curl.h: change some enums to defines with L suffix

To help applications do the right thing easier, change some enum values
into defines with L suffixes so that they get the corect type (long)
easier when used with curl_easy_setopt(). This also fixes a few of our
own libtests.

To reduce the risk that this change breaks the compile for any existing
users, the previously provided enums are still provided, but the values
to use are not defined by the enums.

This change "magically" fixes a few RTSP test failures we have had on
64-bit platforms because those options were not see using longs
properly.

Closes #16482

include/curl/curl.h

@@ -2302,32 +2302,33 @@ enum {
 /*
  * Public API enums for RTSP requests
  */
-enum {
-    CURL_RTSPREQ_NONE, /* first in list */
-    CURL_RTSPREQ_OPTIONS,
-    CURL_RTSPREQ_DESCRIBE,
-    CURL_RTSPREQ_ANNOUNCE,
-    CURL_RTSPREQ_SETUP,
-    CURL_RTSPREQ_PLAY,
-    CURL_RTSPREQ_PAUSE,
-    CURL_RTSPREQ_TEARDOWN,
-    CURL_RTSPREQ_GET_PARAMETER,
-    CURL_RTSPREQ_SET_PARAMETER,
-    CURL_RTSPREQ_RECORD,
-    CURL_RTSPREQ_RECEIVE,
-    CURL_RTSPREQ_LAST /* last in list */
-};
+
+#define CURL_RTSPREQ_NONE          0L
+#define CURL_RTSPREQ_OPTIONS       1L
+#define CURL_RTSPREQ_DESCRIBE      2L
+#define CURL_RTSPREQ_ANNOUNCE      3L
+#define CURL_RTSPREQ_SETUP         4L
+#define CURL_RTSPREQ_PLAY          5L
+#define CURL_RTSPREQ_PAUSE         6L
+#define CURL_RTSPREQ_TEARDOWN      7L
+#define CURL_RTSPREQ_GET_PARAMETER 8L
+#define CURL_RTSPREQ_SET_PARAMETER 9L
+#define CURL_RTSPREQ_RECORD        10L
+#define CURL_RTSPREQ_RECEIVE       11L
+#define CURL_RTSPREQ_LAST          12L /* not used */
 
   /* These enums are for use with the CURLOPT_NETRC option. */
+#define CURL_NETRC_IGNORED  0L /* The .netrc will never be read.
+                                  This is the default. */
+#define CURL_NETRC_OPTIONAL 1L /* A user:password in the URL will be preferred
+                                  to one in the .netrc. */
+#define CURL_NETRC_REQUIRED 2L /* A user:password in the URL will be ignored.
+                                  Unless one is set programmatically, the
+                                  .netrc will be queried. */
 enum CURL_NETRC_OPTION {
-  CURL_NETRC_IGNORED,     /* The .netrc will never be read.
-                           * This is the default. */
-  CURL_NETRC_OPTIONAL,    /* A user:password in the URL will be preferred
-                           * to one in the .netrc. */
-  CURL_NETRC_REQUIRED,    /* A user:password in the URL will be ignored.
-                           * Unless one is set programmatically, the .netrc
-                           * will be queried. */
-  CURL_NETRC_LAST
+  /* we set a single member here, just to make sure we still provide the enum,
+     but the values to use are defined above with L suffixes */
+  CURL_NETRC_LAST = 3
 };
 
 #define CURL_SSLVERSION_DEFAULT 0
@@ -2351,10 +2352,13 @@ enum CURL_NETRC_OPTION {
   /* never use, keep last */
 #define CURL_SSLVERSION_MAX_LAST    (CURL_SSLVERSION_LAST    << 16)
 
+#define CURL_TLSAUTH_NONE 0L
+#define CURL_TLSAUTH_SRP  1L
+
 enum CURL_TLSAUTH {
-  CURL_TLSAUTH_NONE,
-  CURL_TLSAUTH_SRP,
-  CURL_TLSAUTH_LAST /* never use, keep last */
+  /* we set a single member here, just to make sure we still provide the enum,
+     but the values to use are defined above with L suffixes */
+  CURL_TLSAUTH_LAST = 2
 };
 
 /* symbols to use with CURLOPT_POSTREDIR.
@@ -2369,14 +2373,16 @@ enum CURL_TLSAUTH {
 #define CURL_REDIR_POST_ALL \
     (CURL_REDIR_POST_301|CURL_REDIR_POST_302|CURL_REDIR_POST_303)
 
+#define CURL_TIMECOND_NONE         0L
+#define CURL_TIMECOND_IFMODSINCE   1L
+#define CURL_TIMECOND_IFUNMODSINCE 2L
+#define CURL_TIMECOND_LASTMOD      3L
+
 typedef enum {
-  CURL_TIMECOND_NONE,
-
-  CURL_TIMECOND_IFMODSINCE,
-  CURL_TIMECOND_IFUNMODSINCE,
-  CURL_TIMECOND_LASTMOD,
-
-  CURL_TIMECOND_LAST
+  /* we set a single member here, just to make sure we still provide
+     the enum typedef, but the values to use are defined above with L
+     suffixes */
+  CURL_TIMECOND_LAST = 4
 } curl_TimeCond;
 
 /* Special size_t value signaling a null-terminated string. */

lib/setopt.c

@@ -438,7 +438,7 @@ static CURLcode setopt_long(struct Curl_easy *data, CURLoption option,
      */
     if((arg < CURL_TIMECOND_NONE) || (arg >= CURL_TIMECOND_LAST))
       return CURLE_BAD_FUNCTION_ARGUMENT;
-    data->set.timecondition = (unsigned char)(curl_TimeCond)arg;
+    data->set.timecondition = (unsigned char)arg;
     break;
   case CURLOPT_TIMEVALUE:
     /*

src/tool_cfgable.h

@@ -200,7 +200,7 @@ struct OperationConfig {
   long expect100timeout_ms;
   long happy_eyeballs_timeout_ms; /* happy eyeballs timeout in milliseconds.
                                      0 is valid. default: CURL_HET_DEFAULT. */
-  curl_TimeCond timecond;
+  unsigned long timecond;
   HttpReq httpreq;
   int proxyver;             /* set to CURLPROXY_HTTP* define */
   int ftp_ssl_ccc_mode;

src/tool_operate.c

@@ -1397,7 +1397,7 @@ static CURLcode config2setopts(struct GlobalConfig *global,
   my_setopt(curl, CURLOPT_COOKIESESSION, config->cookiesession ?
             1L : 0L);
 
-  my_setopt_enum(curl, CURLOPT_TIMECONDITION, (long)config->timecond);
+  my_setopt_enum(curl, CURLOPT_TIMECONDITION, config->timecond);
   my_setopt(curl, CURLOPT_TIMEVALUE_LARGE, config->condtime);
   my_setopt_str(curl, CURLOPT_CUSTOMREQUEST, config->customrequest);
   customrequest_helper(config, config->httpreq, config->customrequest);