1 files changed, 99 insertions, 0 deletions
diff --git a/src/istring.c b/src/istring.c
new file mode 100644
index 0000000..663c06a
--- /dev/null
+++ b/src/istring.c
@@ -0,0 +1,99 @@
+/*
+Copyright 2015 Ian Jauslin
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+#include <stdlib.h>
+#include "istring.h"
+
+char* str_concat(char* ptr, const char* str){
+  char* str_ptr=(char*)str;
+
+  while(*str_ptr!='\0'){
+    *ptr=*str_ptr;
+    ptr++;
+    str_ptr++;
+  }
+  *ptr='\0';
+  return(ptr);
+}
+
+int str_concat_memorysafe(char** str_out, int pos, const char* str, int* memory){
+  char* out_ptr;
+
+  if(str_len((char*)str)+pos>=*memory){
+    *memory=*memory+str_len((char*)str)+pos+1;
+    resize_str(str_out,*memory);
+  }
+  out_ptr=*str_out+pos;
+  str_concat(out_ptr,str);
+  return(0);
+}
+
+int resize_str(char** out, int memory){
+  char* tmp_str=calloc(memory,sizeof(char));
+  char* tmp_ptr=tmp_str;
+  char* out_ptr=*out;
+
+  for(;*out_ptr!='\0';out_ptr++,tmp_ptr++){
+    *tmp_ptr=*out_ptr;
+  }
+  *tmp_ptr='\0';
+
+  free(*out);
+  *out=tmp_str;
+  return(0);
+}
+
+char* str_addchar(char* ptr, const char c){
+  *ptr=c;
+  ptr++;
+  *ptr='\0';
+  return(ptr);
+}
+
+int str_len(char* str){
+  char* ptr=str;
+  int ret=0;
+  while(*ptr!='\0'){ret++;ptr++;}
+  return(ret);
+}
+
+int str_cmp(char* str1, char* str2){
+  char* ptr1=str1;
+  char* ptr2=str2;
+  while(*ptr1==*ptr2 && *ptr1!='\0' && *ptr2!='\0'){
+    ptr1++;
+    ptr2++;
+  }
+  if(*ptr1=='\0' && *ptr2=='\0'){
+    return(1);
+  }
+  else{
+    return(0);
+  }
+}
+
+
+int str_cpy_noalloc(char* input, char* output){
+  char* ptr;
+  char* out_ptr;
+
+  for(ptr=input,out_ptr=output;*ptr!='\0';ptr++,out_ptr++){
+    *out_ptr=*ptr;
+  }
+  *out_ptr='\0';
+  return(0);
+}
+