Implemented lz_sb_append_cstr

lazy.h

@@ -33,6 +33,8 @@ size_t lz_hm_hash_void_get(size_t cap, _Bool *exists, _Bool *tombstones,
 size_t lz_hm_hash_void_set(size_t cap, _Bool *exists,
                             _Bool *tombstones, void* key, size_t k_s);
 Lz_Slc lz_slc_from_cstr(char *dat);
+void lz_sb_append_cstr(Lz_SB *sb, const char *cstr);
+void lz_sb_add_char(Lz_SB *sb, char c);
 char *lz_cstr_dup(const char *s);
 
 double lz_slc_atof(Lz_Slc *src);
@@ -397,6 +399,40 @@ Lz_SB lz_sb_from_cstr(const char *dat) {
   return sb;
 }
 
+#define lz_da_append(da, x) do { \
+  if ((da).cap > (da).cnt) {\
+    (da).data[(da).cnt++] = (x);\
+  } else if((da).cap == 0) {\
+    (da).data = malloc(256*sizeof(*(da).data));\
+    (da).cap = 256;\
+    (da).cnt = 0;\
+    (da).data[(da).cnt++] = (x);\
+  } else {\
+    (da).data = realloc((da).data, sizeof(*(da).data)*(da).cap*(2));\
+    (da).cap *= 2;\
+    (da).data[(da).cnt++] = (x);\
+  }\
+} while(0)
+
+void lz_sb_add_char(Lz_SB *sb, char c) {
+  if (sb->cap > sb->cnt) {
+    sb->data[sb->cnt++] = c;
+  } else if(sb.cap == 0) {
+    sb->data = malloc(256*sizeof(*sb->data));
+    sb->cap = 256;
+    sb->cnt = 0;
+    sb->data[sb->cnt++] = c;
+  } else {
+    sb->data = realloc(sb->data, sizeof(*sb->data)*sb->cap*2);
+    sb->cap *= 2;
+    sb->data[sb->cnt++] = c;
+  }
+}
+
+void lz_sb_append_cstr(Lz_SB *sb, const char *cstr) {
+  while (*cstr++) {lz_sb_add_char(sb, *cstr);}
+}
+
 Lz_Slc lz_slc_from_cstr(char *dat) {
   Lz_Slc out = {0};
   out.data = dat;