1 files changed, 113 insertions, 0 deletions
diff --git a/buildtools/typegen.c b/buildtools/typegen.c
new file mode 100644
index 00000000..5b32af28
--- /dev/null
+++ b/buildtools/typegen.c
@@ -0,0 +1,113 @@
+/*----------------------------------------------------------------------------
+                                 typegen
+------------------------------------------------------------------------------
+  This is a program to create an inttypes.h file for use in building
+  Netpbm.  Ordinarily we use the inttypes.h that comes with the C library
+  or C compiler, specified by Single Unix Specification.  When that isn't
+  available there is usually some other system header file we should use.
+  But when there isn't any system header file to define the needed types,
+  the file we generate is better than nothing.
+
+  The main problem with the inttypes.h we generate is that when we
+  figure out which type is a 32 bit integer, we aren't necessarily using
+  the same compile environment as what will actually get used to build
+  Netpbm, and thus the one where our inttypes.h will be used.
+
+  Right now, it simply generates either 
+  
+    typedef int int32_t;
+
+  or
+
+    typedef long int32_t;
+
+  based on which type, int, or long, is 32 bits.
+
+  We also include the uint32_t and int_fast32_t typedefs.
+
+  We also include the multiple inclusion guard ifdef.
+-----------------------------------------------------------------------------*/
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+
+
+static void
+createTypedefForUint32_t(void) {
+
+    if (sizeof(unsigned int) == 4)
+        printf("typedef unsigned int uint32_t;\n");
+    else if (sizeof(unsigned long) == 4)
+        printf("typedef unsigned long uint32_t;\n");
+    else {
+        fprintf(stderr, "Cannot find a 32 bit unsigned integer type!\n");
+        exit(1);
+    }
+}
+
+
+
+static void
+createTypedefForUintFast32_t(void) {
+
+    if (sizeof(unsigned int) == 4)
+        printf("typedef unsigned int uint_fast32_t;\n");
+    else if (sizeof(unsigned long) == 4)
+        printf("typedef unsigned long uint_fast32_t;\n");
+    else {
+        fprintf(stderr, "Cannot find a 32 bit unsigned integer type!\n");
+        exit(1);
+    }
+}
+
+
+
+static void
+createTypedefForInt32_t(void) {
+
+    if (sizeof(signed int) == 4)
+        printf("typedef signed int int32_t;\n");
+    else if (sizeof(signed long) == 4)
+        printf("typedef signed long int32_t;\n");
+    else {
+        fprintf(stderr, "Cannot find a 32 bit signed integer type!\n");
+        exit(1);
+    }
+}
+
+
+
+static void
+createTypedefForIntFast32_t(void) {
+
+    if (sizeof(signed int) == 4)
+        printf("typedef signed int int_fast32_t;\n");
+    else if (sizeof(signed long) == 4)
+        printf("typedef signed long int_fast32_t;\n");
+    else {
+        fprintf(stderr, "Cannot find a 32 bit signed integer type!\n");
+        exit(1);
+    }
+}
+
+
+
+int
+main(int argc, char **argv) {
+
+    printf("/* This was generated by the program 'typegen' */\n");
+
+
+    printf("#ifndef INTTYPES_H_NETPBM\n");
+    printf("#define INTTYPES_H_NETPBM\n");
+
+    createTypedefForUint32_t();
+    createTypedefForInt32_t();
+    createTypedefForIntFast32_t();
+    createTypedefForUintFast32_t();
+
+    printf("#endif\n");
+
+    return 0;
+}