++++++++++++++++++++++++++++++++++++++++++++++++--
1 files changed, 152 insertions(+), 7 deletions(-)
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