--- /dev/null
+/*
+ * upb::pb::TextPrinter
+ *
+ * OPT: This is not optimized at all. It uses printf() which parses the format
+ * string every time, and it allocates memory for every put.
+ */
+
+#include "upb/pb/textprinter.h"
+
+#include <ctype.h>
+#include <float.h>
+#include <inttypes.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "upb/sink.h"
+
+#include "upb/port_def.inc"
+
+struct upb_textprinter {
+ upb_sink input_;
+ upb_bytessink output_;
+ int indent_depth_;
+ bool single_line_;
+ void *subc;
+};
+
+#define CHECK(x) if ((x) < 0) goto err;
+
+static const char *shortname(const char *longname) {
+ const char *last = strrchr(longname, '.');
+ return last ? last + 1 : longname;
+}
+
+static int indent(upb_textprinter *p) {
+ int i;
+ if (!p->single_line_)
+ for (i = 0; i < p->indent_depth_; i++)
+ upb_bytessink_putbuf(p->output_, p->subc, " ", 2, NULL);
+ return 0;
+}
+
+static int endfield(upb_textprinter *p) {
+ const char ch = (p->single_line_ ? ' ' : '\n');
+ upb_bytessink_putbuf(p->output_, p->subc, &ch, 1, NULL);
+ return 0;
+}
+
+static int putescaped(upb_textprinter *p, const char *buf, size_t len,
+ bool preserve_utf8) {
+ /* Based on CEscapeInternal() from Google's protobuf release. */
+ char dstbuf[4096], *dst = dstbuf, *dstend = dstbuf + sizeof(dstbuf);
+ const char *end = buf + len;
+
+ /* I think hex is prettier and more useful, but proto2 uses octal; should
+ * investigate whether it can parse hex also. */
+ const bool use_hex = false;
+ bool last_hex_escape = false; /* true if last output char was \xNN */
+
+ for (; buf < end; buf++) {
+ bool is_hex_escape;
+
+ if (dstend - dst < 4) {
+ upb_bytessink_putbuf(p->output_, p->subc, dstbuf, dst - dstbuf, NULL);
+ dst = dstbuf;
+ }
+
+ is_hex_escape = false;
+ switch (*buf) {
+ case '\n': *(dst++) = '\\'; *(dst++) = 'n'; break;
+ case '\r': *(dst++) = '\\'; *(dst++) = 'r'; break;
+ case '\t': *(dst++) = '\\'; *(dst++) = 't'; break;
+ case '\"': *(dst++) = '\\'; *(dst++) = '\"'; break;
+ case '\'': *(dst++) = '\\'; *(dst++) = '\''; break;
+ case '\\': *(dst++) = '\\'; *(dst++) = '\\'; break;
+ default:
+ /* Note that if we emit \xNN and the buf character after that is a hex
+ * digit then that digit must be escaped too to prevent it being
+ * interpreted as part of the character code by C. */
+ if ((!preserve_utf8 || (uint8_t)*buf < 0x80) &&
+ (!isprint(*buf) || (last_hex_escape && isxdigit(*buf)))) {
+ sprintf(dst, (use_hex ? "\\x%02x" : "\\%03o"), (uint8_t)*buf);
+ is_hex_escape = use_hex;
+ dst += 4;
+ } else {
+ *(dst++) = *buf; break;
+ }
+ }
+ last_hex_escape = is_hex_escape;
+ }
+ /* Flush remaining data. */
+ upb_bytessink_putbuf(p->output_, p->subc, dstbuf, dst - dstbuf, NULL);
+ return 0;
+}
+
+bool putf(upb_textprinter *p, const char *fmt, ...) {
+ va_list args;
+ va_list args_copy;
+ char *str;
+ int written;
+ int len;
+ bool ok;
+
+ va_start(args, fmt);
+
+ /* Run once to get the length of the string. */
+ _upb_va_copy(args_copy, args);
+ len = _upb_vsnprintf(NULL, 0, fmt, args_copy);
+ va_end(args_copy);
+
+ /* + 1 for NULL terminator (vsprintf() requires it even if we don't). */
+ str = upb_gmalloc(len + 1);
+ if (!str) return false;
+ written = vsprintf(str, fmt, args);
+ va_end(args);
+ UPB_ASSERT(written == len);
+
+ ok = upb_bytessink_putbuf(p->output_, p->subc, str, len, NULL);
+ upb_gfree(str);
+ return ok;
+}
+
+
+/* handlers *******************************************************************/
+
+static bool textprinter_startmsg(void *c, const void *hd) {
+ upb_textprinter *p = c;
+ UPB_UNUSED(hd);
+ if (p->indent_depth_ == 0) {
+ upb_bytessink_start(p->output_, 0, &p->subc);
+ }
+ return true;
+}
+
+static bool textprinter_endmsg(void *c, const void *hd, upb_status *s) {
+ upb_textprinter *p = c;
+ UPB_UNUSED(hd);
+ UPB_UNUSED(s);
+ if (p->indent_depth_ == 0) {
+ upb_bytessink_end(p->output_);
+ }
+ return true;
+}
+
+#define TYPE(name, ctype, fmt) \
+ static bool textprinter_put ## name(void *closure, const void *handler_data, \
+ ctype val) { \
+ upb_textprinter *p = closure; \
+ const upb_fielddef *f = handler_data; \
+ CHECK(indent(p)); \
+ putf(p, "%s: " fmt, upb_fielddef_name(f), val); \
+ CHECK(endfield(p)); \
+ return true; \
+ err: \
+ return false; \
+}
+
+static bool textprinter_putbool(void *closure, const void *handler_data,
+ bool val) {
+ upb_textprinter *p = closure;
+ const upb_fielddef *f = handler_data;
+ CHECK(indent(p));
+ putf(p, "%s: %s", upb_fielddef_name(f), val ? "true" : "false");
+ CHECK(endfield(p));
+ return true;
+err:
+ return false;
+}
+
+#define STRINGIFY_HELPER(x) #x
+#define STRINGIFY_MACROVAL(x) STRINGIFY_HELPER(x)
+
+TYPE(int32, int32_t, "%" PRId32)
+TYPE(int64, int64_t, "%" PRId64)
+TYPE(uint32, uint32_t, "%" PRIu32)
+TYPE(uint64, uint64_t, "%" PRIu64)
+TYPE(float, float, "%." STRINGIFY_MACROVAL(FLT_DIG) "g")
+TYPE(double, double, "%." STRINGIFY_MACROVAL(DBL_DIG) "g")
+
+#undef TYPE
+
+/* Output a symbolic value from the enum if found, else just print as int32. */
+static bool textprinter_putenum(void *closure, const void *handler_data,
+ int32_t val) {
+ upb_textprinter *p = closure;
+ const upb_fielddef *f = handler_data;
+ const upb_enumdef *enum_def = upb_fielddef_enumsubdef(f);
+ const char *label = upb_enumdef_iton(enum_def, val);
+ if (label) {
+ indent(p);
+ putf(p, "%s: %s", upb_fielddef_name(f), label);
+ endfield(p);
+ } else {
+ if (!textprinter_putint32(closure, handler_data, val))
+ return false;
+ }
+ return true;
+}
+
+static void *textprinter_startstr(void *closure, const void *handler_data,
+ size_t size_hint) {
+ upb_textprinter *p = closure;
+ const upb_fielddef *f = handler_data;
+ UPB_UNUSED(size_hint);
+ indent(p);
+ putf(p, "%s: \"", upb_fielddef_name(f));
+ return p;
+}
+
+static bool textprinter_endstr(void *closure, const void *handler_data) {
+ upb_textprinter *p = closure;
+ UPB_UNUSED(handler_data);
+ putf(p, "\"");
+ endfield(p);
+ return true;
+}
+
+static size_t textprinter_putstr(void *closure, const void *hd, const char *buf,
+ size_t len, const upb_bufhandle *handle) {
+ upb_textprinter *p = closure;
+ const upb_fielddef *f = hd;
+ UPB_UNUSED(handle);
+ CHECK(putescaped(p, buf, len, upb_fielddef_type(f) == UPB_TYPE_STRING));
+ return len;
+err:
+ return 0;
+}
+
+static void *textprinter_startsubmsg(void *closure, const void *handler_data) {
+ upb_textprinter *p = closure;
+ const char *name = handler_data;
+ CHECK(indent(p));
+ putf(p, "%s {%c", name, p->single_line_ ? ' ' : '\n');
+ p->indent_depth_++;
+ return p;
+err:
+ return UPB_BREAK;
+}
+
+static bool textprinter_endsubmsg(void *closure, const void *handler_data) {
+ upb_textprinter *p = closure;
+ UPB_UNUSED(handler_data);
+ p->indent_depth_--;
+ CHECK(indent(p));
+ upb_bytessink_putbuf(p->output_, p->subc, "}", 1, NULL);
+ CHECK(endfield(p));
+ return true;
+err:
+ return false;
+}
+
+static void onmreg(const void *c, upb_handlers *h) {
+ const upb_msgdef *m = upb_handlers_msgdef(h);
+ upb_msg_field_iter i;
+ UPB_UNUSED(c);
+
+ upb_handlers_setstartmsg(h, textprinter_startmsg, NULL);
+ upb_handlers_setendmsg(h, textprinter_endmsg, NULL);
+
+ for(upb_msg_field_begin(&i, m);
+ !upb_msg_field_done(&i);
+ upb_msg_field_next(&i)) {
+ upb_fielddef *f = upb_msg_iter_field(&i);
+ upb_handlerattr attr = UPB_HANDLERATTR_INIT;
+ attr.handler_data = f;
+ switch (upb_fielddef_type(f)) {
+ case UPB_TYPE_INT32:
+ upb_handlers_setint32(h, f, textprinter_putint32, &attr);
+ break;
+ case UPB_TYPE_INT64:
+ upb_handlers_setint64(h, f, textprinter_putint64, &attr);
+ break;
+ case UPB_TYPE_UINT32:
+ upb_handlers_setuint32(h, f, textprinter_putuint32, &attr);
+ break;
+ case UPB_TYPE_UINT64:
+ upb_handlers_setuint64(h, f, textprinter_putuint64, &attr);
+ break;
+ case UPB_TYPE_FLOAT:
+ upb_handlers_setfloat(h, f, textprinter_putfloat, &attr);
+ break;
+ case UPB_TYPE_DOUBLE:
+ upb_handlers_setdouble(h, f, textprinter_putdouble, &attr);
+ break;
+ case UPB_TYPE_BOOL:
+ upb_handlers_setbool(h, f, textprinter_putbool, &attr);
+ break;
+ case UPB_TYPE_STRING:
+ case UPB_TYPE_BYTES:
+ upb_handlers_setstartstr(h, f, textprinter_startstr, &attr);
+ upb_handlers_setstring(h, f, textprinter_putstr, &attr);
+ upb_handlers_setendstr(h, f, textprinter_endstr, &attr);
+ break;
+ case UPB_TYPE_MESSAGE: {
+ const char *name =
+ upb_fielddef_descriptortype(f) == UPB_DESCRIPTOR_TYPE_GROUP
+ ? shortname(upb_msgdef_fullname(upb_fielddef_msgsubdef(f)))
+ : upb_fielddef_name(f);
+ attr.handler_data = name;
+ upb_handlers_setstartsubmsg(h, f, textprinter_startsubmsg, &attr);
+ upb_handlers_setendsubmsg(h, f, textprinter_endsubmsg, &attr);
+ break;
+ }
+ case UPB_TYPE_ENUM:
+ upb_handlers_setint32(h, f, textprinter_putenum, &attr);
+ break;
+ }
+ }
+}
+
+static void textprinter_reset(upb_textprinter *p, bool single_line) {
+ p->single_line_ = single_line;
+ p->indent_depth_ = 0;
+}
+
+
+/* Public API *****************************************************************/
+
+upb_textprinter *upb_textprinter_create(upb_arena *arena, const upb_handlers *h,
+ upb_bytessink output) {
+ upb_textprinter *p = upb_arena_malloc(arena, sizeof(upb_textprinter));
+ if (!p) return NULL;
+
+ p->output_ = output;
+ upb_sink_reset(&p->input_, h, p);
+ textprinter_reset(p, false);
+
+ return p;
+}
+
+upb_handlercache *upb_textprinter_newcache(void) {
+ return upb_handlercache_new(&onmreg, NULL);
+}
+
+upb_sink upb_textprinter_input(upb_textprinter *p) { return p->input_; }
+
+void upb_textprinter_setsingleline(upb_textprinter *p, bool single_line) {
+ p->single_line_ = single_line;
+}
git://repos.xcallymotion.com / motion2.git / blobdiff