Add an fz_tempfile utility.

This will be required for the gprf work.

3 files changed, 36 insertions, 0 deletions

diff --git a/include/mupdf/fitz/output.h b/include/mupdf/fitz/output.h
index 6291d37e..36d194f8 100644
--- a/include/mupdf/fitz/output.h
+++ b/include/mupdf/fitz/output.h
@@ -101,4 +101,10 @@ int fz_fprintf(fz_context *ctx, FILE *file, const char *fmt, ...);
 int fz_vsnprintf(char *buffer, int space, const char *fmt, va_list args);
 int fz_snprintf(char *buffer, int space, const char *fmt, ...);
 
+/*
+	fz_tempfilename: Get a temporary filename based upon 'base'.
+	This must be freed.
+*/
+char *fz_tempfilename(fz_context *ctx, const char *base);
+
 #endif
diff --git a/platform/win32/libmupdf.vcproj b/platform/win32/libmupdf.vcproj
index 07ceb673..8e268f15 100644
--- a/platform/win32/libmupdf.vcproj
+++ b/platform/win32/libmupdf.vcproj
@@ -1010,6 +1010,10 @@
 				>
 			</File>
 			<File
+				RelativePath="..\..\source\fitz\tempfile.c"
+				>
+			</File>
+			<File
 				RelativePath="..\..\source\fitz\test-device.c"
 				>
 			</File>
diff --git a/source/fitz/tempfile.c b/source/fitz/tempfile.c
new file mode 100644
index 00000000..2115923e
--- /dev/null
+++ b/source/fitz/tempfile.c
@@ -0,0 +1,26 @@
+#include "mupdf/fitz.h"
+
+/* Produce a (hopefully) unique temporary filename based upon a given
+ * 'base' name.
+ *
+ * Isolated into a file that can be modified on a per-platform basis
+ * if required.
+ */
+
+char *fz_tempfilename(fz_context *ctx, const char *base)
+{
+	char *tmp = tempnam(".", base);
+	char *ret;
+
+	if (tmp == NULL)
+		fz_throw(ctx, FZ_ERROR_GENERIC, "Failed to construct temporary file name");
+	ret = fz_strdup(ctx, tmp);
+
+	/* The value returned from tempnam is allocated using malloc.
+	 * We must therefore free it using free. Real, honest to God
+	 * free, not Memento_free, or other wrapped versions.
+	 */
+#undef free
+	(free)(tmp);
+	return ret;
+}