cppcheck: fix warnings

- Get rid of variable that was generating false positive warning
(unitialized)

- Fix issues in tests

- Reduce scope of several variables all over

etc

Closes #2631

src/tool_cb_dbg.c

@@ -50,15 +50,15 @@ int tool_debug_cb(CURL *handle, curl_infotype type,
   FILE *output = config->errors;
   const char *text;
   struct timeval tv;
-  struct tm *now;
   char timebuf[20];
   time_t secs;
-  static time_t epoch_offset;
-  static int    known_offset;
 
   (void)handle; /* not used */
 
   if(config->tracetime) {
+    struct tm *now;
+    static time_t epoch_offset;
+    static int    known_offset;
     tv = tvnow();
     if(!known_offset) {
       epoch_offset = time(NULL) - tv.tv_sec;
@@ -101,14 +101,14 @@ int tool_debug_cb(CURL *handle, curl_infotype type,
     static const char * const s_infotype[] = {
       "*", "<", ">", "{", "}", "{", "}"
     };
-    size_t i;
-    size_t st = 0;
     static bool newl = FALSE;
     static bool traced_data = FALSE;
 
     switch(type) {
     case CURLINFO_HEADER_OUT:
       if(size > 0) {
+        size_t st = 0;
+        size_t i;
         for(i = 0; i < size - 1; i++) {
           if(data[i] == '\n') { /* LF */
             if(!newl) {

src/tool_cb_prg.c

@@ -113,12 +113,6 @@ int tool_progress_cb(void *clientp,
   /* The original progress-bar source code was written for curl by Lars Aas,
      and this new edition inherits some of his concepts. */
 
-  char line[MAX_BARLENGTH + 1];
-  char format[40];
-  double frac;
-  double percent;
-  int barwidth;
-  int num;
   struct timeval now = tvnow();
   struct ProgressData *bar = (struct ProgressData *)clientp;
   curl_off_t total;
@@ -154,6 +148,12 @@ int tool_progress_cb(void *clientp,
   bar->calls++;
 
   if((total > 0) && (point != bar->prev)) {
+    char line[MAX_BARLENGTH + 1];
+    char format[40];
+    double frac;
+    double percent;
+    int barwidth;
+    int num;
     if(point > total)
       /* we have got more than the expected total! */
       total = point;

src/tool_formparse.c

@@ -123,13 +123,12 @@ static int read_field_headers(struct OperationConfig *config,
 {
   size_t hdrlen = 0;
   size_t pos = 0;
-  int c;
   bool incomment = FALSE;
   int lineno = 1;
   char hdrbuf[999]; /* Max. header length + 1. */
 
   for(;;) {
-    c = getc(fp);
+    int c = getc(fp);
     if(c == EOF || (!pos && !ISSPACE(c))) {
       /* Strip and flush the current header. */
       while(hdrlen && ISSPACE(hdrbuf[hdrlen - 1]))
@@ -563,7 +562,6 @@ int formparse(struct OperationConfig *config,
   struct curl_slist *headers = NULL;
   curl_mimepart *part = NULL;
   CURLcode res;
-  int sep = '\0';
 
   /* Allocate the main mime structure if needed. */
   if(!*mimepost) {
@@ -585,6 +583,7 @@ int formparse(struct OperationConfig *config,
   /* Scan for the end of the name. */
   contp = strchr(contents, '=');
   if(contp) {
+    int sep = '\0';
     if(contp > contents)
       name = contents;
     *contp++ = '\0';

src/tool_getparam.c

@@ -506,8 +506,7 @@ ParameterError getparameter(const char *flag, /* f or -long-flag */
 
   *usedarg = FALSE; /* default is that we don't use the arg */
 
-  if(('-' != flag[0]) ||
-     (('-' == flag[0]) && ('-' == flag[1]))) {
+  if(('-' != flag[0]) || ('-' == flag[1])) {
     /* this should be a long name */
     const char *word = ('-' == flag[0]) ? flag + 2 : flag;
     size_t fnam = strlen(word);
@@ -2155,7 +2154,6 @@ ParameterError parse_args(struct GlobalConfig *config, int argc,
     orig_opt = argv[i];
 
     if(stillflags && ('-' == argv[i][0])) {
-      char *nextarg;
       bool passarg;
       char *flag = argv[i];
 
@@ -2164,7 +2162,7 @@ ParameterError parse_args(struct GlobalConfig *config, int argc,
            following (URL) argument to start with -. */
         stillflags = FALSE;
       else {
-        nextarg = (i < (argc - 1)) ? argv[i + 1] : NULL;
+        char *nextarg = (i < (argc - 1)) ? argv[i + 1] : NULL;
 
         result = getparameter(flag, nextarg, &passarg, config, operation);
         if(result == PARAM_NEXT_OPERATION) {

src/tool_libinfo.c

@@ -76,7 +76,6 @@ CURLcode get_libcurl_info(void)
     {  NULL,    0                }
   };
 
-  struct proto_name_pattern const *p;
   const char *const *proto;
 
   /* Pointer to libcurl's run-time version information */
@@ -88,6 +87,7 @@ CURLcode get_libcurl_info(void)
   built_in_protos = 0;
   if(curlinfo->protocols) {
     for(proto = curlinfo->protocols; *proto; proto++) {
+      struct proto_name_pattern const *p;
       for(p = possibly_built_in; p->proto_name; p++) {
         if(curl_strequal(*proto, p->proto_name)) {
           built_in_protos |= p->proto_pattern;

src/tool_msgs.c

@@ -109,8 +109,8 @@ void warnf(struct GlobalConfig *config, const char *fmt, ...)
 
 void helpf(FILE *errors, const char *fmt, ...)
 {
-  va_list ap;
   if(fmt) {
+    va_list ap;
     va_start(ap, fmt);
     fputs("curl: ", errors); /* prefix it */
     vfprintf(errors, fmt, ap);

src/tool_paramhlp.c

@@ -58,14 +58,14 @@ struct getout *new_getout(struct OperationConfig *config)
 
 ParameterError file2string(char **bufp, FILE *file)
 {
-  char buffer[256];
   char *ptr;
   char *string = NULL;
-  size_t stringlen = 0;
-  size_t buflen;
 
   if(file) {
+    char buffer[256];
+    size_t stringlen = 0;
     while(fgets(buffer, sizeof(buffer), file)) {
+      size_t buflen;
       ptr = strchr(buffer, '\r');
       if(ptr)
         *ptr = '\0';
@@ -91,11 +91,11 @@ ParameterError file2memory(char **bufp, size_t *size, FILE *file)
 {
   char *newbuf;
   char *buffer = NULL;
-  size_t alloc = 512;
   size_t nused = 0;
-  size_t nread;
 
   if(file) {
+    size_t nread;
+    size_t alloc = 512;
     do {
       if(!buffer || (alloc == nused)) {
         /* size_t overflow detection for huge files */

src/tool_parsecfg.c

@@ -46,11 +46,9 @@ static char *my_get_line(FILE *fp);
 /* return 0 on everything-is-fine, and non-zero otherwise */
 int parseconfig(const char *filename, struct GlobalConfig *global)
 {
-  int res;
   FILE *file;
   char filebuffer[512];
   bool usedarg = FALSE;
-  char *home;
   int rc = 0;
   struct OperationConfig *operation = global->first;
 
@@ -58,8 +56,8 @@ int parseconfig(const char *filename, struct GlobalConfig *global)
     /* NULL or no file name attempts to load .curlrc from the homedir! */
 
 #ifndef __AMIGA__
+    char *home = homedir();    /* portable homedir finder */
     filename = CURLRC;   /* sensible default */
-    home = homedir();    /* portable homedir finder */
     if(home) {
       if(strlen(home) < (sizeof(filebuffer) - strlen(CURLRC))) {
         snprintf(filebuffer, sizeof(filebuffer),
@@ -125,13 +123,13 @@ int parseconfig(const char *filename, struct GlobalConfig *global)
     char *option;
     char *param;
     int lineno = 0;
-    bool alloced_param;
     bool dashed_option;
 
     while(NULL != (aline = my_get_line(file))) {
+      int res;
+      bool alloced_param = FALSE;
       lineno++;
       line = aline;
-      alloced_param = FALSE;
 
       /* line with # in the first non-blank column is a comment! */
       while(*line && ISSPACE(*line))

src/tool_urlglob.c

@@ -622,12 +622,12 @@ CURLcode glob_match_url(char **result, char *filename, URLGlob *glob)
 
   while(*filename) {
     if(*filename == '#' && ISDIGIT(filename[1])) {
-      unsigned long i;
       char *ptr = filename;
       unsigned long num = strtoul(&filename[1], &filename, 10);
       URLPattern *pat = NULL;
 
       if(num < glob->size) {
+        unsigned long i;
         num--; /* make it zero based */
         /* find the correct glob entry */
         for(i = 0; i<glob->size; i++) {

src/tool_writeout.c

@@ -122,9 +122,9 @@ void ourWriteOut(CURL *curl, struct OutStruct *outs, const char *writeinfo)
       else {
         /* this is meant as a variable to output */
         char *end;
-        char keepit;
-        int i;
         if('{' == ptr[1]) {
+          char keepit;
+          int i;
           bool match = FALSE;
           end = strchr(ptr, '}');
           ptr += 2; /* pass the % and the { */