#undef skel_wrap
#define skel_wrap() 1
-#define FLEX_NO_OBSTACK
#define FLEX_PREFIX(Id) skel_ ## Id
#include "flex-scanner.h"
#include "files.h"
#include "scan-skel.h"
-int skel_lex (void);
+#define YY_DECL static int skel_lex (void)
+YY_DECL;
#define QPUTS(String) \
fputs (quotearg_style (c_quoting_style, String), yyout)
-static char *decode_at_digraphs (char *in);
+static void fail_for_at_directive_too_many_args (void);
+static void fail_for_invalid_at (char const *at);
+
+/* In SC_AT_DIRECTIVE_ARG context, the name of the directive. */
+static char *at_directive_name;
+
+/* Currently, only the @warn, @complain, and @fatal directives take multiple
+ arguments, and they already can't take more than 5. */
+#define AT_DIRECTIVE_ARGC_MAX 5
+static int at_directive_argc = 0;
+static char *at_directive_argv[AT_DIRECTIVE_ARGC_MAX];
%}
+
+%x SC_AT_DIRECTIVE_ARG
+%x SC_AT_DIRECTIVE_SKIP_WS
+
%%
%{
char *outname = NULL;
%}
-"@output ".*\n {
- char *file_name = yytext + sizeof "@output " - 1;
- yytext[yyleng - 1] = '\0';
- if (outname)
- {
- free (outname);
- xfclose (yyout);
- }
- outname = decode_at_digraphs (file_name);
- output_file_name_check (outname);
- yyout = xfopen (outname, "w");
- lineno = 1;
-}
-
"@@" fputc ('@', yyout);
"@{" fputc ('[', yyout);
"@}" fputc (']', yyout);
"@ofile@" QPUTS (outname);
"@dir_prefix@" QPUTS (dir_prefix);
-"@basename(".*"@)" {
- char *file_name = yytext + sizeof "@basename " - 1;
- yytext[yyleng - 2] = '\0';
- file_name = decode_at_digraphs (file_name);
- fputs (last_component (file_name), yyout);
- free (file_name);
+@[a-z_]+"(" {
+ yytext[yyleng-1] = '\0';
+ at_directive_name = xstrdup (yytext);
+ BEGIN SC_AT_DIRECTIVE_ARG;
}
/* This pattern must not match more than the previous @ patterns. */
-@[^{}@\n]* fatal ("invalid @ in skeleton: %s", yytext);
+@[^@{}(\n]* fail_for_invalid_at (yytext);
\n lineno++; ECHO;
[^@\n]+ ECHO;
-<<EOF>> {
+<INITIAL><<EOF>> {
if (outname)
{
free (outname);
}
return EOF;
}
+
+<SC_AT_DIRECTIVE_ARG>{
+ [^@\n]+ { STRING_GROW; }
+ \n { ++lineno; STRING_GROW; }
+
+ "@@" { obstack_1grow (&obstack_for_string, '@'); }
+ "@{" { obstack_1grow (&obstack_for_string, '['); }
+ "@}" { obstack_1grow (&obstack_for_string, ']'); }
+ "@`" /* Emtpy. Useful for starting an argument
+ that begins with whitespace. */
+
+ @[,)] {
+ if (at_directive_argc >= AT_DIRECTIVE_ARGC_MAX)
+ fail_for_at_directive_too_many_args ();
+
+ obstack_1grow (&obstack_for_string, '\0');
+ at_directive_argv[at_directive_argc++] =
+ obstack_finish (&obstack_for_string);
+
+ /* Like M4, skip whitespace after a comma. */
+ if (yytext[1] == ',')
+ BEGIN SC_AT_DIRECTIVE_SKIP_WS;
+ else
+ {
+ if (0 == strcmp (at_directive_name, "@basename"))
+ {
+ if (at_directive_argc > 1)
+ fail_for_at_directive_too_many_args ();
+ fputs (last_component (at_directive_argv[0]), yyout);
+ }
+ else if (0 == strcmp (at_directive_name, "@warn")
+ || 0 == strcmp (at_directive_name, "@complain")
+ || 0 == strcmp (at_directive_name, "@fatal"))
+ {
+ void (*func)(char const *, ...);
+ switch (at_directive_name[1])
+ {
+ case 'w': func = warn; break;
+ case 'c': func = complain; break;
+ case 'f': func = fatal; break;
+ default: aver (false); func = NULL; break;
+ }
+ switch (at_directive_argc)
+ {
+ case 1:
+ func (_(at_directive_argv[0]));
+ break;
+ case 2:
+ func (_(at_directive_argv[0]), at_directive_argv[1]);
+ break;
+ case 3:
+ func (_(at_directive_argv[0]), at_directive_argv[1],
+ at_directive_argv[2]);
+ break;
+ case 4:
+ func (_(at_directive_argv[0]), at_directive_argv[1],
+ at_directive_argv[2], at_directive_argv[3]);
+ break;
+ case 5:
+ func (_(at_directive_argv[0]), at_directive_argv[1],
+ at_directive_argv[2], at_directive_argv[3],
+ at_directive_argv[4]);
+ break;
+ default:
+ fail_for_at_directive_too_many_args ();
+ break;
+ }
+ }
+ else if (0 == strcmp (at_directive_name, "@output"))
+ {
+ if (at_directive_argc > 1)
+ fail_for_at_directive_too_many_args ();
+ if (outname)
+ {
+ free (outname);
+ xfclose (yyout);
+ }
+ outname = xstrdup (at_directive_argv[0]);
+ output_file_name_check (outname);
+ yyout = xfopen (outname, "w");
+ lineno = 1;
+ }
+ else
+ fail_for_invalid_at (at_directive_name);
+
+ obstack_free (&obstack_for_string, at_directive_argv[0]);
+ at_directive_argc = 0;
+ free (at_directive_name);
+ BEGIN INITIAL;
+ }
+ }
+
+ @.? { fail_for_invalid_at (yytext); }
+}
+
+<SC_AT_DIRECTIVE_SKIP_WS>{
+ [ \t\r]
+ \n { ++lineno; }
+ . { yyless (0); BEGIN SC_AT_DIRECTIVE_ARG; }
+}
+
+<SC_AT_DIRECTIVE_ARG,SC_AT_DIRECTIVE_SKIP_WS>{
+ <<EOF>> {
+ fatal (_("unclosed %s directive in skeleton"), at_directive_name);
+ }
+}
+
%%
/*------------------------.
void
scan_skel (FILE *in)
{
+ static bool initialized = false;
+ if (!initialized)
+ {
+ initialized = true;
+ obstack_init (&obstack_for_string);
+ }
skel_in = in;
skel__flex_debug = trace_flag & trace_skeleton;
skel_lex ();
yylex_destroy ();
}
-static char *
-decode_at_digraphs (char *in)
+static void
+fail_for_at_directive_too_many_args (void)
{
- char *out_start = xnmalloc (strlen (in)+1, sizeof *out_start);
- char *out;
- for (out = out_start; *in != '\0'; ++in, ++out)
- {
- if (*in == '@')
- {
- switch (*++in)
- {
- case '@': *out = '@'; break;
- case '{': *out = '['; break;
- case '}': *out = ']'; break;
- default:
- if (*in != '\0')
- in[1] = '\0';
- fatal ("invalid @ in skeleton: %s", in-1);
- break;
- }
- }
- else
- *out = *in;
- }
- *out = '\0';
- return out_start;
+ fatal (_("too many arguments for %s directive in skeleton"),
+ at_directive_name);
+}
+
+static void
+fail_for_invalid_at (char const *at)
+{
+ fatal ("invalid @ in skeleton: %s", at);
+}
+
+void
+skel_scanner_free (void)
+{
+ obstack_free (&obstack_for_string, 0);
}
projects / bison.git / blobdiff