Initial revision

1 files changed, 134 insertions, 0 deletions

diff --git a/readfile.c b/readfile.c
new file mode 100644
index 0000000..f8683be
--- /dev/null
+++ b/readfile.c
@@ -0,0 +1,134 @@
+/* $XConsortium: readfile.c,v 1.5 94/12/11 14:25:48 gildea Exp $ */
+/*
+
+Copyright (c) 1988, 1991  X Consortium
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of the X Consortium shall
+not be used in advertising or otherwise to promote the sale, use or
+other dealings in this Software without prior written authorization
+from the X Consortium.
+
+*/
+/* $XFree86: xc/programs/xmessage/readfile.c,v 1.2 2000/02/14 19:21:04 dawes Exp $ */
+
+#include <X11/Xos.h>			/* for types.h */
+#include <sys/stat.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+/*
+ * get_data_from_file - read data from a file into a single buffer; meant 
+ * for small files containing messages.
+ */
+static char *get_data_from_file (filename, len_return)
+    char *filename;
+    int *len_return;
+{
+    FILE *fp;
+    struct stat statbuf;
+    char *cp;
+    int count;
+
+    if (stat (filename, &statbuf) != 0 || statbuf.st_size < 0) {
+	perror(filename);
+	return NULL;
+    }
+
+    cp = malloc (statbuf.st_size + 1);
+    if (!cp) {
+	fprintf(stderr, "cannot get memory for message file\n");
+	return NULL;
+    }
+
+    fp = fopen (filename, "r");
+    if (!fp) {
+	perror(filename);
+	(void) free (cp);
+	return NULL;
+    }
+
+    count = fread (cp, 1, statbuf.st_size, fp);
+    if (count == 0 && statbuf.st_size != 0) {
+	perror(filename);
+	(void) free (cp);
+	(void) fclose (fp);
+	return NULL;
+    }
+
+    cp[count] = '\0';		/* since we allocated one extra */
+    *len_return = count;
+    (void) fclose (fp);
+    return cp;
+}
+
+/*
+ * get_data_from_stdin - read data from stdin into a single buffer.
+ */
+static char *get_data_from_stdin (len_return)
+    int *len_return;
+{
+    char *cp;
+    int count;
+    int allocated;
+    int n;
+
+    allocated = BUFSIZ;
+    cp = malloc (allocated + 1);
+    if (!cp) {
+	fprintf(stderr, "cannot get memory for message file\n");
+	return NULL;
+    }
+    count = 0;
+
+    while ((n = fread (cp + count, 1, BUFSIZ, stdin)) > 0) {
+	count += n;
+	/* Here count <= allocated. Prepare for next round. */
+	if (count + BUFSIZ > allocated) {
+	    allocated = 2 * allocated;
+	    cp = realloc (cp, allocated + 1);
+	    if (!cp) {
+		fprintf(stderr, "cannot get memory for message file\n");
+		return NULL;
+	    }
+	}
+    }
+
+    cp[count] = '\0';		/* since we allocated one extra */
+    *len_return = count;
+    return cp;
+}
+
+
+/*
+ * read_file - read data from indicated file and return pointer to malloced
+ * buffer.  Returns NULL on error or if no such file.
+ */
+char *read_file (filename, len)
+    char *filename;
+    int *len;			/* returned */
+{
+    if (filename[0] == '-' && filename[1] == '\0') {
+	return (get_data_from_stdin (len));
+    } else {
+	return (get_data_from_file (filename, len));
+    }
+}