diff options
Diffstat (limited to 'gdbsupport/format.cc')
| -rw-r--r-- | gdbsupport/format.cc | 93 |
1 files changed, 36 insertions, 57 deletions
diff --git a/gdbsupport/format.cc b/gdbsupport/format.cc index 12173ee..145c876 100644 --- a/gdbsupport/format.cc +++ b/gdbsupport/format.cc @@ -1,6 +1,6 @@ /* Parse a printf-style format string. - Copyright (C) 1986-2024 Free Software Foundation, Inc. + Copyright (C) 1986-2025 Free Software Foundation, Inc. This file is part of GDB. @@ -22,14 +22,11 @@ format_pieces::format_pieces (const char **arg, bool gdb_extensions, bool value_extension) { - const char *s; + const char *s = *arg; const char *string; - const char *prev_start; - const char *percent_loc; - char *sub_start, *current_substring; - enum argclass this_argclass; - s = *arg; + /* Buffer to hold the escaped-processed version of the string. */ + std::string de_escaped; if (gdb_extensions) { @@ -40,10 +37,6 @@ format_pieces::format_pieces (const char **arg, bool gdb_extensions, { /* Parse the format-control string and copy it into the string STRING, processing some kinds of escape sequence. */ - - char *f = (char *) alloca (strlen (s) + 1); - string = f; - while (*s != '"' && *s != '\0') { int c = *s++; @@ -56,34 +49,34 @@ format_pieces::format_pieces (const char **arg, bool gdb_extensions, switch (c = *s++) { case '\\': - *f++ = '\\'; + de_escaped += '\\'; break; case 'a': - *f++ = '\a'; + de_escaped += '\a'; break; case 'b': - *f++ = '\b'; + de_escaped += '\b'; break; case 'e': - *f++ = '\e'; + de_escaped += '\e'; break; case 'f': - *f++ = '\f'; + de_escaped += '\f'; break; case 'n': - *f++ = '\n'; + de_escaped += '\n'; break; case 'r': - *f++ = '\r'; + de_escaped += '\r'; break; case 't': - *f++ = '\t'; + de_escaped += '\t'; break; case 'v': - *f++ = '\v'; + de_escaped += '\v'; break; case '"': - *f++ = '"'; + de_escaped += '"'; break; default: /* ??? TODO: handle other escape sequences. */ @@ -93,29 +86,23 @@ format_pieces::format_pieces (const char **arg, bool gdb_extensions, break; default: - *f++ = c; + de_escaped += c; } } - /* Terminate our escape-processed copy. */ - *f++ = '\0'; + string = de_escaped.c_str (); /* Whether the format string ended with double-quote or zero, we're done with it; it's up to callers to complain about syntax. */ *arg = s; } - /* Need extra space for the '\0's. Doubling the size is sufficient. */ - - current_substring = (char *) xmalloc (strlen (string) * 2 + 1000); - m_storage.reset (current_substring); - /* Now scan the string for %-specs and see what kinds of args they want. argclass classifies the %-specs so we can give printf-type functions something of the right size. */ - const char *f = string; - prev_start = string; + const char *prev_start = string; + while (*f) if (*f++ == '%') { @@ -135,16 +122,15 @@ format_pieces::format_pieces (const char **arg, bool gdb_extensions, continue; } - sub_start = current_substring; + std::string::size_type sub_start = m_storage.size (); - strncpy (current_substring, prev_start, f - 1 - prev_start); - current_substring += f - 1 - prev_start; - *current_substring++ = '\0'; + m_storage.append (prev_start, f - 1 - prev_start); + m_storage += '\0'; - if (*sub_start != '\0') + if (m_storage[sub_start] != '\0') m_pieces.emplace_back (sub_start, literal_piece, 0); - percent_loc = f - 1; + const char *percent_loc = f - 1; /* Check the validity of the format specifier, and work out what argument it expects. We only accept C89 @@ -251,6 +237,8 @@ format_pieces::format_pieces (const char **arg, bool gdb_extensions, break; } + argclass this_argclass; + switch (*f) { case 'u': @@ -381,7 +369,7 @@ format_pieces::format_pieces (const char **arg, bool gdb_extensions, f++; - sub_start = current_substring; + sub_start = m_storage.size (); if (lcount > 1 && !seen_i64 && USE_PRINTF_I64) { @@ -389,11 +377,9 @@ format_pieces::format_pieces (const char **arg, bool gdb_extensions, Convert %lld to %I64d. */ int length_before_ll = f - percent_loc - 1 - lcount; - strncpy (current_substring, percent_loc, length_before_ll); - strcpy (current_substring + length_before_ll, "I64"); - current_substring[length_before_ll + 3] = - percent_loc[length_before_ll + lcount]; - current_substring += length_before_ll + 4; + m_storage.append (percent_loc, length_before_ll); + m_storage += "I64"; + m_storage += percent_loc[length_before_ll + lcount]; } else if (this_argclass == wide_string_arg || this_argclass == wide_char_arg) @@ -401,18 +387,13 @@ format_pieces::format_pieces (const char **arg, bool gdb_extensions, /* Convert %ls or %lc to %s. */ int length_before_ls = f - percent_loc - 2; - strncpy (current_substring, percent_loc, length_before_ls); - strcpy (current_substring + length_before_ls, "s"); - current_substring += length_before_ls + 2; + m_storage.append (percent_loc, length_before_ls); + m_storage += "s"; } else - { - strncpy (current_substring, percent_loc, f - percent_loc); - current_substring += f - percent_loc; - } - - *current_substring++ = '\0'; + m_storage.append (percent_loc, f - percent_loc); + m_storage += '\0'; prev_start = f; m_pieces.emplace_back (sub_start, this_argclass, n_int_args); @@ -422,11 +403,9 @@ format_pieces::format_pieces (const char **arg, bool gdb_extensions, if (f > prev_start) { - sub_start = current_substring; - - strncpy (current_substring, prev_start, f - prev_start); - current_substring += f - prev_start; - *current_substring++ = '\0'; + std::string::size_type sub_start = m_storage.size (); + m_storage.append (prev_start, f - prev_start); + /* No need for a final '\0', std::string already has one. */ m_pieces.emplace_back (sub_start, literal_piece, 0); } |