From 8ceb4b83a4618fa691d81c9b7533f2cf3bcd64a3 Mon Sep 17 00:00:00 2001
From: ridiculousfish <corydoras@ridiculousfish.com>
Date: Sun, 24 Nov 2013 23:29:25 -0800
Subject: [PATCH] Remove old unescape() function

---
 common.cpp | 556 -----------------------------------------------------
 1 file changed, 556 deletions(-)

diff --git a/common.cpp b/common.cpp
index c98792fc9..f221b3ca2 100644
--- a/common.cpp
+++ b/common.cpp
@@ -1633,562 +1633,6 @@ static bool unescape_string_internal(const wchar_t * const input, const size_t i
     return ! errored;
 }
 
-wchar_t *unescape(const wchar_t * orig, int flags)
-{
-    int out_pos;
-    size_t in_pos;
-    size_t len;
-    int c;
-    int bracket_count=0;
-    wchar_t prev=0;
-    wchar_t *in;
-    bool unescape_special = !!(flags & UNESCAPE_SPECIAL);
-    bool allow_incomplete = !!(flags & UNESCAPE_INCOMPLETE);
-
-    CHECK(orig, 0);
-
-    len = wcslen(orig);
-    in = wcsdup(orig);
-
-    if (!in)
-        DIE_MEM();
-
-    enum
-    {
-        mode_unquoted,
-        mode_single_quotes,
-        mode_double_quotes
-    } mode = mode_unquoted;
-
-    for (in_pos=0, out_pos=0;
-            in_pos<len;
-            (prev=(out_pos>=0)?in[out_pos]:0), out_pos++, in_pos++)
-    {
-        c = in[in_pos];
-        switch (mode)
-        {
-
-                /*
-                  Mode 0 means unquoted string
-                */
-            case mode_unquoted:
-            {
-                if (c == L'\\')
-                {
-                    switch (in[++in_pos])
-                    {
-
-                            /*
-                              A null character after a backslash is an
-                              error, return null
-                            */
-                        case L'\0':
-                        {
-                            if (!allow_incomplete)
-                            {
-                                free(in);
-                                return 0;
-                            }
-                        }
-
-                        /*
-                          Numeric escape sequences. No prefix means
-                          octal escape, otherwise hexadecimal.
-                        */
-
-                        case L'0':
-                        case L'1':
-                        case L'2':
-                        case L'3':
-                        case L'4':
-                        case L'5':
-                        case L'6':
-                        case L'7':
-                        case L'u':
-                        case L'U':
-                        case L'x':
-                        case L'X':
-                        {
-                            int i;
-                            long long res=0;
-                            int chars=2;
-                            int base=16;
-
-                            int byte = 0;
-                            wchar_t max_val = ASCII_MAX;
-
-                            switch (in[in_pos])
-                            {
-                                case L'u':
-                                {
-                                    chars=4;
-                                    max_val = UCS2_MAX;
-                                    break;
-                                }
-
-                                case L'U':
-                                {
-                                    chars=8;
-                                    max_val = WCHAR_MAX;
-                                    break;
-                                }
-
-                                case L'x':
-                                {
-                                    break;
-                                }
-
-                                case L'X':
-                                {
-                                    byte=1;
-                                    max_val = BYTE_MAX;
-                                    break;
-                                }
-
-                                default:
-                                {
-                                    base=8;
-                                    chars=3;
-                                    // note in_pod must be larger than 0 since we incremented it above
-                                    assert(in_pos > 0);
-                                    in_pos--;
-                                    break;
-                                }
-                            }
-
-                            for (i=0; i<chars; i++)
-                            {
-                                long d = convert_digit(in[++in_pos],base);
-
-                                if (d < 0)
-                                {
-                                    in_pos--;
-                                    break;
-                                }
-
-                                res=(res*base)+d;
-                            }
-
-                            if ((res <= max_val))
-                            {
-                                in[out_pos] = (wchar_t)((byte?ENCODE_DIRECT_BASE:0)+res);
-                            }
-                            else
-                            {
-                                free(in);
-                                return 0;
-                            }
-
-                            break;
-                        }
-
-                        /*
-                          \a means bell (alert)
-                        */
-                        case L'a':
-                        {
-                            in[out_pos]=L'\a';
-                            break;
-                        }
-
-                        /*
-                          \b means backspace
-                        */
-                        case L'b':
-                        {
-                            in[out_pos]=L'\b';
-                            break;
-                        }
-
-                        /*
-                          \cX means control sequence X
-                        */
-                        case L'c':
-                        {
-                            in_pos++;
-                            if (in[in_pos] >= L'a' &&
-                                    in[in_pos] <= (L'a'+32))
-                            {
-                                in[out_pos]=in[in_pos]-L'a'+1;
-                            }
-                            else if (in[in_pos] >= L'A' &&
-                                     in[in_pos] <= (L'A'+32))
-                            {
-                                in[out_pos]=in[in_pos]-L'A'+1;
-                            }
-                            else
-                            {
-                                free(in);
-                                return 0;
-                            }
-                            break;
-
-                        }
-
-                        /*
-                          \x1b means escape
-                        */
-                        case L'e':
-                        {
-                            in[out_pos]=L'\x1b';
-                            break;
-                        }
-
-                        /*
-                          \f means form feed
-                        */
-                        case L'f':
-                        {
-                            in[out_pos]=L'\f';
-                            break;
-                        }
-
-                        /*
-                          \n means newline
-                        */
-                        case L'n':
-                        {
-                            in[out_pos]=L'\n';
-                            break;
-                        }
-
-                        /*
-                          \r means carriage return
-                        */
-                        case L'r':
-                        {
-                            in[out_pos]=L'\r';
-                            break;
-                        }
-
-                        /*
-                          \t means tab
-                         */
-                        case L't':
-                        {
-                            in[out_pos]=L'\t';
-                            break;
-                        }
-
-                        /*
-                          \v means vertical tab
-                        */
-                        case L'v':
-                        {
-                            in[out_pos]=L'\v';
-                            break;
-                        }
-
-                        /* If a backslash is followed by an actual newline, swallow them both */
-                        case L'\n':
-                            out_pos--;
-                            break;
-
-                        default:
-                        {
-                            if (unescape_special)
-                                in[out_pos++] = INTERNAL_SEPARATOR;
-                            in[out_pos]=in[in_pos];
-                            break;
-                        }
-                    }
-                }
-                else
-                {
-                    switch (in[in_pos])
-                    {
-                        case L'~':
-                        {
-                            if (unescape_special && (in_pos == 0))
-                            {
-                                in[out_pos]=HOME_DIRECTORY;
-                            }
-                            else
-                            {
-                                in[out_pos] = L'~';
-                            }
-                            break;
-                        }
-
-                        case L'%':
-                        {
-                            if (unescape_special && (in_pos == 0))
-                            {
-                                in[out_pos]=PROCESS_EXPAND;
-                            }
-                            else
-                            {
-                                in[out_pos]=in[in_pos];
-                            }
-                            break;
-                        }
-
-                        case L'*':
-                        {
-                            if (unescape_special)
-                            {
-                                if (out_pos > 0 && in[out_pos-1]==ANY_STRING)
-                                {
-                                    out_pos--;
-                                    in[out_pos] = ANY_STRING_RECURSIVE;
-                                }
-                                else
-                                    in[out_pos]=ANY_STRING;
-                            }
-                            else
-                            {
-                                in[out_pos]=in[in_pos];
-                            }
-                            break;
-                        }
-
-                        case L'?':
-                        {
-                            if (unescape_special)
-                            {
-                                in[out_pos]=ANY_CHAR;
-                            }
-                            else
-                            {
-                                in[out_pos]=in[in_pos];
-                            }
-                            break;
-                        }
-
-                        case L'$':
-                        {
-                            if (unescape_special)
-                            {
-                                in[out_pos]=VARIABLE_EXPAND;
-                            }
-                            else
-                            {
-                                in[out_pos]=in[in_pos];
-                            }
-                            break;
-                        }
-
-                        case L'{':
-                        {
-                            if (unescape_special)
-                            {
-                                bracket_count++;
-                                in[out_pos]=BRACKET_BEGIN;
-                            }
-                            else
-                            {
-                                in[out_pos]=in[in_pos];
-                            }
-                            break;
-                        }
-
-                        case L'}':
-                        {
-                            if (unescape_special)
-                            {
-                                bracket_count--;
-                                in[out_pos]=BRACKET_END;
-                            }
-                            else
-                            {
-                                in[out_pos]=in[in_pos];
-                            }
-                            break;
-                        }
-
-                        case L',':
-                        {
-                            if (unescape_special && bracket_count && prev!=BRACKET_SEP)
-                            {
-                                in[out_pos]=BRACKET_SEP;
-                            }
-                            else
-                            {
-                                in[out_pos]=in[in_pos];
-                            }
-                            break;
-                        }
-
-                        case L'\'':
-                        {
-                            mode = mode_single_quotes;
-                            if (unescape_special)
-                                in[out_pos] = INTERNAL_SEPARATOR;
-                            else
-                                out_pos--;
-                            break;
-                        }
-
-                        case L'\"':
-                        {
-                            mode = mode_double_quotes;
-                            if (unescape_special)
-                                in[out_pos] = INTERNAL_SEPARATOR;
-                            else
-                                out_pos--;
-                            break;
-                        }
-
-                        default:
-                        {
-                            in[out_pos] = in[in_pos];
-                            break;
-                        }
-                    }
-                }
-                break;
-            }
-
-            /*
-              Mode 1 means single quoted string, i.e 'foo'.
-              A backslash at the end of a line in a single quoted string does not swallow the backslash or newline.
-            */
-            case mode_single_quotes:
-            {
-                if (c == L'\\')
-                {
-                    switch (in[++in_pos])
-                    {
-                        case '\\':
-                        case L'\'':
-                        {
-                            in[out_pos]=in[in_pos];
-                            break;
-                        }
-
-                        case L'\0':
-                        {
-                            if (!allow_incomplete)
-                            {
-                                free(in);
-                                return 0;
-                            }
-                            else
-                            {
-                                //We may ever escape a NULL character, but still appending a \ in case I am wrong.
-                                in[out_pos] = L'\\';
-                            }
-                        }
-                        break;
-
-                        default:
-                        {
-                            in[out_pos++] = L'\\';
-                            in[out_pos]= in[in_pos];
-                        }
-                    }
-
-                }
-                if (c == L'\'')
-                {
-                    if (unescape_special)
-                        in[out_pos] = INTERNAL_SEPARATOR;
-                    else
-                        out_pos--;
-                    mode = mode_unquoted;
-                }
-                else
-                {
-                    in[out_pos] = in[in_pos];
-                }
-
-                break;
-            }
-
-            /*
-              Mode 2 means double quoted string, i.e. "foo"
-            */
-            case mode_double_quotes:
-            {
-                switch (c)
-                {
-                    case '"':
-                    {
-                        mode = mode_unquoted;
-                        if (unescape_special)
-                            in[out_pos] = INTERNAL_SEPARATOR;
-                        else
-                            out_pos--;
-                        break;
-                    }
-
-                    case '\\':
-                    {
-                        switch (in[++in_pos])
-                        {
-                            case L'\0':
-                            {
-                                if (!allow_incomplete)
-                                {
-                                    free(in);
-                                    return 0;
-                                }
-                                else
-                                {
-                                    //We probably don't need it since NULL character is always appended before ending this function.
-                                    in[out_pos]=in[in_pos];
-                                }
-                            }
-                            break;
-                            case '\\':
-                            case L'$':
-                            case '"':
-                            {
-                                in[out_pos]=in[in_pos];
-                                break;
-                            }
-
-                            case '\n':
-                            {
-                                out_pos--;
-                                break;
-                            }
-
-                            default:
-                            {
-                                in[out_pos++] = L'\\';
-                                in[out_pos] = in[in_pos];
-                                break;
-                            }
-                        }
-                        break;
-                    }
-
-                    case '$':
-                    {
-                        if (unescape_special)
-                        {
-                            in[out_pos]=VARIABLE_EXPAND_SINGLE;
-                        }
-                        else
-                        {
-                            in[out_pos]=in[in_pos];
-                        }
-                        break;
-                    }
-
-                    default:
-                    {
-                        in[out_pos] = in[in_pos];
-                        break;
-                    }
-
-                }
-                break;
-            }
-        }
-    }
-
-    if (!allow_incomplete && mode)
-    {
-        free(in);
-        return 0;
-    }
-
-    in[out_pos]=L'\0';
-    return in;
-}
-
 bool unescape_string_in_place(wcstring *str, unescape_flags_t escape_special)
 {
     assert(str != NULL);