misc: null-terminate

Make use of this term consistently.

Closes #9527

lib/base64.c

@@ -138,7 +138,7 @@ CURLcode Curl_base64_decode(const char *src,
   /* Calculate the size of the decoded string */
   rawlen = (numQuantums * 3) - padding;
 
-  /* Allocate our buffer including room for a zero terminator */
+  /* Allocate our buffer including room for a null-terminator */
   newstr = malloc(rawlen + 1);
   if(!newstr)
     return CURLE_OUT_OF_MEMORY;

lib/curl_addrinfo.c

@@ -279,7 +279,7 @@ Curl_he2ai(const struct hostent *he, int port)
 
   for(i = 0; (curr = he->h_addr_list[i]) != NULL; i++) {
     size_t ss_size;
-    size_t namelen = strlen(he->h_name) + 1; /* include zero termination */
+    size_t namelen = strlen(he->h_name) + 1; /* include null-terminatior */
 #ifdef ENABLE_IPV6
     if(he->h_addrtype == AF_INET6)
       ss_size = sizeof(struct sockaddr_in6);

lib/doh.c

@@ -792,7 +792,7 @@ doh2ai(const struct dohentry *de, const char *hostname, int port)
 #endif
   CURLcode result = CURLE_OK;
   int i;
-  size_t hostlen = strlen(hostname) + 1; /* include zero terminator */
+  size_t hostlen = strlen(hostname) + 1; /* include null-terminator */
 
   if(!de)
     /* no input == no output! */

lib/dynbuf.h

@@ -46,7 +46,7 @@
 
 struct dynbuf {
   char *bufr;    /* point to a null-terminated allocated buffer */
-  size_t leng;   /* number of bytes *EXCLUDING* the zero terminator */
+  size_t leng;   /* number of bytes *EXCLUDING* the null-terminator */
   size_t allc;   /* size of the current allocation */
   size_t toobig; /* size limit for the buffer */
 #ifdef DEBUGBUILD

lib/headers.c

@@ -259,7 +259,7 @@ static CURLcode unfold_value(struct Curl_easy *data, const char *value,
 
   /* put the data at the end of the previous data, not the newline */
   memcpy(&newhs->value[olen], value, vlen);
-  newhs->value[olen + vlen] = 0; /* zero terminate at newline */
+  newhs->value[olen + vlen] = 0; /* null-terminate at newline */
 
   /* insert this node into the list of headers */
   Curl_llist_insert_next(&data->state.httphdrs, data->state.httphdrs.tail,

lib/mprintf.c

@@ -956,7 +956,7 @@ static int dprintf_formatf(
         else
           *fptr++ = 'f';
 
-        *fptr = 0; /* and a final zero termination */
+        *fptr = 0; /* and a final null-termination */
 
 #ifdef __clang__
 #pragma clang diagnostic push

lib/rand.c

@@ -212,7 +212,7 @@ CURLcode Curl_rand(struct Curl_easy *data, unsigned char *rnd, size_t num)
 
 /*
  * Curl_rand_hex() fills the 'rnd' buffer with a given 'num' size with random
- * hexadecimal digits PLUS a zero terminating byte. It must be an odd number
+ * hexadecimal digits PLUS a null-terminating byte. It must be an odd number
  * size.
  */
 
@@ -235,7 +235,7 @@ CURLcode Curl_rand_hex(struct Curl_easy *data, unsigned char *rnd,
     /* make sure it fits in the local buffer and that it is an odd number! */
     return CURLE_BAD_FUNCTION_ARGUMENT;
 
-  num--; /* save one for zero termination */
+  num--; /* save one for null-termination */
 
   result = Curl_rand(data, buffer, num/2);
   if(result)

lib/rand.h

@@ -42,7 +42,7 @@ CURLcode Curl_rand(struct Curl_easy *data, unsigned char *rnd, size_t num);
 
 /*
  * Curl_rand_hex() fills the 'rnd' buffer with a given 'num' size with random
- * hexadecimal digits PLUS a zero terminating byte. It must be an odd number
+ * hexadecimal digits PLUS a null-terminating byte. It must be an odd number
  * size.
  */
 CURLcode Curl_rand_hex(struct Curl_easy *data, unsigned char *rnd,

lib/vauth/digest.c

@@ -382,7 +382,7 @@ CURLcode Curl_auth_create_digest_md5_message(struct Curl_easy *data,
   if(!(qop_values & DIGEST_QOP_VALUE_AUTH))
     return CURLE_BAD_CONTENT_ENCODING;
 
-  /* Generate 32 random hex chars, 32 bytes + 1 zero termination */
+  /* Generate 32 random hex chars, 32 bytes + 1 null-termination */
   result = Curl_rand_hex(data, (unsigned char *)cnonce, sizeof(cnonce));
   if(result)
     return result;

lib/vauth/ntlm.c

@@ -658,7 +658,7 @@ CURLcode Curl_auth_create_ntlm_type3_message(struct Curl_easy *data,
                    /* LanManager response */
                    /* NT response */
 
-                   0,                /* zero termination */
+                   0,                /* null-termination */
                    0, 0, 0,          /* type-3 long, the 24 upper bits */
 
                    SHORTPAIR(0x18),  /* LanManager response length, twice */