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diff --git a/lib/xpdf/gmem.c b/lib/xpdf/gmem.c
new file mode 100644
index 0000000..a0f2cf5
--- /dev/null
+++ b/lib/xpdf/gmem.c
@@ -0,0 +1,229 @@
+/*
+ * gmem.c
+ *
+ * Memory routines with out-of-memory checking.
+ *
+ * Copyright 1996-2003 Glyph & Cog, LLC
+ */
+
+#include <aconf.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <string.h>
+#include "gmem.h"
+
+#ifdef DEBUG_MEM
+
+typedef struct _GMemHdr {
+  int size;
+  int index;
+  struct _GMemHdr *next;
+} GMemHdr;
+
+#define gMemHdrSize ((sizeof(GMemHdr) + 7) & ~7)
+#define gMemTrlSize (sizeof(long))
+
+#if gmemTrlSize==8
+#define gMemDeadVal 0xdeadbeefdeadbeefUL
+#else
+#define gMemDeadVal 0xdeadbeefUL
+#endif
+
+/* round data size so trailer will be aligned */
+#define gMemDataSize(size) \
+  ((((size) + gMemTrlSize - 1) / gMemTrlSize) * gMemTrlSize)
+
+#define gMemNLists    64
+#define gMemListShift  4
+#define gMemListMask  (gMemNLists - 1)
+static GMemHdr *gMemList[gMemNLists] = {
+  NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+  NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+  NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+  NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+  NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+  NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+  NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+  NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
+};
+
+static int gMemIndex = 0;
+static int gMemAlloc = 0;
+static int gMemInUse = 0;
+
+#endif /* DEBUG_MEM */
+
+void *gmalloc(int size) {
+#ifdef DEBUG_MEM
+  int size1;
+  char *mem;
+  GMemHdr *hdr;
+  void *data;
+  int lst;
+  unsigned long *trl, *p;
+
+  if (size == 0)
+    return NULL;
+  size1 = gMemDataSize(size);
+  if (!(mem = (char *)malloc(size1 + gMemHdrSize + gMemTrlSize))) {
+    fprintf(stderr, "Out of memory\n");
+    exit(1);
+  }
+  hdr = (GMemHdr *)mem;
+  data = (void *)(mem + gMemHdrSize);
+  trl = (unsigned long *)(mem + gMemHdrSize + size1);
+  hdr->size = size;
+  hdr->index = gMemIndex++;
+  lst = ((int)hdr >> gMemListShift) & gMemListMask;
+  hdr->next = gMemList[lst];
+  gMemList[lst] = hdr;
+  ++gMemAlloc;
+  gMemInUse += size;
+  for (p = (unsigned long *)data; p <= trl; ++p)
+    *p = gMemDeadVal;
+  return data;
+#else
+  void *p;
+
+  if (size == 0)
+    return NULL;
+  if (!(p = malloc(size))) {
+    fprintf(stderr, "Out of memory\n");
+    exit(1);
+  }
+  return p;
+#endif
+}
+
+void *grealloc(void *p, int size) {
+#ifdef DEBUG_MEM
+  GMemHdr *hdr;
+  void *q;
+  int oldSize;
+
+  if (size == 0) {
+    if (p)
+      gfree(p);
+    return NULL;
+  }
+  if (p) {
+    hdr = (GMemHdr *)((char *)p - gMemHdrSize);
+    oldSize = hdr->size;
+    q = gmalloc(size);
+    memcpy(q, p, size < oldSize ? size : oldSize);
+    gfree(p);
+  } else {
+    q = gmalloc(size);
+  }
+  return q;
+#else
+  void *q;
+
+  if (size == 0) {
+    if (p)
+      free(p);
+    return NULL;
+  }
+  if (p)
+    q = realloc(p, size);
+  else
+    q = malloc(size);
+  if (!q) {
+    fprintf(stderr, "Out of memory\n");
+    exit(1);
+  }
+  return q;
+#endif
+}
+
+void *gmallocn(int nObjs, int objSize) {
+  int n;
+
+  n = nObjs * objSize;
+  if (objSize == 0 || n / objSize != nObjs) {
+    fprintf(stderr, "Bogus memory allocation size\n");
+    exit(1);
+  }
+  return gmalloc(n);
+}
+
+void *greallocn(void *p, int nObjs, int objSize) {
+  int n;
+
+  n = nObjs * objSize;
+  if (objSize == 0 || n / objSize != nObjs) {
+    fprintf(stderr, "Bogus memory allocation size\n");
+    exit(1);
+  }
+  return grealloc(p, n);
+}
+
+void gfree(void *p) {
+#ifdef DEBUG_MEM
+  int size;
+  GMemHdr *hdr;
+  GMemHdr *prevHdr, *q;
+  int lst;
+  unsigned long *trl, *clr;
+
+  if (p) {
+    hdr = (GMemHdr *)((char *)p - gMemHdrSize);
+    lst = ((int)hdr >> gMemListShift) & gMemListMask;
+    for (prevHdr = NULL, q = gMemList[lst]; q; prevHdr = q, q = q->next) {
+      if (q == hdr)
+	break;
+    }
+    if (q) {
+      if (prevHdr)
+	prevHdr->next = hdr->next;
+      else
+	gMemList[lst] = hdr->next;
+      --gMemAlloc;
+      gMemInUse -= hdr->size;
+      size = gMemDataSize(hdr->size);
+      trl = (unsigned long *)((char *)hdr + gMemHdrSize + size);
+      if (*trl != gMemDeadVal) {
+	fprintf(stderr, "Overwrite past end of block %d at address %p\n",
+		hdr->index, p);
+      }
+      for (clr = (unsigned long *)hdr; clr <= trl; ++clr)
+	*clr = gMemDeadVal;
+      free(hdr);
+    } else {
+      fprintf(stderr, "Attempted to free bad address %p\n", p);
+    }
+  }
+#else
+  if (p)
+    free(p);
+#endif
+}
+
+#ifdef DEBUG_MEM
+void gMemReport(FILE *f) {
+  GMemHdr *p;
+  int lst;
+
+  fprintf(f, "%d memory allocations in all\n", gMemIndex);
+  if (gMemAlloc > 0) {
+    fprintf(f, "%d memory blocks left allocated:\n", gMemAlloc);
+    fprintf(f, " index     size\n");
+    fprintf(f, "-------- --------\n");
+    for (lst = 0; lst < gMemNLists; ++lst) {
+      for (p = gMemList[lst]; p; p = p->next)
+	fprintf(f, "%8d %8d\n", p->index, p->size);
+    }
+  } else {
+    fprintf(f, "No memory blocks left allocated\n");
+  }
+}
+#endif
+
+char *copyString(char *s) {
+  char *s1;
+
+  s1 = (char *)gmalloc(strlen(s) + 1);
+  strcpy(s1, s);
+  return s1;
+}