text.c

   1 #include <string.h>
   2 #include "config.h"
   3 #include "stack.h"
   4 #include "expat.h"
   5 #include "text.h"
   6
   7 char buffer[TEXT_BUFFER_SIZE] = { 0 };
   8 char* cursor = buffer;
   9
  10 const char* text_get()
  11 {
  12         return buffer;
  13 }
  14
  15 void text_buffer(const char* str, size_t len)
  16 {
  17         /* We want to append a trailing \0, so we have one
  18          * element less. Beware, this will underflow! */
  19         size_t free = buffer + TEXT_BUFFER_SIZE - cursor - 1;
  20         size_t n   = len < free ? len : free;
  21
  22         /* Prevent overflow in memcpy(). */
  23         if (cursor == buffer + TEXT_BUFFER_SIZE) return;
  24
  25         memcpy(cursor, str, n);
  26         cursor += n;
  27         *cursor = 0;
  28 }
  29
  30 void text_enable()
  31 {
  32         expat_use_text_buffer = true;
  33         cursor = buffer;
  34         *cursor = 0;
  35 }
  36
  37 void text_disable()
  38 {
  39         expat_use_text_buffer = false;
  40         cursor = buffer;
  41         *cursor = 0;
  42 }