fix: resize arrays as much as needed

src/msh.c

@@ -17,8 +17,9 @@
 #define HISTORY_FILE_NAME "/history.log"
 #define LOCAL_SHARE_DIRNAME "/.local/share/msh"
 
-#define DEFAULTLINECAPACITY     128
-#define DEFAULTTOKENSCAPACITY   32
+#define DEFAULTLINECAPACITY     256
+#define DEFAULTTOKENSCAPACITY   64
+#define DEFAULTHISTORYCAPACITY  128
 
 const int LINESIZE = 512;
 
@@ -267,8 +268,13 @@ int main(int argc, char** argv) {
     }
     tokenworkcapacity = DEFAULTLINECAPACITY;
 
-    historycapacity = 16;
+    historycapacity = DEFAULTHISTORYCAPACITY;
     history = calloc(historycapacity, sizeof(char*));
+    if (history == NULL) {
+        retval = 1;
+        goto cleanup;
+    }
+    memset(history, 0, historycapacity);
 
     // Main loop
     while(1) {
@@ -379,7 +385,7 @@ int main(int argc, char** argv) {
             linelen++;
 
             // Are we out of capacity? Double line length
-            if (linelen >= linecapacity - 1) {
+            while (linelen >= linecapacity - 1) {
                 linecapacity *= 2;
                 line = realloc(line, linecapacity);
                 if (line == NULL) {
@@ -409,7 +415,7 @@ print_prompt:
         fprintf(historyfile, "%s\n", line);
         fflush(historyfile);
         
-        if (tokenworkcapacity < linelen - 1) {
+        while (tokenworkcapacity < linelen - 1) {
             tokenworkcapacity *= 2;
             tokenwork = realloc(tokenwork, tokenworkcapacity);
         }
@@ -422,8 +428,7 @@ print_prompt:
         }
 
 
-        // TEMPORARY
-        if (historyi >= historycapacity) {
+        while (historyi >= historycapacity) {
             historycapacity *= 2;
             history = reallocarray(history, historycapacity, sizeof(char*));
 
@@ -431,6 +436,7 @@ print_prompt:
                 retval = 1;
                 goto cleanup;
             }
+            memset(history + historyi, 0, (historycapacity - historyi) * sizeof(char*));
         }
         // change ownership of line to history
         history[historyi++] = line;
@@ -448,7 +454,7 @@ print_prompt:
 
             tokens[ntokens] = token;
 
-            if (ntokens >= tokenscapacity - 1) {
+            while (ntokens >= tokenscapacity - 1) {
                 tokenscapacity *= 2;
                 tokens = reallocarray(tokens, tokenscapacity, sizeof(char*));
             }