X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/19c50364f38b72dcd7bf67a998db3c815b7b6a94..e9f87b5b7df2e328d2e4196d276c0d96594c906b:/src/files.c diff --git a/src/files.c b/src/files.c index 32a4a8d5..2e817b1e 100644 --- a/src/files.c +++ b/src/files.c @@ -1,5 +1,5 @@ /* 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. @@ -22,36 +22,51 @@ #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; -FILE *fguard = NULL; struct obstack action_obstack; struct obstack attrs_obstack; -struct obstack table_obstack; -struct obstack defines_obstack; - -/* File name specified with -o for the output file, or 0 if no -o. */ -char *spec_outfile; - -char *infile; -char *attrsfile; -char *guardfile; - -static char *outfile; -static char *defsfile; -static char *tabfile; -static char *actfile; +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; + /*--------------------------. | Is SUFFIX ending STRING? | `--------------------------*/ -static int +int strsuffix (const char *string, const char *suffix) { size_t string_len = strlen (string); @@ -68,7 +83,7 @@ strsuffix (const char *string, const char *suffix) | STRING1, and STRING2. | `-----------------------------------------------------------------*/ -static char * +char* stringappend (const char *string1, const char *string2) { size_t len = strlen (string1) + strlen (string2); @@ -79,6 +94,49 @@ stringappend (const char *string1, const char *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. | @@ -115,59 +173,134 @@ xfclose (FILE *ptr) 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; } - -/*----------------------------------------. -| 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. */ static void -base_names (char **base_name, char **short_base_name) +compute_base_names (void) { 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'. @@ -184,14 +317,30 @@ base_names (char **base_name, char **short_base_name) #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); + 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; } @@ -205,11 +354,23 @@ base_names (char **base_name, char **short_base_name) #ifdef MSDOS 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); + 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; } @@ -225,96 +386,62 @@ base_names (char **base_name, char **short_base_name) /* 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); + short_base_name = strndup (name_base, short_base_length); + + base_name = XMALLOC (char, + strlen (short_base_name) + strlen (EXT_TAB) + 1); + stpcpy (stpcpy (base_name, short_base_name), EXT_TAB); - *base_name = XMALLOC (char, - 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) { - char *base_name; - char *short_base_name; - - base_names (&base_name, &short_base_name); + 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. */ - outfile = stringappend (base_name, EXT_OUTPUT); - foutput = xfopen (outfile, "w"); - } + /* If not yet done. */ + if (!src_extension) + src_extension = ".c"; + if (!header_extension) + header_extension = ".h"; - if (no_parser_flag) - { - /* use permanent name for actions file */ - actfile = stringappend (short_base_name, ".act"); - } + /* It the defines filename if not given, we create it. */ + if (!spec_defines_file) + spec_defines_file = stringappend (base_name, header_extension); - if (defines_flag) - { - defsfile = stringappend (base_name, ".h"); - } + /* It the graph filename if not given, we create it. */ + if (!spec_graph_file) + spec_graph_file = stringappend (short_base_name, ".vcg"); - /* These are opened by `done' or `open_extra_files', if at all */ - if (spec_outfile) - tabfile = spec_outfile; - else - tabfile = stringappend (base_name, ".c"); + spec_verbose_file = stringappend (short_base_name, EXT_OUTPUT); attrsfile = stringappend (short_base_name, EXT_STYPE_H); - guardfile = stringappend (short_base_name, EXT_GUARD_C); - - /* Initialize the obstacks. */ - obstack_init (&action_obstack); - obstack_init (&attrs_obstack); - obstack_init (&table_obstack); - obstack_init (&defines_obstack); -} - - - -/*-----------------------------------------------------. -| Close the open files, produce all the output files. | -`-----------------------------------------------------*/ - -void -output_files (void) -{ - xfclose (fguard); - xfclose (finput); - xfclose (foutput); - - /* Output the main file. */ - obstack_save (&table_obstack, tabfile); - - /* Output the header file if wanted. */ - if (defines_flag) - obstack_save (&defines_obstack, defsfile); - - /* If we output only the table, dump the actions in ACTFILE. - */ - if (no_parser_flag) - obstack_save (&action_obstack, actfile); - - /* If we produced a semantic parser ATTRS_OBSTACK must be dumped - into its own file, ATTTRSFILE. */ - if (semantic_parser) - obstack_save (&attrs_obstack, attrsfile); +#ifndef MSDOS + attrsfile = stringappend (attrsfile, header_extension); +#endif /* MSDOS */ }