X-Git-Url: https://git.wh0rd.org/?a=blobdiff_plain;f=src%2Ffcformat.c;h=d8518f458252fba1abc6ee4b54111807c750a7c7;hb=HEAD;hp=a780f56db36d27dc807887cddff69774ce7b2d58;hpb=c493c3b770ab12ab1c61a4fb10419c490d2b5ba6;p=fontconfig.git diff --git a/src/fcformat.c b/src/fcformat.c index a780f56..d8518f4 100644 --- a/src/fcformat.c +++ b/src/fcformat.c @@ -1,5 +1,5 @@ /* - * Copyright © 2008 Red Hat, Inc. + * Copyright © 2008,2009 Red Hat, Inc. * * Red Hat Author(s): Behdad Esfahbod * @@ -7,15 +7,15 @@ * 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 + * 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. Keith Packard makes no + * 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. * - * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, + * THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO - * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR + * 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 @@ -28,166 +28,1185 @@ #include +/* 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 + * fccat fc-cat 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 FCCAT_FORMAT "\"%{file|basename|cescape}\" %{index} \"%{-file{%{=unparse|cescape}}}\"" +#define FCMATCH_FORMAT "%{file:-|basename}: \"%{family[0]:-}\" \"%{style[0]:-}\"" +#define FCLIST_FORMAT "%{?file{%{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: "); + fprintf (stderr, "Fontconfig: Pattern format error: "); vfprintf (stderr, fmt, args); - fprintf (stderr, "\n"); + fprintf (stderr, ".\n"); va_end (args); } -static FcChar8 *scratch1; -static FcChar8 *scratch2; -static const FcChar8 *format_orig; +typedef struct _FcFormatContext +{ + const FcChar8 *format_orig; + const FcChar8 *format; + int format_len; + FcChar8 *word; + FcBool word_allocated; +} FcFormatContext; -static const FcChar8 * -interpret_percent (FcPattern *pat, - FcStrBuf *buf, - const FcChar8 *format) +static FcBool +FcFormatContextInit (FcFormatContext *c, + const FcChar8 *format, + FcChar8 *scratch, + int scratch_len) { - int width, before; + c->format_orig = c->format = format; + c->format_len = strlen ((const char *) format); - /* parse an optional width specifier */ - width = strtol (format, (char **) &format, 10); + 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; + } - before = buf->len; + return c->word != NULL; +} - switch (*format) { - case '{': +static void +FcFormatContextDone (FcFormatContext *c) +{ + if (c && c->word_allocated) { - FcChar8 *p; - FcPatternElt *e; + free (c->word); + } +} - format++; /* skip over '{' */ +static FcBool +consume_char (FcFormatContext *c, + FcChar8 term) +{ + if (*c->format != term) + return FcFalse; - p = (FcChar8 *) strpbrk ((const char *) format, "}"); - if (!p) + 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 == '\\') { - message ("Pattern format missing closing brace"); + 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; } - /* extract the element name */ - memcpy (scratch1, format, p - format); - scratch1[p - format] = '\0'; - e = FcPatternObjectFindElt (pat, FcObjectFromName ((const char *) scratch1)); - if (e) + *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) { - FcValueListPtr l; + 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 ("fccat", FCCAT_FORMAT); + 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, '|')) + { + 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; +} - p++; /* skip over '}' */ - format = p; - break; +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++); } - default: - message ("Pattern format has invalid character after '%%' at %d", - format - format_orig); - break; + 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? */ - /* align to width */ - if (!buf->failed) + while(*str) { - int after, len; + switch (*str) + { + case '&': FcStrBufString (buf, (const FcChar8 *) "&"); break; + case '<': FcStrBufString (buf, (const FcChar8 *) "<"); break; + case '>': FcStrBufString (buf, (const FcChar8 *) ">"); break; + default: FcStrBufChar (buf, *str); break; + } + str++; + } + return FcTrue; +} - after = buf->len; +static FcBool +delete_chars (FcFormatContext *c, + const FcChar8 *str, + FcStrBuf *buf) +{ + /* XXX not UTF-8 aware */ - len = after - before; + if (!expect_char (c, '(') || + !read_chars (c, ')') || + !expect_char (c, ')')) + return FcFalse; - if (len < -width) + while(*str) + { + FcChar8 *p; + + p = (FcChar8 *) strpbrk ((const char *) str, (const char *) c->word); + if (p) { - /* left align */ - while (len++ < -width) - FcStrBufChar (buf, ' '); + FcStrBufData (buf, str, p - str); + str = p + 1; } - else if (len < width) + else { - /* right align */ - while (len++ < width) - FcStrBufChar (buf, ' '); - len = after - before; - memmove (buf->buf + buf->len - len, - buf->buf + buf->len - width, - len); - memset (buf->buf + buf->len - width, - ' ', - width - len); + FcStrBufString (buf, str); + break; } + } - return format; + return FcTrue; } -static char escaped_char(const char ch) +static FcBool +escape_chars (FcFormatContext *c, + const FcChar8 *str, + FcStrBuf *buf) { - 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; + /* 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 const FcChar8 * -interpret (FcPattern *pat, - FcStrBuf *buf, - const FcChar8 *format, - FcChar8 term) +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) { - const FcChar8 *end; + int width, start; + FcBool ret; + + if (!expect_char (c, '%')) + return FcFalse; - for (end = format; *end && *end != term;) + if (consume_char (c, '%')) /* "%%" */ { - switch (*end) + 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 '\\': - end++; /* skip over '\\' */ - FcStrBufChar (buf, escaped_char (*end++)); + c->format++; /* skip over '\\' */ + if (*c->format) + FcStrBufChar (buf, escaped_char (*c->format++)); continue; case '%': - end++; /* skip over '%' */ - if (*end == '%') - break; - end = interpret_percent (pat, buf, end); + if (!interpret_percent (c, pat, buf)) + return FcFalse; continue; } - FcStrBufChar (buf, *end); - end++; + FcStrBufChar (buf, *c->format++); } - if (*end != term) - message ("Pattern format ended while looking for '%c'", term); + 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; - return end; + ret = interpret_expr (&c, pat, buf, '\0'); + + FcFormatContextDone (&c); + + return ret; } FcChar8 * -FcPatternFormat (FcPattern *pat, const FcChar8 *format) +FcPatternFormat (FcPattern *pat, + const FcChar8 *format) { - int len; - FcStrBuf buf; + FcStrBuf buf; + FcChar8 buf_static[8192 - 1024]; + FcBool ret; - FcStrBufInit (&buf, 0, 0); - len = strlen ((const char *) format); - scratch1 = malloc (len); - scratch2 = malloc (len); - format_orig = format; + FcStrBufInit (&buf, buf_static, sizeof (buf_static)); - interpret (pat, &buf, format, '\0'); + ret = FcPatternFormatToBuf (pat, format, &buf); - free (scratch1); - free (scratch2); - return FcStrBufDone (&buf); + if (ret) + return FcStrBufDone (&buf); + else + { + FcStrBufDestroy (&buf); + return NULL; + } } #define __fcformat__