X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/27110317b8a2d2a4008e41be26e2f0c76416cbc8..637fa3f83edca74df6a9d834ffe7bfd4d7468793:/src/files.c diff --git a/src/files.c b/src/files.c index 235deb03..6c222a87 100644 --- a/src/files.c +++ b/src/files.c @@ -1,5 +1,7 @@ -/* Open and close files for bison, - Copyright 1984, 1986, 1989, 1992, 2000 Free Software Foundation, Inc. +/* Open and close files for Bison. + + Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002, 2003 + Free Software Foundation, Inc. This file is part of Bison, the GNU Compiler Compiler. @@ -20,61 +22,65 @@ #include "system.h" -#include "getargs.h" + +#include +#include +#include + +#include "complain.h" #include "files.h" -#include "xalloc.h" +#include "getargs.h" #include "gram.h" -#include "complain.h" -FILE *finput = NULL; -FILE *foutput = NULL; -FILE *fguard = NULL; +/* From basename.c. Almost a lie, as it returns a char *. */ +const char *base_name (char const *name); -struct obstack action_obstack; -struct obstack attrs_obstack; -struct obstack table_obstack; -struct obstack defines_obstack; +FILE *finput = NULL; -/* File name specified with -o for the output file, or 0 if no -o. */ -char *spec_outfile; +struct obstack pre_prologue_obstack; +struct obstack post_prologue_obstack; -char *infile; -char *attrsfile; -char *guardfile; +/* 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. */ -static char *base_name; -static char *short_base_name; +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; - -/*--------------------------. -| Is SUFFIX ending STRING? | -`--------------------------*/ +uniqstr grammar_file = NULL; +uniqstr current_file = NULL; -static 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; -} +static char *full_base_name = NULL; +/* Prefix used to generate output file names. */ +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; + /*-----------------------------------------------------------------. | Return a newly allocated string composed of the concatenation of | -| STRING1, and STRING2. | +| STR1, and STR2. | `-----------------------------------------------------------------*/ static char * -stringappend (const char *string1, const char *string2) +concat2 (char const *str1, char const *str2) { - size_t len = strlen (string1) + strlen (string2); - char *res = XMALLOC (char, len + 1); + size_t len = strlen (str1) + strlen (str2); + char *res = xmalloc (len + 1); char *cp; - cp = stpcpy (res, string1); - cp = stpcpy (cp, string2); + cp = stpcpy (res, str1); + cp = stpcpy (cp, str2); return res; } @@ -90,7 +96,7 @@ xfopen (const char *name, const char *mode) ptr = fopen (name, mode); if (!ptr) - error (2, errno, _("cannot open file `%s'"), name); + error (EXIT_FAILURE, get_errno (), _("cannot open file `%s'"), name); return ptr; } @@ -99,200 +105,233 @@ xfopen (const char *name, const char *mode) | Try to close file PTR, and print an error message if fails. | `-------------------------------------------------------------*/ -int +void xfclose (FILE *ptr) { - int result; - if (ptr == NULL) - return 0; + return; - result = fclose (ptr); - if (result == EOF) - error (2, errno, _("cannot close file")); + if (ferror (ptr)) + error (EXIT_FAILURE, 0, _("I/O error")); - return result; + if (fclose (ptr) != 0) + error (EXIT_FAILURE, get_errno (), _("cannot close file")); } + -/*--------------------------------------------------. -| Save the content of the obstack OBS in FILENAME. | -`--------------------------------------------------*/ +/*---------------------------------------------------------------------. +| Compute FULL_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 = xmalloc (strlen (in) + 1); + + for (temp = out; *in; in++, out++) + if (*in == from) + *out = to; + else + *out = *in; + *out = 0; + return (temp); +} + +/* Compute 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'); +} + +/* Compute extensions from the given c source file extension. */ static void -obstack_save (struct obstack *obs, const char *filename) +compute_exts_from_src (const char *ext) { - FILE *out = xfopen (filename, "w"); - size_t size = obstack_object_size (obs); - fwrite (obstack_finish (obs), 1, size, out); - xfclose (out); + /* 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'); } -/*------------------------------------------------------------------. -| Return the path to the skeleton which locaction might be given in | -| ENVVAR, otherwise return SKELETON. | -`------------------------------------------------------------------*/ +/* 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. + + *EXT points to the last period in the basename, or NULL if none. + + 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. + + None are allocated, they are simply pointers to parts of FILENAME. + Examples: + + '/tmp/foo.tab.c' -> *BASE = 'foo.tab.c', *TAB = '.tab.c', *EXT = + '.c' -const char * -skeleton_find (const char *envvar, const char *skeleton) + 'foo.c' -> *BASE = 'foo.c', *TAB = NULL, *EXT = '.c' + + 'tab.c' -> *BASE = 'tab.c', *TAB = NULL, *EXT = '.c' + + '.tab.c' -> *BASE = '.tab.c', *TAB = NULL, *EXT = '.c' + + 'foo.tab' -> *BASE = 'foo.tab', *TAB = NULL, *EXT = '.tab' + + 'foo_tab' -> *BASE = 'foo_tab', *TAB = NULL, *EXT = NULL + + 'foo' -> *BASE = 'foo', *TAB = NULL, *EXT = NULL. */ + +static void +filename_split (const char *filename, + const char **base, const char **tab, const char **ext) { - const char *res = getenv (envvar); + *base = base_name (filename); -#ifdef MSDOS - const char *cp; + /* Look for the extension, i.e., look for the last dot. */ + *ext = strrchr (*base, '.'); + *tab = NULL; - /* File doesn't exist in current directory; try in INIT directory. */ - if (!res && (cp = getenv ("INIT"))) + /* If there is an extension, check if there is a `.tab' part right + before. */ + if (*ext) { - res = XMALLOC (char, strlen (cp) + strlen (skeleton) + 2); - sprintf (res, "%s%c%s", cp, '/', skeleton); + size_t baselen = *ext - *base; + size_t dottablen = 4; + if (dottablen < baselen + && (strncmp (*ext - dottablen, ".tab", dottablen) == 0 + || strncmp (*ext - dottablen, "_tab", dottablen) == 0)) + *tab = *ext - dottablen; } -#endif /* !MSDOS */ - - if (!res) - res = skeleton; - - return res; } - -/*----------------------------------------. -| Compute BASE_NAME and SHORT_BASE_NAME. | -`----------------------------------------*/ /* FIXME: Should use xstrndup. */ static void compute_base_names (void) { - size_t base_length; - size_t short_base_length; + const char *base, *tab, *ext; /* If --output=foo.c was specified (SPEC_OUTFILE == foo.c), - BASE_NAME and SHORT_BASE_NAME are `foo'. + FULL_BASE_NAME and SHORT_BASE_NAME are `foo'. - If --output=foo.tab.c was specified, BASE_NAME is `foo.tab' and - SHORT_BASE_NAME is `foo'. + If --output=foo.tab.c was specified, FULL_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) { -#ifdef MSDOS - strlwr (spec_outfile); -#endif /* MSDOS */ - /* BASE_LENGTH includes ".tab" but not ".c". */ - base_length = strlen (spec_outfile); - if (strsuffix (spec_outfile, ".c")) - base_length -= 2; - /* SHORT_BASE_LENGTH includes neither ".tab" nor ".c". */ - short_base_length = base_length; - if (strsuffix (spec_outfile, ".tab") || strsuffix (spec_outfile, "_tab")) - short_base_length -= 4; - base_name = strndup (spec_outfile, base_length); - short_base_name = strndup (spec_outfile, short_base_length); - - return; - } + filename_split (spec_outfile, &base, &tab, &ext); - /* If --file-prefix=foo was specified, BASE_NAME and SHORT_BASE_NAME - are `foo'. - - Construct names from it. */ - if (spec_file_prefix) - { -#ifdef MSDOS - strlwr (spec_file_prefix); -#endif /* MSDOS */ - short_base_name = xstrdup (spec_file_prefix); + /* The full base name goes up the EXT, excluding it. */ + full_base_name = + xstrndup (spec_outfile, + (strlen (spec_outfile) - (ext ? strlen (ext) : 0))); - base_name = XMALLOC (char, - strlen (short_base_name) + strlen (EXT_TAB) + 1); - stpcpy (stpcpy (base_name, short_base_name), EXT_TAB); + /* 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)))); - return; + if (ext) + compute_exts_from_src (ext); } - /* If neither -o nor --file-prefix were specified, and the input - file is foo.y, BASE_NAME is `foo.tab', and SHORT_BASE_NAME is - `foo'. - - If --yacc is used, do as if the input file was `y.y'. */ - { - const char *name_base = yacc_flag ? "y.y" : infile; - - /* 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; - short_base_length = 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); + /* If --file-prefix=foo was specified, FULL_BASE_NAME = `foo.tab' + and SHORT_BASE_NAME = `foo'. - return; - } + 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 (grammar_file, &base, &tab, &ext); + short_base_name = + xstrndup (base, + (strlen (base) - (ext ? strlen (ext) : 0))); + } + + full_base_name = xmalloc (strlen (short_base_name) + + strlen (TAB_EXT) + 1); + stpcpy (stpcpy (full_base_name, short_base_name), TAB_EXT); + + /* Compute the extensions from the grammar file name. */ + filename_split (grammar_file, &base, &tab, &ext); + if (ext && !yacc_flag) + compute_exts_from_gf (ext); + } } -/*-----------------------------------------------------------------. -| Open the input file. Look for the skeletons. Find the names of | -| the output files. Prepare the obstacks. | -`-----------------------------------------------------------------*/ + +/* Compute the output file names. Warn if we detect conflicting + outputs to the same file. */ void -open_files (void) +compute_output_file_names (void) { - compute_base_names (); - - finput = xfopen (infile, "r"); - - 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); - 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); -} + char const *name[4]; + int i; + int j; + int names = 0; + compute_base_names (); + /* If not yet done. */ + if (!src_extension) + src_extension = ".c"; + if (!header_extension) + header_extension = ".h"; -/*-----------------------------------------------------. -| Close the open files, produce all the output files. | -`-----------------------------------------------------*/ + name[names++] = parser_file_name = + spec_outfile ? spec_outfile : concat2 (full_base_name, src_extension); -void -output_files (void) -{ - xfclose (fguard); - 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 (! spec_defines_file) + spec_defines_file = concat2 (full_base_name, header_extension); + name[names++] = spec_defines_file; + } - /* 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 (graph_flag) + { + if (! spec_graph_file) + spec_graph_file = concat2 (short_base_name, ".vcg"); + name[names++] = spec_graph_file; + } + + if (report_flag) + { + spec_verbose_file = concat2 (short_base_name, OUTPUT_EXT); + name[names++] = spec_verbose_file; + } - /* If we produced a semantic parser ATTRS_OBSTACK must be dumped - into its own file, ATTTRSFILE. */ - if (semantic_parser) - obstack_save (&attrs_obstack, attrsfile); + for (j = 0; j < names; j++) + for (i = 0; i < j; i++) + if (strcmp (name[i], name[j]) == 0) + warn (_("conflicting outputs to file %s"), quote (name[i])); }