From dcf4de20a1904bb31d498b6cc999a37f20b2783d Mon Sep 17 00:00:00 2001 From: Denis Vlasenko Date: Tue, 1 May 2007 20:07:29 +0000 Subject: test: code size saving, no logic changes ps: fix warning, make a bit smaller kill -l: make smaller & know much more signals function old new delta get_signum 121 153 +32 kill_main 826 843 +17 get_signame 44 36 -8 signals 252 224 -28 .rodata 131955 131923 -32 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/3 up/down: 49/-68) Total: -19 bytes --- coreutils/test.c | 177 ++++++++++++++++++++++++++++--------------------------- 1 file changed, 90 insertions(+), 87 deletions(-) (limited to 'coreutils') diff --git a/coreutils/test.c b/coreutils/test.c index e9b6276..70b392f 100644 --- a/coreutils/test.c +++ b/coreutils/test.c @@ -85,12 +85,12 @@ enum token { RPAREN, OPERAND }; -#define __is_int_op(a) (((unsigned char)((a) - INTEQ)) <= 5) -#define __is_str_op(a) (((unsigned char)((a) - STREZ)) <= 5) -#define __is_file_op(a) (((unsigned char)((a) - FILNT)) <= 2) -#define __is_file_access(a) (((unsigned char)((a) - FILRD)) <= 2) -#define __is_file_type(a) (((unsigned char)((a) - FILREG)) <= 5) -#define __is_file_bit(a) (((unsigned char)((a) - FILSUID)) <= 2) +#define is_int_op(a) (((unsigned char)((a) - INTEQ)) <= 5) +#define is_str_op(a) (((unsigned char)((a) - STREZ)) <= 5) +#define is_file_op(a) (((unsigned char)((a) - FILNT)) <= 2) +#define is_file_access(a) (((unsigned char)((a) - FILRD)) <= 2) +#define is_file_type(a) (((unsigned char)((a) - FILREG)) <= 5) +#define is_file_bit(a) (((unsigned char)((a) - FILSUID)) <= 2) enum token_types { UNOP, BINOP, @@ -100,64 +100,67 @@ enum token_types { }; static const struct t_op { - const char * const op_text; + char op_text[4]; unsigned char op_num, op_type; } ops[] = { - { - "-r", FILRD, UNOP}, { - "-w", FILWR, UNOP}, { - "-x", FILEX, UNOP}, { - "-e", FILEXIST, UNOP}, { - "-f", FILREG, UNOP}, { - "-d", FILDIR, UNOP}, { - "-c", FILCDEV, UNOP}, { - "-b", FILBDEV, UNOP}, { - "-p", FILFIFO, UNOP}, { - "-u", FILSUID, UNOP}, { - "-g", FILSGID, UNOP}, { - "-k", FILSTCK, UNOP}, { - "-s", FILGZ, UNOP}, { - "-t", FILTT, UNOP}, { - "-z", STREZ, UNOP}, { - "-n", STRNZ, UNOP}, { - "-h", FILSYM, UNOP}, /* for backwards compat */ - { - "-O", FILUID, UNOP}, { - "-G", FILGID, UNOP}, { - "-L", FILSYM, UNOP}, { - "-S", FILSOCK, UNOP}, { - "=", STREQ, BINOP}, { - "==", STREQ, BINOP}, { - "!=", STRNE, BINOP}, { - "<", STRLT, BINOP}, { - ">", STRGT, BINOP}, { - "-eq", INTEQ, BINOP}, { - "-ne", INTNE, BINOP}, { - "-ge", INTGE, BINOP}, { - "-gt", INTGT, BINOP}, { - "-le", INTLE, BINOP}, { - "-lt", INTLT, BINOP}, { - "-nt", FILNT, BINOP}, { - "-ot", FILOT, BINOP}, { - "-ef", FILEQ, BINOP}, { - "!", UNOT, BUNOP}, { - "-a", BAND, BBINOP}, { - "-o", BOR, BBINOP}, { - "(", LPAREN, PAREN}, { - ")", RPAREN, PAREN}, { - 0, 0, 0} + { "-r", FILRD , UNOP }, + { "-w", FILWR , UNOP }, + { "-x", FILEX , UNOP }, + { "-e", FILEXIST, UNOP }, + { "-f", FILREG , UNOP }, + { "-d", FILDIR , UNOP }, + { "-c", FILCDEV , UNOP }, + { "-b", FILBDEV , UNOP }, + { "-p", FILFIFO , UNOP }, + { "-u", FILSUID , UNOP }, + { "-g", FILSGID , UNOP }, + { "-k", FILSTCK , UNOP }, + { "-s", FILGZ , UNOP }, + { "-t", FILTT , UNOP }, + { "-z", STREZ , UNOP }, + { "-n", STRNZ , UNOP }, + { "-h", FILSYM , UNOP }, /* for backwards compat */ + + { "-O" , FILUID , UNOP }, + { "-G" , FILGID , UNOP }, + { "-L" , FILSYM , UNOP }, + { "-S" , FILSOCK, UNOP }, + { "=" , STREQ , BINOP }, + { "==" , STREQ , BINOP }, + { "!=" , STRNE , BINOP }, + { "<" , STRLT , BINOP }, + { ">" , STRGT , BINOP }, + { "-eq", INTEQ , BINOP }, + { "-ne", INTNE , BINOP }, + { "-ge", INTGE , BINOP }, + { "-gt", INTGT , BINOP }, + { "-le", INTLE , BINOP }, + { "-lt", INTLT , BINOP }, + { "-nt", FILNT , BINOP }, + { "-ot", FILOT , BINOP }, + { "-ef", FILEQ , BINOP }, + { "!" , UNOT , BUNOP }, + { "-a" , BAND , BBINOP }, + { "-o" , BOR , BBINOP }, + { "(" , LPAREN , PAREN }, + { ")" , RPAREN , PAREN }, }; -#ifdef CONFIG_FEATURE_TEST_64 +enum { NUM_OPS = sizeof(ops) / sizeof(ops[0]) }; + +#if ENABLE_FEATURE_TEST_64 typedef int64_t arith_t; #else typedef int arith_t; #endif +/* Cannot eliminate these static data (do the G trick) + * because of bb_test usage from other applets */ static char **t_wp; static struct t_op const *t_wp_op; static gid_t *group_array; static int ngroups; +static jmp_buf leaving; static enum token t_lex(char *s); static arith_t oexpr(enum token n); @@ -176,8 +179,6 @@ static int test_eaccess(char *path, int mode); static int is_a_group_member(gid_t gid); static void initialize_group_array(void); -static jmp_buf leaving; - int bb_test(int argc, char **argv) { int res; @@ -210,7 +211,7 @@ int bb_test(int argc, char **argv) * isn't likely in the case of a shell. paranoia * prevails... */ - ngroups = 0; + ngroups = 0; /* Implement special cases from POSIX.2, section 4.62.4 */ if (argc == 1) @@ -223,8 +224,9 @@ int bb_test(int argc, char **argv) if (argc == 3) return *argv[2] != '\0'; _off = argc - 4; - if (t_lex(argv[2+_off]), t_wp_op && t_wp_op->op_type == BINOP) { - t_wp = &argv[1+_off]; + t_lex(argv[2 + _off]); + if (t_wp_op && t_wp_op->op_type == BINOP) { + t_wp = &argv[1 + _off]; return binop() == 0; } } @@ -238,6 +240,7 @@ int bb_test(int argc, char **argv) return res; } +static void syntax(const char *op, const char *msg) ATTRIBUTE_NORETURN; static void syntax(const char *op, const char *msg) { if (op && *op) { @@ -296,20 +299,20 @@ static arith_t primary(enum token n) if (*++t_wp == NULL) syntax(t_wp_op->op_text, "argument expected"); if (n == STREZ) - return strlen(*t_wp) == 0; - else if (n == STRNZ) - return strlen(*t_wp) != 0; - else if (n == FILTT) + return t_wp[0][0] == '\0'; + if (n == STRNZ) + return t_wp[0][0] != '\0'; + if (n == FILTT) return isatty(getn(*t_wp)); - else - return filstat(*t_wp, n); + return filstat(*t_wp, n); } - if (t_lex(t_wp[1]), t_wp_op && t_wp_op->op_type == BINOP) { + t_lex(t_wp[1]); + if (t_wp_op && t_wp_op->op_type == BINOP) { return binop(); } - return strlen(*t_wp) > 0; + return t_wp[0][0] != '\0'; } static int binop(void) @@ -322,10 +325,11 @@ static int binop(void) (void) t_lex(*++t_wp); op = t_wp_op; - if ((opnd2 = *++t_wp) == (char *) 0) + opnd2 = *++t_wp; + if (opnd2 == NULL) syntax(op->op_text, "argument expected"); - if (__is_int_op(op->op_num)) { + if (is_int_op(op->op_num)) { val1 = getn(opnd1); val2 = getn(opnd2); if (op->op_num == INTEQ) @@ -341,7 +345,7 @@ static int binop(void) if (op->op_num == INTLT) return val1 < val2; } - if (__is_str_op(op->op_num)) { + if (is_str_op(op->op_num)) { val1 = strcmp(opnd1, opnd2); if (op->op_num == STREQ) return val1 == 0; @@ -355,7 +359,7 @@ static int binop(void) /* We are sure that these three are by now the only binops we didn't check * yet, so we do not check if the class is correct: */ -/* if (__is_file_op(op->op_num)) */ +/* if (is_file_op(op->op_num)) */ { struct stat b1, b2; @@ -390,7 +394,7 @@ static int filstat(char *nm, enum token mode) return 0; if (mode == FILEXIST) return 1; - else if (__is_file_access(mode)) { + if (is_file_access(mode)) { if (mode == FILRD) i = R_OK; if (mode == FILWR) @@ -399,7 +403,7 @@ static int filstat(char *nm, enum token mode) i = X_OK; return test_eaccess(nm, i) == 0; } - else if (__is_file_type(mode)) { + if (is_file_type(mode)) { if (mode == FILREG) i = S_IFREG; if (mode == FILDIR) @@ -422,10 +426,10 @@ static int filstat(char *nm, enum token mode) return 0; #endif } -filetype: + filetype: return ((s.st_mode & S_IFMT) == i); } - else if (__is_file_bit(mode)) { + if (is_file_bit(mode)) { if (mode == FILSUID) i = S_ISUID; if (mode == FILSGID) @@ -434,33 +438,33 @@ filetype: i = S_ISVTX; return ((s.st_mode & i) != 0); } - else if (mode == FILGZ) + if (mode == FILGZ) return s.st_size > 0L; - else if (mode == FILUID) + if (mode == FILUID) return s.st_uid == geteuid(); - else if (mode == FILGID) + if (mode == FILGID) return s.st_gid == getegid(); - else - return 1; /* NOTREACHED */ - + return 1; /* NOTREACHED */ } static enum token t_lex(char *s) { - struct t_op const *op = ops; + const struct t_op *op; - if (s == 0) { - t_wp_op = (struct t_op *) 0; + t_wp_op = NULL; + if (s == NULL) { return EOI; } - while (op->op_text) { + + op = ops; + do { if (strcmp(s, op->op_text) == 0) { t_wp_op = op; return op->op_num; } op++; - } - t_wp_op = (struct t_op *) 0; + } while (op < ops + NUM_OPS); + return OPERAND; } @@ -469,14 +473,14 @@ static enum token t_lex(char *s) static arith_t getn(const char *s) { char *p; -#ifdef CONFIG_FEATURE_TEST_64 +#if ENABLE_FEATURE_TEST_64 long long r; #else long r; #endif errno = 0; -#ifdef CONFIG_FEATURE_TEST_64 +#if ENABLE_FEATURE_TEST_64 r = strtoll(s, &p, 10); #else r = strtol(s, &p, 10); @@ -591,4 +595,3 @@ int test_main(int argc, char **argv) { return bb_test(argc, argv); } - -- cgit v1.1