diff options
Diffstat (limited to 'gdb/utils.c')
| -rw-r--r-- | gdb/utils.c | 233 |
1 files changed, 226 insertions, 7 deletions
diff --git a/gdb/utils.c b/gdb/utils.c index b5c011b..3e817ed 100644 --- a/gdb/utils.c +++ b/gdb/utils.c @@ -68,6 +68,8 @@ #include "job-control.h" #include "common/selftest.h" #include "common/gdb_optional.h" +#include "cp-support.h" +#include <algorithm> #if !HAVE_DECL_MALLOC extern PTR malloc (); /* ARI: PTR */ @@ -2156,22 +2158,233 @@ fprintf_symbol_filtered (struct ui_file *stream, const char *name, } } +/* True if CH is a character that can be part of a symbol name. I.e., + either a number, a letter, or a '_'. */ + +static bool +valid_identifier_name_char (int ch) +{ + return (isalnum (ch) || ch == '_'); +} + +/* Skip to end of token, or to END, whatever comes first. Input is + assumed to be a C++ operator name. */ + +static const char * +cp_skip_operator_token (const char *token, const char *end) +{ + const char *p = token; + while (p != end && !isspace (*p) && *p != '(') + { + if (valid_identifier_name_char (*p)) + { + while (p != end && valid_identifier_name_char (*p)) + p++; + return p; + } + else + { + /* Note, ordered such that among ops that share a prefix, + longer comes first. This is so that the loop below can + bail on first match. */ + static const char *ops[] = + { + "[", + "]", + "~", + ",", + "-=", "--", "->", "-", + "+=", "++", "+", + "*=", "*", + "/=", "/", + "%=", "%", + "|=", "||", "|", + "&=", "&&", "&", + "^=", "^", + "!=", "!", + "<<=", "<=", "<<", "<", + ">>=", ">=", ">>", ">", + "==", "=", + }; + + for (const char *op : ops) + { + size_t oplen = strlen (op); + size_t lencmp = std::min<size_t> (oplen, end - p); + + if (strncmp (p, op, lencmp) == 0) + return p + lencmp; + } + /* Some unidentified character. Return it. */ + return p + 1; + } + } + + return p; +} + +/* Advance STRING1/STRING2 past whitespace. */ + +static void +skip_ws (const char *&string1, const char *&string2, const char *end_str2) +{ + while (isspace (*string1)) + string1++; + while (string2 < end_str2 && isspace (*string2)) + string2++; +} + +/* True if STRING points at the start of a C++ operator name. START + is the start of the string that STRING points to, hence when + reading backwards, we must not read any character before START. */ + +static bool +cp_is_operator (const char *string, const char *start) +{ + return ((string == start + || !valid_identifier_name_char (string[-1])) + && strncmp (string, CP_OPERATOR_STR, CP_OPERATOR_LEN) == 0 + && !valid_identifier_name_char (string[CP_OPERATOR_LEN])); +} + /* See utils.h. */ int strncmp_iw_with_mode (const char *string1, const char *string2, - size_t string2_len, strncmp_iw_mode mode) + size_t string2_len, strncmp_iw_mode mode, + enum language language) { + const char *string1_start = string1; const char *end_str2 = string2 + string2_len; + bool skip_spaces = true; + bool have_colon_op = (language == language_cplus + || language == language_rust + || language == language_fortran); while (1) { - while (isspace (*string1)) - string1++; - while (string2 < end_str2 && isspace (*string2)) - string2++; + if (skip_spaces + || ((isspace (*string1) && !valid_identifier_name_char (*string2)) + || (isspace (*string2) && !valid_identifier_name_char (*string1)))) + { + skip_ws (string1, string2, end_str2); + skip_spaces = false; + } + if (*string1 == '\0' || string2 == end_str2) break; + + /* Handle the :: operator. */ + if (have_colon_op && string1[0] == ':' && string1[1] == ':') + { + if (*string2 != ':') + return 1; + + string1++; + string2++; + + if (string2 == end_str2) + break; + + if (*string2 != ':') + return 1; + + string1++; + string2++; + + while (isspace (*string1)) + string1++; + while (string2 < end_str2 && isspace (*string2)) + string2++; + continue; + } + + /* Handle C++ user-defined operators. */ + else if (language == language_cplus + && *string1 == 'o') + { + if (cp_is_operator (string1, string1_start)) + { + /* An operator name in STRING1. Check STRING2. */ + size_t cmplen + = std::min<size_t> (CP_OPERATOR_LEN, end_str2 - string2); + if (strncmp (string1, string2, cmplen) != 0) + return 1; + + string1 += cmplen; + string2 += cmplen; + + if (string2 != end_str2) + { + /* Check for "operatorX" in STRING2. */ + if (valid_identifier_name_char (*string2)) + return 1; + + skip_ws (string1, string2, end_str2); + } + + /* Handle operator(). */ + if (*string1 == '(') + { + if (string2 == end_str2) + { + if (mode == strncmp_iw_mode::NORMAL) + return 0; + else + { + /* Don't break for the regular return at the + bottom, because "operator" should not + match "operator()", since this open + parentheses is not the parameter list + start. */ + return *string1 != '\0'; + } + } + + if (*string1 != *string2) + return 1; + + string1++; + string2++; + } + + while (1) + { + skip_ws (string1, string2, end_str2); + + /* Skip to end of token, or to END, whatever comes + first. */ + const char *end_str1 = string1 + strlen (string1); + const char *p1 = cp_skip_operator_token (string1, end_str1); + const char *p2 = cp_skip_operator_token (string2, end_str2); + + cmplen = std::min (p1 - string1, p2 - string2); + if (p2 == end_str2) + { + if (strncmp (string1, string2, cmplen) != 0) + return 1; + } + else + { + if (p1 - string1 != p2 - string2) + return 1; + if (strncmp (string1, string2, cmplen) != 0) + return 1; + } + + string1 += cmplen; + string2 += cmplen; + + if (*string1 == '\0' || string2 == end_str2) + break; + if (*string1 == '(' || *string2 == '(') + break; + } + + continue; + } + } + if (case_sensitivity == case_sensitive_on && *string1 != *string2) break; if (case_sensitivity == case_sensitive_off @@ -2179,6 +2392,12 @@ strncmp_iw_with_mode (const char *string1, const char *string2, != tolower ((unsigned char) *string2))) break; + /* If we see any non-whitespace, non-identifier-name character + (any of "()<>*&" etc.), then skip spaces the next time + around. */ + if (!isspace (*string1) && !valid_identifier_name_char (*string1)) + skip_spaces = true; + string1++; string2++; } @@ -2200,7 +2419,7 @@ int strncmp_iw (const char *string1, const char *string2, size_t string2_len) { return strncmp_iw_with_mode (string1, string2, string2_len, - strncmp_iw_mode::NORMAL); + strncmp_iw_mode::NORMAL, language_minimal); } /* See utils.h. */ @@ -2209,7 +2428,7 @@ int strcmp_iw (const char *string1, const char *string2) { return strncmp_iw_with_mode (string1, string2, strlen (string2), - strncmp_iw_mode::MATCH_PARAMS); + strncmp_iw_mode::MATCH_PARAMS, language_minimal); } /* This is like strcmp except that it ignores whitespace and treats |