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authorLukas Fleischer <lfleischer@calcurse.org>2016-01-11 19:32:14 +0100
committerLukas Fleischer <lfleischer@calcurse.org>2016-01-13 17:39:44 +0100
commit03d35bacf44d7f3e63805411370b7ada8aae93e8 (patch)
tree75c3b1b5e3f20d060e35156f50a2638879871c12 /src/strings.c
parent0b7614a4a7a88167066ee28553d278ac4bb66714 (diff)
downloadcalcurse-03d35bacf44d7f3e63805411370b7ada8aae93e8.zip
Implement utility functions for dynamic strings
Introduce support for strings which support concatenating the current value with a printf-style formatted value, thereby growing in size dynamically. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
Diffstat (limited to 'src/strings.c')
-rw-r--r--src/strings.c112
1 files changed, 112 insertions, 0 deletions
diff --git a/src/strings.c b/src/strings.c
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+++ b/src/strings.c
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+/*
+ * Calcurse - text-based organizer
+ *
+ * Copyright (c) 2004-2016 calcurse Development Team <misc@calcurse.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the
+ * following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the
+ * following disclaimer in the documentation and/or other
+ * materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Send your feedback or comments to : misc@calcurse.org
+ * Calcurse home page : http://calcurse.org
+ *
+ */
+
+#include "calcurse.h"
+
+#define STRING_INITIAL_BUFSIZE 128
+
+void string_init(struct string *sb)
+{
+ sb->buf = mem_malloc(STRING_INITIAL_BUFSIZE);
+ sb->bufsize = STRING_INITIAL_BUFSIZE;
+ sb->len = 0;
+}
+
+void string_reset(struct string *sb)
+{
+ if (sb->buf)
+ mem_free(sb->buf);
+ string_init(sb);
+}
+
+int string_grow(struct string *sb, int minsize)
+{
+ if (sb->bufsize >= minsize)
+ return 0;
+
+ while (sb->bufsize < minsize)
+ sb->bufsize *= 2;
+
+ sb->buf = mem_realloc(sb->buf, 1, sb->bufsize);
+ return 1;
+}
+
+char *string_buf(struct string *sb)
+{
+ return sb->buf;
+}
+
+int string_vcatf(struct string *sb, const char *format, va_list ap)
+{
+ va_list ap2;
+ int n;
+
+ va_copy(ap2, ap);
+
+ n = vsnprintf(sb->buf + sb->len, sb->bufsize - sb->len, format, ap);
+ if (string_grow(sb, sb->len + n + 1)) {
+ n = vsnprintf(sb->buf + sb->len, sb->bufsize - sb->len, format,
+ ap2);
+ }
+ sb->len += n;
+
+ return n;
+}
+
+int string_catf(struct string *sb, const char *format, ...)
+{
+ va_list ap;
+ int n;
+
+ va_start(ap, format);
+ n = string_vcatf(sb, format, ap);
+ va_end(ap);
+
+ return n;
+}
+
+int string_printf(struct string *sb, const char *format, ...)
+{
+ va_list ap;
+ int n;
+
+ va_start(ap, format);
+ string_reset(sb);
+ n = string_vcatf(sb, format, ap);
+ va_end(ap);
+
+ return n;
+}