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/*
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* Copyright © 2011 , 2012 Google , Inc .
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*
* This is part of HarfBuzz , a text shaping library .
*
* Permission is hereby granted , without written agreement and without
* license or royalty fees , to use , copy , modify , and distribute this
* software and its documentation for any purpose , provided that the
* above copyright notice and the following two paragraphs appear in
* all copies of this software .
*
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
* DIRECT , INDIRECT , SPECIAL , INCIDENTAL , OR CONSEQUENTIAL DAMAGES
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION , EVEN
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE .
*
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES , INCLUDING ,
* BUT NOT LIMITED TO , THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE . THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN " AS IS " BASIS , AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE , SUPPORT , UPDATES , ENHANCEMENTS , OR MODIFICATIONS .
*
* Google Author ( s ) : Behdad Esfahbod
*/
# include "options.hh"
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static gboolean
parse_text ( const char * name G_GNUC_UNUSED ,
const char * arg ,
gpointer data ,
GError * * error G_GNUC_UNUSED )
{
text_options_t * text_opts = ( text_options_t * ) data ;
if ( text_opts - > text )
{
g_set_error ( error , G_OPTION_ERROR , G_OPTION_ERROR_BAD_VALUE ,
" Either --text or --unicodes can be provided but not both " ) ;
return false ;
}
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text_opts - > text_len = - 1 ;
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text_opts - > text = g_strdup ( arg ) ;
return true ;
}
static gboolean
parse_unicodes ( const char * name G_GNUC_UNUSED ,
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const char * arg ,
gpointer data ,
GError * * error G_GNUC_UNUSED )
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{
text_options_t * text_opts = ( text_options_t * ) data ;
if ( text_opts - > text )
{
g_set_error ( error , G_OPTION_ERROR , G_OPTION_ERROR_BAD_VALUE ,
" Either --text or --unicodes can be provided but not both " ) ;
return false ;
}
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GString * gs = g_string_new ( nullptr ) ;
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if ( 0 = = strcmp ( arg , " * " ) )
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{
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g_string_append_c ( gs , ' * ' ) ;
}
else
{
char * s = ( char * ) arg ;
char * p ;
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while ( s & & * s )
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{
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# define DELIMITERS "<+>{},;&#\\xXuUnNiI\n\t\v\f\r "
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while ( * s & & strchr ( DELIMITERS , * s ) )
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s + + ;
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if ( ! * s )
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break ;
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errno = 0 ;
hb_codepoint_t u = strtoul ( s , & p , 16 ) ;
if ( errno | | s = = p )
{
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g_string_free ( gs , TRUE ) ;
g_set_error ( error , G_OPTION_ERROR , G_OPTION_ERROR_BAD_VALUE ,
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" Failed parsing Unicode values at: '%s' " , s ) ;
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return false ;
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}
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g_string_append_unichar ( gs , u ) ;
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s = p ;
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}
}
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text_opts - > text_len = gs - > len ;
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text_opts - > text = g_string_free ( gs , FALSE ) ;
return true ;
}
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void
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text_options_t : : add_options ( option_parser_t * parser )
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{
GOptionEntry entries [ ] =
{
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{ " text " , 0 , 0 , G_OPTION_ARG_CALLBACK , ( gpointer ) & parse_text , " Set input text " , " string " } ,
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{ " text-file " , 0 , 0 , G_OPTION_ARG_STRING , & this - > text_file , " Set input text file-name \n \n If no text is provided, standard input is used for input. \n " , " filename " } ,
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{ " unicodes " , ' u ' , 0 , G_OPTION_ARG_CALLBACK , ( gpointer ) & parse_unicodes , " Set input Unicode codepoints " , " list of hex numbers " } ,
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{ " text-before " , 0 , 0 , G_OPTION_ARG_STRING , & this - > text_before , " Set text context before each line " , " string " } ,
{ " text-after " , 0 , 0 , G_OPTION_ARG_STRING , & this - > text_after , " Set text context after each line " , " string " } ,
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{ nullptr }
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} ;
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parser - > add_group ( entries ,
" text " ,
" Text options: " ,
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" Options for the input text " ,
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this ) ;
}
const char *
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text_options_t : : get_line ( unsigned int * len , int eol )
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{
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if ( text ) {
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if ( ! line )
{
line = text ;
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line_len = text_len ;
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}
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if ( line_len = = UINT_MAX )
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line_len = strlen ( line ) ;
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if ( ! line_len ) {
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* len = 0 ;
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return nullptr ;
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}
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const char * ret = line ;
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const char * p = ( const char * ) memchr ( line , eol , line_len ) ;
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unsigned int ret_len ;
if ( ! p ) {
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ret_len = line_len ;
line + = ret_len ;
line_len = 0 ;
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} else {
ret_len = p - ret ;
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line + = ret_len + 1 ;
line_len - = ret_len + 1 ;
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}
* len = ret_len ;
return ret ;
}
if ( ! fp ) {
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if ( ! text_file )
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fail ( true , " At least one of text or text-file must be set " ) ;
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if ( 0 ! = strcmp ( text_file , " - " ) )
fp = fopen ( text_file , " r " ) ;
else
fp = stdin ;
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if ( ! fp )
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fail ( false , " Failed opening text file `%s': %s " ,
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text_file , strerror ( errno ) ) ;
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gs = g_string_new ( nullptr ) ;
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}
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g_string_set_size ( gs , 0 ) ;
char buf [ BUFSIZ ] ;
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while ( fgets ( buf , sizeof ( buf ) , fp ) )
{
unsigned bytes = strlen ( buf ) ;
if ( bytes & & ( int ) ( unsigned char ) buf [ bytes - 1 ] = = eol )
{
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bytes - - ;
g_string_append_len ( gs , buf , bytes ) ;
break ;
}
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g_string_append_len ( gs , buf , bytes ) ;
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}
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if ( ferror ( fp ) )
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fail ( false , " Failed reading text: %s " , strerror ( errno ) ) ;
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* len = gs - > len ;
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return ! * len & & feof ( fp ) ? nullptr : gs - > str ;
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}