From 31d713d069f6586c3b18aa721ccd668fa994219c Mon Sep 17 00:00:00 2001 From: Jonathan Nieder Date: Wed, 16 Mar 2011 00:14:22 -0500 Subject: [PATCH 1/2] mktag: avoid %td in format string Since v1.7.0-rc0~34 (make "mktag" a built-in, 2010-01-22), git mktag uses the C99-style %td format to print ptrdiff_t values. It falls back to %d when NO_C99_FORMAT is set, on the assumption that pre-C99 systems probably are using 32-bit pointers. But many modern systems are 64-bit and * sometimes one wants to test the NO_C99_FORMAT fallbacks using a modern development platform; * some platforms (I'm looking at you, msvc) have not gotten with the program and are still C89-only. These ptrdiff_t values are offsets from the beginning of a buffer, so a size_t or uintmax_t would work about as well. Use the latter so we can take advantage of the PRIuMAX fallback in git-compat-util.h, even on C99-challenged systems with 64-bit pointers. Signed-off-by: Jonathan Nieder Signed-off-by: Junio C Hamano --- builtin/mktag.c | 48 ++++++++++++++++++++++-------------------------- 1 file changed, 22 insertions(+), 26 deletions(-) diff --git a/builtin/mktag.c b/builtin/mktag.c index 1cb0f3f2a7..bc05227b52 100644 --- a/builtin/mktag.c +++ b/builtin/mktag.c @@ -35,12 +35,6 @@ static int verify_object(const unsigned char *sha1, const char *expected_type) return ret; } -#ifdef NO_C99_FORMAT -#define PD_FMT "%d" -#else -#define PD_FMT "%td" -#endif - static int verify_tag(char *buffer, unsigned long size) { int typelen; @@ -70,15 +64,18 @@ static int verify_tag(char *buffer, unsigned long size) /* Verify tag-line */ tag_line = strchr(type_line, '\n'); if (!tag_line) - return error("char" PD_FMT ": could not find next \"\\n\"", type_line - buffer); + return error("char%"PRIuMAX": could not find next \"\\n\"", + (uintmax_t) (type_line - buffer)); tag_line++; if (memcmp(tag_line, "tag ", 4) || tag_line[4] == '\n') - return error("char" PD_FMT ": no \"tag \" found", tag_line - buffer); + return error("char%"PRIuMAX": no \"tag \" found", + (uintmax_t) (tag_line - buffer)); /* Get the actual type */ typelen = tag_line - type_line - strlen("type \n"); if (typelen >= sizeof(type)) - return error("char" PD_FMT ": type too long", type_line+5 - buffer); + return error("char%"PRIuMAX": type too long", + (uintmax_t) (type_line+5 - buffer)); memcpy(type, type_line+5, typelen); type[typelen] = 0; @@ -95,15 +92,16 @@ static int verify_tag(char *buffer, unsigned long size) break; if (c > ' ') continue; - return error("char" PD_FMT ": could not verify tag name", tag_line - buffer); + return error("char%"PRIuMAX": could not verify tag name", + (uintmax_t) (tag_line - buffer)); } /* Verify the tagger line */ tagger_line = tag_line; if (memcmp(tagger_line, "tagger ", 7)) - return error("char" PD_FMT ": could not find \"tagger \"", - tagger_line - buffer); + return error("char%"PRIuMAX": could not find \"tagger \"", + (uintmax_t) (tagger_line - buffer)); /* * Check for correct form for name and email @@ -115,44 +113,42 @@ static int verify_tag(char *buffer, unsigned long size) if (!(lb = strstr(tagger_line, " <")) || !(rb = strstr(lb+2, "> ")) || strpbrk(tagger_line, "<>\n") != lb+1 || strpbrk(lb+2, "><\n ") != rb) - return error("char" PD_FMT ": malformed tagger field", - tagger_line - buffer); + return error("char%"PRIuMAX": malformed tagger field", + (uintmax_t) (tagger_line - buffer)); /* Check for author name, at least one character, space is acceptable */ if (lb == tagger_line) - return error("char" PD_FMT ": missing tagger name", - tagger_line - buffer); + return error("char%"PRIuMAX": missing tagger name", + (uintmax_t) (tagger_line - buffer)); /* timestamp, 1 or more digits followed by space */ tagger_line = rb + 2; if (!(len = strspn(tagger_line, "0123456789"))) - return error("char" PD_FMT ": missing tag timestamp", - tagger_line - buffer); + return error("char%"PRIuMAX": missing tag timestamp", + (uintmax_t) (tagger_line - buffer)); tagger_line += len; if (*tagger_line != ' ') - return error("char" PD_FMT ": malformed tag timestamp", - tagger_line - buffer); + return error("char%"PRIuMAX": malformed tag timestamp", + (uintmax_t) (tagger_line - buffer)); tagger_line++; /* timezone, 5 digits [+-]hhmm, max. 1400 */ if (!((tagger_line[0] == '+' || tagger_line[0] == '-') && strspn(tagger_line+1, "0123456789") == 4 && tagger_line[5] == '\n' && atoi(tagger_line+1) <= 1400)) - return error("char" PD_FMT ": malformed tag timezone", - tagger_line - buffer); + return error("char%"PRIuMAX": malformed tag timezone", + (uintmax_t) (tagger_line - buffer)); tagger_line += 6; /* Verify the blank line separating the header from the body */ if (*tagger_line != '\n') - return error("char" PD_FMT ": trailing garbage in tag header", - tagger_line - buffer); + return error("char%"PRIuMAX": trailing garbage in tag header", + (uintmax_t) (tagger_line - buffer)); /* The actual stuff afterwards we don't care about.. */ return 0; } -#undef PD_FMT - int cmd_mktag(int argc, const char **argv, const char *prefix) { struct strbuf buf = STRBUF_INIT; From 28bd70d811391be10c55ce4aee1b6ee991d7a86b Mon Sep 17 00:00:00 2001 From: Jonathan Nieder Date: Wed, 16 Mar 2011 00:15:31 -0500 Subject: [PATCH 2/2] unbreak and eliminate NO_C99_FORMAT In the spirit of v1.5.0.2~21 (Check for PRIuMAX rather than NO_C99_FORMAT in fast-import.c, 2007-02-20), use PRIuMAX from git-compat-util.h on all platforms instead of C99-specific formats like %zu with dangerous fallbacks to %u or %lu. So now C99-challenged platforms can build git without provoking warnings or errors from printf, even if pointers do not have the same size as an int or long. The need for a fallback PRIuMAX is detected in git-compat-util.h with "#ifndef PRIuMAX". So while at it, simplify the Makefile and configure script by eliminating the NO_C99_FORMAT knob altogether. Signed-off-by: Jonathan Nieder Signed-off-by: Junio C Hamano --- Makefile | 14 -------------- alloc.c | 11 ++--------- config.mak.in | 1 - configure.ac | 24 ------------------------ sha1_file.c | 9 ++------- 5 files changed, 4 insertions(+), 55 deletions(-) diff --git a/Makefile b/Makefile index 775ee838c3..d9243aad9b 100644 --- a/Makefile +++ b/Makefile @@ -45,11 +45,6 @@ all:: # Define NO_D_TYPE_IN_DIRENT if your platform defines DT_UNKNOWN but lacks # d_type in struct dirent (Cygwin 1.5, fixed in Cygwin 1.7). # -# Define NO_C99_FORMAT if your formatted IO functions (printf/scanf et.al.) -# do not support the 'size specifiers' introduced by C99, namely ll, hh, -# j, z, t. (representing long long int, char, intmax_t, size_t, ptrdiff_t). -# some C compilers supported these specifiers prior to C99 as an extension. -# # Define NO_STRCASESTR if you don't have strcasestr. # # Define NO_MEMMEM if you don't have memmem. @@ -870,7 +865,6 @@ ifeq ($(uname_S),SunOS) NO_UNSETENV = YesPlease NO_SETENV = YesPlease NO_STRLCPY = YesPlease - NO_C99_FORMAT = YesPlease NO_STRTOUMAX = YesPlease GIT_TEST_CMP = cmp endif @@ -881,21 +875,18 @@ ifeq ($(uname_S),SunOS) NO_UNSETENV = YesPlease NO_SETENV = YesPlease NO_STRLCPY = YesPlease - NO_C99_FORMAT = YesPlease NO_STRTOUMAX = YesPlease GIT_TEST_CMP = cmp endif ifeq ($(uname_R),5.8) NO_UNSETENV = YesPlease NO_SETENV = YesPlease - NO_C99_FORMAT = YesPlease NO_STRTOUMAX = YesPlease GIT_TEST_CMP = cmp endif ifeq ($(uname_R),5.9) NO_UNSETENV = YesPlease NO_SETENV = YesPlease - NO_C99_FORMAT = YesPlease NO_STRTOUMAX = YesPlease GIT_TEST_CMP = cmp endif @@ -1074,7 +1065,6 @@ ifeq ($(uname_S),Windows) NO_MEMMEM = YesPlease # NEEDS_LIBICONV = YesPlease NO_ICONV = YesPlease - NO_C99_FORMAT = YesPlease NO_STRTOUMAX = YesPlease NO_STRTOULL = YesPlease NO_MKDTEMP = YesPlease @@ -1151,7 +1141,6 @@ ifneq (,$(findstring MINGW,$(uname_S))) NO_MEMMEM = YesPlease NEEDS_LIBICONV = YesPlease OLD_ICONV = YesPlease - NO_C99_FORMAT = YesPlease NO_STRTOUMAX = YesPlease NO_MKDTEMP = YesPlease NO_MKSTEMPS = YesPlease @@ -1354,9 +1343,6 @@ endif ifdef NO_NSEC BASIC_CFLAGS += -DNO_NSEC endif -ifdef NO_C99_FORMAT - BASIC_CFLAGS += -DNO_C99_FORMAT -endif ifdef SNPRINTF_RETURNS_BOGUS COMPAT_CFLAGS += -DSNPRINTF_RETURNS_BOGUS COMPAT_OBJS += compat/snprintf.o diff --git a/alloc.c b/alloc.c index 6ef6753d18..aeae55c976 100644 --- a/alloc.c +++ b/alloc.c @@ -51,19 +51,12 @@ DEFINE_ALLOCATOR(commit, struct commit) DEFINE_ALLOCATOR(tag, struct tag) DEFINE_ALLOCATOR(object, union any_object) -#ifdef NO_C99_FORMAT -#define SZ_FMT "%u" -#else -#define SZ_FMT "%zu" -#endif - static void report(const char *name, unsigned int count, size_t size) { - fprintf(stderr, "%10s: %8u (" SZ_FMT " kB)\n", name, count, size); + fprintf(stderr, "%10s: %8u (%"PRIuMAX" kB)\n", + name, count, (uintmax_t) size); } -#undef SZ_FMT - #define REPORT(name) \ report(#name, name##_allocs, name##_allocs*sizeof(struct name) >> 10) diff --git a/config.mak.in b/config.mak.in index 9614973057..e378534cbd 100644 --- a/config.mak.in +++ b/config.mak.in @@ -43,7 +43,6 @@ NO_D_INO_IN_DIRENT=@NO_D_INO_IN_DIRENT@ NO_D_TYPE_IN_DIRENT=@NO_D_TYPE_IN_DIRENT@ NO_SOCKADDR_STORAGE=@NO_SOCKADDR_STORAGE@ NO_IPV6=@NO_IPV6@ -NO_C99_FORMAT=@NO_C99_FORMAT@ NO_HSTRERROR=@NO_HSTRERROR@ NO_STRCASESTR=@NO_STRCASESTR@ NO_STRTOK_R=@NO_STRTOK_R@ diff --git a/configure.ac b/configure.ac index 20039c546f..dd0790725b 100644 --- a/configure.ac +++ b/configure.ac @@ -686,30 +686,6 @@ AC_CHECK_TYPE([struct addrinfo],[ ]) AC_SUBST(NO_IPV6) # -# Define NO_C99_FORMAT if your formatted IO functions (printf/scanf et.al.) -# do not support the 'size specifiers' introduced by C99, namely ll, hh, -# j, z, t. (representing long long int, char, intmax_t, size_t, ptrdiff_t). -# some C compilers supported these specifiers prior to C99 as an extension. -AC_CACHE_CHECK([whether formatted IO functions support C99 size specifiers], - [ac_cv_c_c99_format], -[# Actually git uses only %z (%zu) in alloc.c, and %t (%td) in mktag.c -AC_RUN_IFELSE( - [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT], - [[char buf[64]; - if (sprintf(buf, "%lld%hhd%jd%zd%td", (long long int)1, (char)2, (intmax_t)3, (size_t)4, (ptrdiff_t)5) != 5) - return 1; - else if (strcmp(buf, "12345")) - return 2;]])], - [ac_cv_c_c99_format=yes], - [ac_cv_c_c99_format=no]) -]) -if test $ac_cv_c_c99_format = no; then - NO_C99_FORMAT=YesPlease -else - NO_C99_FORMAT= -fi -AC_SUBST(NO_C99_FORMAT) -# # Define NO_REGEX if you have no or inferior regex support in your C library. AC_CACHE_CHECK([whether the platform regex can handle null bytes], [ac_cv_c_excellent_regex], [ diff --git a/sha1_file.c b/sha1_file.c index 27730c334c..ea99f6f313 100644 --- a/sha1_file.c +++ b/sha1_file.c @@ -25,13 +25,8 @@ #endif #endif -#ifdef NO_C99_FORMAT -#define SZ_FMT "lu" -static unsigned long sz_fmt(size_t s) { return (unsigned long)s; } -#else -#define SZ_FMT "zu" -static size_t sz_fmt(size_t s) { return s; } -#endif +#define SZ_FMT PRIuMAX +static inline uintmax_t sz_fmt(size_t s) { return s; } const unsigned char null_sha1[20];