diff --git a/c/bitvector-ops.c b/c/bitvector-ops.c
index 5f50315..8365851 100644
--- a/c/bitvector-ops.c
+++ b/c/bitvector-ops.c
@@ -1,21 +1,21 @@
-#include <stdlib.h>
 #include <assert.h>
+#include <stdlib.h>
 #include <string.h>
 
-#include "dtypes.h"
-#include "bitvector.h"
-
 #ifdef WIN32
 #include <malloc.h>
 #define alloca _alloca
 #endif
 
+#include "dtypes.h"
+#include "bitvector.h"
+
 // greater than this # of words we use malloc instead of alloca
 #define MALLOC_CUTOFF 2000
 
-u_int32_t bitreverse(u_int32_t x)
+uint32_t bitreverse(uint32_t x)
 {
-    u_int32_t m;
+    uint32_t m;
 
 #ifdef __INTEL_COMPILER
     x = _bswap(x);
@@ -38,9 +38,9 @@ u_int32_t bitreverse(u_int32_t x)
 // n is # of int32s to consider, s is shift distance
 // lowest bit-index is bit 0 of word 0
 // TODO: handle boundary case of shift distance >= data size?
-void bitvector_shr(u_int32_t *b, size_t n, u_int32_t s)
+void bitvector_shr(uint32_t *b, size_t n, uint32_t s)
 {
-    u_int32_t i;
+    uint32_t i;
     if (s == 0 || n == 0)
         return;
     i = (s >> 5);
@@ -60,9 +60,9 @@ void bitvector_shr(u_int32_t *b, size_t n, u_int32_t s)
 // linear representation when a copy is needed
 // assumes that dest has the same amount of space as source, even if it
 // wouldn't have been necessary to hold the shifted bits
-void bitvector_shr_to(u_int32_t *dest, u_int32_t *b, size_t n, u_int32_t s)
+void bitvector_shr_to(uint32_t *dest, uint32_t *b, size_t n, uint32_t s)
 {
-    u_int32_t i, j;
+    uint32_t i, j;
     if (n == 0)
         return;
     if (s == 0) {
@@ -82,9 +82,9 @@ void bitvector_shr_to(u_int32_t *dest, u_int32_t *b, size_t n, u_int32_t s)
     dest[i] = b[i] >> s;
 }
 
-void bitvector_shl(u_int32_t *b, size_t n, u_int32_t s)
+void bitvector_shl(uint32_t *b, size_t n, uint32_t s)
 {
-    u_int32_t i, scrap = 0, temp;
+    uint32_t i, scrap = 0, temp;
     if (s == 0 || n == 0)
         return;
     i = (s >> 5);
@@ -104,10 +104,10 @@ void bitvector_shl(u_int32_t *b, size_t n, u_int32_t s)
 
 // if dest has more space than source, set scrap to true to keep the
 // top bits that would otherwise be shifted out
-void bitvector_shl_to(u_int32_t *dest, u_int32_t *b, size_t n, u_int32_t s,
+void bitvector_shl_to(uint32_t *dest, uint32_t *b, size_t n, uint32_t s,
                       bool_t scrap)
 {
-    u_int32_t i, j, sc = 0;
+    uint32_t i, j, sc = 0;
     if (n == 0)
         return;
     if (s == 0) {
@@ -131,12 +131,11 @@ void bitvector_shl_to(u_int32_t *dest, u_int32_t *b, size_t n, u_int32_t s,
 
 // set nbits to c, starting at given bit offset
 // assumes offs < 32
-void bitvector_fill(u_int32_t *b, u_int32_t offs, u_int32_t c,
-                    u_int32_t nbits)
+void bitvector_fill(uint32_t *b, uint32_t offs, uint32_t c, uint32_t nbits)
 {
     index_t i;
-    u_int32_t nw, tail;
-    u_int32_t mask;
+    uint32_t nw, tail;
+    uint32_t mask;
 
     if (nbits == 0)
         return;
@@ -176,11 +175,11 @@ void bitvector_fill(u_int32_t *b, u_int32_t offs, u_int32_t c,
     }
 }
 
-void bitvector_not(u_int32_t *b, u_int32_t offs, u_int32_t nbits)
+void bitvector_not(uint32_t *b, uint32_t offs, uint32_t nbits)
 {
     index_t i;
-    u_int32_t nw, tail;
-    u_int32_t mask;
+    uint32_t nw, tail;
+    uint32_t mask;
 
     if (nbits == 0)
         return;
@@ -210,12 +209,12 @@ void bitvector_not(u_int32_t *b, u_int32_t offs, u_int32_t nbits)
 // constant-space bit vector copy in a single pass, with arbitrary
 // offsets and lengths. to get this right, there are 16 cases to handle!
 #define BITVECTOR_COPY_OP(name, OP)                                          \
-    void bitvector_##name(u_int32_t *dest, u_int32_t doffs, u_int32_t *src,  \
-                          u_int32_t soffs, u_int32_t nbits)                  \
+    void bitvector_##name(uint32_t *dest, uint32_t doffs, uint32_t *src,     \
+                          uint32_t soffs, uint32_t nbits)                    \
     {                                                                        \
         index_t i;                                                           \
-        u_int32_t s, nw, tail, snw;                                          \
-        u_int32_t mask, scrap;                                               \
+        uint32_t s, nw, tail, snw;                                           \
+        uint32_t mask, scrap;                                                \
                                                                              \
         if (nbits == 0)                                                      \
             return;                                                          \
@@ -319,7 +318,7 @@ BITVECTOR_COPY_OP(not_to, BV_NOT)
 
 // right-shift the bits in one logical "row" of a long 2d bit vector
 /*
-void bitvector_shr_row(u_int32_t *b, u_int32_t offs, size_t nbits, u_int32_t
+void bitvector_shr_row(uint32_t *b, uint32_t offs, size_t nbits, uint32_t
 s)
 {
 }
@@ -329,11 +328,11 @@ s)
 // assumes dest offset == 0
 // assumes source and dest don't overlap
 // assumes offset < 32
-void bitvector_reverse_to(u_int32_t *dest, u_int32_t *src, u_int32_t soffs,
-                          u_int32_t nbits)
+void bitvector_reverse_to(uint32_t *dest, uint32_t *src, uint32_t soffs,
+                          uint32_t nbits)
 {
     index_t i;
-    u_int32_t nw, tail;
+    uint32_t nw, tail;
 
     if (nbits == 0)
         return;
@@ -352,11 +351,11 @@ void bitvector_reverse_to(u_int32_t *dest, u_int32_t *src, u_int32_t soffs,
         bitvector_shr(dest, nw, 32 - tail);
 }
 
-void bitvector_reverse(u_int32_t *b, u_int32_t offs, u_int32_t nbits)
+void bitvector_reverse(uint32_t *b, uint32_t offs, uint32_t nbits)
 {
     index_t i;
-    u_int32_t nw, tail;
-    u_int32_t *temp;
+    uint32_t nw, tail;
+    uint32_t *temp;
 
     if (nbits == 0)
         return;
@@ -376,15 +375,15 @@ void bitvector_reverse(u_int32_t *b, u_int32_t offs, u_int32_t nbits)
         free(temp);
 }
 
-u_int64_t bitvector_count(u_int32_t *b, u_int32_t offs, u_int64_t nbits)
+uint64_t bitvector_count(uint32_t *b, uint32_t offs, uint64_t nbits)
 {
     size_t i, nw;
-    u_int32_t ntail;
-    u_int64_t ans;
+    uint32_t ntail;
+    uint64_t ans;
 
     if (nbits == 0)
         return 0;
-    nw = ((u_int64_t)offs + nbits + 31) >> 5;
+    nw = ((uint64_t)offs + nbits + 31) >> 5;
 
     if (nw == 1) {
         return count_bits(b[0] & (lomask(nbits) << offs));
@@ -406,18 +405,18 @@ u_int64_t bitvector_count(u_int32_t *b, u_int32_t offs, u_int64_t nbits)
         ans += count_bits(b[i]);
     }
 
-    ntail = (offs + (u_int32_t)nbits) & 31;
+    ntail = (offs + (uint32_t)nbits) & 31;
     ans +=
     count_bits(b[i] & (ntail > 0 ? lomask(ntail) : ONES32));  // last end cap
 
     return ans;
 }
 
-u_int32_t bitvector_any0(u_int32_t *b, u_int32_t offs, u_int32_t nbits)
+uint32_t bitvector_any0(uint32_t *b, uint32_t offs, uint32_t nbits)
 {
     index_t i;
-    u_int32_t nw, tail;
-    u_int32_t mask;
+    uint32_t nw, tail;
+    uint32_t mask;
 
     if (nbits == 0)
         return 0;
@@ -451,11 +450,11 @@ u_int32_t bitvector_any0(u_int32_t *b, u_int32_t offs, u_int32_t nbits)
     return 0;
 }
 
-u_int32_t bitvector_any1(u_int32_t *b, u_int32_t offs, u_int32_t nbits)
+uint32_t bitvector_any1(uint32_t *b, uint32_t offs, uint32_t nbits)
 {
     index_t i;
-    u_int32_t nw, tail;
-    u_int32_t mask;
+    uint32_t nw, tail;
+    uint32_t mask;
 
     if (nbits == 0)
         return 0;
@@ -489,8 +488,8 @@ u_int32_t bitvector_any1(u_int32_t *b, u_int32_t offs, u_int32_t nbits)
     return 0;
 }
 
-static void adjust_offset_to(u_int32_t *dest, u_int32_t *src, u_int32_t nw,
-                             u_int32_t soffs, u_int32_t newoffs)
+static void adjust_offset_to(uint32_t *dest, uint32_t *src, uint32_t nw,
+                             uint32_t soffs, uint32_t newoffs)
 {
     if (newoffs > soffs)
         bitvector_shl_to(dest, src, nw, newoffs - soffs, 1);
@@ -498,35 +497,35 @@ static void adjust_offset_to(u_int32_t *dest, u_int32_t *src, u_int32_t nw,
         bitvector_shr_to(dest, src, nw, soffs - newoffs);
 }
 
-#define BITVECTOR_BINARY_OP_TO(opname, OP)                                \
-    void bitvector_##opname##_to(                                         \
-    u_int32_t *dest, u_int32_t doffs, u_int32_t *a, u_int32_t aoffs,      \
-    u_int32_t *b, u_int32_t boffs, u_int32_t nbits)                       \
-    {                                                                     \
-        u_int32_t nw = (doffs + nbits + 31) >> 5;                         \
-        u_int32_t *temp =                                                 \
-        nw > MALLOC_CUTOFF ? malloc((nw + 1) * 4) : alloca((nw + 1) * 4); \
-        u_int32_t i, anw, bnw;                                            \
-        if (aoffs == boffs) {                                             \
-            anw = (aoffs + nbits + 31) >> 5;                              \
-        } else if (aoffs == doffs) {                                      \
-            bnw = (boffs + nbits + 31) >> 5;                              \
-            adjust_offset_to(temp, b, bnw, boffs, aoffs);                 \
-            b = temp;                                                     \
-            anw = nw;                                                     \
-        } else {                                                          \
-            anw = (aoffs + nbits + 31) >> 5;                              \
-            bnw = (boffs + nbits + 31) >> 5;                              \
-            adjust_offset_to(temp, a, anw, aoffs, boffs);                 \
-            a = temp;                                                     \
-            aoffs = boffs;                                                \
-            anw = bnw;                                                    \
-        }                                                                 \
-        for (i = 0; i < anw; i++)                                         \
-            temp[i] = OP(a[i], b[i]);                                     \
-        bitvector_copy(dest, doffs, temp, aoffs, nbits);                  \
-        if (nw > MALLOC_CUTOFF)                                           \
-            free(temp);                                                   \
+#define BITVECTOR_BINARY_OP_TO(opname, OP)                                 \
+    void bitvector_##opname##_to(uint32_t *dest, uint32_t doffs,           \
+                                 uint32_t *a, uint32_t aoffs, uint32_t *b, \
+                                 uint32_t boffs, uint32_t nbits)           \
+    {                                                                      \
+        uint32_t nw = (doffs + nbits + 31) >> 5;                           \
+        uint32_t *temp =                                                   \
+        nw > MALLOC_CUTOFF ? malloc((nw + 1) * 4) : alloca((nw + 1) * 4);  \
+        uint32_t i, anw, bnw;                                              \
+        if (aoffs == boffs) {                                              \
+            anw = (aoffs + nbits + 31) >> 5;                               \
+        } else if (aoffs == doffs) {                                       \
+            bnw = (boffs + nbits + 31) >> 5;                               \
+            adjust_offset_to(temp, b, bnw, boffs, aoffs);                  \
+            b = temp;                                                      \
+            anw = nw;                                                      \
+        } else {                                                           \
+            anw = (aoffs + nbits + 31) >> 5;                               \
+            bnw = (boffs + nbits + 31) >> 5;                               \
+            adjust_offset_to(temp, a, anw, aoffs, boffs);                  \
+            a = temp;                                                      \
+            aoffs = boffs;                                                 \
+            anw = bnw;                                                     \
+        }                                                                  \
+        for (i = 0; i < anw; i++)                                          \
+            temp[i] = OP(a[i], b[i]);                                      \
+        bitvector_copy(dest, doffs, temp, aoffs, nbits);                   \
+        if (nw > MALLOC_CUTOFF)                                            \
+            free(temp);                                                    \
     }
 
 #define BV_AND(a, b) ((a) & (b))
diff --git a/c/bitvector.c b/c/bitvector.c
index 46f9177..3d5b91c 100644
--- a/c/bitvector.c
+++ b/c/bitvector.c
@@ -29,8 +29,8 @@
   and_to, or_to, and xor_to allow overlap.
 */
 
-#include <stdlib.h>
 #include <assert.h>
+#include <stdlib.h>
 #include <string.h>
 
 #include "dtypes.h"
@@ -40,10 +40,10 @@
 #include <malloc.h>
 #endif
 
-u_int32_t *bitvector_resize(u_int32_t *b, uint64_t oldsz, uint64_t newsz,
-                            int initzero)
+uint32_t *bitvector_resize(uint32_t *b, uint64_t oldsz, uint64_t newsz,
+                           int initzero)
 {
-    u_int32_t *p;
+    uint32_t *p;
     size_t sz = ((newsz + 31) >> 5) * sizeof(uint32_t);
     p = LLT_REALLOC(b, sz);
     if (p == NULL)
@@ -55,14 +55,14 @@ u_int32_t *bitvector_resize(u_int32_t *b, uint64_t oldsz, uint64_t newsz,
     return p;
 }
 
-u_int32_t *bitvector_new(u_int64_t n, int initzero)
+uint32_t *bitvector_new(uint64_t n, int initzero)
 {
     return bitvector_resize(NULL, 0, n, initzero);
 }
 
-size_t bitvector_nwords(u_int64_t nbits) { return ((nbits + 31) >> 5); }
+size_t bitvector_nwords(uint64_t nbits) { return ((nbits + 31) >> 5); }
 
-void bitvector_set(u_int32_t *b, u_int64_t n, u_int32_t c)
+void bitvector_set(uint32_t *b, uint64_t n, uint32_t c)
 {
     if (c)
         b[n >> 5] |= (1 << (n & 31));
@@ -70,7 +70,7 @@ void bitvector_set(u_int32_t *b, u_int64_t n, u_int32_t c)
         b[n >> 5] &= ~(1 << (n & 31));
 }
 
-u_int32_t bitvector_get(u_int32_t *b, u_int64_t n)
+uint32_t bitvector_get(uint32_t *b, uint64_t n)
 {
     return b[n >> 5] & (1 << (n & 31));
 }
diff --git a/c/bitvector.h b/c/bitvector.h
index f711d00..627d87b 100644
--- a/c/bitvector.h
+++ b/c/bitvector.h
@@ -1,12 +1,12 @@
 // a mask with n set lo or hi bits
-#define lomask(n) (u_int32_t)((((u_int32_t)1) << (n)) - 1)
+#define lomask(n) (uint32_t)((((uint32_t)1) << (n)) - 1)
 #define himask(n) (~lomask(32 - n))
-#define ONES32 ((u_int32_t)0xffffffff)
+#define ONES32 ((uint32_t)0xffffffff)
 
 #ifdef __INTEL_COMPILER
 #define count_bits(b) _popcnt32(b)
 #else
-static inline u_int32_t count_bits(u_int32_t b)
+static inline uint32_t count_bits(uint32_t b)
 {
     b = b - ((b >> 1) & 0x55555555);
     b = ((b >> 2) & 0x33333333) + (b & 0x33333333);
@@ -26,41 +26,40 @@ static inline u_int32_t count_bits(u_int32_t b)
 }
 #endif
 
-u_int32_t bitreverse(u_int32_t x);
+uint32_t bitreverse(uint32_t x);
 
-u_int32_t *bitvector_new(u_int64_t n, int initzero);
-u_int32_t *bitvector_resize(u_int32_t *b, uint64_t oldsz, uint64_t newsz,
-                            int initzero);
-size_t bitvector_nwords(u_int64_t nbits);
-void bitvector_set(u_int32_t *b, u_int64_t n, u_int32_t c);
-u_int32_t bitvector_get(u_int32_t *b, u_int64_t n);
+uint32_t *bitvector_new(uint64_t n, int initzero);
+uint32_t *bitvector_resize(uint32_t *b, uint64_t oldsz, uint64_t newsz,
+                           int initzero);
+size_t bitvector_nwords(uint64_t nbits);
+void bitvector_set(uint32_t *b, uint64_t n, uint32_t c);
+uint32_t bitvector_get(uint32_t *b, uint64_t n);
 
 uint32_t bitvector_next(uint32_t *b, uint64_t n0, uint64_t n);
 
-void bitvector_shr(u_int32_t *b, size_t n, u_int32_t s);
-void bitvector_shr_to(u_int32_t *dest, u_int32_t *b, size_t n, u_int32_t s);
-void bitvector_shl(u_int32_t *b, size_t n, u_int32_t s);
-void bitvector_shl_to(u_int32_t *dest, u_int32_t *b, size_t n, u_int32_t s,
+void bitvector_shr(uint32_t *b, size_t n, uint32_t s);
+void bitvector_shr_to(uint32_t *dest, uint32_t *b, size_t n, uint32_t s);
+void bitvector_shl(uint32_t *b, size_t n, uint32_t s);
+void bitvector_shl_to(uint32_t *dest, uint32_t *b, size_t n, uint32_t s,
                       bool_t scrap);
-void bitvector_fill(u_int32_t *b, u_int32_t offs, u_int32_t c,
-                    u_int32_t nbits);
-void bitvector_copy(u_int32_t *dest, u_int32_t doffs, u_int32_t *a,
-                    u_int32_t aoffs, u_int32_t nbits);
-void bitvector_not(u_int32_t *b, u_int32_t offs, u_int32_t nbits);
-void bitvector_not_to(u_int32_t *dest, u_int32_t doffs, u_int32_t *a,
-                      u_int32_t aoffs, u_int32_t nbits);
-void bitvector_reverse(u_int32_t *b, u_int32_t offs, u_int32_t nbits);
-void bitvector_reverse_to(u_int32_t *dest, u_int32_t *src, u_int32_t soffs,
-                          u_int32_t nbits);
-void bitvector_and_to(u_int32_t *dest, u_int32_t doffs, u_int32_t *a,
-                      u_int32_t aoffs, u_int32_t *b, u_int32_t boffs,
-                      u_int32_t nbits);
-void bitvector_or_to(u_int32_t *dest, u_int32_t doffs, u_int32_t *a,
-                     u_int32_t aoffs, u_int32_t *b, u_int32_t boffs,
-                     u_int32_t nbits);
-void bitvector_xor_to(u_int32_t *dest, u_int32_t doffs, u_int32_t *a,
-                      u_int32_t aoffs, u_int32_t *b, u_int32_t boffs,
-                      u_int32_t nbits);
-u_int64_t bitvector_count(u_int32_t *b, u_int32_t offs, u_int64_t nbits);
-u_int32_t bitvector_any0(u_int32_t *b, u_int32_t offs, u_int32_t nbits);
-u_int32_t bitvector_any1(u_int32_t *b, u_int32_t offs, u_int32_t nbits);
+void bitvector_fill(uint32_t *b, uint32_t offs, uint32_t c, uint32_t nbits);
+void bitvector_copy(uint32_t *dest, uint32_t doffs, uint32_t *a,
+                    uint32_t aoffs, uint32_t nbits);
+void bitvector_not(uint32_t *b, uint32_t offs, uint32_t nbits);
+void bitvector_not_to(uint32_t *dest, uint32_t doffs, uint32_t *a,
+                      uint32_t aoffs, uint32_t nbits);
+void bitvector_reverse(uint32_t *b, uint32_t offs, uint32_t nbits);
+void bitvector_reverse_to(uint32_t *dest, uint32_t *src, uint32_t soffs,
+                          uint32_t nbits);
+void bitvector_and_to(uint32_t *dest, uint32_t doffs, uint32_t *a,
+                      uint32_t aoffs, uint32_t *b, uint32_t boffs,
+                      uint32_t nbits);
+void bitvector_or_to(uint32_t *dest, uint32_t doffs, uint32_t *a,
+                     uint32_t aoffs, uint32_t *b, uint32_t boffs,
+                     uint32_t nbits);
+void bitvector_xor_to(uint32_t *dest, uint32_t doffs, uint32_t *a,
+                      uint32_t aoffs, uint32_t *b, uint32_t boffs,
+                      uint32_t nbits);
+uint64_t bitvector_count(uint32_t *b, uint32_t offs, uint64_t nbits);
+uint32_t bitvector_any0(uint32_t *b, uint32_t offs, uint32_t nbits);
+uint32_t bitvector_any1(uint32_t *b, uint32_t offs, uint32_t nbits);
diff --git a/c/builtins.c b/c/builtins.c
index 8748b1d..045a2e9 100644
--- a/c/builtins.c
+++ b/c/builtins.c
@@ -43,7 +43,7 @@ size_t llength(value_t v)
     return n;
 }
 
-static value_t fl_nconc(value_t *args, u_int32_t nargs)
+static value_t fl_nconc(value_t *args, uint32_t nargs)
 {
     if (nargs == 0)
         return FL_NIL;
@@ -69,7 +69,7 @@ static value_t fl_nconc(value_t *args, u_int32_t nargs)
     return first;
 }
 
-static value_t fl_assq(value_t *args, u_int32_t nargs)
+static value_t fl_assq(value_t *args, uint32_t nargs)
 {
     argcount("assq", nargs, 2);
     value_t item = args[0];
@@ -85,7 +85,7 @@ static value_t fl_assq(value_t *args, u_int32_t nargs)
     return FL_F;
 }
 
-static value_t fl_memq(value_t *args, u_int32_t nargs)
+static value_t fl_memq(value_t *args, uint32_t nargs)
 {
     argcount("memq", nargs, 2);
     while (iscons(args[1])) {
@@ -97,7 +97,7 @@ static value_t fl_memq(value_t *args, u_int32_t nargs)
     return FL_F;
 }
 
-static value_t fl_length(value_t *args, u_int32_t nargs)
+static value_t fl_length(value_t *args, uint32_t nargs)
 {
     argcount("length", nargs, 1);
     value_t a = args[0];
@@ -123,13 +123,13 @@ static value_t fl_length(value_t *args, u_int32_t nargs)
     type_error("length", "sequence", a);
 }
 
-static value_t fl_f_raise(value_t *args, u_int32_t nargs)
+static value_t fl_f_raise(value_t *args, uint32_t nargs)
 {
     argcount("raise", nargs, 1);
     fl_raise(args[0]);
 }
 
-static value_t fl_exit(value_t *args, u_int32_t nargs)
+static value_t fl_exit(value_t *args, uint32_t nargs)
 {
     if (nargs > 0)
         exit(tofixnum(args[0], "exit"));
@@ -137,7 +137,7 @@ static value_t fl_exit(value_t *args, u_int32_t nargs)
     return FL_NIL;
 }
 
-static value_t fl_symbol(value_t *args, u_int32_t nargs)
+static value_t fl_symbol(value_t *args, uint32_t nargs)
 {
     argcount("symbol", nargs, 1);
     if (!fl_isstring(args[0]))
@@ -145,7 +145,7 @@ static value_t fl_symbol(value_t *args, u_int32_t nargs)
     return symbol(cvalue_data(args[0]));
 }
 
-static value_t fl_keywordp(value_t *args, u_int32_t nargs)
+static value_t fl_keywordp(value_t *args, uint32_t nargs)
 {
     argcount("keyword?", nargs, 1);
     return (issymbol(args[0]) && iskeyword((struct symbol *)ptr(args[0])))
@@ -153,7 +153,7 @@ static value_t fl_keywordp(value_t *args, u_int32_t nargs)
            : FL_F;
 }
 
-static value_t fl_top_level_value(value_t *args, u_int32_t nargs)
+static value_t fl_top_level_value(value_t *args, uint32_t nargs)
 {
     argcount("top-level-value", nargs, 1);
     struct symbol *sym = tosymbol(args[0], "top-level-value");
@@ -162,7 +162,7 @@ static value_t fl_top_level_value(value_t *args, u_int32_t nargs)
     return sym->binding;
 }
 
-static value_t fl_set_top_level_value(value_t *args, u_int32_t nargs)
+static value_t fl_set_top_level_value(value_t *args, uint32_t nargs)
 {
     argcount("set-top-level-value!", nargs, 2);
     struct symbol *sym = tosymbol(args[0], "set-top-level-value!");
@@ -184,7 +184,7 @@ static void global_env_list(struct symbol *root, value_t *pv)
 
 extern struct symbol *symtab;
 
-value_t fl_global_env(value_t *args, u_int32_t nargs)
+value_t fl_global_env(value_t *args, uint32_t nargs)
 {
     (void)args;
     argcount("environment", nargs, 0);
@@ -197,7 +197,7 @@ value_t fl_global_env(value_t *args, u_int32_t nargs)
 
 extern value_t QUOTE;
 
-static value_t fl_constantp(value_t *args, u_int32_t nargs)
+static value_t fl_constantp(value_t *args, uint32_t nargs)
 {
     argcount("constant?", nargs, 1);
     if (issymbol(args[0]))
@@ -210,7 +210,7 @@ static value_t fl_constantp(value_t *args, u_int32_t nargs)
     return FL_T;
 }
 
-static value_t fl_integer_valuedp(value_t *args, u_int32_t nargs)
+static value_t fl_integer_valuedp(value_t *args, uint32_t nargs)
 {
     argcount("integer-valued?", nargs, 1);
     value_t v = args[0];
@@ -239,7 +239,7 @@ static value_t fl_integer_valuedp(value_t *args, u_int32_t nargs)
     return FL_F;
 }
 
-static value_t fl_integerp(value_t *args, u_int32_t nargs)
+static value_t fl_integerp(value_t *args, uint32_t nargs)
 {
     argcount("integer?", nargs, 1);
     value_t v = args[0];
@@ -249,7 +249,7 @@ static value_t fl_integerp(value_t *args, u_int32_t nargs)
            : FL_F;
 }
 
-static value_t fl_fixnum(value_t *args, u_int32_t nargs)
+static value_t fl_fixnum(value_t *args, uint32_t nargs)
 {
     argcount("fixnum", nargs, 1);
     if (isfixnum(args[0])) {
@@ -261,7 +261,7 @@ static value_t fl_fixnum(value_t *args, u_int32_t nargs)
     type_error("fixnum", "number", args[0]);
 }
 
-static value_t fl_truncate(value_t *args, u_int32_t nargs)
+static value_t fl_truncate(value_t *args, uint32_t nargs)
 {
     argcount("truncate", nargs, 1);
     if (isfixnum(args[0]))
@@ -289,7 +289,7 @@ static value_t fl_truncate(value_t *args, u_int32_t nargs)
     type_error("truncate", "number", args[0]);
 }
 
-static value_t fl_vector_alloc(value_t *args, u_int32_t nargs)
+static value_t fl_vector_alloc(value_t *args, uint32_t nargs)
 {
     fixnum_t i;
     value_t f, v;
@@ -309,7 +309,7 @@ static value_t fl_vector_alloc(value_t *args, u_int32_t nargs)
     return v;
 }
 
-static value_t fl_time_now(value_t *args, u_int32_t nargs)
+static value_t fl_time_now(value_t *args, uint32_t nargs)
 {
     argcount("time.now", nargs, 0);
     (void)args;
@@ -409,7 +409,7 @@ static value_t fl_os_setenv(value_t *args, uint32_t nargs)
     return FL_T;
 }
 
-static value_t fl_rand(value_t *args, u_int32_t nargs)
+static value_t fl_rand(value_t *args, uint32_t nargs)
 {
     (void)args;
     (void)nargs;
@@ -421,7 +421,7 @@ static value_t fl_rand(value_t *args, u_int32_t nargs)
 #endif
     return fixnum(r);
 }
-static value_t fl_rand32(value_t *args, u_int32_t nargs)
+static value_t fl_rand32(value_t *args, uint32_t nargs)
 {
     (void)args;
     (void)nargs;
@@ -432,20 +432,20 @@ static value_t fl_rand32(value_t *args, u_int32_t nargs)
     return mk_uint32(r);
 #endif
 }
-static value_t fl_rand64(value_t *args, u_int32_t nargs)
+static value_t fl_rand64(value_t *args, uint32_t nargs)
 {
     (void)args;
     (void)nargs;
     uint64_t r = (((uint64_t)random()) << 32) | random();
     return mk_uint64(r);
 }
-static value_t fl_randd(value_t *args, u_int32_t nargs)
+static value_t fl_randd(value_t *args, uint32_t nargs)
 {
     (void)args;
     (void)nargs;
     return mk_double(rand_double());
 }
-static value_t fl_randf(value_t *args, u_int32_t nargs)
+static value_t fl_randf(value_t *args, uint32_t nargs)
 {
     (void)args;
     (void)nargs;
@@ -453,7 +453,7 @@ static value_t fl_randf(value_t *args, u_int32_t nargs)
 }
 
 #define MATH_FUNC_1ARG(name)                                     \
-    static value_t fl_##name(value_t *args, u_int32_t nargs)     \
+    static value_t fl_##name(value_t *args, uint32_t nargs)      \
     {                                                            \
         argcount(#name, nargs, 1);                               \
         if (iscprim(args[0])) {                                  \
diff --git a/c/cvalues.h b/c/cvalues.h
index 064b976..49efc37 100644
--- a/c/cvalues.h
+++ b/c/cvalues.h
@@ -31,9 +31,9 @@ struct fltype *builtintype;
 static void cvalue_init(struct fltype *type, value_t v, void *dest);
 
 // cvalues-specific builtins
-value_t cvalue_new(value_t *args, u_int32_t nargs);
-value_t cvalue_sizeof(value_t *args, u_int32_t nargs);
-value_t cvalue_typeof(value_t *args, u_int32_t nargs);
+value_t cvalue_new(value_t *args, uint32_t nargs);
+value_t cvalue_sizeof(value_t *args, uint32_t nargs);
+value_t cvalue_typeof(value_t *args, uint32_t nargs);
 
 // trigger unconditional GC after this many bytes are allocated
 #define ALLOC_LIMIT_TRIGGER 67108864
@@ -241,18 +241,18 @@ void cv_pin(struct cvalue *cv)
     static int cvalue_##ctype##_init(struct fltype *type, value_t arg, \
                                      void *dest)                       \
     {                                                                  \
-        fl_##ctype##_t n = 0;                                          \
+        ctype##_t n = 0;                                               \
         (void)type;                                                    \
         if (isfixnum(arg)) {                                           \
             n = numval(arg);                                           \
         } else if (iscprim(arg)) {                                     \
             struct cprim *cp = (struct cprim *)ptr(arg);               \
             void *p = cp_data(cp);                                     \
-            n = (fl_##ctype##_t)conv_to_##cnvt(p, cp_numtype(cp));     \
+            n = (ctype##_t)conv_to_##cnvt(p, cp_numtype(cp));          \
         } else {                                                       \
             return 1;                                                  \
         }                                                              \
-        *((fl_##ctype##_t *)dest) = n;                                 \
+        *((ctype##_t *)dest) = n;                                      \
         return 0;                                                      \
     }
 num_init(int8, int32, T_INT8) num_init(uint8, uint32, T_UINT8)
@@ -262,25 +262,25 @@ num_init(int64, int64, T_INT64) num_init(uint64, uint64, T_UINT64)
 num_init(float, double, T_FLOAT) num_init(double, double, T_DOUBLE)
 
 #define num_ctor_init(typenam, ctype, tag)                           \
-    value_t cvalue_##typenam(value_t *args, u_int32_t nargs)         \
+    value_t cvalue_##typenam(value_t *args, uint32_t nargs)          \
     {                                                                \
         if (nargs == 0) {                                            \
             PUSH(fixnum(0));                                         \
             args = &Stack[SP - 1];                                   \
         }                                                            \
-        value_t cp = cprim(typenam##type, sizeof(fl_##ctype##_t));   \
+        value_t cp = cprim(typenam##type, sizeof(ctype##_t));        \
         if (cvalue_##ctype##_init(typenam##type, args[0],            \
                                   cp_data((struct cprim *)ptr(cp)))) \
             type_error(#typenam, "number", args[0]);                 \
         return cp;                                                   \
     }
 
-#define num_ctor_ctor(typenam, ctype, tag)                         \
-    value_t mk_##typenam(fl_##ctype##_t n)                         \
-    {                                                              \
-        value_t cp = cprim(typenam##type, sizeof(fl_##ctype##_t)); \
-        *(fl_##ctype##_t *)cp_data((struct cprim *)ptr(cp)) = n;   \
-        return cp;                                                 \
+#define num_ctor_ctor(typenam, ctype, tag)                    \
+    value_t mk_##typenam(ctype##_t n)                         \
+    {                                                         \
+        value_t cp = cprim(typenam##type, sizeof(ctype##_t)); \
+        *(ctype##_t *)cp_data((struct cprim *)ptr(cp)) = n;   \
+        return cp;                                            \
     }
 
 #define num_ctor(typenam, ctype, tag) \
@@ -350,7 +350,7 @@ static int cvalue_enum_init(struct fltype *ft, value_t arg, void *dest)
     return 0;
 }
 
-value_t cvalue_enum(value_t *args, u_int32_t nargs)
+value_t cvalue_enum(value_t *args, uint32_t nargs)
 {
     argcount("enum", nargs, 2);
     value_t type = fl_list2(enumsym, args[0]);
@@ -440,7 +440,7 @@ static int cvalue_array_init(struct fltype *ft, value_t arg, void *dest)
     return 0;
 }
 
-value_t cvalue_array(value_t *args, u_int32_t nargs)
+value_t cvalue_array(value_t *args, uint32_t nargs)
 {
     size_t elsize, cnt, sz, i;
     value_t arg;
@@ -595,7 +595,7 @@ void to_sized_ptr(value_t v, char *fname, char **pdata, size_t *psz)
     type_error(fname, "plain-old-data", v);
 }
 
-value_t cvalue_sizeof(value_t *args, u_int32_t nargs)
+value_t cvalue_sizeof(value_t *args, uint32_t nargs)
 {
     argcount("sizeof", nargs, 1);
     if (issymbol(args[0]) || iscons(args[0])) {
@@ -608,7 +608,7 @@ value_t cvalue_sizeof(value_t *args, u_int32_t nargs)
     return size_wrap(n);
 }
 
-value_t cvalue_typeof(value_t *args, u_int32_t nargs)
+value_t cvalue_typeof(value_t *args, uint32_t nargs)
 {
     argcount("typeof", nargs, 1);
     switch (tag(args[0])) {
@@ -684,7 +684,7 @@ value_t cvalue_copy(value_t v)
     return tagptr(ncv, TAG_CVALUE);
 }
 
-value_t fl_copy(value_t *args, u_int32_t nargs)
+value_t fl_copy(value_t *args, uint32_t nargs)
 {
     argcount("copy", nargs, 1);
     if (iscons(args[0]) || isvector(args[0]))
@@ -696,7 +696,7 @@ value_t fl_copy(value_t *args, u_int32_t nargs)
     return cvalue_copy(args[0]);
 }
 
-value_t fl_podp(value_t *args, u_int32_t nargs)
+value_t fl_podp(value_t *args, uint32_t nargs)
 {
     argcount("plain-old-data?", nargs, 1);
     return (iscprim(args[0]) ||
@@ -760,7 +760,7 @@ static numerictype_t sym_to_numtype(value_t type)
 // this provides (1) a way to allocate values with a shared type for
 // efficiency, (2) a uniform interface for allocating cvalues of any
 // type, including user-defined.
-value_t cvalue_new(value_t *args, u_int32_t nargs)
+value_t cvalue_new(value_t *args, uint32_t nargs)
 {
     if (nargs < 1 || nargs > 2)
         argcount("c-value", nargs, 2);
@@ -810,7 +810,7 @@ value_t cvalue_compare(value_t a, value_t b)
 }
 
 static void check_addr_args(char *fname, value_t arr, value_t ind,
-                            char **data, ulong_t *index)
+                            char **data, unsigned long *index)
 {
     size_t numel;
     struct cvalue *cv = (struct cvalue *)ptr(arr);
@@ -824,7 +824,7 @@ static void check_addr_args(char *fname, value_t arr, value_t ind,
 static value_t cvalue_array_aref(value_t *args)
 {
     char *data;
-    ulong_t index;
+    unsigned long index;
     struct fltype *eltype = cv_class((struct cvalue *)ptr(args[0]))->eltype;
     value_t el = 0;
     numerictype_t nt = eltype->numtype;
@@ -858,7 +858,7 @@ static value_t cvalue_array_aref(value_t *args)
 static value_t cvalue_array_aset(value_t *args)
 {
     char *data;
-    ulong_t index;
+    unsigned long index;
     struct fltype *eltype = cv_class((struct cvalue *)ptr(args[0]))->eltype;
     check_addr_args("aset!", args[0], args[1], &data, &index);
     char *dest = data + index * eltype->size;
@@ -866,7 +866,7 @@ static value_t cvalue_array_aset(value_t *args)
     return args[2];
 }
 
-value_t fl_builtin(value_t *args, u_int32_t nargs)
+value_t fl_builtin(value_t *args, uint32_t nargs)
 {
     argcount("builtin", nargs, 1);
     struct symbol *name = tosymbol(args[0], "builtin");
@@ -893,11 +893,11 @@ value_t cbuiltin(char *name, builtin_t f)
     return tagptr(cv, TAG_CVALUE);
 }
 
-static value_t fl_logand(value_t *args, u_int32_t nargs);
-static value_t fl_logior(value_t *args, u_int32_t nargs);
-static value_t fl_logxor(value_t *args, u_int32_t nargs);
-static value_t fl_lognot(value_t *args, u_int32_t nargs);
-static value_t fl_ash(value_t *args, u_int32_t nargs);
+static value_t fl_logand(value_t *args, uint32_t nargs);
+static value_t fl_logior(value_t *args, uint32_t nargs);
+static value_t fl_logxor(value_t *args, uint32_t nargs);
+static value_t fl_lognot(value_t *args, uint32_t nargs);
+static value_t fl_ash(value_t *args, uint32_t nargs);
 
 static struct builtinspec cvalues_builtin_info[] = {
     { "c-value", cvalue_new },
@@ -1017,7 +1017,7 @@ static void cvalues_init(void)
     setc(emptystringsym, cvalue_static_cstring(""));
 }
 
-#define RETURN_NUM_AS(var, type) return (mk_##type((fl_##type##_t)var))
+#define RETURN_NUM_AS(var, type) return (mk_##type((type##_t)var))
 
 value_t return_from_uint64(uint64_t Uaccum)
 {
@@ -1047,7 +1047,7 @@ value_t return_from_int64(int64_t Saccum)
     RETURN_NUM_AS(Saccum, int32);
 }
 
-static value_t fl_add_any(value_t *args, u_int32_t nargs, fixnum_t carryIn)
+static value_t fl_add_any(value_t *args, uint32_t nargs, fixnum_t carryIn)
 {
     uint64_t Uaccum = 0;
     int64_t Saccum = carryIn;
@@ -1185,7 +1185,7 @@ static value_t fl_neg(value_t n)
     type_error("-", "number", n);
 }
 
-static value_t fl_mul_any(value_t *args, u_int32_t nargs, int64_t Saccum)
+static value_t fl_mul_any(value_t *args, uint32_t nargs, int64_t Saccum)
 {
     uint64_t Uaccum = 1;
     double Faccum = 1;
@@ -1501,7 +1501,7 @@ static value_t fl_bitwise_op(value_t a, value_t b, int opcode, char *fname)
     return NIL;
 }
 
-static value_t fl_logand(value_t *args, u_int32_t nargs)
+static value_t fl_logand(value_t *args, uint32_t nargs)
 {
     value_t v, e;
     int i;
@@ -1518,7 +1518,7 @@ static value_t fl_logand(value_t *args, u_int32_t nargs)
     return v;
 }
 
-static value_t fl_logior(value_t *args, u_int32_t nargs)
+static value_t fl_logior(value_t *args, uint32_t nargs)
 {
     value_t v, e;
     int i;
@@ -1535,7 +1535,7 @@ static value_t fl_logior(value_t *args, u_int32_t nargs)
     return v;
 }
 
-static value_t fl_logxor(value_t *args, u_int32_t nargs)
+static value_t fl_logxor(value_t *args, uint32_t nargs)
 {
     value_t v, e;
     int i;
@@ -1552,7 +1552,7 @@ static value_t fl_logxor(value_t *args, u_int32_t nargs)
     return v;
 }
 
-static value_t fl_lognot(value_t *args, u_int32_t nargs)
+static value_t fl_lognot(value_t *args, uint32_t nargs)
 {
     argcount("lognot", nargs, 1);
     value_t a = args[0];
@@ -1588,7 +1588,7 @@ static value_t fl_lognot(value_t *args, u_int32_t nargs)
     type_error("lognot", "integer", a);
 }
 
-static value_t fl_ash(value_t *args, u_int32_t nargs)
+static value_t fl_ash(value_t *args, uint32_t nargs)
 {
     fixnum_t n;
     int64_t accum;
diff --git a/c/dtypes.h b/c/dtypes.h
index 9e94d39..0835f18 100644
--- a/c/dtypes.h
+++ b/c/dtypes.h
@@ -96,62 +96,35 @@ typedef int bool_t;
 #if defined(__INTEL_COMPILER) && defined(WIN32)
 #define STATIC_INLINE static
 #define INLINE
-#ifdef BITS64
-typedef unsigned long size_t;
-#else
-typedef unsigned int size_t;
-#endif
 #else
 #define STATIC_INLINE static inline
 #define INLINE inline
 #endif
 
-typedef unsigned char byte_t; /* 1 byte */
-#if defined(WIN32)
-typedef short int16_t;
-typedef int int32_t;
-typedef long long int64_t;
-typedef unsigned char u_int8_t;
-typedef unsigned short u_int16_t;
-typedef unsigned int u_int32_t;
-#ifdef BITS64
-typedef unsigned long u_int64_t;
-#else
-typedef unsigned long long u_int64_t;
-#endif
-#ifdef __INTEL_COMPILER
-typedef signed char int8_t;
-typedef short int16_t;
-typedef int int32_t;
-#endif
-#else
-#include <sys/types.h>
-#endif
-
 #ifdef BITS64
 #define TOP_BIT 0x8000000000000000
 #define NBITS 64
 typedef unsigned long uint_t;  // preferred int type on platform
 typedef long int_t;
 typedef int64_t offset_t;
-typedef u_int64_t index_t;
+typedef uint64_t index_t;
 typedef int64_t ptrint_t;  // pointer-size int
-typedef u_int64_t u_ptrint_t;
+typedef uint64_t u_ptrint_t;
 #else
 #define TOP_BIT 0x80000000
 #define NBITS 32
 typedef unsigned long uint_t;
 typedef long int_t;
 typedef int32_t offset_t;
-typedef u_int32_t index_t;
+typedef uint32_t index_t;
 typedef int32_t ptrint_t;
-typedef u_int32_t u_ptrint_t;
+typedef uint32_t u_ptrint_t;
 #endif
 
-typedef u_int8_t uint8_t;
-typedef u_int16_t uint16_t;
-typedef u_int32_t uint32_t;
-typedef u_int64_t uint64_t;
+typedef uint8_t uint8_t;
+typedef uint16_t uint16_t;
+typedef uint32_t uint32_t;
+typedef uint64_t uint64_t;
 typedef u_ptrint_t uptrint_t;
 
 #define LLT_ALIGN(x, sz) (((x) + (sz - 1)) & (-sz))
diff --git a/c/dump.c b/c/dump.c
index c4b150c..0ed229f 100644
--- a/c/dump.c
+++ b/c/dump.c
@@ -1,3 +1,5 @@
+#include <sys/types.h>
+
 #include <stdarg.h>
 #include <stdlib.h>
 
diff --git a/c/equal.h b/c/equal.h
index 09583d1..e440127 100644
--- a/c/equal.h
+++ b/c/equal.h
@@ -395,7 +395,7 @@ uptrint_t hash_lispvalue(value_t a)
     return n;
 }
 
-value_t fl_hash(value_t *args, u_int32_t nargs)
+value_t fl_hash(value_t *args, uint32_t nargs)
 {
     argcount("hash", nargs, 1);
     return fixnum(hash_lispvalue(args[0]));
diff --git a/c/flisp.c b/c/flisp.c
index 93b5ff6..21cd954 100644
--- a/c/flisp.c
+++ b/c/flisp.c
@@ -333,7 +333,7 @@ value_t fl_gensym(value_t *args, uint32_t nargs)
 
 int fl_isgensym(value_t v) { return isgensym(v); }
 
-static value_t fl_gensymp(value_t *args, u_int32_t nargs)
+static value_t fl_gensymp(value_t *args, uint32_t nargs)
 {
     argcount("gensym?", nargs, 1);
     return isgensym(args[0]) ? FL_T : FL_F;
@@ -2307,13 +2307,13 @@ static value_t fl_function_name(value_t *args, uint32_t nargs)
     return fn_name(v);
 }
 
-value_t fl_copylist(value_t *args, u_int32_t nargs)
+value_t fl_copylist(value_t *args, uint32_t nargs)
 {
     argcount("copy-list", nargs, 1);
     return copy_list(args[0]);
 }
 
-value_t fl_append(value_t *args, u_int32_t nargs)
+value_t fl_append(value_t *args, uint32_t nargs)
 {
     if (nargs == 0)
         return NIL;
@@ -2344,7 +2344,7 @@ value_t fl_append(value_t *args, u_int32_t nargs)
     return first;
 }
 
-value_t fl_liststar(value_t *args, u_int32_t nargs)
+value_t fl_liststar(value_t *args, uint32_t nargs)
 {
     if (nargs == 1)
         return args[0];
@@ -2353,14 +2353,14 @@ value_t fl_liststar(value_t *args, u_int32_t nargs)
     return _list(args, nargs, 1);
 }
 
-value_t fl_stacktrace(value_t *args, u_int32_t nargs)
+value_t fl_stacktrace(value_t *args, uint32_t nargs)
 {
     (void)args;
     argcount("stacktrace", nargs, 0);
     return _stacktrace(fl_throwing_frame ? fl_throwing_frame : curr_frame);
 }
 
-value_t fl_map1(value_t *args, u_int32_t nargs)
+value_t fl_map1(value_t *args, uint32_t nargs)
 {
     if (nargs < 2)
         lerror(ArgError, "map: too few arguments");
diff --git a/c/flisp.h b/c/flisp.h
index 1f3e374..8b418dd 100644
--- a/c/flisp.h
+++ b/c/flisp.h
@@ -313,24 +313,6 @@ struct function {
     (iscprim(v) ? cp_data((struct cprim *)ptr(v)) \
                 : cv_data((struct cvalue *)ptr(v)))
 
-/* C type names corresponding to cvalues type names */
-typedef int8_t fl_int8_t;
-typedef uint8_t fl_uint8_t;
-typedef int16_t fl_int16_t;
-typedef uint16_t fl_uint16_t;
-typedef int32_t fl_int32_t;
-typedef uint32_t fl_uint32_t;
-typedef int64_t fl_int64_t;
-typedef uint64_t fl_uint64_t;
-typedef char fl_char_t;
-typedef char char_t;
-typedef long fl_long_t;
-typedef long long_t;
-typedef unsigned long fl_ulong_t;
-typedef unsigned long ulong_t;
-typedef double fl_double_t;
-typedef float fl_float_t;
-
 typedef value_t (*builtin_t)(value_t *, uint32_t);
 
 extern value_t QUOTE;
@@ -377,8 +359,8 @@ struct fltype *get_array_type(value_t eltype);
 struct fltype *define_opaque_type(value_t sym, size_t sz,
                                   struct cvtable *vtab, cvinitfunc_t init);
 
-value_t mk_double(fl_double_t n);
-value_t mk_float(fl_float_t n);
+value_t mk_double(double n);
+value_t mk_float(float n);
 value_t mk_uint32(uint32_t n);
 value_t mk_uint64(uint64_t n);
 value_t mk_wchar(int32_t n);
@@ -408,7 +390,7 @@ struct builtinspec {
 void assign_global_builtins(struct builtinspec *b);
 
 /* builtins */
-value_t fl_hash(value_t *args, u_int32_t nargs);
+value_t fl_hash(value_t *args, uint32_t nargs);
 value_t cvalue_byte(value_t *args, uint32_t nargs);
 value_t cvalue_wchar(value_t *args, uint32_t nargs);
 
diff --git a/c/hashing.c b/c/hashing.c
index c67545c..42a1ba1 100644
--- a/c/hashing.c
+++ b/c/hashing.c
@@ -43,7 +43,7 @@ uint_t nextipow2(uint_t i)
     return i << 1;
 }
 
-u_int32_t int32hash(u_int32_t a)
+uint32_t int32hash(uint32_t a)
 {
     a = (a + 0x7ed55d16) + (a << 12);
     a = (a ^ 0xc761c23c) ^ (a >> 19);
@@ -54,7 +54,7 @@ u_int32_t int32hash(u_int32_t a)
     return a;
 }
 
-u_int64_t int64hash(u_int64_t key)
+uint64_t int64hash(uint64_t key)
 {
     key = (~key) + (key << 21);  // key = (key << 21) - key - 1;
     key = key ^ (key >> 24);
@@ -66,7 +66,7 @@ u_int64_t int64hash(u_int64_t key)
     return key;
 }
 
-u_int32_t int64to32hash(u_int64_t key)
+uint32_t int64to32hash(uint64_t key)
 {
     key = (~key) + (key << 18);  // key = (key << 18) - key - 1;
     key = key ^ (key >> 31);
@@ -74,22 +74,22 @@ u_int32_t int64to32hash(u_int64_t key)
     key = key ^ (key >> 11);
     key = key + (key << 6);
     key = key ^ (key >> 22);
-    return (u_int32_t)key;
+    return (uint32_t)key;
 }
 
 #include "lookup3.h"
 
-u_int64_t memhash(const char *buf, size_t n)
+uint64_t memhash(const char *buf, size_t n)
 {
-    u_int32_t c = 0xcafe8881, b = 0x4d6a087c;
+    uint32_t c = 0xcafe8881, b = 0x4d6a087c;
 
     hashlittle2(buf, n, &c, &b);
-    return (u_int64_t)c | (((u_int64_t)b) << 32);
+    return (uint64_t)c | (((uint64_t)b) << 32);
 }
 
-u_int32_t memhash32(const char *buf, size_t n)
+uint32_t memhash32(const char *buf, size_t n)
 {
-    u_int32_t c = 0xcafe8881, b = 0x4d6a087c;
+    uint32_t c = 0xcafe8881, b = 0x4d6a087c;
 
     hashlittle2(buf, n, &c, &b);
     return c;
diff --git a/c/hashing.h b/c/hashing.h
index 6764641..ced1e07 100644
--- a/c/hashing.h
+++ b/c/hashing.h
@@ -1,11 +1,11 @@
 uint_t nextipow2(uint_t i);
-u_int32_t int32hash(u_int32_t a);
-u_int64_t int64hash(u_int64_t key);
-u_int32_t int64to32hash(u_int64_t key);
+uint32_t int32hash(uint32_t a);
+uint64_t int64hash(uint64_t key);
+uint32_t int64to32hash(uint64_t key);
 #ifdef BITS64
 #define inthash int64hash
 #else
 #define inthash int32hash
 #endif
-u_int64_t memhash(const char *buf, size_t n);
-u_int32_t memhash32(const char *buf, size_t n);
+uint64_t memhash(const char *buf, size_t n);
+uint32_t memhash32(const char *buf, size_t n);
diff --git a/c/iostream.c b/c/iostream.c
index 78cf4f9..6a47718 100644
--- a/c/iostream.c
+++ b/c/iostream.c
@@ -119,7 +119,7 @@ value_t fl_file(value_t *args, uint32_t nargs)
     return f;
 }
 
-value_t fl_buffer(value_t *args, u_int32_t nargs)
+value_t fl_buffer(value_t *args, uint32_t nargs)
 {
     argcount("buffer", nargs, 0);
     (void)args;
@@ -130,7 +130,7 @@ value_t fl_buffer(value_t *args, u_int32_t nargs)
     return f;
 }
 
-value_t fl_read(value_t *args, u_int32_t nargs)
+value_t fl_read(value_t *args, uint32_t nargs)
 {
     value_t arg = 0;
     if (nargs > 1) {
@@ -149,7 +149,7 @@ value_t fl_read(value_t *args, u_int32_t nargs)
     return v;
 }
 
-value_t fl_iogetc(value_t *args, u_int32_t nargs)
+value_t fl_iogetc(value_t *args, uint32_t nargs)
 {
     argcount("io.getc", nargs, 1);
     struct ios *s = toiostream(args[0], "io.getc");
@@ -160,7 +160,7 @@ value_t fl_iogetc(value_t *args, u_int32_t nargs)
     return mk_wchar(wc);
 }
 
-value_t fl_iopeekc(value_t *args, u_int32_t nargs)
+value_t fl_iopeekc(value_t *args, uint32_t nargs)
 {
     argcount("io.peekc", nargs, 1);
     struct ios *s = toiostream(args[0], "io.peekc");
@@ -170,7 +170,7 @@ value_t fl_iopeekc(value_t *args, u_int32_t nargs)
     return mk_wchar(wc);
 }
 
-value_t fl_ioputc(value_t *args, u_int32_t nargs)
+value_t fl_ioputc(value_t *args, uint32_t nargs)
 {
     argcount("io.putc", nargs, 2);
     struct ios *s = toiostream(args[0], "io.putc");
@@ -181,7 +181,7 @@ value_t fl_ioputc(value_t *args, u_int32_t nargs)
     return fixnum(ios_pututf8(s, wc));
 }
 
-value_t fl_ioungetc(value_t *args, u_int32_t nargs)
+value_t fl_ioungetc(value_t *args, uint32_t nargs)
 {
     argcount("io.ungetc", nargs, 2);
     struct ios *s = toiostream(args[0], "io.ungetc");
@@ -195,7 +195,7 @@ value_t fl_ioungetc(value_t *args, u_int32_t nargs)
     return fixnum(ios_ungetc((int)wc, s));
 }
 
-value_t fl_ioflush(value_t *args, u_int32_t nargs)
+value_t fl_ioflush(value_t *args, uint32_t nargs)
 {
     argcount("io.flush", nargs, 1);
     struct ios *s = toiostream(args[0], "io.flush");
@@ -204,7 +204,7 @@ value_t fl_ioflush(value_t *args, u_int32_t nargs)
     return FL_T;
 }
 
-value_t fl_ioclose(value_t *args, u_int32_t nargs)
+value_t fl_ioclose(value_t *args, uint32_t nargs)
 {
     argcount("io.close", nargs, 1);
     struct ios *s = toiostream(args[0], "io.close");
@@ -212,7 +212,7 @@ value_t fl_ioclose(value_t *args, u_int32_t nargs)
     return FL_T;
 }
 
-value_t fl_iopurge(value_t *args, u_int32_t nargs)
+value_t fl_iopurge(value_t *args, uint32_t nargs)
 {
     argcount("io.discardbuffer", nargs, 1);
     struct ios *s = toiostream(args[0], "io.discardbuffer");
@@ -220,14 +220,14 @@ value_t fl_iopurge(value_t *args, u_int32_t nargs)
     return FL_T;
 }
 
-value_t fl_ioeof(value_t *args, u_int32_t nargs)
+value_t fl_ioeof(value_t *args, uint32_t nargs)
 {
     argcount("io.eof?", nargs, 1);
     struct ios *s = toiostream(args[0], "io.eof?");
     return (ios_eof(s) ? FL_T : FL_F);
 }
 
-value_t fl_ioseek(value_t *args, u_int32_t nargs)
+value_t fl_ioseek(value_t *args, uint32_t nargs)
 {
     argcount("io.seek", nargs, 2);
     struct ios *s = toiostream(args[0], "io.seek");
@@ -238,7 +238,7 @@ value_t fl_ioseek(value_t *args, u_int32_t nargs)
     return FL_T;
 }
 
-value_t fl_iopos(value_t *args, u_int32_t nargs)
+value_t fl_iopos(value_t *args, uint32_t nargs)
 {
     argcount("io.pos", nargs, 1);
     struct ios *s = toiostream(args[0], "io.pos");
@@ -248,7 +248,7 @@ value_t fl_iopos(value_t *args, u_int32_t nargs)
     return size_wrap((size_t)res);
 }
 
-value_t fl_write(value_t *args, u_int32_t nargs)
+value_t fl_write(value_t *args, uint32_t nargs)
 {
     if (nargs < 1 || nargs > 2)
         argcount("write", nargs, 1);
@@ -261,7 +261,7 @@ value_t fl_write(value_t *args, u_int32_t nargs)
     return args[0];
 }
 
-value_t fl_ioread(value_t *args, u_int32_t nargs)
+value_t fl_ioread(value_t *args, uint32_t nargs)
 {
     if (nargs != 3)
         argcount("io.read", nargs, 2);
@@ -306,7 +306,7 @@ static void get_start_count_args(value_t *args, uint32_t nargs, size_t sz,
     }
 }
 
-value_t fl_iowrite(value_t *args, u_int32_t nargs)
+value_t fl_iowrite(value_t *args, uint32_t nargs)
 {
     if (nargs < 2 || nargs > 4)
         argcount("io.write", nargs, 2);
@@ -330,7 +330,7 @@ value_t fl_iowrite(value_t *args, u_int32_t nargs)
     return size_wrap(ios_write(s, data, nb));
 }
 
-value_t fl_dump(value_t *args, u_int32_t nargs)
+value_t fl_dump(value_t *args, uint32_t nargs)
 {
     if (nargs < 1 || nargs > 3)
         argcount("dump", nargs, 1);
@@ -360,7 +360,7 @@ static char get_delim_arg(value_t arg, char *fname)
     return (char)uldelim;
 }
 
-value_t fl_ioreaduntil(value_t *args, u_int32_t nargs)
+value_t fl_ioreaduntil(value_t *args, uint32_t nargs)
 {
     argcount("io.readuntil", nargs, 2);
     value_t str = cvalue_string(80);
@@ -384,7 +384,7 @@ value_t fl_ioreaduntil(value_t *args, u_int32_t nargs)
     return str;
 }
 
-value_t fl_iocopyuntil(value_t *args, u_int32_t nargs)
+value_t fl_iocopyuntil(value_t *args, uint32_t nargs)
 {
     argcount("io.copyuntil", nargs, 3);
     struct ios *dest = toiostream(args[0], "io.copyuntil");
@@ -393,7 +393,7 @@ value_t fl_iocopyuntil(value_t *args, u_int32_t nargs)
     return size_wrap(ios_copyuntil(dest, src, delim));
 }
 
-value_t fl_iocopy(value_t *args, u_int32_t nargs)
+value_t fl_iocopy(value_t *args, uint32_t nargs)
 {
     if (nargs < 2 || nargs > 3)
         argcount("io.copy", nargs, 2);
@@ -426,7 +426,7 @@ value_t stream_to_string(value_t *ps)
     return str;
 }
 
-value_t fl_iotostring(value_t *args, u_int32_t nargs)
+value_t fl_iotostring(value_t *args, uint32_t nargs)
 {
     argcount("io.tostring!", nargs, 1);
     struct ios *src = toiostream(args[0], "io.tostring!");
diff --git a/c/print.h b/c/print.h
index eec3d14..a7e97b4 100644
--- a/c/print.h
+++ b/c/print.h
@@ -1,7 +1,7 @@
 extern void *memrchr(const void *s, int c, size_t n);
 
 static struct htable printconses;
-static u_int32_t printlabel;
+static uint32_t printlabel;
 static int print_pretty;
 static int print_princ;
 static fixnum_t print_length;
diff --git a/c/ptrhash.c b/c/ptrhash.c
index 86d3d5d..6c6e570 100644
--- a/c/ptrhash.c
+++ b/c/ptrhash.c
@@ -16,7 +16,7 @@
 #define OP_EQ(x, y) ((x) == (y))
 
 #ifdef BITS64
-static u_int64_t _pinthash(u_int64_t key)
+static uint64_t _pinthash(uint64_t key)
 {
     key = (~key) + (key << 21);  // key = (key << 21) - key - 1;
     key = key ^ (key >> 24);
@@ -28,7 +28,7 @@ static u_int64_t _pinthash(u_int64_t key)
     return key;
 }
 #else
-static u_int32_t _pinthash(u_int32_t a)
+static uint32_t _pinthash(uint32_t a)
 {
     a = (a + 0x7ed55d16) + (a << 12);
     a = (a ^ 0xc761c23c) ^ (a >> 19);
diff --git a/c/random.c b/c/random.c
index ac6d344..00faa55 100644
--- a/c/random.c
+++ b/c/random.c
@@ -59,6 +59,6 @@ double randn()
 
 void randomize()
 {
-    u_int64_t tm = i64time();
+    uint64_t tm = i64time();
     init_by_array((uint32_t *)&tm, 2);
 }
diff --git a/c/random.h b/c/random.h
index da1bffb..383fa67 100644
--- a/c/random.h
+++ b/c/random.h
@@ -6,4 +6,4 @@ double randn();
 void randomize();
 uint32_t genrand_int32();
 void init_genrand(uint32_t s);
-u_int64_t i64time();
+uint64_t i64time();
diff --git a/c/read.h b/c/read.h
index 746c250..1d1f896 100644
--- a/c/read.h
+++ b/c/read.h
@@ -113,7 +113,7 @@ static int read_numtok(char *tok, value_t *pval, int base)
     return result;
 }
 
-static u_int32_t toktype = TOK_NONE;
+static uint32_t toktype = TOK_NONE;
 static value_t tokval;
 static char buf[256];
 
@@ -190,7 +190,7 @@ terminate:
 
 static value_t do_read_sexpr(value_t label);
 
-static u_int32_t peek(void)
+static uint32_t peek(void)
 {
     char c, *end;
     fixnum_t x;
@@ -405,10 +405,10 @@ static value_t vector_grow(value_t v)
     return POP();
 }
 
-static value_t read_vector(value_t label, u_int32_t closer)
+static value_t read_vector(value_t label, uint32_t closer)
 {
     value_t v = the_empty_vector, elt;
-    u_int32_t i = 0;
+    uint32_t i = 0;
     PUSH(v);
     if (label != UNBOUND)
         ptrhash_put(&readstate->backrefs, (void *)label, (void *)v);
@@ -439,7 +439,7 @@ static value_t read_string(void)
     size_t i = 0, j, sz = 64, ndig;
     int c;
     value_t s;
-    u_int32_t wc = 0;
+    uint32_t wc = 0;
 
     buf = malloc(sz);
     while (1) {
@@ -516,7 +516,7 @@ static value_t read_string(void)
 static void read_list(value_t *pval, value_t label)
 {
     value_t c, *pc;
-    u_int32_t t;
+    uint32_t t;
 
     PUSH(NIL);
     pc = &Stack[SP - 1];  // to keep track of current cons cell
@@ -560,7 +560,7 @@ static value_t do_read_sexpr(value_t label)
 {
     value_t v, sym, oldtokval, *head;
     value_t *pv;
-    u_int32_t t;
+    uint32_t t;
     char c;
 
     t = peek();
diff --git a/c/string.c b/c/string.c
index 48cdb36..9552ce4 100644
--- a/c/string.c
+++ b/c/string.c
@@ -32,13 +32,13 @@
 
 #include "flisp.h"
 
-value_t fl_stringp(value_t *args, u_int32_t nargs)
+value_t fl_stringp(value_t *args, uint32_t nargs)
 {
     argcount("string?", nargs, 1);
     return fl_isstring(args[0]) ? FL_T : FL_F;
 }
 
-value_t fl_string_count(value_t *args, u_int32_t nargs)
+value_t fl_string_count(value_t *args, uint32_t nargs)
 {
     size_t start = 0;
     if (nargs < 1 || nargs > 3)
@@ -63,7 +63,7 @@ value_t fl_string_count(value_t *args, u_int32_t nargs)
     return size_wrap(u8_charnum(str + start, stop - start));
 }
 
-value_t fl_string_width(value_t *args, u_int32_t nargs)
+value_t fl_string_width(value_t *args, uint32_t nargs)
 {
     argcount("string.width", nargs, 1);
     if (iscprim(args[0])) {
@@ -79,7 +79,7 @@ value_t fl_string_width(value_t *args, u_int32_t nargs)
     return size_wrap(u8_strwidth(s));
 }
 
-value_t fl_string_reverse(value_t *args, u_int32_t nargs)
+value_t fl_string_reverse(value_t *args, uint32_t nargs)
 {
     argcount("string.reverse", nargs, 1);
     if (!fl_isstring(args[0]))
@@ -90,7 +90,7 @@ value_t fl_string_reverse(value_t *args, u_int32_t nargs)
     return ns;
 }
 
-value_t fl_string_encode(value_t *args, u_int32_t nargs)
+value_t fl_string_encode(value_t *args, uint32_t nargs)
 {
     argcount("string.encode", nargs, 1);
     if (iscvalue(args[0])) {
@@ -110,7 +110,7 @@ value_t fl_string_encode(value_t *args, u_int32_t nargs)
     type_error("string.encode", "wchar array", args[0]);
 }
 
-value_t fl_string_decode(value_t *args, u_int32_t nargs)
+value_t fl_string_decode(value_t *args, uint32_t nargs)
 {
     int term = 0;
     if (nargs == 2) {
@@ -136,10 +136,10 @@ value_t fl_string_decode(value_t *args, u_int32_t nargs)
     return wcstr;
 }
 
-extern value_t fl_buffer(value_t *args, u_int32_t nargs);
+extern value_t fl_buffer(value_t *args, uint32_t nargs);
 extern value_t stream_to_string(value_t *ps);
 
-value_t fl_string(value_t *args, u_int32_t nargs)
+value_t fl_string(value_t *args, uint32_t nargs)
 {
     if (nargs == 1 && fl_isstring(args[0]))
         return args[0];
@@ -159,7 +159,7 @@ value_t fl_string(value_t *args, u_int32_t nargs)
     return outp;
 }
 
-value_t fl_string_split(value_t *args, u_int32_t nargs)
+value_t fl_string_split(value_t *args, uint32_t nargs)
 {
     argcount("string.split", nargs, 2);
     char *s = tostring(args[0], "string.split");
@@ -203,7 +203,7 @@ value_t fl_string_split(value_t *args, u_int32_t nargs)
     return first;
 }
 
-value_t fl_string_sub(value_t *args, u_int32_t nargs)
+value_t fl_string_sub(value_t *args, uint32_t nargs)
 {
     if (nargs != 2)
         argcount("string.sub", nargs, 3);
@@ -227,7 +227,7 @@ value_t fl_string_sub(value_t *args, u_int32_t nargs)
     return ns;
 }
 
-value_t fl_string_char(value_t *args, u_int32_t nargs)
+value_t fl_string_char(value_t *args, uint32_t nargs)
 {
     argcount("string.char", nargs, 2);
     char *s = tostring(args[0], "string.char");
@@ -241,7 +241,7 @@ value_t fl_string_char(value_t *args, u_int32_t nargs)
     return mk_wchar(u8_nextchar(s, &i));
 }
 
-value_t fl_char_upcase(value_t *args, u_int32_t nargs)
+value_t fl_char_upcase(value_t *args, uint32_t nargs)
 {
     argcount("char.upcase", nargs, 1);
     struct cprim *cp = (struct cprim *)ptr(args[0]);
@@ -249,7 +249,7 @@ value_t fl_char_upcase(value_t *args, u_int32_t nargs)
         type_error("char.upcase", "wchar", args[0]);
     return mk_wchar(towupper(*(int32_t *)cp_data(cp)));
 }
-value_t fl_char_downcase(value_t *args, u_int32_t nargs)
+value_t fl_char_downcase(value_t *args, uint32_t nargs)
 {
     argcount("char.downcase", nargs, 1);
     struct cprim *cp = (struct cprim *)ptr(args[0]);
@@ -258,7 +258,7 @@ value_t fl_char_downcase(value_t *args, u_int32_t nargs)
     return mk_wchar(towlower(*(int32_t *)cp_data(cp)));
 }
 
-value_t fl_char_alpha(value_t *args, u_int32_t nargs)
+value_t fl_char_alpha(value_t *args, uint32_t nargs)
 {
     argcount("char-alphabetic?", nargs, 1);
     struct cprim *cp = (struct cprim *)ptr(args[0]);
@@ -275,7 +275,7 @@ static value_t mem_find_byte(char *s, char c, size_t start, size_t len)
     return size_wrap((size_t)(p - s));
 }
 
-value_t fl_string_find(value_t *args, u_int32_t nargs)
+value_t fl_string_find(value_t *args, uint32_t nargs)
 {
     char cbuf[8];
     size_t start = 0;
@@ -323,7 +323,7 @@ value_t fl_string_find(value_t *args, u_int32_t nargs)
     return FL_F;
 }
 
-value_t fl_string_inc(value_t *args, u_int32_t nargs)
+value_t fl_string_inc(value_t *args, uint32_t nargs)
 {
     if (nargs < 2 || nargs > 3)
         argcount("string.inc", nargs, 2);
@@ -341,7 +341,7 @@ value_t fl_string_inc(value_t *args, u_int32_t nargs)
     return size_wrap(i);
 }
 
-value_t fl_string_dec(value_t *args, u_int32_t nargs)
+value_t fl_string_dec(value_t *args, uint32_t nargs)
 {
     if (nargs < 2 || nargs > 3)
         argcount("string.dec", nargs, 2);
@@ -370,7 +370,7 @@ static unsigned long get_radix_arg(value_t arg, char *fname)
     return radix;
 }
 
-value_t fl_numbertostring(value_t *args, u_int32_t nargs)
+value_t fl_numbertostring(value_t *args, uint32_t nargs)
 {
     if (nargs < 1 || nargs > 2)
         argcount("number->string", nargs, 2);
@@ -412,7 +412,7 @@ value_t fl_stringtonumber(value_t *args, uint32_t nargs)
     return n;
 }
 
-value_t fl_string_isutf8(value_t *args, u_int32_t nargs)
+value_t fl_string_isutf8(value_t *args, uint32_t nargs)
 {
     argcount("string.isutf8", nargs, 1);
     char *s = tostring(args[0], "string.isutf8");
diff --git a/c/timefuncs.c b/c/timefuncs.c
index 9496c28..b3c204a 100644
--- a/c/timefuncs.c
+++ b/c/timefuncs.c
@@ -50,17 +50,17 @@ double diff_time(struct timeval *tv1, struct timeval *tv2)
 #endif
 
 // return as many bits of system randomness as we can get our hands on
-u_int64_t i64time()
+uint64_t i64time()
 {
-    u_int64_t a;
+    uint64_t a;
 #ifdef WIN32
     struct timeb tstruct;
     ftime(&tstruct);
-    a = (((u_int64_t)tstruct.time) << 32) + (u_int64_t)tstruct.millitm;
+    a = (((uint64_t)tstruct.time) << 32) + (uint64_t)tstruct.millitm;
 #else
     struct timeval now;
     gettimeofday(&now, NULL);
-    a = (((u_int64_t)now.tv_sec) << 32) + (u_int64_t)now.tv_usec;
+    a = (((uint64_t)now.tv_sec) << 32) + (uint64_t)now.tv_usec;
 #endif
 
     return a;
diff --git a/c/timefuncs.h b/c/timefuncs.h
index a166063..f33568b 100644
--- a/c/timefuncs.h
+++ b/c/timefuncs.h
@@ -1,4 +1,4 @@
-u_int64_t i64time();
+uint64_t i64time();
 double clock_now();
 void timestring(double seconds, char *buffer, size_t len);
 double parsetime(const char *str);
diff --git a/c/utf8.c b/c/utf8.c
index 56ad796..8d5bb25 100644
--- a/c/utf8.c
+++ b/c/utf8.c
@@ -36,9 +36,9 @@
 
 #include "utf8.h"
 
-static const u_int32_t offsetsFromUTF8[6] = { 0x00000000UL, 0x00003080UL,
-                                              0x000E2080UL, 0x03C82080UL,
-                                              0xFA082080UL, 0x82082080UL };
+static const uint32_t offsetsFromUTF8[6] = { 0x00000000UL, 0x00003080UL,
+                                             0x000E2080UL, 0x03C82080UL,
+                                             0xFA082080UL, 0x82082080UL };
 
 static const char trailingBytesForUTF8[256] = {
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
@@ -62,7 +62,7 @@ size_t u8_seqlen(const char *s)
 
 /* returns the # of bytes needed to encode a certain character
    0 means the character cannot (or should not) be encoded. */
-size_t u8_charlen(u_int32_t ch)
+size_t u8_charlen(uint32_t ch)
 {
     if (ch < 0x80)
         return 1;
@@ -75,7 +75,7 @@ size_t u8_charlen(u_int32_t ch)
     return 0;
 }
 
-size_t u8_codingsize(u_int32_t *wcstr, size_t n)
+size_t u8_codingsize(uint32_t *wcstr, size_t n)
 {
     size_t i, c = 0;
 
@@ -92,9 +92,9 @@ size_t u8_codingsize(u_int32_t *wcstr, size_t n)
    returns # characters converted
    if sz == srcsz+1 (i.e. 4*srcsz+4 bytes), there will always be enough space.
 */
-size_t u8_toucs(u_int32_t *dest, size_t sz, const char *src, size_t srcsz)
+size_t u8_toucs(uint32_t *dest, size_t sz, const char *src, size_t srcsz)
 {
-    u_int32_t ch;
+    uint32_t ch;
     const char *src_end = src + srcsz;
     size_t nb;
     size_t i = 0;
@@ -146,9 +146,9 @@ size_t u8_toucs(u_int32_t *dest, size_t sz, const char *src, size_t srcsz)
    returns # bytes stored in dest
    the destination string will never be bigger than the source string.
 */
-size_t u8_toutf8(char *dest, size_t sz, const u_int32_t *src, size_t srcsz)
+size_t u8_toutf8(char *dest, size_t sz, const uint32_t *src, size_t srcsz)
 {
-    u_int32_t ch;
+    uint32_t ch;
     size_t i = 0;
     char *dest0 = dest;
     char *dest_end = dest + sz;
@@ -183,7 +183,7 @@ size_t u8_toutf8(char *dest, size_t sz, const u_int32_t *src, size_t srcsz)
     return (dest - dest0);
 }
 
-size_t u8_wc_toutf8(char *dest, u_int32_t ch)
+size_t u8_wc_toutf8(char *dest, uint32_t ch)
 {
     if (ch < 0x80) {
         dest[0] = (char)ch;
@@ -263,7 +263,7 @@ size_t u8_strlen(const char *s)
 
 size_t u8_strwidth(const char *s)
 {
-    u_int32_t ch;
+    uint32_t ch;
     size_t nb, tot = 0;
     int w;
     signed char sc;
@@ -311,9 +311,9 @@ size_t u8_strwidth(const char *s)
 }
 
 /* reads the next utf-8 sequence out of a string, updating an index */
-u_int32_t u8_nextchar(const char *s, size_t *i)
+uint32_t u8_nextchar(const char *s, size_t *i)
 {
-    u_int32_t ch = 0;
+    uint32_t ch = 0;
     size_t sz = 0;
 
     do {
@@ -327,9 +327,9 @@ u_int32_t u8_nextchar(const char *s, size_t *i)
 }
 
 /* next character without NUL character terminator */
-u_int32_t u8_nextmemchar(const char *s, size_t *i)
+uint32_t u8_nextmemchar(const char *s, size_t *i)
 {
-    u_int32_t ch = 0;
+    uint32_t ch = 0;
     size_t sz = 0;
 
     do {
@@ -385,10 +385,10 @@ char read_escape_control_char(char c)
 
 /* assumes that src points to the character after a backslash
    returns number of input characters processed, 0 if error */
-size_t u8_read_escape_sequence(const char *str, size_t ssz, u_int32_t *dest)
+size_t u8_read_escape_sequence(const char *str, size_t ssz, uint32_t *dest)
 {
     assert(ssz > 0);
-    u_int32_t ch;
+    uint32_t ch;
     char digs[10];
     int dno = 0, ndig;
     size_t i = 1;
@@ -411,7 +411,7 @@ size_t u8_read_escape_sequence(const char *str, size_t ssz, u_int32_t *dest)
         digs[dno] = '\0';
         ch = strtol(digs, NULL, 16);
     } else {
-        ch = (u_int32_t)read_escape_control_char(c0);
+        ch = (uint32_t)read_escape_control_char(c0);
     }
     *dest = ch;
 
@@ -424,7 +424,7 @@ size_t u8_read_escape_sequence(const char *str, size_t ssz, u_int32_t *dest)
 size_t u8_unescape(char *buf, size_t sz, const char *src)
 {
     size_t c = 0, amt;
-    u_int32_t ch;
+    uint32_t ch;
     char temp[4];
 
     while (*src && c < sz) {
@@ -432,7 +432,7 @@ size_t u8_unescape(char *buf, size_t sz, const char *src)
             src++;
             amt = u8_read_escape_sequence(src, 1000, &ch);
         } else {
-            ch = (u_int32_t)*src;
+            ch = (uint32_t)*src;
             amt = 1;
         }
         src += amt;
@@ -455,7 +455,7 @@ static inline int buf_put2c(char *buf, const char *src)
     return 2;
 }
 
-int u8_escape_wchar(char *buf, size_t sz, u_int32_t ch)
+int u8_escape_wchar(char *buf, size_t sz, uint32_t ch)
 {
     assert(sz > 2);
     if (ch == L'\n')
@@ -479,7 +479,7 @@ int u8_escape_wchar(char *buf, size_t sz, u_int32_t ch)
     else if (ch < 32 || ch == 0x7f)
         return snprintf(buf, sz, "\\x%.2hhx", (unsigned char)ch);
     else if (ch > 0xFFFF)
-        return snprintf(buf, sz, "\\U%.8x", (u_int32_t)ch);
+        return snprintf(buf, sz, "\\U%.8x", (uint32_t)ch);
     else if (ch >= 0x80)
         return snprintf(buf, sz, "\\u%.4hx", (unsigned short)ch);
 
@@ -492,7 +492,7 @@ size_t u8_escape(char *buf, size_t sz, const char *src, size_t *pi,
                  size_t end, int escape_quotes, int ascii)
 {
     size_t i = *pi, i0;
-    u_int32_t ch;
+    uint32_t ch;
     char *start = buf;
     char *blim = start + sz - 11;
     assert(sz > 11);
@@ -523,10 +523,10 @@ size_t u8_escape(char *buf, size_t sz, const char *src, size_t *pi,
     return (buf - start);
 }
 
-char *u8_strchr(const char *s, u_int32_t ch, size_t *charn)
+char *u8_strchr(const char *s, uint32_t ch, size_t *charn)
 {
     size_t i = 0, lasti = 0;
-    u_int32_t c;
+    uint32_t c;
 
     *charn = 0;
     while (s[i]) {
@@ -541,10 +541,10 @@ char *u8_strchr(const char *s, u_int32_t ch, size_t *charn)
     return NULL;
 }
 
-char *u8_memchr(const char *s, u_int32_t ch, size_t sz, size_t *charn)
+char *u8_memchr(const char *s, uint32_t ch, size_t sz, size_t *charn)
 {
     size_t i = 0, lasti = 0;
-    u_int32_t c;
+    uint32_t c;
     int csz;
 
     *charn = 0;
@@ -566,10 +566,10 @@ char *u8_memchr(const char *s, u_int32_t ch, size_t sz, size_t *charn)
     return NULL;
 }
 
-char *u8_memrchr(const char *s, u_int32_t ch, size_t sz)
+char *u8_memrchr(const char *s, uint32_t ch, size_t sz)
 {
     size_t i = sz - 1, tempi = 0;
-    u_int32_t c;
+    uint32_t c;
 
     if (sz == 0)
         return NULL;
@@ -620,7 +620,7 @@ size_t u8_vprintf(const char *fmt, va_list ap)
 {
     size_t cnt, sz = 0, nc, needfree = 0;
     char *buf;
-    u_int32_t *wcs;
+    uint32_t *wcs;
 
     sz = 512;
     buf = (char *)alloca(sz);
@@ -632,7 +632,7 @@ size_t u8_vprintf(const char *fmt, va_list ap)
         needfree = 1;
         vsnprintf(buf, cnt + 1, fmt, ap);
     }
-    wcs = (u_int32_t *)alloca((cnt + 1) * sizeof(u_int32_t));
+    wcs = (uint32_t *)alloca((cnt + 1) * sizeof(uint32_t));
     nc = u8_toucs(wcs, cnt + 1, buf, cnt);
     wcs[nc] = 0;
     printf("%ls", (wchar_t *)wcs);
diff --git a/c/utf8.h b/c/utf8.h
index 3f8314a..c534e4e 100644
--- a/c/utf8.h
+++ b/c/utf8.h
@@ -7,16 +7,16 @@ extern int wcwidth(uint32_t);
 /* is c the start of a utf8 sequence? */
 #define isutf(c) (((c)&0xC0) != 0x80)
 
-#define UEOF ((u_int32_t)-1)
+#define UEOF ((uint32_t)-1)
 
 /* convert UTF-8 data to wide character */
-size_t u8_toucs(u_int32_t *dest, size_t sz, const char *src, size_t srcsz);
+size_t u8_toucs(uint32_t *dest, size_t sz, const char *src, size_t srcsz);
 
 /* the opposite conversion */
-size_t u8_toutf8(char *dest, size_t sz, const u_int32_t *src, size_t srcsz);
+size_t u8_toutf8(char *dest, size_t sz, const uint32_t *src, size_t srcsz);
 
 /* single character to UTF-8, returns # bytes written */
-size_t u8_wc_toutf8(char *dest, u_int32_t ch);
+size_t u8_wc_toutf8(char *dest, uint32_t ch);
 
 /* character number to byte offset */
 size_t u8_offset(const char *str, size_t charnum);
@@ -25,10 +25,10 @@ size_t u8_offset(const char *str, size_t charnum);
 size_t u8_charnum(const char *s, size_t offset);
 
 /* return next character, updating an index variable */
-u_int32_t u8_nextchar(const char *s, size_t *i);
+uint32_t u8_nextchar(const char *s, size_t *i);
 
 /* next character without NUL character terminator */
-u_int32_t u8_nextmemchar(const char *s, size_t *i);
+uint32_t u8_nextmemchar(const char *s, size_t *i);
 
 /* move to next character */
 void u8_inc(const char *s, size_t *i);
@@ -40,22 +40,22 @@ void u8_dec(const char *s, size_t *i);
 size_t u8_seqlen(const char *s);
 
 /* returns the # of bytes needed to encode a certain character */
-size_t u8_charlen(u_int32_t ch);
+size_t u8_charlen(uint32_t ch);
 
 /* computes the # of bytes needed to encode a WC string as UTF-8 */
-size_t u8_codingsize(u_int32_t *wcstr, size_t n);
+size_t u8_codingsize(uint32_t *wcstr, size_t n);
 
 char read_escape_control_char(char c);
 
 /* assuming src points to the character after a backslash, read an
    escape sequence, storing the result in dest and returning the number of
    input characters processed */
-size_t u8_read_escape_sequence(const char *src, size_t ssz, u_int32_t *dest);
+size_t u8_read_escape_sequence(const char *src, size_t ssz, uint32_t *dest);
 
 /* given a wide character, convert it to an ASCII escape sequence stored in
    buf, where buf is "sz" bytes. returns the number of characters output.
    sz must be at least 3. */
-int u8_escape_wchar(char *buf, size_t sz, u_int32_t ch);
+int u8_escape_wchar(char *buf, size_t sz, uint32_t ch);
 
 /* convert a string "src" containing escape sequences to UTF-8 */
 size_t u8_unescape(char *buf, size_t sz, const char *src);
@@ -84,13 +84,13 @@ int hex_digit(char c);
 
 /* return a pointer to the first occurrence of ch in s, or NULL if not
    found. character index of found character returned in *charn. */
-char *u8_strchr(const char *s, u_int32_t ch, size_t *charn);
+char *u8_strchr(const char *s, uint32_t ch, size_t *charn);
 
 /* same as the above, but searches a buffer of a given size instead of
    a NUL-terminated string. */
-char *u8_memchr(const char *s, u_int32_t ch, size_t sz, size_t *charn);
+char *u8_memchr(const char *s, uint32_t ch, size_t sz, size_t *charn);
 
-char *u8_memrchr(const char *s, u_int32_t ch, size_t sz);
+char *u8_memrchr(const char *s, uint32_t ch, size_t sz);
 
 /* count the number of characters in a UTF-8 string */
 size_t u8_strlen(const char *s);
diff --git a/c/utils.h b/c/utils.h
index 42e42ba..4a19b3c 100644
--- a/c/utils.h
+++ b/c/utils.h
@@ -34,14 +34,14 @@ int isdigit_base(char c, int base);
 #endif
 
 #if !defined(__INTEL_COMPILER) && (defined(ARCH_X86) || defined(ARCH_X86_64))
-STATIC_INLINE u_int16_t ByteSwap16(u_int16_t x)
+STATIC_INLINE uint16_t ByteSwap16(uint16_t x)
 {
     __asm("xchgb %b0,%h0" : LEGACY_REGS(x) : "0"(x));
     return x;
 }
 #define bswap_16(x) ByteSwap16(x)
 
-STATIC_INLINE u_int32_t ByteSwap32(u_int32_t x)
+STATIC_INLINE uint32_t ByteSwap32(uint32_t x)
 {
 #if __CPU__ > 386
     __asm("bswap        %0"
@@ -60,15 +60,15 @@ STATIC_INLINE u_int32_t ByteSwap32(u_int32_t x)
 
 #define bswap_32(x) ByteSwap32(x)
 
-STATIC_INLINE u_int64_t ByteSwap64(u_int64_t x)
+STATIC_INLINE uint64_t ByteSwap64(uint64_t x)
 {
 #ifdef ARCH_X86_64
     __asm("bswap        %0" : "=r"(x) : "0"(x));
     return x;
 #else
     register union {
-        __extension__ u_int64_t __ll;
-        u_int32_t __l[2];
+        __extension__ uint64_t __ll;
+        uint32_t __l[2];
     } __x;
     asm("xchgl  %0,%1"
         : "=r"(__x.__l[0]), "=r"(__x.__l[1])
@@ -91,11 +91,11 @@ STATIC_INLINE u_int64_t ByteSwap64(u_int64_t x)
      (((x)&0x0000ff00) << 8) | (((x)&0x000000ff) << 24))
 #endif
 
-STATIC_INLINE u_int64_t ByteSwap64(u_int64_t x)
+STATIC_INLINE uint64_t ByteSwap64(uint64_t x)
 {
     union {
-        u_int64_t ll;
-        u_int32_t l[2];
+        uint64_t ll;
+        uint32_t l[2];
     } w, r;
     w.ll = x;
     r.l[0] = bswap_32(w.l[1]);