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-rw-r--r--fontconfig/src/fcformat.c2414
1 files changed, 1211 insertions, 1203 deletions
diff --git a/fontconfig/src/fcformat.c b/fontconfig/src/fcformat.c
index bf9401740..28433a705 100644
--- a/fontconfig/src/fcformat.c
+++ b/fontconfig/src/fcformat.c
@@ -1,1203 +1,1211 @@
-/*
- * Copyright © 2008,2009 Red Hat, Inc.
- *
- * Red Hat Author(s): Behdad Esfahbod
- *
- * Permission to use, copy, modify, distribute, and sell this software and its
- * documentation for any purpose is hereby granted without fee, provided that
- * the above copyright notice appear in all copies and that both that
- * copyright notice and this permission notice appear in supporting
- * documentation, and that the name of Keith Packard not be used in
- * advertising or publicity pertaining to distribution of the software without
- * specific, written prior permission. Keith Packard makes no
- * representations about the suitability of this software for any purpose. It
- * is provided "as is" without express or implied warranty.
- *
- * THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
- * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
- * EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY SPECIAL, INDIRECT OR
- * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
- * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
- * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- * PERFORMANCE OF THIS SOFTWARE.
- */
-
-#include "fcint.h"
-#include <stdlib.h>
-#include <string.h>
-#include <stdarg.h>
-
-
-/* The language is documented in doc/fcformat.fncs
- * These are the features implemented:
- *
- * simple %{elt}
- * width %width{elt}
- * index %{elt[idx]}
- * name= %{elt=}
- * :name= %{:elt}
- * default %{elt:-word}
- * count %{#elt}
- * subexpr %{{expr}}
- * filter-out %{-elt1,elt2,elt3{expr}}
- * filter-in %{+elt1,elt2,elt3{expr}}
- * conditional %{?elt1,elt2,!elt3{}{}}
- * enumerate %{[]elt1,elt2{expr}}
- * langset langset enumeration using the same syntax
- * builtin %{=blt}
- * convert %{elt|conv1|conv2|conv3}
- *
- * converters:
- * basename FcStrBasename
- * dirname FcStrDirname
- * downcase FcStrDowncase
- * shescape
- * cescape
- * xmlescape
- * delete delete chars
- * escape escape chars
- * translate translate chars
- *
- * builtins:
- * unparse FcNameUnparse
- * fcmatch fc-match default
- * fclist fc-list default
- * pkgkit PackageKit package tag format
- *
- *
- * Some ideas for future syntax extensions:
- *
- * - verbose builtin that is like FcPatternPrint
- * - allow indexing subexprs using '%{[idx]elt1,elt2{subexpr}}'
- * - conditional/filtering/deletion on binding (using '(w)'/'(s)'/'(=)' notation)
- */
-
-
-#define FCMATCH_FORMAT "%{file:-<unknown filename>|basename}: \"%{family[0]:-<unknown family>}\" \"%{style[0]:-<unknown style>}\""
-#define FCLIST_FORMAT "%{?file{%{file}: }}%{=unparse}"
-#define PKGKIT_FORMAT "%{[]family{font(%{family|downcase|delete( )})\n}}%{[]lang{font(:lang=%{lang|downcase|translate(_,-)})\n}}"
-
-
-static void
-message (const char *fmt, ...)
-{
- va_list args;
- va_start (args, fmt);
- fprintf (stderr, "Fontconfig: Pattern format error: ");
- vfprintf (stderr, fmt, args);
- fprintf (stderr, ".\n");
- va_end (args);
-}
-
-
-typedef struct _FcFormatContext
-{
- const FcChar8 *format_orig;
- const FcChar8 *format;
- int format_len;
- FcChar8 *word;
- FcBool word_allocated;
-} FcFormatContext;
-
-static FcBool
-FcFormatContextInit (FcFormatContext *c,
- const FcChar8 *format,
- FcChar8 *scratch,
- int scratch_len)
-{
- c->format_orig = c->format = format;
- c->format_len = strlen ((const char *) format);
-
- if (c->format_len < scratch_len)
- {
- c->word = scratch;
- c->word_allocated = FcFalse;
- }
- else
- {
- c->word = malloc (c->format_len + 1);
- c->word_allocated = FcTrue;
- }
-
- return c->word != NULL;
-}
-
-static void
-FcFormatContextDone (FcFormatContext *c)
-{
- if (c && c->word_allocated)
- {
- free (c->word);
- }
-}
-
-static FcBool
-consume_char (FcFormatContext *c,
- FcChar8 term)
-{
- if (*c->format != term)
- return FcFalse;
-
- c->format++;
- return FcTrue;
-}
-
-static FcBool
-expect_char (FcFormatContext *c,
- FcChar8 term)
-{
- FcBool res = consume_char (c, term);
- if (!res)
- {
- if (c->format == c->format_orig + c->format_len)
- message ("format ended while expecting '%c'",
- term);
- else
- message ("expected '%c' at %d",
- term, c->format - c->format_orig + 1);
- }
- return res;
-}
-
-static FcBool
-FcCharIsPunct (const FcChar8 c)
-{
- if (c < '0')
- return FcTrue;
- if (c <= '9')
- return FcFalse;
- if (c < 'A')
- return FcTrue;
- if (c <= 'Z')
- return FcFalse;
- if (c < 'a')
- return FcTrue;
- if (c <= 'z')
- return FcFalse;
- if (c <= '~')
- return FcTrue;
- return FcFalse;
-}
-
-static char escaped_char(const char ch)
-{
- switch (ch) {
- case 'a': return '\a';
- case 'b': return '\b';
- case 'f': return '\f';
- case 'n': return '\n';
- case 'r': return '\r';
- case 't': return '\t';
- case 'v': return '\v';
- default: return ch;
- }
-}
-
-static FcBool
-read_word (FcFormatContext *c)
-{
- FcChar8 *p;
-
- p = c->word;
-
- while (*c->format)
- {
- if (*c->format == '\\')
- {
- c->format++;
- if (*c->format)
- *p++ = escaped_char (*c->format++);
- continue;
- }
- else if (FcCharIsPunct (*c->format))
- break;
-
- *p++ = *c->format++;
- }
- *p = '\0';
-
- if (p == c->word)
- {
- message ("expected identifier at %d",
- c->format - c->format_orig + 1);
- return FcFalse;
- }
-
- return FcTrue;
-}
-
-static FcBool
-read_chars (FcFormatContext *c,
- FcChar8 term)
-{
- FcChar8 *p;
-
- p = c->word;
-
- while (*c->format && *c->format != '}' && *c->format != term)
- {
- if (*c->format == '\\')
- {
- c->format++;
- if (*c->format)
- *p++ = escaped_char (*c->format++);
- continue;
- }
-
- *p++ = *c->format++;
- }
- *p = '\0';
-
- if (p == c->word)
- {
- message ("expected character data at %d",
- c->format - c->format_orig + 1);
- return FcFalse;
- }
-
- return FcTrue;
-}
-
-static FcBool
-FcPatternFormatToBuf (FcPattern *pat,
- const FcChar8 *format,
- FcStrBuf *buf);
-
-static FcBool
-interpret_builtin (FcFormatContext *c,
- FcPattern *pat,
- FcStrBuf *buf)
-{
- FcChar8 *new_str;
- FcBool ret;
-
- if (!expect_char (c, '=') ||
- !read_word (c))
- return FcFalse;
-
- /* try simple builtins first */
- if (0) { }
-#define BUILTIN(name, func) \
- else if (0 == strcmp ((const char *) c->word, name))\
- do { new_str = func (pat); ret = FcTrue; } while (0)
- BUILTIN ("unparse", FcNameUnparse);
- /* BUILTIN ("verbose", FcPatternPrint); XXX */
-#undef BUILTIN
- else
- ret = FcFalse;
-
- if (ret)
- {
- if (new_str)
- {
- FcStrBufString (buf, new_str);
- free (new_str);
- return FcTrue;
- }
- else
- return FcFalse;
- }
-
- /* now try our custom formats */
- if (0) { }
-#define BUILTIN(name, format) \
- else if (0 == strcmp ((const char *) c->word, name))\
- ret = FcPatternFormatToBuf (pat, (const FcChar8 *) format, buf)
- BUILTIN ("fcmatch", FCMATCH_FORMAT);
- BUILTIN ("fclist", FCLIST_FORMAT);
- BUILTIN ("pkgkit", PKGKIT_FORMAT);
-#undef BUILTIN
- else
- ret = FcFalse;
-
- if (!ret)
- message ("unknown builtin \"%s\"",
- c->word);
-
- return ret;
-}
-
-static FcBool
-interpret_expr (FcFormatContext *c,
- FcPattern *pat,
- FcStrBuf *buf,
- FcChar8 term);
-
-static FcBool
-interpret_subexpr (FcFormatContext *c,
- FcPattern *pat,
- FcStrBuf *buf)
-{
- return expect_char (c, '{') &&
- interpret_expr (c, pat, buf, '}') &&
- expect_char (c, '}');
-}
-
-static FcBool
-maybe_interpret_subexpr (FcFormatContext *c,
- FcPattern *pat,
- FcStrBuf *buf)
-{
- return (*c->format == '{') ?
- interpret_subexpr (c, pat, buf) :
- FcTrue;
-}
-
-static FcBool
-skip_subexpr (FcFormatContext *c);
-
-static FcBool
-skip_percent (FcFormatContext *c)
-{
- int width;
-
- if (!expect_char (c, '%'))
- return FcFalse;
-
- /* skip an optional width specifier */
- width = strtol ((const char *) c->format, (char **) &c->format, 10);
-
- if (!expect_char (c, '{'))
- return FcFalse;
-
- while(*c->format && *c->format != '}')
- {
- switch (*c->format)
- {
- case '\\':
- c->format++; /* skip over '\\' */
- if (*c->format)
- c->format++;
- continue;
- case '{':
- if (!skip_subexpr (c))
- return FcFalse;
- continue;
- }
- c->format++;
- }
-
- return expect_char (c, '}');
-}
-
-static FcBool
-skip_expr (FcFormatContext *c)
-{
- while(*c->format && *c->format != '}')
- {
- switch (*c->format)
- {
- case '\\':
- c->format++; /* skip over '\\' */
- if (*c->format)
- c->format++;
- continue;
- case '%':
- if (!skip_percent (c))
- return FcFalse;
- continue;
- }
- c->format++;
- }
-
- return FcTrue;
-}
-
-static FcBool
-skip_subexpr (FcFormatContext *c)
-{
- return expect_char (c, '{') &&
- skip_expr (c) &&
- expect_char (c, '}');
-}
-
-static FcBool
-maybe_skip_subexpr (FcFormatContext *c)
-{
- return (*c->format == '{') ?
- skip_subexpr (c) :
- FcTrue;
-}
-
-static FcBool
-interpret_filter_in (FcFormatContext *c,
- FcPattern *pat,
- FcStrBuf *buf)
-{
- FcObjectSet *os;
- FcPattern *subpat;
-
- if (!expect_char (c, '+'))
- return FcFalse;
-
- os = FcObjectSetCreate ();
- if (!os)
- return FcFalse;
-
- do
- {
- if (!read_word (c) ||
- !FcObjectSetAdd (os, (const char *) c->word))
- {
- FcObjectSetDestroy (os);
- return FcFalse;
- }
- }
- while (consume_char (c, ','));
-
- subpat = FcPatternFilter (pat, os);
- FcObjectSetDestroy (os);
-
- if (!subpat ||
- !interpret_subexpr (c, subpat, buf))
- return FcFalse;
-
- FcPatternDestroy (subpat);
- return FcTrue;
-}
-
-static FcBool
-interpret_filter_out (FcFormatContext *c,
- FcPattern *pat,
- FcStrBuf *buf)
-{
- FcPattern *subpat;
-
- if (!expect_char (c, '-'))
- return FcFalse;
-
- subpat = FcPatternDuplicate (pat);
- if (!subpat)
- return FcFalse;
-
- do
- {
- if (!read_word (c))
- {
- FcPatternDestroy (subpat);
- return FcFalse;
- }
-
- FcPatternDel (subpat, (const char *) c->word);
- }
- while (consume_char (c, ','));
-
- if (!interpret_subexpr (c, subpat, buf))
- return FcFalse;
-
- FcPatternDestroy (subpat);
- return FcTrue;
-}
-
-static FcBool
-interpret_cond (FcFormatContext *c,
- FcPattern *pat,
- FcStrBuf *buf)
-{
- FcBool pass;
-
- if (!expect_char (c, '?'))
- return FcFalse;
-
- pass = FcTrue;
-
- do
- {
- FcBool negate;
- FcValue v;
-
- negate = consume_char (c, '!');
-
- if (!read_word (c))
- return FcFalse;
-
- pass = pass &&
- (negate ^
- (FcResultMatch ==
- FcPatternGet (pat, (const char *) c->word, 0, &v)));
- }
- while (consume_char (c, ','));
-
- if (pass)
- {
- if (!interpret_subexpr (c, pat, buf) ||
- !maybe_skip_subexpr (c))
- return FcFalse;
- }
- else
- {
- if (!skip_subexpr (c) ||
- !maybe_interpret_subexpr (c, pat, buf))
- return FcFalse;
- }
-
- return FcTrue;
-}
-
-static FcBool
-interpret_count (FcFormatContext *c,
- FcPattern *pat,
- FcStrBuf *buf)
-{
- int count;
- FcPatternElt *e;
- FcChar8 buf_static[64];
-
- if (!expect_char (c, '#'))
- return FcFalse;
-
- if (!read_word (c))
- return FcFalse;
-
- count = 0;
- e = FcPatternObjectFindElt (pat,
- FcObjectFromName ((const char *) c->word));
- if (e)
- {
- FcValueListPtr l;
- count++;
- for (l = FcPatternEltValues(e);
- l->next;
- l = l->next)
- count++;
- }
-
- snprintf ((char *) buf_static, sizeof (buf_static), "%d", count);
- FcStrBufString (buf, buf_static);
-
- return FcTrue;
-}
-
-static FcBool
-interpret_enumerate (FcFormatContext *c,
- FcPattern *pat,
- FcStrBuf *buf)
-{
- FcObjectSet *os;
- FcPattern *subpat;
- const FcChar8 *format_save;
- int idx;
- FcBool ret, done;
- FcStrList *lang_strs;
-
- if (!expect_char (c, '[') ||
- !expect_char (c, ']'))
- return FcFalse;
-
- os = FcObjectSetCreate ();
- if (!os)
- return FcFalse;
-
- ret = FcTrue;
-
- do
- {
- if (!read_word (c) ||
- !FcObjectSetAdd (os, (const char *) c->word))
- {
- FcObjectSetDestroy (os);
- return FcFalse;
- }
- }
- while (consume_char (c, ','));
-
- /* If we have one element and it's of type FcLangSet, we want
- * to enumerate the languages in it. */
- lang_strs = NULL;
- if (os->nobject == 1)
- {
- FcLangSet *langset;
- if (FcResultMatch ==
- FcPatternGetLangSet (pat, os->objects[0], idx, &langset))
- {
- FcStrSet *ss;
- if (!(ss = FcLangSetGetLangs (langset)) ||
- !(lang_strs = FcStrListCreate (ss)))
- goto bail0;
- }
- }
-
- subpat = FcPatternDuplicate (pat);
- if (!subpat)
- goto bail0;
-
- format_save = c->format;
- idx = 0;
- do
- {
- int i;
-
- done = FcTrue;
-
- if (lang_strs)
- {
- FcChar8 *lang;
-
- FcPatternDel (subpat, os->objects[0]);
- if ((lang = FcStrListNext (lang_strs)))
- {
- FcPatternAddString (subpat, os->objects[0], lang);
- done = FcFalse;
- }
- }
- else
- {
- for (i = 0; i < os->nobject; i++)
- {
- FcValue v;
-
- /* XXX this can be optimized by accessing valuelist linked lists
- * directly and remembering where we were. Most (all) value lists
- * in normal uses are pretty short though (language tags are
- * stored as a LangSet, not separate values.). */
- FcPatternDel (subpat, os->objects[i]);
- if (FcResultMatch ==
- FcPatternGet (pat, os->objects[i], idx, &v))
- {
- FcPatternAdd (subpat, os->objects[i], v, FcFalse);
- done = FcFalse;
- }
- }
- }
-
- if (!done)
- {
- c->format = format_save;
- ret = interpret_subexpr (c, subpat, buf);
- if (!ret)
- goto bail;
- }
-
- idx++;
- } while (!done);
-
- if (c->format == format_save)
- skip_subexpr (c);
-
-bail:
- FcPatternDestroy (subpat);
-bail0:
- if (lang_strs)
- FcStrListDone (lang_strs);
- FcObjectSetDestroy (os);
-
- return ret;
-}
-
-static FcBool
-interpret_simple (FcFormatContext *c,
- FcPattern *pat,
- FcStrBuf *buf)
-{
- FcPatternElt *e;
- FcBool add_colon = FcFalse;
- FcBool add_elt_name = FcFalse;
- int idx;
- FcChar8 *else_string;
-
- if (consume_char (c, ':'))
- add_colon = FcTrue;
-
- if (!read_word (c))
- return FcFalse;
-
- idx = -1;
- if (consume_char (c, '['))
- {
- idx = strtol ((const char *) c->format, (char **) &c->format, 10);
- if (idx < 0)
- {
- message ("expected non-negative number at %d",
- c->format-1 - c->format_orig + 1);
- return FcFalse;
- }
- if (!expect_char (c, ']'))
- return FcFalse;
- }
-
- if (consume_char (c, '='))
- add_elt_name = FcTrue;
-
- /* modifiers */
- else_string = NULL;
- if (consume_char (c, ':'))
- {
- FcChar8 *orig;
- /* divert the c->word for now */
- orig = c->word;
- c->word = c->word + strlen ((const char *) c->word) + 1;
- /* for now we just support 'default value' */
- if (!expect_char (c, '-') ||
- !read_chars (c, '\0'))
- {
- c->word = orig;
- return FcFalse;
- }
- else_string = c->word;
- c->word = orig;
- }
-
- e = FcPatternObjectFindElt (pat,
- FcObjectFromName ((const char *) c->word));
- if (e || else_string)
- {
- FcValueListPtr l = NULL;
-
- if (add_colon)
- FcStrBufChar (buf, ':');
- if (add_elt_name)
- {
- FcStrBufString (buf, c->word);
- FcStrBufChar (buf, '=');
- }
-
- if (e)
- l = FcPatternEltValues(e);
-
- if (idx != -1)
- {
- while (l && idx > 0)
- {
- l = FcValueListNext(l);
- idx--;
- }
- if (l && idx == 0)
- {
- if (!FcNameUnparseValue (buf, &l->value, '\0'))
- return FcFalse;
- }
- else goto notfound;
- }
- else if (l)
- {
- FcNameUnparseValueList (buf, l, '\0');
- }
- else
- {
- notfound:
- if (else_string)
- FcStrBufString (buf, else_string);
- }
- }
-
- return FcTrue;
-}
-
-static FcBool
-cescape (FcFormatContext *c,
- const FcChar8 *str,
- FcStrBuf *buf)
-{
- while(*str)
- {
- switch (*str)
- {
- case '\\':
- case '"':
- FcStrBufChar (buf, '\\');
- break;
- }
- FcStrBufChar (buf, *str++);
- }
- return FcTrue;
-}
-
-static FcBool
-shescape (FcFormatContext *c,
- const FcChar8 *str,
- FcStrBuf *buf)
-{
- FcStrBufChar (buf, '\'');
- while(*str)
- {
- if (*str == '\'')
- FcStrBufString (buf, (const FcChar8 *) "'\\''");
- else
- FcStrBufChar (buf, *str);
- str++;
- }
- FcStrBufChar (buf, '\'');
- return FcTrue;
-}
-
-static FcBool
-xmlescape (FcFormatContext *c,
- const FcChar8 *str,
- FcStrBuf *buf)
-{
- while(*str)
- {
- switch (*str)
- {
- case '&': FcStrBufString (buf, (const FcChar8 *) "&amp;"); break;
- case '<': FcStrBufString (buf, (const FcChar8 *) "&lt;"); break;
- case '>': FcStrBufString (buf, (const FcChar8 *) "&gt;"); break;
- default: FcStrBufChar (buf, *str); break;
- }
- str++;
- }
- return FcTrue;
-}
-
-static FcBool
-delete_chars (FcFormatContext *c,
- const FcChar8 *str,
- FcStrBuf *buf)
-{
- /* XXX not UTF-8 aware */
-
- if (!expect_char (c, '(') ||
- !read_chars (c, ')') ||
- !expect_char (c, ')'))
- return FcFalse;
-
- while(*str)
- {
- FcChar8 *p;
-
- p = (FcChar8 *) strpbrk ((const char *) str, (const char *) c->word);
- if (p)
- {
- FcStrBufData (buf, str, p - str);
- str = p + 1;
- }
- else
- {
- FcStrBufString (buf, str);
- break;
- }
-
- }
-
- return FcTrue;
-}
-
-static FcBool
-escape_chars (FcFormatContext *c,
- const FcChar8 *str,
- FcStrBuf *buf)
-{
- /* XXX not UTF-8 aware */
-
- if (!expect_char (c, '(') ||
- !read_chars (c, ')') ||
- !expect_char (c, ')'))
- return FcFalse;
-
- while(*str)
- {
- FcChar8 *p;
-
- p = (FcChar8 *) strpbrk ((const char *) str, (const char *) c->word);
- if (p)
- {
- FcStrBufData (buf, str, p - str);
- FcStrBufChar (buf, c->word[0]);
- FcStrBufChar (buf, *p);
- str = p + 1;
- }
- else
- {
- FcStrBufString (buf, str);
- break;
- }
-
- }
-
- return FcTrue;
-}
-
-static FcBool
-translate_chars (FcFormatContext *c,
- const FcChar8 *str,
- FcStrBuf *buf)
-{
- char *from, *to, repeat;
- int from_len, to_len;
-
- /* XXX not UTF-8 aware */
-
- if (!expect_char (c, '(') ||
- !read_chars (c, ',') ||
- !expect_char (c, ','))
- return FcFalse;
-
- from = (char *) c->word;
- from_len = strlen (from);
- to = from + from_len + 1;
-
- /* hack: we temporarily divert c->word */
- c->word = (FcChar8 *) to;
- if (!read_chars (c, ')'))
- {
- c->word = (FcChar8 *) from;
- return FcFalse;
- }
- c->word = (FcChar8 *) from;
-
- to_len = strlen (to);
- repeat = to[to_len - 1];
-
- if (!expect_char (c, ')'))
- return FcFalse;
-
- while(*str)
- {
- FcChar8 *p;
-
- p = (FcChar8 *) strpbrk ((const char *) str, (const char *) from);
- if (p)
- {
- int i;
- FcStrBufData (buf, str, p - str);
- i = strchr (from, *p) - from;
- FcStrBufChar (buf, i < to_len ? to[i] : repeat);
- str = p + 1;
- }
- else
- {
- FcStrBufString (buf, str);
- break;
- }
-
- }
-
- return FcTrue;
-}
-
-static FcBool
-interpret_convert (FcFormatContext *c,
- FcStrBuf *buf,
- int start)
-{
- const FcChar8 *str;
- FcChar8 *new_str;
- FcStrBuf new_buf;
- FcChar8 buf_static[8192];
- FcBool ret;
-
- if (!expect_char (c, '|') ||
- !read_word (c))
- return FcFalse;
-
- /* prepare the buffer */
- FcStrBufChar (buf, '\0');
- if (buf->failed)
- return FcFalse;
- str = buf->buf + start;
- buf->len = start;
-
- /* try simple converters first */
- if (0) { }
-#define CONVERTER(name, func) \
- else if (0 == strcmp ((const char *) c->word, name))\
- do { new_str = func (str); ret = FcTrue; } while (0)
- CONVERTER ("downcase", FcStrDowncase);
- CONVERTER ("basename", FcStrBasename);
- CONVERTER ("dirname", FcStrDirname);
-#undef CONVERTER
- else
- ret = FcFalse;
-
- if (ret)
- {
- if (new_str)
- {
- FcStrBufString (buf, new_str);
- free (new_str);
- return FcTrue;
- }
- else
- return FcFalse;
- }
-
- FcStrBufInit (&new_buf, buf_static, sizeof (buf_static));
-
- /* now try our custom converters */
- if (0) { }
-#define CONVERTER(name, func) \
- else if (0 == strcmp ((const char *) c->word, name))\
- ret = func (c, str, &new_buf)
- CONVERTER ("cescape", cescape);
- CONVERTER ("shescape", shescape);
- CONVERTER ("xmlescape", xmlescape);
- CONVERTER ("delete", delete_chars);
- CONVERTER ("escape", escape_chars);
- CONVERTER ("translate", translate_chars);
-#undef CONVERTER
- else
- ret = FcFalse;
-
- if (ret)
- {
- FcStrBufChar (&new_buf, '\0');
- FcStrBufString (buf, new_buf.buf);
- }
- else
- message ("unknown converter \"%s\"",
- c->word);
-
- FcStrBufDestroy (&new_buf);
-
- return ret;
-}
-
-static FcBool
-maybe_interpret_converts (FcFormatContext *c,
- FcStrBuf *buf,
- int start)
-{
- while (*c->format == '|')
- if (!interpret_convert (c, buf, start))
- return FcFalse;
-
- return FcTrue;
-}
-
-static FcBool
-align_to_width (FcStrBuf *buf,
- int start,
- int width)
-{
- int len;
-
- if (buf->failed)
- return FcFalse;
-
- len = buf->len - start;
- if (len < -width)
- {
- /* left align */
- while (len++ < -width)
- FcStrBufChar (buf, ' ');
- }
- else if (len < width)
- {
- int old_len;
- old_len = len;
- /* right align */
- while (len++ < width)
- FcStrBufChar (buf, ' ');
- if (buf->failed)
- return FcFalse;
- len = old_len;
- memmove (buf->buf + buf->len - len,
- buf->buf + buf->len - width,
- len);
- memset (buf->buf + buf->len - width,
- ' ',
- width - len);
- }
-
- return !buf->failed;
-}
-static FcBool
-interpret_percent (FcFormatContext *c,
- FcPattern *pat,
- FcStrBuf *buf)
-{
- int width, start;
- FcBool ret;
-
- if (!expect_char (c, '%'))
- return FcFalse;
-
- if (consume_char (c, '%')) /* "%%" */
- {
- FcStrBufChar (buf, '%');
- return FcTrue;
- }
-
- /* parse an optional width specifier */
- width = strtol ((const char *) c->format, (char **) &c->format, 10);
-
- if (!expect_char (c, '{'))
- return FcFalse;
-
- start = buf->len;
-
- switch (*c->format) {
- case '=': ret = interpret_builtin (c, pat, buf); break;
- case '{': ret = interpret_subexpr (c, pat, buf); break;
- case '+': ret = interpret_filter_in (c, pat, buf); break;
- case '-': ret = interpret_filter_out (c, pat, buf); break;
- case '?': ret = interpret_cond (c, pat, buf); break;
- case '#': ret = interpret_count (c, pat, buf); break;
- case '[': ret = interpret_enumerate (c, pat, buf); break;
- default: ret = interpret_simple (c, pat, buf); break;
- }
-
- return ret &&
- maybe_interpret_converts (c, buf, start) &&
- align_to_width (buf, start, width) &&
- expect_char (c, '}');
-}
-
-static FcBool
-interpret_expr (FcFormatContext *c,
- FcPattern *pat,
- FcStrBuf *buf,
- FcChar8 term)
-{
- while (*c->format && *c->format != term)
- {
- switch (*c->format)
- {
- case '\\':
- c->format++; /* skip over '\\' */
- if (*c->format)
- FcStrBufChar (buf, escaped_char (*c->format++));
- continue;
- case '%':
- if (!interpret_percent (c, pat, buf))
- return FcFalse;
- continue;
- }
- FcStrBufChar (buf, *c->format++);
- }
- return FcTrue;
-}
-
-static FcBool
-FcPatternFormatToBuf (FcPattern *pat,
- const FcChar8 *format,
- FcStrBuf *buf)
-{
- FcFormatContext c;
- FcChar8 word_static[1024];
- FcBool ret;
-
- if (!FcFormatContextInit (&c, format, word_static, sizeof (word_static)))
- return FcFalse;
-
- ret = interpret_expr (&c, pat, buf, '\0');
-
- FcFormatContextDone (&c);
-
- return ret;
-}
-
-FcChar8 *
-FcPatternFormat (FcPattern *pat,
- const FcChar8 *format)
-{
- FcStrBuf buf;
- FcChar8 buf_static[8192 - 1024];
- FcBool ret;
-
- FcStrBufInit (&buf, buf_static, sizeof (buf_static));
-
- ret = FcPatternFormatToBuf (pat, format, &buf);
-
- if (ret)
- return FcStrBufDone (&buf);
- else
- {
- FcStrBufDestroy (&buf);
- return NULL;
- }
-}
-
-#define __fcformat__
-#include "fcaliastail.h"
-#undef __fcformat__
+/*
+ * Copyright © 2008,2009 Red Hat, Inc.
+ *
+ * Red Hat Author(s): Behdad Esfahbod
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of the author(s) not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission. The authors make no
+ * representations about the suitability of this software for any purpose. It
+ * is provided "as is" without express or implied warranty.
+ *
+ * THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "fcint.h"
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+
+
+/* The language is documented in doc/fcformat.fncs
+ * These are the features implemented:
+ *
+ * simple %{elt}
+ * width %width{elt}
+ * index %{elt[idx]}
+ * name= %{elt=}
+ * :name= %{:elt}
+ * default %{elt:-word}
+ * count %{#elt}
+ * subexpr %{{expr}}
+ * filter-out %{-elt1,elt2,elt3{expr}}
+ * filter-in %{+elt1,elt2,elt3{expr}}
+ * conditional %{?elt1,elt2,!elt3{}{}}
+ * enumerate %{[]elt1,elt2{expr}}
+ * langset langset enumeration using the same syntax
+ * builtin %{=blt}
+ * convert %{elt|conv1|conv2|conv3}
+ *
+ * converters:
+ * basename FcStrBasename
+ * dirname FcStrDirname
+ * downcase FcStrDowncase
+ * shescape
+ * cescape
+ * xmlescape
+ * delete delete chars
+ * escape escape chars
+ * translate translate chars
+ *
+ * builtins:
+ * unparse FcNameUnparse
+ * fcmatch fc-match default
+ * fclist fc-list default
+ * pkgkit PackageKit package tag format
+ *
+ *
+ * Some ideas for future syntax extensions:
+ *
+ * - verbose builtin that is like FcPatternPrint
+ * - allow indexing subexprs using '%{[idx]elt1,elt2{subexpr}}'
+ * - allow indexing in +, -, ? filtering?
+ * - conditional/filtering/deletion on binding (using '(w)'/'(s)'/'(=)' notation)
+ */
+
+
+#define FCMATCH_FORMAT "%{file:-<unknown filename>|basename}: \"%{family[0]:-<unknown family>}\" \"%{style[0]:-<unknown style>}\""
+#define FCLIST_FORMAT "%{?file{%{file}: }}%{=unparse}"
+#define PKGKIT_FORMAT "%{[]family{font(%{family|downcase|delete( )})\n}}%{[]lang{font(:lang=%{lang|downcase|translate(_,-)})\n}}"
+
+
+static void
+message (const char *fmt, ...)
+{
+ va_list args;
+ va_start (args, fmt);
+ fprintf (stderr, "Fontconfig: Pattern format error: ");
+ vfprintf (stderr, fmt, args);
+ fprintf (stderr, ".\n");
+ va_end (args);
+}
+
+
+typedef struct _FcFormatContext
+{
+ const FcChar8 *format_orig;
+ const FcChar8 *format;
+ int format_len;
+ FcChar8 *word;
+ FcBool word_allocated;
+} FcFormatContext;
+
+static FcBool
+FcFormatContextInit (FcFormatContext *c,
+ const FcChar8 *format,
+ FcChar8 *scratch,
+ int scratch_len)
+{
+ c->format_orig = c->format = format;
+ c->format_len = strlen ((const char *) format);
+
+ if (c->format_len < scratch_len)
+ {
+ c->word = scratch;
+ c->word_allocated = FcFalse;
+ }
+ else
+ {
+ c->word = malloc (c->format_len + 1);
+ c->word_allocated = FcTrue;
+ }
+
+ return c->word != NULL;
+}
+
+static void
+FcFormatContextDone (FcFormatContext *c)
+{
+ if (c && c->word_allocated)
+ {
+ free (c->word);
+ }
+}
+
+static FcBool
+consume_char (FcFormatContext *c,
+ FcChar8 term)
+{
+ if (*c->format != term)
+ return FcFalse;
+
+ c->format++;
+ return FcTrue;
+}
+
+static FcBool
+expect_char (FcFormatContext *c,
+ FcChar8 term)
+{
+ FcBool res = consume_char (c, term);
+ if (!res)
+ {
+ if (c->format == c->format_orig + c->format_len)
+ message ("format ended while expecting '%c'",
+ term);
+ else
+ message ("expected '%c' at %d",
+ term, c->format - c->format_orig + 1);
+ }
+ return res;
+}
+
+static FcBool
+FcCharIsPunct (const FcChar8 c)
+{
+ if (c < '0')
+ return FcTrue;
+ if (c <= '9')
+ return FcFalse;
+ if (c < 'A')
+ return FcTrue;
+ if (c <= 'Z')
+ return FcFalse;
+ if (c < 'a')
+ return FcTrue;
+ if (c <= 'z')
+ return FcFalse;
+ if (c <= '~')
+ return FcTrue;
+ return FcFalse;
+}
+
+static char escaped_char(const char ch)
+{
+ switch (ch) {
+ case 'a': return '\a';
+ case 'b': return '\b';
+ case 'f': return '\f';
+ case 'n': return '\n';
+ case 'r': return '\r';
+ case 't': return '\t';
+ case 'v': return '\v';
+ default: return ch;
+ }
+}
+
+static FcBool
+read_word (FcFormatContext *c)
+{
+ FcChar8 *p;
+
+ p = c->word;
+
+ while (*c->format)
+ {
+ if (*c->format == '\\')
+ {
+ c->format++;
+ if (*c->format)
+ *p++ = escaped_char (*c->format++);
+ continue;
+ }
+ else if (FcCharIsPunct (*c->format))
+ break;
+
+ *p++ = *c->format++;
+ }
+ *p = '\0';
+
+ if (p == c->word)
+ {
+ message ("expected identifier at %d",
+ c->format - c->format_orig + 1);
+ return FcFalse;
+ }
+
+ return FcTrue;
+}
+
+static FcBool
+read_chars (FcFormatContext *c,
+ FcChar8 term)
+{
+ FcChar8 *p;
+
+ p = c->word;
+
+ while (*c->format && *c->format != '}' && *c->format != term)
+ {
+ if (*c->format == '\\')
+ {
+ c->format++;
+ if (*c->format)
+ *p++ = escaped_char (*c->format++);
+ continue;
+ }
+
+ *p++ = *c->format++;
+ }
+ *p = '\0';
+
+ if (p == c->word)
+ {
+ message ("expected character data at %d",
+ c->format - c->format_orig + 1);
+ return FcFalse;
+ }
+
+ return FcTrue;
+}
+
+static FcBool
+FcPatternFormatToBuf (FcPattern *pat,
+ const FcChar8 *format,
+ FcStrBuf *buf);
+
+static FcBool
+interpret_builtin (FcFormatContext *c,
+ FcPattern *pat,
+ FcStrBuf *buf)
+{
+ FcChar8 *new_str;
+ FcBool ret;
+
+ if (!expect_char (c, '=') ||
+ !read_word (c))
+ return FcFalse;
+
+ /* try simple builtins first */
+ if (0) { }
+#define BUILTIN(name, func) \
+ else if (0 == strcmp ((const char *) c->word, name))\
+ do { new_str = func (pat); ret = FcTrue; } while (0)
+ BUILTIN ("unparse", FcNameUnparse);
+ /* BUILTIN ("verbose", FcPatternPrint); XXX */
+#undef BUILTIN
+ else
+ ret = FcFalse;
+
+ if (ret)
+ {
+ if (new_str)
+ {
+ FcStrBufString (buf, new_str);
+ free (new_str);
+ return FcTrue;
+ }
+ else
+ return FcFalse;
+ }
+
+ /* now try our custom formats */
+ if (0) { }
+#define BUILTIN(name, format) \
+ else if (0 == strcmp ((const char *) c->word, name))\
+ ret = FcPatternFormatToBuf (pat, (const FcChar8 *) format, buf)
+ BUILTIN ("fcmatch", FCMATCH_FORMAT);
+ BUILTIN ("fclist", FCLIST_FORMAT);
+ BUILTIN ("pkgkit", PKGKIT_FORMAT);
+#undef BUILTIN
+ else
+ ret = FcFalse;
+
+ if (!ret)
+ message ("unknown builtin \"%s\"",
+ c->word);
+
+ return ret;
+}
+
+static FcBool
+interpret_expr (FcFormatContext *c,
+ FcPattern *pat,
+ FcStrBuf *buf,
+ FcChar8 term);
+
+static FcBool
+interpret_subexpr (FcFormatContext *c,
+ FcPattern *pat,
+ FcStrBuf *buf)
+{
+ return expect_char (c, '{') &&
+ interpret_expr (c, pat, buf, '}') &&
+ expect_char (c, '}');
+}
+
+static FcBool
+maybe_interpret_subexpr (FcFormatContext *c,
+ FcPattern *pat,
+ FcStrBuf *buf)
+{
+ return (*c->format == '{') ?
+ interpret_subexpr (c, pat, buf) :
+ FcTrue;
+}
+
+static FcBool
+skip_subexpr (FcFormatContext *c);
+
+static FcBool
+skip_percent (FcFormatContext *c)
+{
+ int width;
+
+ if (!expect_char (c, '%'))
+ return FcFalse;
+
+ /* skip an optional width specifier */
+ width = strtol ((const char *) c->format, (char **) &c->format, 10);
+
+ if (!expect_char (c, '{'))
+ return FcFalse;
+
+ while(*c->format && *c->format != '}')
+ {
+ switch (*c->format)
+ {
+ case '\\':
+ c->format++; /* skip over '\\' */
+ if (*c->format)
+ c->format++;
+ continue;
+ case '{':
+ if (!skip_subexpr (c))
+ return FcFalse;
+ continue;
+ }
+ c->format++;
+ }
+
+ return expect_char (c, '}');
+}
+
+static FcBool
+skip_expr (FcFormatContext *c)
+{
+ while(*c->format && *c->format != '}')
+ {
+ switch (*c->format)
+ {
+ case '\\':
+ c->format++; /* skip over '\\' */
+ if (*c->format)
+ c->format++;
+ continue;
+ case '%':
+ if (!skip_percent (c))
+ return FcFalse;
+ continue;
+ }
+ c->format++;
+ }
+
+ return FcTrue;
+}
+
+static FcBool
+skip_subexpr (FcFormatContext *c)
+{
+ return expect_char (c, '{') &&
+ skip_expr (c) &&
+ expect_char (c, '}');
+}
+
+static FcBool
+maybe_skip_subexpr (FcFormatContext *c)
+{
+ return (*c->format == '{') ?
+ skip_subexpr (c) :
+ FcTrue;
+}
+
+static FcBool
+interpret_filter_in (FcFormatContext *c,
+ FcPattern *pat,
+ FcStrBuf *buf)
+{
+ FcObjectSet *os;
+ FcPattern *subpat;
+
+ if (!expect_char (c, '+'))
+ return FcFalse;
+
+ os = FcObjectSetCreate ();
+ if (!os)
+ return FcFalse;
+
+ do
+ {
+ /* XXX binding */
+ if (!read_word (c) ||
+ !FcObjectSetAdd (os, (const char *) c->word))
+ {
+ FcObjectSetDestroy (os);
+ return FcFalse;
+ }
+ }
+ while (consume_char (c, ','));
+
+ subpat = FcPatternFilter (pat, os);
+ FcObjectSetDestroy (os);
+
+ if (!subpat ||
+ !interpret_subexpr (c, subpat, buf))
+ return FcFalse;
+
+ FcPatternDestroy (subpat);
+ return FcTrue;
+}
+
+static FcBool
+interpret_filter_out (FcFormatContext *c,
+ FcPattern *pat,
+ FcStrBuf *buf)
+{
+ FcPattern *subpat;
+
+ if (!expect_char (c, '-'))
+ return FcFalse;
+
+ subpat = FcPatternDuplicate (pat);
+ if (!subpat)
+ return FcFalse;
+
+ do
+ {
+ if (!read_word (c))
+ {
+ FcPatternDestroy (subpat);
+ return FcFalse;
+ }
+
+ FcPatternDel (subpat, (const char *) c->word);
+ }
+ while (consume_char (c, ','));
+
+ if (!interpret_subexpr (c, subpat, buf))
+ return FcFalse;
+
+ FcPatternDestroy (subpat);
+ return FcTrue;
+}
+
+static FcBool
+interpret_cond (FcFormatContext *c,
+ FcPattern *pat,
+ FcStrBuf *buf)
+{
+ FcBool pass;
+
+ if (!expect_char (c, '?'))
+ return FcFalse;
+
+ pass = FcTrue;
+
+ do
+ {
+ FcBool negate;
+ FcValue v;
+
+ negate = consume_char (c, '!');
+
+ if (!read_word (c))
+ return FcFalse;
+
+ pass = pass &&
+ (negate ^
+ (FcResultMatch ==
+ FcPatternGet (pat, (const char *) c->word, 0, &v)));
+ }
+ while (consume_char (c, ','));
+
+ if (pass)
+ {
+ if (!interpret_subexpr (c, pat, buf) ||
+ !maybe_skip_subexpr (c))
+ return FcFalse;
+ }
+ else
+ {
+ if (!skip_subexpr (c) ||
+ !maybe_interpret_subexpr (c, pat, buf))
+ return FcFalse;
+ }
+
+ return FcTrue;
+}
+
+static FcBool
+interpret_count (FcFormatContext *c,
+ FcPattern *pat,
+ FcStrBuf *buf)
+{
+ int count;
+ FcPatternElt *e;
+ FcChar8 buf_static[64];
+
+ if (!expect_char (c, '#'))
+ return FcFalse;
+
+ if (!read_word (c))
+ return FcFalse;
+
+ count = 0;
+ e = FcPatternObjectFindElt (pat,
+ FcObjectFromName ((const char *) c->word));
+ if (e)
+ {
+ FcValueListPtr l;
+ count++;
+ for (l = FcPatternEltValues(e);
+ l->next;
+ l = l->next)
+ count++;
+ }
+
+ snprintf ((char *) buf_static, sizeof (buf_static), "%d", count);
+ FcStrBufString (buf, buf_static);
+
+ return FcTrue;
+}
+
+static FcBool
+interpret_enumerate (FcFormatContext *c,
+ FcPattern *pat,
+ FcStrBuf *buf)
+{
+ FcObjectSet *os;
+ FcPattern *subpat;
+ const FcChar8 *format_save;
+ int idx;
+ FcBool ret, done;
+ FcStrList *lang_strs;
+
+ if (!expect_char (c, '[') ||
+ !expect_char (c, ']'))
+ return FcFalse;
+
+ os = FcObjectSetCreate ();
+ if (!os)
+ return FcFalse;
+
+ ret = FcTrue;
+
+ do
+ {
+ if (!read_word (c) ||
+ !FcObjectSetAdd (os, (const char *) c->word))
+ {
+ FcObjectSetDestroy (os);
+ return FcFalse;
+ }
+ }
+ while (consume_char (c, ','));
+
+ /* If we have one element and it's of type FcLangSet, we want
+ * to enumerate the languages in it. */
+ lang_strs = NULL;
+ if (os->nobject == 1)
+ {
+ FcLangSet *langset;
+ if (FcResultMatch ==
+ FcPatternGetLangSet (pat, os->objects[0], 0, &langset))
+ {
+ FcStrSet *ss;
+ if (!(ss = FcLangSetGetLangs (langset)) ||
+ !(lang_strs = FcStrListCreate (ss)))
+ goto bail0;
+ }
+ }
+
+ subpat = FcPatternDuplicate (pat);
+ if (!subpat)
+ goto bail0;
+
+ format_save = c->format;
+ idx = 0;
+ do
+ {
+ int i;
+
+ done = FcTrue;
+
+ if (lang_strs)
+ {
+ FcChar8 *lang;
+
+ FcPatternDel (subpat, os->objects[0]);
+ if ((lang = FcStrListNext (lang_strs)))
+ {
+ /* XXX binding? */
+ FcPatternAddString (subpat, os->objects[0], lang);
+ done = FcFalse;
+ }
+ }
+ else
+ {
+ for (i = 0; i < os->nobject; i++)
+ {
+ FcValue v;
+
+ /* XXX this can be optimized by accessing valuelist linked lists
+ * directly and remembering where we were. Most (all) value lists
+ * in normal uses are pretty short though (language tags are
+ * stored as a LangSet, not separate values.). */
+ FcPatternDel (subpat, os->objects[i]);
+ if (FcResultMatch ==
+ FcPatternGet (pat, os->objects[i], idx, &v))
+ {
+ /* XXX binding */
+ FcPatternAdd (subpat, os->objects[i], v, FcFalse);
+ done = FcFalse;
+ }
+ }
+ }
+
+ if (!done)
+ {
+ c->format = format_save;
+ ret = interpret_subexpr (c, subpat, buf);
+ if (!ret)
+ goto bail;
+ }
+
+ idx++;
+ } while (!done);
+
+ if (c->format == format_save)
+ skip_subexpr (c);
+
+bail:
+ FcPatternDestroy (subpat);
+bail0:
+ if (lang_strs)
+ FcStrListDone (lang_strs);
+ FcObjectSetDestroy (os);
+
+ return ret;
+}
+
+static FcBool
+interpret_simple (FcFormatContext *c,
+ FcPattern *pat,
+ FcStrBuf *buf)
+{
+ FcPatternElt *e;
+ FcBool add_colon = FcFalse;
+ FcBool add_elt_name = FcFalse;
+ int idx;
+ FcChar8 *else_string;
+
+ if (consume_char (c, ':'))
+ add_colon = FcTrue;
+
+ if (!read_word (c))
+ return FcFalse;
+
+ idx = -1;
+ if (consume_char (c, '['))
+ {
+ idx = strtol ((const char *) c->format, (char **) &c->format, 10);
+ if (idx < 0)
+ {
+ message ("expected non-negative number at %d",
+ c->format-1 - c->format_orig + 1);
+ return FcFalse;
+ }
+ if (!expect_char (c, ']'))
+ return FcFalse;
+ }
+
+ if (consume_char (c, '='))
+ add_elt_name = FcTrue;
+
+ /* modifiers */
+ else_string = NULL;
+ if (consume_char (c, ':'))
+ {
+ FcChar8 *orig;
+ /* divert the c->word for now */
+ orig = c->word;
+ c->word = c->word + strlen ((const char *) c->word) + 1;
+ /* for now we just support 'default value' */
+ if (!expect_char (c, '-') ||
+ !read_chars (c, '\0'))
+ {
+ c->word = orig;
+ return FcFalse;
+ }
+ else_string = c->word;
+ c->word = orig;
+ }
+
+ e = FcPatternObjectFindElt (pat,
+ FcObjectFromName ((const char *) c->word));
+ if (e || else_string)
+ {
+ FcValueListPtr l = NULL;
+
+ if (add_colon)
+ FcStrBufChar (buf, ':');
+ if (add_elt_name)
+ {
+ FcStrBufString (buf, c->word);
+ FcStrBufChar (buf, '=');
+ }
+
+ if (e)
+ l = FcPatternEltValues(e);
+
+ if (idx != -1)
+ {
+ while (l && idx > 0)
+ {
+ l = FcValueListNext(l);
+ idx--;
+ }
+ if (l && idx == 0)
+ {
+ if (!FcNameUnparseValue (buf, &l->value, '\0'))
+ return FcFalse;
+ }
+ else goto notfound;
+ }
+ else if (l)
+ {
+ FcNameUnparseValueList (buf, l, '\0');
+ }
+ else
+ {
+ notfound:
+ if (else_string)
+ FcStrBufString (buf, else_string);
+ }
+ }
+
+ return FcTrue;
+}
+
+static FcBool
+cescape (FcFormatContext *c,
+ const FcChar8 *str,
+ FcStrBuf *buf)
+{
+ /* XXX escape \n etc? */
+
+ while(*str)
+ {
+ switch (*str)
+ {
+ case '\\':
+ case '"':
+ FcStrBufChar (buf, '\\');
+ break;
+ }
+ FcStrBufChar (buf, *str++);
+ }
+ return FcTrue;
+}
+
+static FcBool
+shescape (FcFormatContext *c,
+ const FcChar8 *str,
+ FcStrBuf *buf)
+{
+ FcStrBufChar (buf, '\'');
+ while(*str)
+ {
+ if (*str == '\'')
+ FcStrBufString (buf, (const FcChar8 *) "'\\''");
+ else
+ FcStrBufChar (buf, *str);
+ str++;
+ }
+ FcStrBufChar (buf, '\'');
+ return FcTrue;
+}
+
+static FcBool
+xmlescape (FcFormatContext *c,
+ const FcChar8 *str,
+ FcStrBuf *buf)
+{
+ /* XXX escape \n etc? */
+
+ while(*str)
+ {
+ switch (*str)
+ {
+ case '&': FcStrBufString (buf, (const FcChar8 *) "&amp;"); break;
+ case '<': FcStrBufString (buf, (const FcChar8 *) "&lt;"); break;
+ case '>': FcStrBufString (buf, (const FcChar8 *) "&gt;"); break;
+ default: FcStrBufChar (buf, *str); break;
+ }
+ str++;
+ }
+ return FcTrue;
+}
+
+static FcBool
+delete_chars (FcFormatContext *c,
+ const FcChar8 *str,
+ FcStrBuf *buf)
+{
+ /* XXX not UTF-8 aware */
+
+ if (!expect_char (c, '(') ||
+ !read_chars (c, ')') ||
+ !expect_char (c, ')'))
+ return FcFalse;
+
+ while(*str)
+ {
+ FcChar8 *p;
+
+ p = (FcChar8 *) strpbrk ((const char *) str, (const char *) c->word);
+ if (p)
+ {
+ FcStrBufData (buf, str, p - str);
+ str = p + 1;
+ }
+ else
+ {
+ FcStrBufString (buf, str);
+ break;
+ }
+
+ }
+
+ return FcTrue;
+}
+
+static FcBool
+escape_chars (FcFormatContext *c,
+ const FcChar8 *str,
+ FcStrBuf *buf)
+{
+ /* XXX not UTF-8 aware */
+
+ if (!expect_char (c, '(') ||
+ !read_chars (c, ')') ||
+ !expect_char (c, ')'))
+ return FcFalse;
+
+ while(*str)
+ {
+ FcChar8 *p;
+
+ p = (FcChar8 *) strpbrk ((const char *) str, (const char *) c->word);
+ if (p)
+ {
+ FcStrBufData (buf, str, p - str);
+ FcStrBufChar (buf, c->word[0]);
+ FcStrBufChar (buf, *p);
+ str = p + 1;
+ }
+ else
+ {
+ FcStrBufString (buf, str);
+ break;
+ }
+
+ }
+
+ return FcTrue;
+}
+
+static FcBool
+translate_chars (FcFormatContext *c,
+ const FcChar8 *str,
+ FcStrBuf *buf)
+{
+ char *from, *to, repeat;
+ int from_len, to_len;
+
+ /* XXX not UTF-8 aware */
+
+ if (!expect_char (c, '(') ||
+ !read_chars (c, ',') ||
+ !expect_char (c, ','))
+ return FcFalse;
+
+ from = (char *) c->word;
+ from_len = strlen (from);
+ to = from + from_len + 1;
+
+ /* hack: we temporarily divert c->word */
+ c->word = (FcChar8 *) to;
+ if (!read_chars (c, ')'))
+ {
+ c->word = (FcChar8 *) from;
+ return FcFalse;
+ }
+ c->word = (FcChar8 *) from;
+
+ to_len = strlen (to);
+ repeat = to[to_len - 1];
+
+ if (!expect_char (c, ')'))
+ return FcFalse;
+
+ while(*str)
+ {
+ FcChar8 *p;
+
+ p = (FcChar8 *) strpbrk ((const char *) str, (const char *) from);
+ if (p)
+ {
+ int i;
+ FcStrBufData (buf, str, p - str);
+ i = strchr (from, *p) - from;
+ FcStrBufChar (buf, i < to_len ? to[i] : repeat);
+ str = p + 1;
+ }
+ else
+ {
+ FcStrBufString (buf, str);
+ break;
+ }
+
+ }
+
+ return FcTrue;
+}
+
+static FcBool
+interpret_convert (FcFormatContext *c,
+ FcStrBuf *buf,
+ int start)
+{
+ const FcChar8 *str;
+ FcChar8 *new_str;
+ FcStrBuf new_buf;
+ FcChar8 buf_static[8192];
+ FcBool ret;
+
+ if (!expect_char (c, '|') ||
+ !read_word (c))
+ return FcFalse;
+
+ /* prepare the buffer */
+ FcStrBufChar (buf, '\0');
+ if (buf->failed)
+ return FcFalse;
+ str = buf->buf + start;
+ buf->len = start;
+
+ /* try simple converters first */
+ if (0) { }
+#define CONVERTER(name, func) \
+ else if (0 == strcmp ((const char *) c->word, name))\
+ do { new_str = func (str); ret = FcTrue; } while (0)
+ CONVERTER ("downcase", FcStrDowncase);
+ CONVERTER ("basename", FcStrBasename);
+ CONVERTER ("dirname", FcStrDirname);
+#undef CONVERTER
+ else
+ ret = FcFalse;
+
+ if (ret)
+ {
+ if (new_str)
+ {
+ FcStrBufString (buf, new_str);
+ free (new_str);
+ return FcTrue;
+ }
+ else
+ return FcFalse;
+ }
+
+ FcStrBufInit (&new_buf, buf_static, sizeof (buf_static));
+
+ /* now try our custom converters */
+ if (0) { }
+#define CONVERTER(name, func) \
+ else if (0 == strcmp ((const char *) c->word, name))\
+ ret = func (c, str, &new_buf)
+ CONVERTER ("cescape", cescape);
+ CONVERTER ("shescape", shescape);
+ CONVERTER ("xmlescape", xmlescape);
+ CONVERTER ("delete", delete_chars);
+ CONVERTER ("escape", escape_chars);
+ CONVERTER ("translate", translate_chars);
+#undef CONVERTER
+ else
+ ret = FcFalse;
+
+ if (ret)
+ {
+ FcStrBufChar (&new_buf, '\0');
+ FcStrBufString (buf, new_buf.buf);
+ }
+ else
+ message ("unknown converter \"%s\"",
+ c->word);
+
+ FcStrBufDestroy (&new_buf);
+
+ return ret;
+}
+
+static FcBool
+maybe_interpret_converts (FcFormatContext *c,
+ FcStrBuf *buf,
+ int start)
+{
+ while (*c->format == '|')
+ if (!interpret_convert (c, buf, start))
+ return FcFalse;
+
+ return FcTrue;
+}
+
+static FcBool
+align_to_width (FcStrBuf *buf,
+ int start,
+ int width)
+{
+ int len;
+
+ if (buf->failed)
+ return FcFalse;
+
+ len = buf->len - start;
+ if (len < -width)
+ {
+ /* left align */
+ while (len++ < -width)
+ FcStrBufChar (buf, ' ');
+ }
+ else if (len < width)
+ {
+ int old_len;
+ old_len = len;
+ /* right align */
+ while (len++ < width)
+ FcStrBufChar (buf, ' ');
+ if (buf->failed)
+ return FcFalse;
+ len = old_len;
+ memmove (buf->buf + buf->len - len,
+ buf->buf + buf->len - width,
+ len);
+ memset (buf->buf + buf->len - width,
+ ' ',
+ width - len);
+ }
+
+ return !buf->failed;
+}
+static FcBool
+interpret_percent (FcFormatContext *c,
+ FcPattern *pat,
+ FcStrBuf *buf)
+{
+ int width, start;
+ FcBool ret;
+
+ if (!expect_char (c, '%'))
+ return FcFalse;
+
+ if (consume_char (c, '%')) /* "%%" */
+ {
+ FcStrBufChar (buf, '%');
+ return FcTrue;
+ }
+
+ /* parse an optional width specifier */
+ width = strtol ((const char *) c->format, (char **) &c->format, 10);
+
+ if (!expect_char (c, '{'))
+ return FcFalse;
+
+ start = buf->len;
+
+ switch (*c->format) {
+ case '=': ret = interpret_builtin (c, pat, buf); break;
+ case '{': ret = interpret_subexpr (c, pat, buf); break;
+ case '+': ret = interpret_filter_in (c, pat, buf); break;
+ case '-': ret = interpret_filter_out (c, pat, buf); break;
+ case '?': ret = interpret_cond (c, pat, buf); break;
+ case '#': ret = interpret_count (c, pat, buf); break;
+ case '[': ret = interpret_enumerate (c, pat, buf); break;
+ default: ret = interpret_simple (c, pat, buf); break;
+ }
+
+ return ret &&
+ maybe_interpret_converts (c, buf, start) &&
+ align_to_width (buf, start, width) &&
+ expect_char (c, '}');
+}
+
+static FcBool
+interpret_expr (FcFormatContext *c,
+ FcPattern *pat,
+ FcStrBuf *buf,
+ FcChar8 term)
+{
+ while (*c->format && *c->format != term)
+ {
+ switch (*c->format)
+ {
+ case '\\':
+ c->format++; /* skip over '\\' */
+ if (*c->format)
+ FcStrBufChar (buf, escaped_char (*c->format++));
+ continue;
+ case '%':
+ if (!interpret_percent (c, pat, buf))
+ return FcFalse;
+ continue;
+ }
+ FcStrBufChar (buf, *c->format++);
+ }
+ return FcTrue;
+}
+
+static FcBool
+FcPatternFormatToBuf (FcPattern *pat,
+ const FcChar8 *format,
+ FcStrBuf *buf)
+{
+ FcFormatContext c;
+ FcChar8 word_static[1024];
+ FcBool ret;
+
+ if (!FcFormatContextInit (&c, format, word_static, sizeof (word_static)))
+ return FcFalse;
+
+ ret = interpret_expr (&c, pat, buf, '\0');
+
+ FcFormatContextDone (&c);
+
+ return ret;
+}
+
+FcChar8 *
+FcPatternFormat (FcPattern *pat,
+ const FcChar8 *format)
+{
+ FcStrBuf buf;
+ FcChar8 buf_static[8192 - 1024];
+ FcBool ret;
+
+ FcStrBufInit (&buf, buf_static, sizeof (buf_static));
+
+ ret = FcPatternFormatToBuf (pat, format, &buf);
+
+ if (ret)
+ return FcStrBufDone (&buf);
+ else
+ {
+ FcStrBufDestroy (&buf);
+ return NULL;
+ }
+}
+
+#define __fcformat__
+#include "fcaliastail.h"
+#undef __fcformat__
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-14 02:15:19 +0000