initial commit

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@3 fefdeb5f-60dc-0310-8127-8f9354f1896f

src/strbuf.c

@@ -0,0 +1,122 @@
+#ifndef foostrbufhfoo
+#define foostrbufhfoo
+
+#include <sys/types.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <string.h>
+#include <stdarg.h>
+#include <stdio.h>
+
+struct chunk {
+    struct chunk *next;
+    char text[];
+};
+
+struct strbuf {
+    size_t length;
+    struct chunk *head, *tail;
+};
+
+struct strbuf *strbuf_new(void) {
+    struct strbuf *sb = malloc(sizeof(struct strbuf));
+    assert(sb);
+    sb->length = 0;
+    sb->head = sb->tail = NULL;
+    return sb;
+}
+
+void strbuf_free(struct strbuf *sb) {
+    assert(sb);
+    while (sb->head) {
+        struct chunk *c = sb->head;
+        sb->head = sb->head->next;
+        free(c);
+    }
+
+    free(sb);
+}
+
+char *strbuf_tostring(struct strbuf *sb) {
+    char *t, *e;
+    struct chunk *c;
+    assert(sb);
+
+    t = malloc(sb->length+1);
+    assert(t);
+
+    e = t;
+    *e = 0;
+    for (c = sb->head; c; c = c->next) {
+        strcpy(e, c->text);
+        e = strchr(e, 0);
+    }
+
+    return t;
+}
+
+void strbuf_puts(struct strbuf *sb, const char *t) {
+    struct chunk *c;
+    size_t l;
+    assert(sb && t);
+
+    l = strlen(t);
+    c = malloc(sizeof(struct chunk)+l);
+    assert(c);
+
+    c->next = NULL;
+    strcpy(c->text, t);
+
+    if (sb->tail) {
+        assert(sb->head);
+        sb->tail->next = c;
+    } else {
+        assert(!sb->head);
+        sb->head = c;
+    }
+
+    sb->tail = c;
+    sb->length += l;
+}
+
+int strbuf_printf(struct strbuf *sb, const char *format, ...) {
+    int r, size = 100;
+    struct chunk *c = NULL;
+
+    assert(sb);
+    
+    for(;;) {
+        va_list ap;
+
+        c = realloc(c, sizeof(struct chunk)+size);
+        assert(c);
+
+        va_start(ap, format);
+        r = vsnprintf(c->text, size, format, ap);
+        va_end(ap);
+        
+        if (r > -1 && r < size) {
+            c->next = NULL;
+            
+            if (sb->tail) {
+                assert(sb->head);
+                sb->tail->next = c;
+            } else {
+                assert(!sb->head);
+                sb->head = c;
+            }
+            
+            sb->tail = c;
+            sb->length += r;
+            
+            return r;
+        }
+
+        if (r > -1)    /* glibc 2.1 */
+            size = r+1; 
+        else           /* glibc 2.0 */
+            size *= 2;
+    }
+}
+
+#endif