#include <brotli/decode.h>
#endif
-void Curl_version_init(void);
-
-/* For thread safety purposes this function is called by global_init so that
- the static data in both version functions is initialized. */
-void Curl_version_init(void)
-{
- curl_version();
- curl_version_info(CURLVERSION_NOW);
-}
-
#ifdef HAVE_BROTLI
static size_t brotli_version(char *buf, size_t bufsz)
{
}
#endif
+/*
+ * curl_version() returns a pointer to a static buffer.
+ *
+ * It is implemented to work multi-threaded by making sure repeated invokes
+ * generate the exact same string and never write any temporary data like
+ * zeros in the data.
+ */
char *curl_version(void)
{
- static bool initialized;
- static char version[250];
- char *ptr = version;
- size_t len;
- size_t left = sizeof(version);
-
- if(initialized)
- return version;
-
- strcpy(ptr, LIBCURL_NAME "/" LIBCURL_VERSION);
- len = strlen(ptr);
- left -= len;
- ptr += len;
-
- len = Curl_ssl_version(ptr + 1, left - 1);
-
- if(len > 0) {
- *ptr = ' ';
- left -= ++len;
- ptr += len;
- }
+ static char out[250];
+ char *outp;
+ size_t outlen;
+ const char *src[14];
+#ifdef USE_SSL
+ char ssl_version[40];
+#endif
+#ifdef HAVE_LIBZ
+ char z_version[40];
+#endif
+#ifdef HAVE_BROTLI
+ char br_version[40] = "brotli/";
+#endif
+#ifdef USE_ARES
+ char cares_version[40];
+#endif
+#if defined(USE_LIBIDN2) || defined(USE_WIN32_IDN)
+ char idn_version[40];
+#endif
+#ifdef USE_LIBPSL
+ char psl_version[40];
+#endif
+#if defined(HAVE_ICONV) && defined(CURL_DOES_CONVERSIONS)
+ char iconv_version[40]="iconv";
+#endif
+#ifdef USE_SSH
+ char ssh_version[40];
+#endif
+#ifdef USE_NGHTTP2
+ char h2_version[40];
+#endif
+#ifdef ENABLE_QUIC
+ char h3_version[40];
+#endif
+#ifdef USE_LIBRTMP
+ char rtmp_version[40];
+#endif
+ int i = 0;
+ int j;
+ src[i++] = LIBCURL_NAME "/" LIBCURL_VERSION;
+#ifdef USE_SSL
+ Curl_ssl_version(ssl_version, sizeof(ssl_version));
+ src[i++] = ssl_version;
+#endif
#ifdef HAVE_LIBZ
- len = msnprintf(ptr, left, " zlib/%s", zlibVersion());
- left -= len;
- ptr += len;
+ msnprintf(z_version, sizeof(z_version), "zlib/%s", zlibVersion());
+ src[i++] = z_version;
#endif
#ifdef HAVE_BROTLI
- len = msnprintf(ptr, left, "%s", " brotli/");
- left -= len;
- ptr += len;
- len = brotli_version(ptr, left);
- left -= len;
- ptr += len;
+ brotli_version(&br_version[7], sizeof(br_version) - 7);
+ src[i++] = br_version;
#endif
#ifdef USE_ARES
- /* this function is only present in c-ares, not in the original ares */
- len = msnprintf(ptr, left, " c-ares/%s", ares_version(NULL));
- left -= len;
- ptr += len;
+ msnprintf(cares_version, sizeof(cares_version),
+ "c-ares/%s", ares_version(NULL));
+ src[i++] = cares_version;
#endif
#ifdef USE_LIBIDN2
if(idn2_check_version(IDN2_VERSION)) {
- len = msnprintf(ptr, left, " libidn2/%s", idn2_check_version(NULL));
- left -= len;
- ptr += len;
+ msnprintf(idn_version, sizeof(idn_version),
+ "libidn2/%s", idn2_check_version(NULL));
+ src[i++] = idn_version;
}
+#elif defined(USE_WIN32_IDN)
+ msnprintf(idn_version, sizeof(idn_version), "WinIDN");
+ src[i++] = idn_version;
#endif
+
#ifdef USE_LIBPSL
- len = msnprintf(ptr, left, " libpsl/%s", psl_get_version());
- left -= len;
- ptr += len;
-#endif
-#ifdef USE_WIN32_IDN
- len = msnprintf(ptr, left, " WinIDN");
- left -= len;
- ptr += len;
+ msnprintf(psl_version, sizeof(psl_version), "libpsl/%s", psl_get_version());
+ src[i++] = psl_version;
#endif
#if defined(HAVE_ICONV) && defined(CURL_DOES_CONVERSIONS)
#ifdef _LIBICONV_VERSION
- len = msnprintf(ptr, left, " iconv/%d.%d",
- _LIBICONV_VERSION >> 8, _LIBICONV_VERSION & 255);
+ msnprintf(iconv_version, sizeof(iconv_version), "iconv/%d.%d",
+ _LIBICONV_VERSION >> 8, _LIBICONV_VERSION & 255);
#else
- /* version unknown */
- len = msnprintf(ptr, left, " iconv");
+ /* version unknown, let the default stand */
#endif /* _LIBICONV_VERSION */
- left -= len;
- ptr += len;
+ src[i++] = iconv_version;
#endif
#ifdef USE_SSH
- if(left) {
- *ptr++=' ';
- left--;
- }
- len = Curl_ssh_version(ptr, left);
- left -= len;
- ptr += len;
+ Curl_ssh_version(ssh_version, sizeof(ssh_version));
+ src[i++] = ssh_version;
#endif
#ifdef USE_NGHTTP2
- len = Curl_http2_ver(ptr, left);
- left -= len;
- ptr += len;
+ Curl_http2_ver(h2_version, sizeof(h2_version));
+ src[i++] = h2_version;
#endif
#ifdef ENABLE_QUIC
- len = Curl_quic_ver(ptr, left);
- left -= len;
- ptr += len;
+ Curl_quic_ver(h3_version, sizeof(h3_version));
+ src[i++] = h3_version;
#endif
#ifdef USE_LIBRTMP
{
else
suff[0] = '\0';
- msnprintf(ptr, left, " librtmp/%d.%d%s",
+ msnprintf(rtmp_version, sizeof(rtmp_version), "librtmp/%d.%d%s",
RTMP_LIB_VERSION >> 16, (RTMP_LIB_VERSION >> 8) & 0xff,
suff);
-/*
- If another lib version is added below this one, this code would
- also have to do:
-
- len = what msnprintf() returned
-
- left -= len;
- ptr += len;
-*/
+ src[i++] = rtmp_version;
}
#endif
- /* Silent scan-build even if librtmp is not enabled. */
- (void) left;
- (void) ptr;
+ outp = &out[0];
+ outlen = sizeof(out);
+ for(j = 0; j < i; j++) {
+ size_t n = strlen(src[j]);
+ /* we need room for a space, the string and the final zero */
+ if(outlen <= (n + 2))
+ break;
+ if(j) {
+ /* prepend a space if not the first */
+ *outp++ = ' ';
+ outlen--;
+ }
+ memcpy(outp, src[j], n);
+ outp += n;
+ outlen -= n;
+ }
+ *outp = 0;
- initialized = true;
- return version;
+ return out;
}
/* data for curl_version_info
curl_version_info_data *curl_version_info(CURLversion stamp)
{
- static bool initialized;
#if defined(USE_SSH)
static char ssh_buffer[80];
#endif
static char brotli_buffer[80];
#endif
- if(initialized)
- return &version_info;
-
#ifdef USE_SSL
Curl_ssl_version(ssl_buffer, sizeof(ssl_buffer));
version_info.ssl_version = ssl_buffer;
#endif
(void)stamp; /* avoid compiler warnings, we don't use this */
-
- initialized = true;
return &version_info;
}
projects / thirdparty / curl.git / commitdiff
