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+/****************************************************************************
+ * *
+ * GNAT COMPILER COMPONENTS *
+ * *
+ * A D A D E C O D E *
+ * *
+ * C Implementation File *
+ * *
+ * Copyright (C) 2001-2012, Free Software Foundation, Inc. *
+ * *
+ * GNAT is free software; you can redistribute it and/or modify it under *
+ * terms of the GNU General Public License as published by the Free Soft- *
+ * ware Foundation; either version 3, or (at your option) any later ver- *
+ * sion. GNAT is distributed in the hope that it will be useful, but WITH- *
+ * OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
+ * or FITNESS FOR A PARTICULAR PURPOSE. *
+ * *
+ * As a special exception under Section 7 of GPL version 3, you are granted *
+ * additional permissions described in the GCC Runtime Library Exception, *
+ * version 3.1, as published by the Free Software Foundation. *
+ * *
+ * You should have received a copy of the GNU General Public License and *
+ * a copy of the GCC Runtime Library Exception along with this program; *
+ * see the files COPYING3 and COPYING.RUNTIME respectively. If not, see *
+ * <http://www.gnu.org/licenses/>. *
+ * *
+ * GNAT was originally developed by the GNAT team at New York University. *
+ * Extensive contributions were provided by Ada Core Technologies Inc. *
+ * *
+ ****************************************************************************/
+
+
+#if defined(IN_RTS)
+#include "tconfig.h"
+#include "tsystem.h"
+#elif defined(IN_GCC)
+#include "config.h"
+#include "system.h"
+#endif
+
+#include <string.h>
+#include <stdio.h>
+#include <ctype.h>
+
+#include "adaint.h" /* for a macro version of xstrdup. */
+
+#ifndef ISDIGIT
+#define ISDIGIT(c) isdigit(c)
+#endif
+
+#ifndef PARMS
+#define PARMS(ARGS) ARGS
+#endif
+
+#include "adadecode.h"
+
+static void add_verbose (const char *, char *);
+static int has_prefix (const char *, const char *);
+static int has_suffix (const char *, const char *);
+
+/* This is a safe version of strcpy that can be used with overlapped
+ pointers. Does nothing if s2 <= s1. */
+static void ostrcpy (char *s1, char *s2);
+
+/* Set to nonzero if we have written any verbose info. */
+static int verbose_info;
+
+/* Add TEXT to end of ADA_NAME, putting a leading " (" or ", ", depending
+ on VERBOSE_INFO. */
+
+static void add_verbose (const char *text, char *ada_name)
+{
+ strcat (ada_name, verbose_info ? ", " : " (");
+ strcat (ada_name, text);
+
+ verbose_info = 1;
+}
+
+/* Returns 1 if NAME starts with PREFIX. */
+
+static int
+has_prefix (const char *name, const char *prefix)
+{
+ return strncmp (name, prefix, strlen (prefix)) == 0;
+}
+
+/* Returns 1 if NAME ends with SUFFIX. */
+
+static int
+has_suffix (const char *name, const char *suffix)
+{
+ int nlen = strlen (name);
+ int slen = strlen (suffix);
+
+ return nlen > slen && strncmp (name + nlen - slen, suffix, slen) == 0;
+}
+
+/* Safe overlapped pointers version of strcpy. */
+
+static void
+ostrcpy (char *s1, char *s2)
+{
+ if (s2 > s1)
+ {
+ while (*s2) *s1++ = *s2++;
+ *s1 = '\0';
+ }
+}
+
+/* This function will return the Ada name from the encoded form.
+ The Ada coding is done in exp_dbug.ads and this is the inverse function.
+ see exp_dbug.ads for full encoding rules, a short description is added
+ below. Right now only objects and routines are handled. Ada types are
+ stripped of their encodings.
+
+ CODED_NAME is the encoded entity name.
+
+ ADA_NAME is a pointer to a buffer, it will receive the Ada name. A safe
+ size for this buffer is: strlen (coded_name) * 2 + 60. (60 is for the
+ verbose information).
+
+ VERBOSE is nonzero if more information about the entity is to be
+ added at the end of the Ada name and surrounded by ( and ).
+
+ Coded name Ada name verbose info
+ ---------------------------------------------------------------------
+ _ada_xyz xyz library level
+ x__y__z x.y.z
+ x__yTKB x.y task body
+ x__yB x.y task body
+ x__yX x.y body nested
+ x__yXb x.y body nested
+ xTK__y x.y in task
+ x__y$2 x.y overloaded
+ x__y__3 x.y overloaded
+ x__Oabs "abs"
+ x__Oand "and"
+ x__Omod "mod"
+ x__Onot "not"
+ x__Oor "or"
+ x__Orem "rem"
+ x__Oxor "xor"
+ x__Oeq "="
+ x__One "/="
+ x__Olt "<"
+ x__Ole "<="
+ x__Ogt ">"
+ x__Oge ">="
+ x__Oadd "+"
+ x__Osubtract "-"
+ x__Oconcat "&"
+ x__Omultiply "*"
+ x__Odivide "/"
+ x__Oexpon "**" */
+
+void
+__gnat_decode (const char *coded_name, char *ada_name, int verbose)
+{
+ int lib_subprog = 0;
+ int overloaded = 0;
+ int task_body = 0;
+ int in_task = 0;
+ int body_nested = 0;
+
+ /* Deal with empty input early. This allows assuming non-null length
+ later on, simplifying coding. In principle, it should be our callers
+ business not to call here for empty inputs. It is easy enough to
+ allow it, however, and might allow simplifications upstream so is not
+ a bad thing per se. We need a guard in any case. */
+
+ if (*coded_name == '\0')
+ {
+ *ada_name = '\0';
+ return;
+ }
+
+ /* Check for library level subprogram. */
+ else if (has_prefix (coded_name, "_ada_"))
+ {
+ strcpy (ada_name, coded_name + 5);
+ lib_subprog = 1;
+ }
+ else
+ strcpy (ada_name, coded_name);
+
+ /* Check for the first triple underscore in the name. This indicates
+ that the name represents a type with encodings; in this case, we
+ need to strip the encodings. */
+ {
+ char *encodings;
+
+ if ((encodings = (char *) strstr (ada_name, "___")) != NULL)
+ {
+ *encodings = '\0';
+ }
+ }
+
+ /* Check for task body. */
+ if (has_suffix (ada_name, "TKB"))
+ {
+ ada_name[strlen (ada_name) - 3] = '\0';
+ task_body = 1;
+ }
+
+ if (has_suffix (ada_name, "B"))
+ {
+ ada_name[strlen (ada_name) - 1] = '\0';
+ task_body = 1;
+ }
+
+ /* Check for body-nested entity: X[bn] */
+ if (has_suffix (ada_name, "X"))
+ {
+ ada_name[strlen (ada_name) - 1] = '\0';
+ body_nested = 1;
+ }
+
+ if (has_suffix (ada_name, "Xb"))
+ {
+ ada_name[strlen (ada_name) - 2] = '\0';
+ body_nested = 1;
+ }
+
+ if (has_suffix (ada_name, "Xn"))
+ {
+ ada_name[strlen (ada_name) - 2] = '\0';
+ body_nested = 1;
+ }
+
+ /* Change instance of TK__ (object declared inside a task) to __. */
+ {
+ char *tktoken;
+
+ while ((tktoken = (char *) strstr (ada_name, "TK__")) != NULL)
+ {
+ ostrcpy (tktoken, tktoken + 2);
+ in_task = 1;
+ }
+ }
+
+ /* Check for overloading: name terminated by $nn or __nn. */
+ {
+ int len = strlen (ada_name);
+ int n_digits = 0;
+
+ if (len > 1)
+ while (ISDIGIT ((int) ada_name[(int) len - 1 - n_digits]))
+ n_digits++;
+
+ /* Check if we have $ or __ before digits. */
+ if (ada_name[len - 1 - n_digits] == '$')
+ {
+ ada_name[len - 1 - n_digits] = '\0';
+ overloaded = 1;
+ }
+ else if (ada_name[len - 1 - n_digits] == '_'
+ && ada_name[len - 1 - n_digits - 1] == '_')
+ {
+ ada_name[len - 1 - n_digits - 1] = '\0';
+ overloaded = 1;
+ }
+ }
+
+ /* Check for nested subprogram ending in .nnnn and strip suffix. */
+ {
+ int last = strlen (ada_name) - 1;
+
+ while (ISDIGIT (ada_name[last]) && last > 0)
+ {
+ last--;
+ }
+
+ if (ada_name[last] == '.')
+ {
+ ada_name[last] = (char) 0;
+ }
+ }
+
+ /* Change all "__" to ".". */
+ {
+ int len = strlen (ada_name);
+ int k = 0;
+
+ while (k < len)
+ {
+ if (ada_name[k] == '_' && ada_name[k+1] == '_')
+ {
+ ada_name[k] = '.';
+ ostrcpy (ada_name + k + 1, ada_name + k + 2);
+ len = len - 1;
+ }
+ k++;
+ }
+ }
+
+ /* Checks for operator name. */
+ {
+ const char *trans_table[][2]
+ = {{"Oabs", "\"abs\""}, {"Oand", "\"and\""}, {"Omod", "\"mod\""},
+ {"Onot", "\"not\""}, {"Oor", "\"or\""}, {"Orem", "\"rem\""},
+ {"Oxor", "\"xor\""}, {"Oeq", "\"=\""}, {"One", "\"/=\""},
+ {"Olt", "\"<\""}, {"Ole", "\"<=\""}, {"Ogt", "\">\""},
+ {"Oge", "\">=\""}, {"Oadd", "\"+\""}, {"Osubtract", "\"-\""},
+ {"Oconcat", "\"&\""}, {"Omultiply", "\"*\""}, {"Odivide", "\"/\""},
+ {"Oexpon", "\"**\""}, {NULL, NULL} };
+ int k = 0;
+
+ while (1)
+ {
+ char *optoken;
+
+ if ((optoken = (char *) strstr (ada_name, trans_table[k][0])) != NULL)
+ {
+ int codedlen = strlen (trans_table[k][0]);
+ int oplen = strlen (trans_table[k][1]);
+
+ if (codedlen > oplen)
+ /* We shrink the space. */
+ ostrcpy (optoken, optoken + codedlen - oplen);
+ else if (oplen > codedlen)
+ {
+ /* We need more space. */
+ int len = strlen (ada_name);
+ int space = oplen - codedlen;
+ int num_to_move = &ada_name[len] - optoken;
+ int t;
+
+ for (t = 0; t < num_to_move; t++)
+ ada_name[len + space - t - 1] = ada_name[len - t - 1];
+ }
+
+ /* Write symbol in the space. */
+ strncpy (optoken, trans_table[k][1], oplen);
+ }
+ else
+ k++;
+
+ /* Check for table's ending. */
+ if (trans_table[k][0] == NULL)
+ break;
+ }
+ }
+
+ /* If verbose mode is on, we add some information to the Ada name. */
+ if (verbose)
+ {
+ if (overloaded)
+ add_verbose ("overloaded", ada_name);
+
+ if (lib_subprog)
+ add_verbose ("library level", ada_name);
+
+ if (body_nested)
+ add_verbose ("body nested", ada_name);
+
+ if (in_task)
+ add_verbose ("in task", ada_name);
+
+ if (task_body)
+ add_verbose ("task body", ada_name);
+
+ if (verbose_info == 1)
+ strcat (ada_name, ")");
+ }
+}
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef IN_GCC
+char *
+ada_demangle (const char *coded_name)
+{
+ char ada_name[2048];
+
+ __gnat_decode (coded_name, ada_name, 0);
+ return xstrdup (ada_name);
+}
+#endif
+
+void
+get_encoding (const char *coded_name, char *encoding)
+{
+ char * dest_index = encoding;
+ const char *p;
+ int found = 0;
+ int count = 0;
+
+ /* The heuristics is the following: we assume that the first triple
+ underscore in an encoded name indicates the beginning of the
+ first encoding, and that subsequent triple underscores indicate
+ the next encodings. We assume that the encodings are always at the
+ end of encoded names. */
+
+ for (p = coded_name; *p != '\0'; p++)
+ {
+ if (*p != '_')
+ count = 0;
+ else
+ if (++count == 3)
+ {
+ count = 0;
+
+ if (found)
+ {
+ dest_index = dest_index - 2;
+ *dest_index++ = ':';
+ }
+
+ p++;
+ found = 1;
+ }
+
+ if (found)
+ *dest_index++ = *p;
+ }
+
+ *dest_index = '\0';
+}
+
+#ifdef __cplusplus
+}
+#endif
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