X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;ds=sidebyside;f=gas%2Finput-file.c;h=01cc669feffb8522b6c01c2ae25cc565698c32c8;hb=b44d461b0ebcb9f30595e5c3e4c748775349ecf1;hp=f001e521035d0b9b9f019678e690251f1b86f942;hpb=f7e42eb4af140e0068476b586464eaed5569548d;p=binutils-gdb.git diff --git a/gas/input-file.c b/gas/input-file.c index f001e521035..01cc669feff 100644 --- a/gas/input-file.c +++ b/gas/input-file.c @@ -1,5 +1,5 @@ /* input_file.c - Deal with Input Files - - Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1999, 2000 + Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1999, 2000, 2001, 2003 Free Software Foundation, Inc. This file is part of GAS, the GNU Assembler. @@ -19,81 +19,77 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ -/* - * Confines all details of reading source bytes to this module. - * All O/S specific crocks should live here. - * What we lose in "efficiency" we gain in modularity. - * Note we don't need to #include the "as.h" file. No common coupling! - */ +/* Confines all details of reading source bytes to this module. + All O/S specific crocks should live here. + What we lose in "efficiency" we gain in modularity. + Note we don't need to #include the "as.h" file. No common coupling! */ #include #include - +#include #include "as.h" #include "input-file.h" +#include "safe-ctype.h" -static int input_file_get PARAMS ((char *, int)); +static int input_file_get (char *, int); /* This variable is non-zero if the file currently being read should be - preprocessed by app. It is zero if the file can be read straight in. - */ + preprocessed by app. It is zero if the file can be read straight in. */ int preprocess = 0; -/* - * This code opens a file, then delivers BUFFER_SIZE character - * chunks of the file on demand. - * BUFFER_SIZE is supposed to be a number chosen for speed. - * The caller only asks once what BUFFER_SIZE is, and asks before - * the nature of the input files (if any) is known. - */ +/* This code opens a file, then delivers BUFFER_SIZE character + chunks of the file on demand. + BUFFER_SIZE is supposed to be a number chosen for speed. + The caller only asks once what BUFFER_SIZE is, and asks before + the nature of the input files (if any) is known. */ #define BUFFER_SIZE (32 * 1024) -/* - * We use static data: the data area is not sharable. - */ +/* We use static data: the data area is not sharable. */ static FILE *f_in; static char *file_name; /* Struct for saving the state of this module for file includes. */ -struct saved_file { - FILE *f_in; - char *file_name; - int preprocess; - char *app_save; -}; +struct saved_file + { + FILE * f_in; + char * file_name; + int preprocess; + char * app_save; + }; -/* These hooks accomodate most operating systems. */ +/* These hooks accommodate most operating systems. */ void -input_file_begin () +input_file_begin (void) { f_in = (FILE *) 0; } void -input_file_end () +input_file_end (void) { } /* Return BUFFER_SIZE. */ unsigned int -input_file_buffer_size () +input_file_buffer_size (void) { return (BUFFER_SIZE); } int -input_file_is_open () +input_file_is_open (void) { return f_in != (FILE *) 0; } /* Push the state of our input, returning a pointer to saved info that can be restored with input_file_pop (). */ + char * -input_file_push () +input_file_push (void) { register struct saved_file *saved; @@ -105,18 +101,18 @@ input_file_push () if (preprocess) saved->app_save = app_push (); - input_file_begin (); /* Initialize for new file */ + /* Initialize for new file. */ + input_file_begin (); return (char *) saved; } void -input_file_pop (arg) - char *arg; +input_file_pop (char *arg) { register struct saved_file *saved = (struct saved_file *) arg; - input_file_end (); /* Close out old file */ + input_file_end (); /* Close out old file. */ f_in = saved->f_in; file_name = saved->file_name; @@ -128,9 +124,8 @@ input_file_pop (arg) } void -input_file_open (filename, pre) - char *filename; /* "" means use stdin. Must not be 0. */ - int pre; +input_file_open (char *filename, /* "" means use stdin. Must not be 0. */ + int pre) { int c; char buf[80]; @@ -139,33 +134,57 @@ input_file_open (filename, pre) assert (filename != 0); /* Filename may not be NULL. */ if (filename[0]) - { /* We have a file name. Suck it and see. */ - f_in = fopen (filename, "r"); + { + f_in = fopen (filename, FOPEN_RT); file_name = filename; } else - { /* use stdin for the input file. */ + { + /* Use stdin for the input file. */ f_in = stdin; - file_name = _("{standard input}"); /* For error messages. */ + /* For error messages. */ + file_name = _("{standard input}"); } - if (f_in == (FILE *) 0) + + if (f_in) + c = getc (f_in); + + if (f_in == NULL || ferror (f_in)) { - as_bad (_("Can't open %s for reading."), file_name); - as_perror ("%s", file_name); +#ifdef BFD_ASSEMBLER + bfd_set_error (bfd_error_system_call); +#endif + as_perror (_("Can't open %s for reading"), file_name); + + if (f_in) + { + fclose (f_in); + f_in = NULL; + } return; } - c = getc (f_in); if (c == '#') - { /* Begins with comment, may not want to preprocess */ + { + /* Begins with comment, may not want to preprocess. */ c = getc (f_in); if (c == 'N') { fgets (buf, 80, f_in); - if (!strcmp (buf, "O_APP\n")) + if (!strncmp (buf, "O_APP", 5) && ISSPACE (buf[5])) preprocess = 0; if (!strchr (buf, '\n')) - ungetc ('#', f_in); /* It was longer */ + ungetc ('#', f_in); /* It was longer. */ + else + ungetc ('\n', f_in); + } + else if (c == 'A') + { + fgets (buf, 80, f_in); + if (!strncmp (buf, "PP", 2) && ISSPACE (buf[2])) + preprocess = 1; + if (!strchr (buf, '\n')) + ungetc ('#', f_in); else ungetc ('\n', f_in); } @@ -179,28 +198,30 @@ input_file_open (filename, pre) } /* Close input file. */ + void -input_file_close () +input_file_close (void) { + /* Don't close a null file pointer. */ if (f_in != NULL) - { - fclose (f_in); - } /* don't close a null file pointer */ + fclose (f_in); + f_in = 0; } /* This function is passed to do_scrub_chars. */ static int -input_file_get (buf, buflen) - char *buf; - int buflen; +input_file_get (char *buf, int buflen) { int size; size = fread (buf, sizeof (char), buflen, f_in); if (size < 0) { +#ifdef BFD_ASSEMBLER + bfd_set_error (bfd_error_system_call); +#endif as_perror (_("Can't read from %s"), file_name); size = 0; } @@ -210,26 +231,26 @@ input_file_get (buf, buflen) /* Read a buffer from the input file. */ char * -input_file_give_next_buffer (where) - char *where; /* Where to place 1st character of new buffer. */ +input_file_give_next_buffer (char *where /* Where to place 1st character of new buffer. */) { char *return_value; /* -> Last char of what we read, + 1. */ register int size; if (f_in == (FILE *) 0) return 0; - /* - * fflush (stdin); could be done here if you want to synchronise - * stdin and stdout, for the case where our input file is stdin. - * Since the assembler shouldn't do any output to stdout, we - * don't bother to synch output and input. - */ + /* fflush (stdin); could be done here if you want to synchronise + stdin and stdout, for the case where our input file is stdin. + Since the assembler shouldn't do any output to stdout, we + don't bother to synch output and input. */ if (preprocess) size = do_scrub_chars (input_file_get, where, BUFFER_SIZE); else size = fread (where, sizeof (char), BUFFER_SIZE, f_in); if (size < 0) { +#ifdef BFD_ASSEMBLER + bfd_set_error (bfd_error_system_call); +#endif as_perror (_("Can't read from %s"), file_name); size = 0; } @@ -238,9 +259,15 @@ input_file_give_next_buffer (where) else { if (fclose (f_in)) - as_perror (_("Can't close %s"), file_name); + { +#ifdef BFD_ASSEMBLER + bfd_set_error (bfd_error_system_call); +#endif + as_perror (_("Can't close %s"), file_name); + } f_in = (FILE *) 0; return_value = 0; } - return (return_value); + + return return_value; }