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Windows specific vsnprintf fixes.

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* Changes flac_snprintf (in src/share/grabbag/snprintf.c) and its copy
  local_snprintf (src/libFLAC/metadata_iterators.c) to be almost sane.

* Adds flac_vsnprintf (src/share/grabbag/snprintf.c) and its copy
  local_vsnprintf (src/share/win_utf8_io/win_utf8_io.c).

* Changes stats_print_info in src/flac/utils.c so it uses flac_vsnprintf
  instead of vsnprintf. This makes return value checking unnecessary.

Patch-from: lvqcl <lvqcl.mail@gmail.com>
This commit is contained in:
Erik de Castro Lopo
2014-09-22 18:29:32 +10:00
parent e0ac5d46f0
commit 1c7e3f100f
5 changed files with 68 additions and 18 deletions
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2
include/share/compat.h
View File

@@ -188,10 +188,12 @@
*
* This function wraps the MS version to behave more like the the ISO version.
*/
#include <stdarg.h>
#ifdef __cplusplus
extern "C" {
#endif
int flac_snprintf(char *str, size_t size, const char *fmt, ...);
int flac_vsnprintf(char *str, size_t size, const char *fmt, va_list va);
#ifdef __cplusplus
};
#endif

6
src/flac/utils.c
View File

@@ -247,12 +247,8 @@ void stats_print_info(int level, const char *format, ...)
if (flac__utils_verbosity_ >= level) {
va_list args;
va_start(args, format);
len = vsnprintf(tmp, sizeof(tmp), format, args);
len = flac_vsnprintf(tmp, sizeof(tmp), format, args);
va_end(args);
if (len < 0 || len == sizeof(tmp)) {
tmp[sizeof(tmp)-1] = '\0';
len = sizeof(tmp)-1;
}
stats_clear();
if (len >= console_chars_left) {
clear_len = console_chars_left;

9
src/libFLAC/metadata_iterators.c
View File

@@ -3205,9 +3205,14 @@ local_snprintf(char *str, size_t size, const char *fmt, ...)
va_start (va, fmt);
#ifdef _MSC_VER
#if defined _MSC_VER
if (size == 0)
return 1024;
rc = vsnprintf_s (str, size, _TRUNCATE, fmt, va);
rc = (rc > 0) ? rc : (size == 0 ? 1024 : size * 2);
if (rc < 0)
rc = size - 1;
#elif defined __MINGW32__
rc = __mingw_vsnprintf (str, size, fmt, va);
#else
rc = vsnprintf (str, size, fmt, va);
#endif

31
src/share/grabbag/snprintf.c
View File

@@ -49,7 +49,7 @@
* does not over-write the end of the buffer. MS's snprintf_s in this case
* returns -1.
*
* The _MSC_VER code below attempts to modify the return code for snprintf_s
* The _MSC_VER code below attempts to modify the return code for vsnprintf_s
* to something that is more compatible with the behaviour of the ISO C version.
*/
@@ -61,9 +61,14 @@ flac_snprintf(char *str, size_t size, const char *fmt, ...)
va_start (va, fmt);
#ifdef _MSC_VER
#if defined _MSC_VER
if (size == 0)
return 1024;
rc = vsnprintf_s (str, size, _TRUNCATE, fmt, va);
rc = (rc > 0) ? rc : (size == 0 ? 1024 : size * 2);
if (rc < 0)
rc = size - 1;
#elif defined __MINGW32__
rc = __mingw_vsnprintf (str, size, fmt, va);
#else
rc = vsnprintf (str, size, fmt, va);
#endif
@@ -71,3 +76,23 @@ flac_snprintf(char *str, size_t size, const char *fmt, ...)
return rc;
}
int
flac_vsnprintf(char *str, size_t size, const char *fmt, va_list va)
{
int rc;
#if defined _MSC_VER
if (size == 0)
return 1024;
rc = vsnprintf_s (str, size, _TRUNCATE, fmt, va);
if (rc < 0)
rc = size - 1;
#elif defined __MINGW32__
rc = __mingw_vsnprintf (str, size, fmt, va);
#else
rc = vsnprintf (str, size, fmt, va);
#endif
return rc;
}

34
src/share/win_utf8_io/win_utf8_io.c
View File

@@ -45,6 +45,28 @@
#include "share/win_utf8_io.h"
#define UTF8_BUFFER_SIZE 32768
static
int local_vsnprintf(char *str, size_t size, const char *fmt, va_list va)
{
int rc;
#if defined _MSC_VER
if (size == 0)
return 1024;
rc = vsnprintf_s (str, size, _TRUNCATE, fmt, va);
if (rc < 0)
rc = size - 1;
#elif defined __MINGW32__
rc = __mingw_vsnprintf (str, size, fmt, va);
#else
rc = vsnprintf (str, size, fmt, va);
#endif
return rc;
}
static UINT win_utf8_io_codepage = CP_ACP;
/* convert WCHAR stored Unicode string to UTF-8. Caller is responsible for freeing memory */
@@ -177,9 +199,9 @@ int printf_utf8(const char *format, ...)
while (1) {
va_list argptr;
if (!(utmp = (char *)malloc(32768*sizeof(char)))) break;
if (!(utmp = (char *)malloc(UTF8_BUFFER_SIZE*sizeof(char)))) break;
va_start(argptr, format);
ret = vsnprintf_s(utmp, 32768, _TRUNCATE, format, argptr);
ret = local_vsnprintf(utmp, UTF8_BUFFER_SIZE, format, argptr);
va_end(argptr);
if (ret < 0) break;
if (!(wout = wchar_from_utf8(utmp))) {
@@ -203,9 +225,9 @@ int fprintf_utf8(FILE *stream, const char *format, ...)
while (1) {
va_list argptr;
if (!(utmp = (char *)malloc(32768*sizeof(char)))) break;
if (!(utmp = (char *)malloc(UTF8_BUFFER_SIZE*sizeof(char)))) break;
va_start(argptr, format);
ret = vsnprintf_s(utmp, 32768, _TRUNCATE, format, argptr);
ret = local_vsnprintf(utmp, UTF8_BUFFER_SIZE, format, argptr);
va_end(argptr);
if (ret < 0) break;
if (!(wout = wchar_from_utf8(utmp))) {
@@ -228,8 +250,8 @@ int vfprintf_utf8(FILE *stream, const char *format, va_list argptr)
int ret = -1;
while (1) {
if (!(utmp = (char *)malloc(32768*sizeof(char)))) break;
if ((ret = vsnprintf_s(utmp, 32768, _TRUNCATE, format, argptr)) < 0) break;
if (!(utmp = (char *)malloc(UTF8_BUFFER_SIZE*sizeof(char)))) break;
if ((ret = local_vsnprintf(utmp, UTF8_BUFFER_SIZE, format, argptr)) < 0) break;
if (!(wout = wchar_from_utf8(utmp))) {
ret = -1;
break;