/* Open and close files for bison,
- Copyright 1984, 1986, 1989, 1992, 2000 Free Software Foundation, Inc.
+ Copyright 1984, 1986, 1989, 1992, 2000, 2001 Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
#include "system.h"
#include "getargs.h"
#include "files.h"
-#include "xalloc.h"
#include "gram.h"
+#include "error.h"
#include "complain.h"
FILE *finput = NULL;
-FILE *foutput = NULL;
struct obstack action_obstack;
struct obstack attrs_obstack;
-struct obstack table_obstack;
-struct obstack defines_obstack;
-struct obstack guard_obstack;
-
-char *spec_outfile; /* for -o. */
-char *spec_file_prefix; /* for -b. */
-char *spec_name_prefix; /* for -p. */
-
-char *infile;
-char *attrsfile;
-
-static char *base_name;
-static char *short_base_name;
-
+struct obstack output_obstack;
+
+/* Initializing some values below (such SPEC_NAME_PREFIX to `yy') is
+ tempting, but don't do that: for the time being our handling of the
+ %directive vs --option leaves precedence to the options by deciding
+ that if a %directive sets a variable which is really set (i.e., not
+ NULL), then the %directive is ignored. As a result, %name-prefix,
+ for instance, will not be honored. */
+
+char *spec_outfile = NULL; /* for -o. */
+char *spec_file_prefix = NULL; /* for -b. */
+const char *spec_name_prefix = NULL; /* for -p. */
+char *spec_verbose_file = NULL; /* for --verbose. */
+char *spec_graph_file = NULL; /* for -g. */
+char *spec_defines_file = NULL; /* for --defines. */
+char *parser_file_name = NULL;
+
+char *infile = NULL;
+char *attrsfile = NULL;
+
+static char *base_name = NULL;
+char *short_base_name = NULL;
+
+/* C source file extension (the parser source). */
+const char *src_extension = NULL;
+/* Header file extension (if option ``-d'' is specified). */
+const char *header_extension = NULL;
+
+/* Should we insert '.tab' in yacc-compatible parsers? */
+int tab_extension = 0;
\f
+
/*--------------------------.
| Is SUFFIX ending STRING? |
`--------------------------*/
-static int
+int
strsuffix (const char *string, const char *suffix)
{
size_t string_len = strlen (string);
| STRING1, and STRING2. |
`-----------------------------------------------------------------*/
-static char *
+char*
stringappend (const char *string1, const char *string2)
{
size_t len = strlen (string1) + strlen (string2);
return res;
}
+
+/*-----------------------------------------------------------------.
+| Computes the macro name used to avoid double inclusion in the |
+| header of the parser and store it in header_macro_name. Be sure |
+| to produce valid CPP names (don't start with digit, remain |
+| alphanumerical + underscore). |
+`-----------------------------------------------------------------*/
+
+char *
+compute_header_macro (void)
+{
+ const char *prefix = "BISON_";
+ char *macro_name, *cp;
+
+ if (spec_defines_file)
+ {
+ macro_name = XMALLOC (char,
+ strlen (prefix) +
+ strlen (spec_defines_file) + 1);
+ cp = stpcpy (macro_name, prefix);
+ cp = stpcpy (cp, spec_defines_file);
+ }
+ else
+ {
+ macro_name = XMALLOC (char,
+ strlen (prefix) +
+ strlen (base_name) +
+ strlen (header_extension) + 1);
+ cp = stpcpy (macro_name, prefix);
+ cp = stpcpy (cp, base_name);
+ cp = stpcpy (cp, header_extension);
+ }
+
+ for (cp = macro_name; *cp; ++cp)
+ if (islower (*cp))
+ *cp = toupper (*cp);
+ else if (!isalnum (*cp))
+ *cp = '_';
+
+ return macro_name;
+}
+
+
/*-----------------------------------------------------------------.
| Try to open file NAME with mode MODE, and print an error message |
| if fails. |
return result;
}
-/*--------------------------------------------------.
-| Save the content of the obstack OBS in FILENAME. |
-`--------------------------------------------------*/
-
-static void
-obstack_save (struct obstack *obs, const char *filename)
-{
- FILE *out = xfopen (filename, "w");
- size_t size = obstack_object_size (obs);
- fwrite (obstack_finish (obs), 1, size, out);
- xfclose (out);
-}
-
/*------------------------------------------------------------------.
| Return the path to the skeleton which locaction might be given in |
-| ENVVAR, otherwise return SKELETON. |
+| ENVVAR, otherwise return SKELETON_NAME. |
`------------------------------------------------------------------*/
const char *
-skeleton_find (const char *envvar, const char *skeleton)
+skeleton_find (const char *envvar, const char *skeleton_name)
{
const char *res = getenv (envvar);
-#ifdef MSDOS
- const char *cp;
-
- /* File doesn't exist in current directory; try in INIT directory. */
- if (!res && (cp = getenv ("INIT")))
+#if defined (MSDOS) || defined (_WIN32)
+ if (!res)
{
- res = XMALLOC (char, strlen (cp) + strlen (skeleton) + 2);
- sprintf (res, "%s%c%s", cp, '/', skeleton);
+ /* Skeleton file name without path */
+ const char *skel_name = strrchr (skeleton_name, '/');
+ if (!skel_name)
+ skel_name = strrchr (skeleton_name, '\\');
+ if (!skel_name)
+ skel_name = skeleton_name;
+ else
+ ++skel_name;
+
+ /* File doesn't exist in current directory; try in INIT directory. */
+ const char *cp = getenv ("INIT");
+ if (cp)
+ {
+ res = XMALLOC (char, strlen (cp) + strlen (skel_name) + 2);
+ sprintf (res, "%s%c%s", cp, '\\', skel_name);
+ }
+ else if (access (skel_name, 4) == 0) /* Look in current dir. */
+ res = skel_name;
+ else
+ {
+ /* Look in program locations dir. */
+ extern char *program_name;
+ cp = strrchr(program_name, '\\');
+ if (!cp)
+ return skeleton_name;
+ else
+ ++cp;
+ res = XMALLOC (char, cp - program_name + strlen (skel_name) + 1);
+ strncpy (res, program_name, cp - program_name);
+ strcpy (res + (cp - program_name), skel_name);
+ }
}
-#endif /* !MSDOS */
-
+#endif /* defined (MSDOS) || defined (_WIN32) */
if (!res)
- res = skeleton;
+ res = skeleton_name;
return res;
}
-
\f
-/*----------------------------------------.
-| Compute BASE_NAME and SHORT_BASE_NAME. |
-`----------------------------------------*/
+
+/*----------------------------------------------------------------.
+| Compute BASE_NAME, SHORT_BASE_NAME and output files extensions. |
+`----------------------------------------------------------------*/
+
+/* Replace all characters FROM by TO in the string IN.
+ and returns a new allocated string. */
+static char *
+tr (const char *in, char from, char to)
+{
+ char *temp;
+ char *out;
+
+ out = XMALLOC (char, strlen (in) + 1);
+
+ for (temp = out; *in; in++, out++)
+ if (*in == from)
+ *out = to;
+ else
+ *out = *in;
+ *out = 0;
+ return (temp);
+}
+
+/* Gets the extension index in FILENAME. Returns 0 if fails to
+ find an extension. */
+static int
+get_extension_index (const char *filename)
+{
+ int len;
+
+ len = strlen (filename);
+
+ if (filename[len-- - 1] == '.')
+ return (0);
+
+ while ((len > 0) && (filename[len - 1] != '.'))
+ if (filename[len - 1] == '/')
+ return (0);
+ else
+ len--;
+
+ return (len - 1);
+}
+
+/* Computes extensions from the grammar file extension. */
+static void
+compute_exts_from_gf (const char *ext)
+{
+ src_extension = tr (ext, 'y', 'c');
+ src_extension = tr (src_extension, 'Y', 'C');
+ header_extension = tr (ext, 'y', 'h');
+ header_extension = tr (header_extension, 'Y', 'H');
+}
+
+/* Computes extensions from the given c source file extension. */
+static void
+compute_exts_from_src (const char *ext)
+{
+ /* We use this function when the user specifies `-o' or `--output',
+ so the extenions must be computed unconditionally from the file name
+ given by this option. */
+ src_extension = xstrdup (ext);
+ header_extension = tr (ext, 'c', 'h');
+ header_extension = tr (header_extension, 'C', 'H');
+}
/* FIXME: Should use xstrndup. */
{
size_t base_length;
size_t short_base_length;
+ size_t ext_index;
/* If --output=foo.c was specified (SPEC_OUTFILE == foo.c),
BASE_NAME and SHORT_BASE_NAME are `foo'.
#endif /* MSDOS */
/* BASE_LENGTH includes ".tab" but not ".c". */
base_length = strlen (spec_outfile);
- if (strsuffix (spec_outfile, ".c"))
- base_length -= 2;
+
+ ext_index = get_extension_index (spec_outfile);
+ /* If the initial segment of extension contains 'c' or a 'C', I assume
+ that it is a C or C++ source file. */
+ if (ext_index)
+ ext_index =
+ (strspn (spec_outfile + ext_index + 1, "cC")) ? ext_index : 0;
+ if (ext_index)
+ {
+ base_length -= strlen (spec_outfile + ext_index);
+ compute_exts_from_src (spec_outfile + ext_index);
+ }
+
+ base_name = strndup (spec_outfile, base_length);
/* SHORT_BASE_LENGTH includes neither ".tab" nor ".c". */
short_base_length = base_length;
- if (strsuffix (spec_outfile, ".tab") || strsuffix (spec_outfile, "_tab"))
+ if (strsuffix (base_name, ".tab") || strsuffix (base_name, "_tab"))
short_base_length -= 4;
- base_name = strndup (spec_outfile, base_length);
short_base_name = strndup (spec_outfile, short_base_length);
+ /* FIXME: This is a quick and dirty way for me to find out if we
+ should .tab or not, using the computations above. */
+ if (strcmp (base_name, short_base_name))
+ tab_extension = 1;
+
return;
}
strlwr (spec_file_prefix);
#endif /* MSDOS */
short_base_name = xstrdup (spec_file_prefix);
-
base_name = XMALLOC (char,
strlen (short_base_name) + strlen (EXT_TAB) + 1);
stpcpy (stpcpy (base_name, short_base_name), EXT_TAB);
+ /* Computes the extensions from the garmmar file name. */
+ ext_index = get_extension_index (infile);
+ /* If the initial segment of extension contains a 'y' or a 'Y', I assume
+ that it is a yacc or bison grammar file. */
+ if (ext_index)
+ ext_index = (strspn (infile + ext_index + 1, "yY")) ? ext_index : 0;
+ if (ext_index)
+ compute_exts_from_gf (infile + ext_index);
+
+ /* It seems that when only a prefix is given, '.tab' should always be
+ used. */
+ tab_extension = 1;
+
return;
}
/* BASE_LENGTH gets length of BASE_NAME, sans ".y" suffix if any. */
base_length = strlen (name_base);
- if (strsuffix (name_base, ".y"))
- base_length -= 2;
+
+ ext_index = get_extension_index (name_base);
+ /* If the initial segment of extension contains a 'y' or a 'Y', I assume
+ that it is a yacc or bison grammar file. */
+ if (ext_index)
+ ext_index = (strspn (name_base + ext_index + 1, "yY")) ? ext_index : 0;
+ if (ext_index)
+ {
+ base_length -= strlen (name_base + ext_index);
+ compute_exts_from_gf (name_base + ext_index);
+ }
+
short_base_length = base_length;
short_base_name = strndup (name_base, short_base_length);
strlen (short_base_name) + strlen (EXT_TAB) + 1);
stpcpy (stpcpy (base_name, short_base_name), EXT_TAB);
+ /* By default, Bison should insert '.tab' were needed. */
+ tab_extension = 1;
+
return;
}
}
-/*-----------------------------------------------------------------.
-| Open the input file. Look for the skeletons. Find the names of |
-| the output files. Prepare the obstacks. |
-`-----------------------------------------------------------------*/
+/*-------------------------------------------------------.
+| Close the open files, compute the output files names. |
+`-------------------------------------------------------*/
void
-open_files (void)
+compute_output_file_names (void)
{
compute_base_names ();
- finput = xfopen (infile, "r");
+ parser_file_name =
+ spec_outfile ? spec_outfile : stringappend (base_name, src_extension);
- if (verbose_flag)
- /* We used to use just .out if spec_name_prefix (-p) was used, but
- that conflicts with Posix. */
- foutput = xfopen (stringappend (base_name, EXT_OUTPUT), "w");
-
- attrsfile = stringappend (short_base_name, EXT_STYPE_H);
-
- /* Initialize the obstacks. */
- obstack_init (&action_obstack);
- obstack_init (&attrs_obstack);
- obstack_init (&table_obstack);
- obstack_init (&defines_obstack);
- obstack_init (&guard_obstack);
-}
+ /* If not yet done. */
+ if (!src_extension)
+ src_extension = ".c";
+ if (!header_extension)
+ header_extension = ".h";
+ /* It the defines filename if not given, we create it. */
+ if (!spec_defines_file)
+ spec_defines_file = stringappend (base_name, header_extension);
+ /* It the graph filename if not given, we create it. */
+ if (!spec_graph_file)
+ spec_graph_file = stringappend (short_base_name, ".vcg");
-/*-----------------------------------------------------.
-| Close the open files, produce all the output files. |
-`-----------------------------------------------------*/
+ spec_verbose_file = stringappend (short_base_name, EXT_OUTPUT);
-void
-output_files (void)
-{
- xfclose (finput);
- xfclose (foutput);
-
- /* Output the main file. */
- if (spec_outfile)
- obstack_save (&table_obstack, spec_outfile);
- else
- obstack_save (&table_obstack, stringappend (base_name, ".c"));
-
- /* Output the header file if wanted. */
- if (defines_flag)
- obstack_save (&defines_obstack, stringappend (base_name, ".h"));
-
- /* If we output only the table, dump the actions in ACTFILE. */
- if (no_parser_flag)
- obstack_save (&action_obstack, stringappend (short_base_name, ".act"));
-
- /* If we produced a semantic parser ATTRS_OBSTACK must be dumped
- into its own file, ATTTRSFILE. */
- if (semantic_parser)
- {
- obstack_save (&attrs_obstack, attrsfile);
- obstack_save (&guard_obstack,
- stringappend (short_base_name, EXT_GUARD_C));
- }
+ attrsfile = stringappend (short_base_name, EXT_STYPE_H);
+#ifndef MSDOS
+ attrsfile = stringappend (attrsfile, header_extension);
+#endif /* MSDOS */
}
projects / bison.git / blobdiff