X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/55b9634155b80271df2b90a95d5f529e2371be28..975553805cf2a8e906fee420c0e0bf4945935d63:/src/files.c diff --git a/src/files.c b/src/files.c index ccb47182..c4c223d3 100644 --- a/src/files.c +++ b/src/files.c @@ -1,5 +1,6 @@ /* Open and close files for bison, - Copyright 1984, 1986, 1989, 1992, 2000 Free Software Foundation, Inc. + Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002 + Free Software Foundation, Inc. This file is part of Bison, the GNU Compiler Compiler. @@ -22,61 +23,79 @@ #include "system.h" #include "getargs.h" #include "files.h" -#include "xalloc.h" #include "gram.h" +#include "error.h" #include "complain.h" +/* From basename.c. Almost a lie, as it returns a char *. */ +const char *base_name PARAMS ((char const *name)); + FILE *finput = NULL; -FILE *foutput = NULL; -FILE *fguard = NULL; -FILE *fparser = 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; - -static char *outfile; -static char *defsfile; -static char *tabfile; -static char *guardfile; -static char *actfile; + +struct obstack pre_prologue_obstack; +struct obstack post_prologue_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; + +static char *full_base_name = NULL; + +/* Prefix used to generate output file names. */ +char *short_base_name = NULL; + +/* Infix used to generate output file names (i.e., `.tab', or `_tab', + or `'). */ +char *output_infix = 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; + +/*--------------------------. +| Is SUFFIX ending STRING? | +`--------------------------*/ + +int +strsuffix (const char *string, const char *suffix) +{ + size_t string_len = strlen (string); + size_t suffix_len = strlen (suffix); + if (suffix_len <= string_len) + return !strcmp (string + string_len - suffix_len, suffix); + else + return 0; +} + + /*-----------------------------------------------------------------. | Return a newly allocated string composed of the concatenation of | -| the END1 first chars of STRING1, and STRING2. | +| STRING1, and STRING2. | `-----------------------------------------------------------------*/ -static char * -stringappend (const char *string1, int end1, const char *string2) +char* +stringappend (const char *string1, const char *string2) { - char *res; + size_t len = strlen (string1) + strlen (string2); + char *res = XMALLOC (char, len + 1); char *cp; - const char *cp1; - int i; - - cp1 = string2; - i = 0; - while (*cp1++) - i++; - - res = XCALLOC (char, i + end1 + 1); - - cp = res; - cp1 = string1; - for (i = 0; i < end1; i++) - *cp++ = *cp1++; - - cp1 = string2; - while ((*cp++ = *cp1++)) - ; - + cp = stpcpy (res, string1); + cp = stpcpy (cp, string2); return res; } @@ -85,7 +104,7 @@ stringappend (const char *string1, int end1, const char *string2) | if fails. | `-----------------------------------------------------------------*/ -static FILE * +FILE * xfopen (const char *name, const char *mode) { FILE *ptr; @@ -101,7 +120,7 @@ xfopen (const char *name, const char *mode) | Try to close file PTR, and print an error message if fails. | `-------------------------------------------------------------*/ -static int +int xfclose (FILE *ptr) { int result; @@ -115,194 +134,207 @@ xfclose (FILE *ptr) return result; } + -/*--------------------------------------------------. -| Save the content of the obstack OBS in FILENAME. | -`--------------------------------------------------*/ +/*----------------------------------------------------------------. +| Compute BASE_NAME, SHORT_BASE_NAME and output files extensions. | +`----------------------------------------------------------------*/ -static void -obstack_save (struct obstack *obs, const char *filename) +/* 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) { - FILE *out = xfopen (filename, "w"); - size_t size = obstack_object_size (obs); - fwrite (obstack_finish (obs), 1, size, out); - xfclose (out); + 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); } +/* 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'); +} -static const char * -skeleton_find (const char *envvar, const char *skeleton) +/* Computes extensions from the given c source file extension. */ +static void +compute_exts_from_src (const char *ext) { - const char *res = getenv (envvar); + /* 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'); +} -#ifdef MSDOS - const char *cp; - /* File doesn't exist in current directory; try in INIT directory. */ - if (!res && (cp = getenv ("INIT"))) - { - res = XMALLOC (char, strlen (cp) + strlen (skeleton) + 2); - sprintf (res, "%s%c%s", cp, '/', skeleton); - } -#endif /* !MSDOS */ +/* Decompose FILENAME in four parts: *BASE, *TAB, and *EXT, the fourth + part, (the directory) is ranging from FILENAME to the char before + *BASE, so we don't need an additional parameter. - if (!res) - res = skeleton; + *EXT points to the last period in the basename, or NULL if none. - return res; -} + If there is no *EXT, *TAB is NULL. Otherwise, *TAB points to + `.tab' or `_tab' if present right before *EXT, or is NULL. *TAB + cannot be equal to *BASE. - -/*-----------------------------------------------------------------. -| Open the input file. Look for the skeletons. Find the names of | -| the output files. Prepare the obstacks. | -`-----------------------------------------------------------------*/ + None are allocated, they are simply pointers to parts of FILENAME. + Examples: -void -open_files (void) -{ - char *name_base; - int base_length; - int short_base_length; + '/tmp/foo.tab.c' -> *BASE = 'foo.tab.c', *TAB = '.tab.c', *EXT = + '.c' - if (spec_outfile) - { - /* -o was specified. The precise -o name will be used for FTABLE. - For other output files, remove the ".c" or ".tab.c" suffix. */ - name_base = spec_outfile; -#ifdef MSDOS - strlwr (name_base); -#endif /* MSDOS */ - /* BASE_LENGTH includes ".tab" but not ".c". */ - base_length = strlen (name_base); - if (!strcmp (name_base + base_length - 2, ".c")) - base_length -= 2; - /* SHORT_BASE_LENGTH includes neither ".tab" nor ".c". */ - short_base_length = base_length; - if (!strncmp (name_base + short_base_length - 4, ".tab", 4)) - short_base_length -= 4; - else if (!strncmp (name_base + short_base_length - 4, "_tab", 4)) - short_base_length -= 4; - } - else if (spec_file_prefix) - { - /* -b was specified. Construct names from it. */ - /* SHORT_BASE_LENGTH includes neither ".tab" nor ".c". */ - short_base_length = strlen (spec_file_prefix); - /* Count room for `.tab'. */ - base_length = short_base_length + 4; - name_base = XMALLOC (char, base_length + 1); - /* Append `.tab'. */ - strcpy (name_base, spec_file_prefix); - strcat (name_base, EXT_TAB); -#ifdef MSDOS - strlwr (name_base); -#endif /* MSDOS */ - } - else - { - /* -o was not specified; compute output file name from input - or use y.tab.c, etc., if -y was specified. */ + 'foo.c' -> *BASE = 'foo.c', *TAB = NULL, *EXT = '.c' - static char FIXED_NAME_BASE[] = "y.y"; + 'tab.c' -> *BASE = 'tab.c', *TAB = NULL, *EXT = '.c' - name_base = yacc_flag ? FIXED_NAME_BASE : infile; + '.tab.c' -> *BASE = '.tab.c', *TAB = NULL, *EXT = '.c' - /* BASE_LENGTH gets length of NAME_BASE, sans ".y" suffix if any. */ + 'foo.tab' -> *BASE = 'foo.tab', *TAB = NULL, *EXT = '.tab' - base_length = strlen (name_base); - if (!strcmp (name_base + base_length - 2, ".y")) - base_length -= 2; - short_base_length = base_length; + 'foo_tab' -> *BASE = 'foo_tab', *TAB = NULL, *EXT = NULL - name_base = stringappend (name_base, short_base_length, EXT_TAB); - base_length = short_base_length + 4; - } + 'foo' -> *BASE = 'foo', *TAB = NULL, *EXT = NULL. */ - finput = xfopen (infile, "r"); +static void +filename_split (const char *filename, + const char **base, const char **tab, const char **ext) +{ + *base = base_name (filename); + + /* Look for the extension, i.e., look for the last dot. */ + *ext = strrchr (*base, '.'); + *tab = NULL; + + /* If there is an exentension, check if there is a `.tab' part right + before. */ + if (*ext + && (*ext - *base) > (int) strlen (".tab") + && (!strncmp (*ext - strlen (".tab"), ".tab", strlen (".tab")) + || !strncmp (*ext - strlen ("_tab"), "_tab", strlen ("_tab")))) + *tab = *ext - strlen (".tab"); +} - if (!no_parser_flag) - fparser = xfopen (skeleton_find ("BISON_SIMPLE", BISON_SIMPLE), "r"); - if (verbose_flag) - { - /* We used to use just .out if spec_name_prefix (-p) was used, - but that conflicts with Posix. */ - outfile = stringappend (name_base, short_base_length, EXT_OUTPUT); - foutput = xfopen (outfile, "w"); - } +/* FIXME: Should use xstrndup. */ - if (no_parser_flag) - { - /* use permanent name for actions file */ - actfile = stringappend (name_base, short_base_length, ".act"); - } +static void +compute_base_names (void) +{ + const char *base, *tab, *ext; - if (defines_flag) - { - defsfile = stringappend (name_base, base_length, ".h"); - } + /* If --output=foo.c was specified (SPEC_OUTFILE == foo.c), + BASE_NAME and SHORT_BASE_NAME are `foo'. - /* These are opened by `done' or `open_extra_files', if at all */ + If --output=foo.tab.c was specified, BASE_NAME is `foo.tab' and + SHORT_BASE_NAME is `foo'. + + The precise -o name will be used for FTABLE. For other output + files, remove the ".c" or ".tab.c" suffix. */ if (spec_outfile) - tabfile = spec_outfile; - else - tabfile = stringappend (name_base, base_length, ".c"); + { + filename_split (spec_outfile, &base, &tab, &ext); - attrsfile = stringappend (name_base, short_base_length, EXT_STYPE_H); - guardfile = stringappend (name_base, short_base_length, EXT_GUARD_C); + /* The full base name goes up the EXT, excluding it. */ + full_base_name = + xstrndup (spec_outfile, + (strlen (spec_outfile) - (ext ? strlen (ext) : 0))); - /* Initialize the obstacks. */ - obstack_init (&action_obstack); - obstack_init (&attrs_obstack); - obstack_init (&table_obstack); - obstack_init (&defines_obstack); -} + /* The short base name goes up to TAB, excluding it. */ + short_base_name = + xstrndup (spec_outfile, + (strlen (spec_outfile) + - (tab ? strlen (tab) : (ext ? strlen (ext) : 0)))); + + if (tab) + output_infix = xstrndup (tab, + (strlen (tab) - (ext ? strlen (ext) : 0))); + + if (ext) + compute_exts_from_src (ext); + } + /* If --file-prefix=foo was specified, FULL_BASE_NAME = `foo.tab' + and SHORT_BASE_NAME = `foo'. + Construct names from it. */ + else + { + if (spec_file_prefix) + { + /* If --file-prefix=foo was specified, SHORT_BASE_NAME = + `foo'. */ + short_base_name = xstrdup (spec_file_prefix); + } + else if (yacc_flag) + { + /* If --yacc, then the output is `y.tab.c'. */ + short_base_name = xstrdup ("y"); + } + else + { + /* Otherwise, the short base name is computed from the input + grammar: `foo/bar.yy' => `bar'. */ + filename_split (infile, &base, &tab, &ext); + short_base_name = + xstrndup (base, + (strlen (base) - (ext ? strlen (ext) : 0))); + } + + /* In these cases, always append `.tab'. */ + output_infix = xstrdup (EXT_TAB); + + full_base_name = XMALLOC (char, + strlen (short_base_name) + + strlen (EXT_TAB) + 1); + stpcpy (stpcpy (full_base_name, short_base_name), EXT_TAB); + + /* Computes the extensions from the grammar file name. */ + filename_split (infile, &base, &tab, &ext); + if (ext && !yacc_flag) + compute_exts_from_gf (ext); + } +} -/*--------------------------------------------------------------------. -| Open the output files needed only for the semantic parser. This | -| is done when %semantic_parser is seen in the declarations section. | -`--------------------------------------------------------------------*/ +/*-------------------------------------------------------. +| Close the open files, compute the output files names. | +`-------------------------------------------------------*/ void -open_extra_files (void) +compute_output_file_names (void) { - xfclose (fparser); + compute_base_names (); - if (!no_parser_flag) - fparser = xfopen (skeleton_find ("BISON_HAIRY", BISON_HAIRY), "r"); - fguard = xfopen (guardfile, "w"); -} + /* If not yet done. */ + if (!src_extension) + src_extension = ".c"; + if (!header_extension) + header_extension = ".h"; + parser_file_name = + spec_outfile ? spec_outfile : stringappend (full_base_name, src_extension); -/*-----------------------------------------------------. -| Close the open files, produce all the output files. | -`-----------------------------------------------------*/ + /* It the defines filename if not given, we create it. */ + if (!spec_defines_file) + spec_defines_file = stringappend (full_base_name, header_extension); -void -output_files (void) -{ - xfclose (fguard); - xfclose (finput); - xfclose (fparser); - 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); + /* It the graph filename if not given, we create it. */ + if (!spec_graph_file) + spec_graph_file = stringappend (short_base_name, ".vcg"); + + spec_verbose_file = stringappend (short_base_name, EXT_OUTPUT); }