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Diffstat (limited to 'stdlib/isomac.c')
| -rw-r--r-- | stdlib/isomac.c | 438 |
1 files changed, 438 insertions, 0 deletions
diff --git a/stdlib/isomac.c b/stdlib/isomac.c new file mode 100644 index 0000000000..47040e61e6 --- /dev/null +++ b/stdlib/isomac.c @@ -0,0 +1,438 @@ +/* Check system header files for ISO 9899:1990 (ISO C) compliance. + Copyright (C) 1996, 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Jens Schweikhardt <schweikh@noc.dfn.de>, 1996. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License + as published by the Free Software Foundation; either version 2 of + the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be + useful, but WITHOUT ANY WARRANTY; without even the implied warranty + of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If + not, write to the Free Software Foundation, Inc., 59 Temple Place - + Suite 330, Boston, MA 02111-1307, USA. */ + +/* This is a simple minded program that tries to find illegal macro + definitions in system header files. Illegal macro definitions are + those not from the implementation namespace (i.e. not starting with + an underscore) or not matching any identifier mandated by The + Standard. Some common macro names are considered okay, e.g. all those + beginning with E (which may be defined in <errno.h>) or ending in + _MAX. See the arrays prefix[] and suffix[] below for details. + + In a compliant implementation no other macros can be defined, because + you could write strictly conforming programs that may fail to compile + due to syntax errors: suppose <stdio.h> defines PIPE_BUF, then the + conforming + + #include <assert.h> + #include <stdio.h> <- or where the bogus macro is defined + #include <string.h> + #define STR(x) #x + #define XSTR(x) STR(x) + int main (void) + { + int PIPE_BUF = 0; + assert (strcmp ("PIPE_BUF", XSTR (PIPE_BUF)) == 0); + return 0; + } + + is expected to compile and meet the assertion. If it does not, your + compiler compiles some other language than Standard C. + + REQUIREMENTS: + This program calls gcc to get the list of defined macros. If you + don't have gcc you're probably out of luck unless your compiler or + preprocessor has something similar to gcc's -dM option. Tune + PRINT_MACROS in this case. This program assumes headers are found + under /usr/include and that there is a writable /tmp directory. + Tune SYSTEM_INCLUDE and TMPFILE if your system differs. + #define BROKEN_SYSTEM if system(NULL) bombs -- one more violation + of ISO C, by the way. + + OUTPUT: + Each header file name is printed, followed by illegal macro names + and their definition. For the above example, you would see + ... + /usr/include/stdio.h + #define PIPE_BUF 5120 + ... + If your implementation does not yet incorporate Amendment 1 you + will see messages about iso646.h, wctype.h and wchar.h not being + found. */ + +#ifndef _GNU_SOURCE +# define _GNU_SOURCE 1 +#endif + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#define TMPFILE "/tmp/macros" +#define HEADER_MAX 256 + +/* ISO C header names including Amendment 1 (without ".h" suffix). */ +static char *header[] = +{ + "assert", "ctype", "errno", "float", "iso646", "limits", "locale", + "math", "setjmp", "signal", "stdarg", "stddef", "stdio", "stdlib", + "string", "time", "wchar", "wctype" +}; + +/* Macros with these prefixes are considered okay. */ +static char *prefix[] = +{ + "_", "E", "is", "str", "mem", "SIG", "FLT_", "DBL_", "LDBL_", + "LC_", "wmem", "wcs" +}; + +/* Macros with these suffixes are considered okay. Will not work for + parametrized macros with arguments. */ +static char *suffix[] = +{ + "_MAX", "_MIN" +}; + +/* These macros are considered okay. In fact, these are just more prefixes. */ +static char *macros[] = +{ + "BUFSIZ", "CHAR_BIT", "CHAR_MAX", "CHAR_MIN", "CLOCKS_PER_SEC", + "DBL_DIG", "DBL_EPSILON", "DBL_MANT_DIG", "DBL_MAX", + "DBL_MAX_10_EXP", "DBL_MAX_EXP", "DBL_MIN", "DBL_MIN_10_EXP", + "DBL_MIN_EXP", "EDOM", "EILSEQ", "EOF", "ERANGE", "EXIT_FAILURE", + "EXIT_SUCCESS", "FILENAME_MAX", "FLT_DIG", "FLT_EPSILON", + "FLT_MANT_DIG", "FLT_MAX", "FLT_MAX_10_EXP", "FLT_MAX_EXP", + "FLT_MIN", "FLT_MIN_10_EXP", "FLT_MIN_EXP", "FLT_RADIX", + "FLT_ROUNDS", "FOPEN_MAX", "HUGE_VAL", "INT_MAX", "INT_MIN", + "LC_ALL", "LC_COLLATE", "LC_CTYPE", "LC_MONETARY", "LC_NUMERIC", + "LC_TIME", "LDBL_DIG", "LDBL_EPSILON", "LDBL_MANT_DIG", "LDBL_MAX", + "LDBL_MAX_10_EXP", "LDBL_MAX_EXP", "LDBL_MIN", "LDBL_MIN_10_EXP", + "LDBL_MIN_EXP", "LONG_MAX", "LONG_MIN", "L_tmpnam", "MB_CUR_MAX", + "MB_LEN_MAX", "NDEBUG", "NULL", "RAND_MAX", "SCHAR_MAX", + "SCHAR_MIN", "SEEK_CUR", "SEEK_END", "SEEK_SET", "SHRT_MAX", + "SHRT_MIN", "SIGABRT", "SIGFPE", "SIGILL", "SIGINT", "SIGSEGV", + "SIGTERM", "SIG_DFL", "SIG_ERR", "SIG_IGN", "TMP_MAX", "UCHAR_MAX", + "UINT_MAX", "ULONG_MAX", "USHRT_MAX", "WCHAR_MAX", "WCHAR_MIN", + "WEOF", "_IOFBF", "_IOLBF", "_IONBF", "abort", "abs", "acos", + "acosf", "acosl", "and", "and_eq", "asctime", "asin", "asinf", + "asinl", "assert", "atan", "atan2", "atan2f", "atan2l", "atanf", + "atanl", "atexit", "atof", "atoi", "atol", "bitand", "bitor", + "bsearch", "btowc", "calloc", "ceil", "ceilf", "ceill", "clearerr", + "clock", "clock_t", "compl", "cos", "cosf", "cosh", "coshf", + "coshl", "cosl", "ctime", "difftime", "div", "div_t", "errno", + "exit", "exp", "expf", "expl", "fabs", "fabsf", "fabsl", "fclose", + "feof", "ferror", "fflush", "fgetc", "fgetpos", "fgets", "fgetwc", + "fgetws", "floor", "floorf", "floorl", "fmod", "fmodf", "fmodl", + "fopen", "fprintf", "fputc", "fputs", "fputwc", "fputws", "fread", + "free", "freopen", "frexp", "frexpf", "frexpl", "fscanf", "fseek", + "fsetpos", "ftell", "fwide", "fwprintf", "fwrite", "fwscanf", + "getc", "getchar", "getenv", "gets", "getwc", "getwchar", "gmtime", + "isalnum", "isalpha", "iscntrl", "isdigit", "isgraph", "islower", + "isprint", "ispunct", "isspace", "isupper", "iswalnum", "iswalpha", + "iswcntrl", "iswctype", "iswdigit", "iswgraph", "iswlower", + "iswprint", "iswpunct", "iswspace", "iswupper", "iswxdigit", + "isxdigit", "labs", "ldexp", "ldexpf", "ldexpl", "ldiv", "ldiv_t", + "localeconv", "localtime", "log", "log10", "log10f", "log10l", + "logf", "logl", "longjmp", "malloc", "mblen", "mbrlen", "mbrtowc", + "mbsinit", "mbsrtowcs", "mbstate_t", "mbstowcs", "mbtowc", "memchr", + "memcmp", "memcpy", "memmove", "memset", "mktime", "modf", "modff", + "modfl", "not", "not_eq", "offsetof", "or", "or_eq", "perror", + "pow", "powf", "powl", "printf", "ptrdiff_t", "putc", "putchar", + "puts", "putwc", "putwchar", "qsort", "raise", "rand", "realloc", + "remove", "rename", "rewind", "scanf", "setbuf", "setjmp", + "setlocale", "setvbuf", "sig_atomic_t", "signal", "sin", "sinf", + "sinh", "sinhf", "sinhl", "sinl", "size_t", "sprintf", "sqrt", + "sqrtf", "sqrtl", "srand", "sscanf", "stderr", "stdin", "stdout", + "strcat", "strchr", "strcmp", "strcoll", "strcpy", "strcspn", + "strerror", "strftime", "strlen", "strncat", "strncmp", "strncpy", + "strpbrk", "strrchr", "strspn", "strstr", "strtod", "strtok", + "strtol", "strtoul", "strxfrm", "swprintf", "swscanf", "system", + "tan", "tanf", "tanh", "tanhf", "tanhl", "tanl", "time", "time_t", + "tmpfile", "tmpnam", "tolower", "toupper", "towctrans", "towlower", + "towupper", "ungetc", "ungetwc", "va_arg", "va_end", "va_start", + "vfprintf", "vfwprintf", "vprintf", "vsprintf", "vswprintf", + "vwprintf", "wchar_t", "wcrtomb", "wcscat", "wcschr", "wcscmp", + "wcscoll", "wcscpy", "wcscspn", "wcsftime", "wcslen", "wcsncat", + "wcsncmp", "wcsncpy", "wcspbrk", "wcsrchr", "wcsrtombs", "wcsspn", + "wcsstr", "wcstod", "wcstok", "wcstol", "wcstombs", "wcstoul", + "wcsxfrm", "wctob", "wctomb", "wctrans", "wctrans_t", "wctype", + "wctype_t", "wint_t", "wmemchr", "wmemcmp", "wmemcpy", "wmemmove", + "wmemset", "wprintf", "wscanf", "xor", "xor_eq" +}; + +#define NUMBER_OF_HEADERS (sizeof header / sizeof *header) +#define NUMBER_OF_PREFIXES (sizeof prefix / sizeof *prefix) +#define NUMBER_OF_SUFFIXES (sizeof suffix / sizeof *suffix) +#define NUMBER_OF_MACROS (sizeof macros / sizeof *macros) + + +/* Format string to build command to invoke compiler. */ +static const char fmt[] = "\ +echo \"#include <%s>\" |\ +%s -E -dM -ansi -pedantic %s -D_LIBC -I. -I `%s --print-prog-name=include` -\ +> %s"; + + +/* The compiler we use (given on the command line). */ +char *CC; +/* The -I parameters for CC to find all headers. */ +char *INC; + +static char *xstrndup (const char *, size_t); +static const char **get_null_defines (void); +static int check_header (const char *, const char **); + +int +main (int argc, char *argv[]) +{ + int h; + int result = 0; + const char **ignore_list; + + CC = argc > 1 ? argv[1] : "gcc"; + INC = argc > 2 ? argv[2] : ""; + + if (system (NULL) == 0) + { + puts ("Sorry, no command processor."); + return EXIT_FAILURE; + } + + /* First get list of symbols which are defined by the compiler. */ + ignore_list = get_null_defines (); + + fputs ("Tested files:\n", stdout); + + for (h = 0; h < NUMBER_OF_HEADERS; ++h) + { + char file_name[HEADER_MAX]; + sprintf (file_name, "%s.h", header[h]); + result |= check_header (file_name, ignore_list); + } + + /* The test suite should return errors but for now this is not + practical. Give a warning and ask the user to correct the bugs. */ + return result; +} + + +static char * +xstrndup (const char *s, size_t n) +{ + size_t len = n; + char *new = malloc (len + 1); + + if (new == NULL) + return NULL; + + new[len] = '\0'; + return memcpy (new, s, len); +} + + +static const char ** +get_null_defines (void) +{ + char line[BUFSIZ], *command; + char **result = NULL; + size_t result_len = 0; + size_t result_max = 0; + FILE *input; + int first = 1; + + command = malloc (sizeof fmt + sizeof "/dev/null" + 2 * strlen (CC) + + strlen (INC) + strlen (TMPFILE)); + + if (command == NULL) + { + puts ("No more memory."); + exit (1); + } + + sprintf (command, fmt, "/dev/null", CC, INC, CC, TMPFILE); + + if (system (command)) + { + puts ("system() returned nonzero"); + return NULL; + } + free (command); + input = fopen (TMPFILE, "r"); + + if (input == NULL) + { + printf ("Could not read %s: ", TMPFILE); + perror (NULL); + return NULL; + } + + while (fgets (line, sizeof line, input) != NULL) + { + int i, okay = 0; + size_t endmac; + char *start, *end; + if (strlen (line) < 9 || line[7] != ' ') + { /* "#define A" */ + printf ("Malformed input, expected '#define MACRO'\ngot '%s'\n", + line); + continue; + } + if (line[8] == '_') + /* It's a safe identifier. */ + continue; + if (result_len == result_max) + { + result_max += 10; + result = realloc (result, result_max * sizeof (char **)); + if (result == NULL) + { + puts ("No more memory."); + exit (1); + } + } + start = &line[8]; + for (end = start + 1; !isspace (*end) && *end != '\0'; ++end) + ; + result[result_len++] = xstrndup (start, end - start); + + if (first) + { + fputs ("The following identifiers will be ignored since the compiler defines them\nby default:\n", stdout); + first = 0; + } + puts (result[result_len - 1]); + } + if (result_len == result_max) + { + result_max += 1; + result = realloc (result, result_max * sizeof (char **)); + if (result == NULL) + { + puts ("No more memory."); + exit (1); + } + } + result[result_len] = NULL; + fclose (input); + remove (TMPFILE); + + return (const char **) result; +} + + +static int +check_header (const char *file_name, const char **except) +{ + char line[BUFSIZ], *command; + FILE *input; + int result = 0; + + command = malloc (sizeof fmt + strlen (file_name) + 2 * strlen (CC) + + strlen (INC) + strlen (TMPFILE)); + + if (command == NULL) + { + puts ("No more memory."); + exit (1); + } + + puts (file_name); + sprintf (command, fmt, file_name, CC, INC, CC, TMPFILE); + + if (system (command)) + { + puts ("system() returned nonzero"); + result = 1; + } + free (command); + input = fopen (TMPFILE, "r"); + + if (input == NULL) + { + printf ("Could not read %s: ", TMPFILE); + perror (NULL); + return 1; + } + + while (fgets (line, sizeof line, input) != NULL) + { + int i, okay = 0; + size_t endmac; + const char **cpp; + if (strlen (line) < 9 || line[7] != ' ') + { /* "#define A" */ + printf ("Malformed input, expected '#define MACRO'\ngot '%s'\n", + line); + result = 1; + continue; + } + for (i = 0; i < NUMBER_OF_PREFIXES; ++i) + { + if (!strncmp (line+8, prefix[i], strlen (prefix[i]))) { + ++okay; + break; + } + } + if (okay) + continue; + for (i = 0; i < NUMBER_OF_MACROS; ++i) + { + if (!strncmp (line + 8, macros[i], strlen (macros[i]))) + { + ++okay; + break; + } + } + if (okay) + continue; + /* Find next char after the macro identifier; this can be either + a space or an open parenthesis. */ + endmac = strcspn (line + 8, " ("); + if (line[8+endmac] == '\0') + { + printf ("malformed input, expected '#define MACRO VALUE'\n" + "got '%s'\n", line); + result = 1; + continue; + } + for (i = 0; i < NUMBER_OF_SUFFIXES; ++i) + { + size_t len = strlen (suffix[i]); + if (!strncmp (line + 8 + endmac - len, suffix[i], len)) + { + ++okay; + break; + } + } + if (okay) + continue; + if (except != NULL) + for (cpp = except; *cpp != NULL; ++cpp) + { + size_t len = strlen (*cpp); + if (!strncmp (line + 8, *cpp, len) && isspace (line[8 + len])) + { + ++okay; + break; + } + } + if (!okay) + { + fputs (line, stdout); + result = 2; + } + } + fclose (input); + remove (TMPFILE); + + return result; +} + +/* EOF */ |