#endif
-/* Environment scanner. Examine the environment for controlling minor
- * aspects of the program's execution. Our philosophy here that the
- * environment should not prevent the program from running, so an
- * environment variable with a messed-up value will be interpreted in
- * the default way.
- *
- * Most of the environment is checked early in the startup sequence,
- * but other variables are checked during execution of the user's
- * program. */
-
-options_t options;
-
-
-typedef struct variable
-{
- const char *name;
- int value, *var;
- void (*init) (struct variable *);
- void (*show) (struct variable *);
- const char *desc;
- int bad;
-}
-variable;
-
-static void init_unformatted (variable *);
-
+/* Implementation of secure_getenv() for targets where it is not
+ provided. */
#ifdef FALLBACK_SECURE_GETENV
char *
#endif
-/* print_spaces()-- Print a particular number of spaces. */
-static void
-print_spaces (int n)
-{
- char buffer[80];
- int i;
-
- if (n <= 0)
- return;
+/* Examine the environment for controlling aspects of the program's
+ execution. Our philosophy here that the environment should not prevent
+ the program from running, so any invalid value will be ignored. */
- for (i = 0; i < n; i++)
- buffer[i] = ' ';
-
- buffer[i] = '\0';
-
- estr_write (buffer);
-}
+options_t options;
-/* var_source()-- Return a string that describes where the value of a
- * variable comes from */
-
-static const char *
-var_source (variable * v)
+typedef struct variable
{
- if (getenv (v->name) == NULL)
- return "Default";
-
- if (v->bad)
- return "Bad ";
-
- return "Set ";
+ const char *name;
+ int default_value;
+ int *var;
+ void (*init) (struct variable *);
}
+variable;
+
+static void init_unformatted (variable *);
-/* init_integer()-- Initialize an integer environment variable. */
+/* Initialize an integer environment variable. */
static void
init_integer (variable * v)
p = getenv (v->name);
if (p == NULL)
- goto set_default;
+ return;
for (q = p; *q; q++)
if (!isdigit (*q) && (p != q || *q != '-'))
- {
- v->bad = 1;
- goto set_default;
- }
+ return;
*v->var = atoi (p);
- return;
-
- set_default:
- *v->var = v->value;
- return;
}
-/* init_unsigned_integer()-- Initialize an integer environment variable
- which has to be positive. */
+/* Initialize an integer environment variable which has to be positive. */
static void
init_unsigned_integer (variable * v)
p = getenv (v->name);
if (p == NULL)
- goto set_default;
+ return;
for (q = p; *q; q++)
if (!isdigit (*q))
- {
- v->bad = 1;
- goto set_default;
- }
+ return;
*v->var = atoi (p);
- return;
-
- set_default:
- *v->var = v->value;
- return;
}
-/* show_integer()-- Show an integer environment variable */
-
-static void
-show_integer (variable * v)
-{
- st_printf ("%s %d\n", var_source (v), *v->var);
-}
-
-
-/* init_boolean()-- Initialize a boolean environment variable. We
- * only look at the first letter of the variable. */
+/* Initialize a boolean environment variable. We only look at the first
+ letter of the value. */
static void
init_boolean (variable * v)
p = getenv (v->name);
if (p == NULL)
- goto set_default;
+ return;
if (*p == '1' || *p == 'Y' || *p == 'y')
- {
- *v->var = 1;
- return;
- }
-
- if (*p == '0' || *p == 'N' || *p == 'n')
- {
- *v->var = 0;
- return;
- }
-
- v->bad = 1;
-
-set_default:
- *v->var = v->value;
- return;
+ *v->var = 1;
+ else if (*p == '0' || *p == 'N' || *p == 'n')
+ *v->var = 0;
}
-/* show_boolean()-- Show a boolean environment variable */
-
-static void
-show_boolean (variable * v)
-{
- st_printf ("%s %s\n", var_source (v), *v->var ? "Yes" : "No");
-}
-
+/* Initialize a list output separator. It may contain any number of spaces
+ and at most one comma. */
static void
init_sep (variable * v)
if (p == NULL)
goto set_default;
- v->bad = 1;
options.separator = p;
options.separator_len = strlen (p);
goto set_default;
}
- v->bad = 0;
return;
set_default:
}
-static void
-show_sep (variable * v)
-{
- st_printf ("%s \"%s\"\n", var_source (v), options.separator);
-}
+static variable variable_table[] = {
+ /* Unit number that will be preconnected to standard input */
+ { "GFORTRAN_STDIN_UNIT", GFC_STDIN_UNIT_NUMBER, &options.stdin_unit,
+ init_integer },
-static void
-init_string (variable * v __attribute__ ((unused)))
-{
-}
+ /* Unit number that will be preconnected to standard output */
+ { "GFORTRAN_STDOUT_UNIT", GFC_STDOUT_UNIT_NUMBER, &options.stdout_unit,
+ init_integer },
-static void
-show_string (variable * v)
-{
- const char *p;
+ /* Unit number that will be preconnected to standard error */
+ { "GFORTRAN_STDERR_UNIT", GFC_STDERR_UNIT_NUMBER, &options.stderr_unit,
+ init_integer },
- p = getenv (v->name);
- if (p == NULL)
- p = "";
+ /* If TRUE, all output will be unbuffered */
+ { "GFORTRAN_UNBUFFERED_ALL", 0, &options.all_unbuffered, init_boolean },
- estr_write (var_source (v));
- estr_write (" \"");
- estr_write (p);
- estr_write ("\"\n");
-}
+ /* If TRUE, output to preconnected units will be unbuffered */
+ { "GFORTRAN_UNBUFFERED_PRECONNECTED", 0, &options.unbuffered_preconnected,
+ init_boolean },
+ /* Whether to print filename and line number on runtime error */
+ { "GFORTRAN_SHOW_LOCUS", 1, &options.locus, init_boolean },
-static variable variable_table[] = {
- {"GFORTRAN_STDIN_UNIT", GFC_STDIN_UNIT_NUMBER, &options.stdin_unit,
- init_integer, show_integer,
- "Unit number that will be preconnected to standard input\n"
- "(No preconnection if negative)", 0},
-
- {"GFORTRAN_STDOUT_UNIT", GFC_STDOUT_UNIT_NUMBER, &options.stdout_unit,
- init_integer, show_integer,
- "Unit number that will be preconnected to standard output\n"
- "(No preconnection if negative)", 0},
-
- {"GFORTRAN_STDERR_UNIT", GFC_STDERR_UNIT_NUMBER, &options.stderr_unit,
- init_integer, show_integer,
- "Unit number that will be preconnected to standard error\n"
- "(No preconnection if negative)", 0},
-
- {"TMPDIR", 0, NULL, init_string, show_string,
- "Directory for scratch files.", 0},
-
- {"GFORTRAN_UNBUFFERED_ALL", 0, &options.all_unbuffered, init_boolean,
- show_boolean,
- "If TRUE, all output is unbuffered. This will slow down large writes "
- "but can be\nuseful for forcing data to be displayed immediately.", 0},
-
- {"GFORTRAN_UNBUFFERED_PRECONNECTED", 0, &options.unbuffered_preconnected,
- init_boolean, show_boolean,
- "If TRUE, output to preconnected units is unbuffered.", 0},
-
- {"GFORTRAN_SHOW_LOCUS", 1, &options.locus, init_boolean, show_boolean,
- "If TRUE, print filename and line number where runtime errors happen.", 0},
-
- {"GFORTRAN_OPTIONAL_PLUS", 0, &options.optional_plus, init_boolean, show_boolean,
- "Print optional plus signs in numbers where permitted. Default FALSE.", 0},
-
- {"GFORTRAN_DEFAULT_RECL", DEFAULT_RECL, &options.default_recl,
- init_unsigned_integer, show_integer,
- "Default maximum record length for sequential files. Most useful for\n"
- "adjusting line length of preconnected units. Default "
- stringize (DEFAULT_RECL), 0},
-
- {"GFORTRAN_LIST_SEPARATOR", 0, NULL, init_sep, show_sep,
- "Separator to use when writing list output. May contain any number of "
- "spaces\nand at most one comma. Default is a single space.", 0},
-
- /* GFORTRAN_CONVERT_UNIT - Set the default data conversion for
- unformatted I/O. */
- {"GFORTRAN_CONVERT_UNIT", 0, 0, init_unformatted, show_string,
- "Set format for unformatted files", 0},
-
- {"GFORTRAN_ERROR_BACKTRACE", -1, &options.backtrace,
- init_boolean, show_boolean,
- "Print out a backtrace (if possible) on runtime error", -1},
-
- {NULL, 0, NULL, NULL, NULL, NULL, 0}
+ /* Print optional plus signs in numbers where permitted */
+ { "GFORTRAN_OPTIONAL_PLUS", 0, &options.optional_plus, init_boolean },
+
+ /* Default maximum record length for sequential files */
+ { "GFORTRAN_DEFAULT_RECL", DEFAULT_RECL, &options.default_recl,
+ init_unsigned_integer },
+
+ /* Separator to use when writing list output */
+ { "GFORTRAN_LIST_SEPARATOR", 0, NULL, init_sep },
+
+ /* Set the default data conversion for unformatted I/O */
+ { "GFORTRAN_CONVERT_UNIT", 0, 0, init_unformatted },
+
+ /* Print out a backtrace if possible on runtime error */
+ { "GFORTRAN_ERROR_BACKTRACE", -1, &options.backtrace, init_boolean },
+
+ { NULL, 0, NULL, NULL }
};
-/* init_variables()-- Initialize most runtime variables from
+/* Initialize most runtime variables from
* environment variables. */
void
{
variable *v;
- for (v = variable_table; v->name; v++)
- v->init (v);
-}
-
-
-void
-show_variables (void)
-{
- variable *v;
- int n;
-
- /* TODO: print version number. */
- estr_write ("GNU Fortran runtime library version "
- "UNKNOWN" "\n\n");
-
- estr_write ("Environment variables:\n");
- estr_write ("----------------------\n");
-
for (v = variable_table; v->name; v++)
{
- n = estr_write (v->name);
- print_spaces (25 - n);
-
- if (v->show == show_integer)
- estr_write ("Integer ");
- else if (v->show == show_boolean)
- estr_write ("Boolean ");
- else
- estr_write ("String ");
-
- v->show (v);
- estr_write (v->desc);
- estr_write ("\n\n");
+ if (v->var)
+ *v->var = v->default_value;
+ v->init (v);
}
-
- /* System error codes */
-
- estr_write ("\nRuntime error codes:");
- estr_write ("\n--------------------\n");
-
- for (n = LIBERROR_FIRST + 1; n < LIBERROR_LAST; n++)
- if (n < 0 || n > 9)
- st_printf ("%d %s\n", n, translate_error (n));
- else
- st_printf (" %d %s\n", n, translate_error (n));
-
- estr_write ("\nCommand line arguments:\n");
- estr_write (" --help Print this list\n");
-
- exit (0);
}
+
/* This is the handling of the GFORTRAN_CONVERT_UNITS environment variable.
It is called from environ.c to parse this variable, and from
open.c to determine if the user specified a default for an
else
res = ILLEGAL;
return res;
-
}
/* Match an integer and store its value in unit_num. This only works
while (isdigit (*p))
unit_num = unit_num * 10 + (*p++ - '0');
return INTEGER;
-
}
/* This reads the next token from the GFORTRAN_CONVERT_UNITS variable.
projects / gcc.git / commitdiff