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| author | Greg Hudson <ghudson@mit.edu> | 2014-05-04 15:43:35 -0400 |
|---|---|---|
| committer | Greg Hudson <ghudson@mit.edu> | 2014-05-17 18:45:27 -0400 |
| commit | ccd989bdc2656b153bc226462e0c13800810ae04 (patch) | |
| tree | 538f35a5cccac48c2afb7e93106cdf3e4bf8af0f | |
| parent | ba1558660f0cbd8639ac323dac11c52f88ac079d (diff) | |
| download | krb5-ccd989bdc2656b153bc226462e0c13800810ae04.tar.gz krb5-ccd989bdc2656b153bc226462e0c13800810ae04.tar.xz krb5-ccd989bdc2656b153bc226462e0c13800810ae04.zip | |
Add k5_buf_get_space
Add a new k5_buf method to make room in the buffer for the caller to
fill in.
| -rw-r--r-- | src/include/k5-buf.h | 4 | ||||
| -rw-r--r-- | src/util/support/k5buf.c | 10 | ||||
| -rw-r--r-- | src/util/support/libkrb5support-fixed.exports | 1 |
3 files changed, 15 insertions, 0 deletions
diff --git a/src/include/k5-buf.h b/src/include/k5-buf.h index c5576a3e3..da10fd9f4 100644 --- a/src/include/k5-buf.h +++ b/src/include/k5-buf.h @@ -91,6 +91,10 @@ void k5_buf_add_fmt(struct k5buf *buf, const char *fmt, ...) #endif ; +/* Extend the length of buf by len and return a pointer to the reserved space, + * to be filled in by the caller. Return NULL on error. */ +void *k5_buf_get_space(struct k5buf *buf, size_t len); + /* Truncate BUF. LEN must be between 0 and the existing buffer * length, or an assertion failure will result. */ void k5_buf_truncate(struct k5buf *buf, size_t len); diff --git a/src/util/support/k5buf.c b/src/util/support/k5buf.c index 778e68b39..c3c81b0b2 100644 --- a/src/util/support/k5buf.c +++ b/src/util/support/k5buf.c @@ -191,6 +191,16 @@ k5_buf_add_fmt(struct k5buf *buf, const char *fmt, ...) free(tmp); } +void * +k5_buf_get_space(struct k5buf *buf, size_t len) +{ + if (!ensure_space(buf, len)) + return NULL; + buf->len += len; + buf->data[buf->len] = '\0'; + return &buf->data[buf->len - len]; +} + void k5_buf_truncate(struct k5buf *buf, size_t len) { diff --git a/src/util/support/libkrb5support-fixed.exports b/src/util/support/libkrb5support-fixed.exports index 2f38242d9..f5fbe9e0c 100644 --- a/src/util/support/libkrb5support-fixed.exports +++ b/src/util/support/libkrb5support-fixed.exports @@ -6,6 +6,7 @@ k5_buf_init_dynamic k5_buf_add k5_buf_add_len k5_buf_add_fmt +k5_buf_get_space k5_buf_truncate k5_buf_data k5_buf_len |