[gnunet] branch master updated: add relative_time specs

[gnunet]

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grothoff pushed a commit to branch master
in repository gnunet.

The following commit(s) were added to refs/heads/master by this push:
     new 3695a510a add relative_time specs
3695a510a is described below

commit 3695a510a18d0bb9ed58fb5270856a88853b4e30
Author: Christian Grothoff <address@hidden>
AuthorDate: Fri Apr 17 19:13:42 2020 +0200

    add relative_time specs
---
 src/include/gnunet_pq_lib.h | 22 +++++++++++
 src/pq/pq_query_helper.c    | 62 +++++++++++++++++++++++++++++++
 src/pq/pq_result_helper.c   | 90 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 174 insertions(+)

diff --git a/src/include/gnunet_pq_lib.h b/src/include/gnunet_pq_lib.h
index 12ec19d7e..ca549f77c 100644
--- a/src/include/gnunet_pq_lib.h
+++ b/src/include/gnunet_pq_lib.h
@@ -151,6 +151,16 @@ GNUNET_PQ_query_param_rsa_signature (
   const struct GNUNET_CRYPTO_RsaSignature *x);
 
 
+/**
+ * Generate query parameter for a relative time value.
+ * The database must store a 64-bit integer.
+ *
+ * @param x pointer to the query parameter to pass
+ */
+struct GNUNET_PQ_QueryParam
+GNUNET_PQ_query_param_relative_time (const struct GNUNET_TIME_Relative *x);
+
+
 /**
  * Generate query parameter for an absolute time value.
  * The database must store a 64-bit integer.
@@ -376,6 +386,18 @@ GNUNET_PQ_result_spec_absolute_time (const char *name,
                                      struct GNUNET_TIME_Absolute *at);
 
 
+/**
+ * Relative time expected.
+ *
+ * @param name name of the field in the table
+ * @param[out] rt where to store the result
+ * @return array entry for the result specification to use
+ */
+struct GNUNET_PQ_ResultSpec
+GNUNET_PQ_result_spec_relative_time (const char *name,
+                                     struct GNUNET_TIME_Relative *rt);
+
+
 /**
  * Absolute time expected.
  *
diff --git a/src/pq/pq_query_helper.c b/src/pq/pq_query_helper.c
index 1290a6fb2..a36848f3a 100644
--- a/src/pq/pq_query_helper.c
+++ b/src/pq/pq_query_helper.c
@@ -387,6 +387,68 @@ GNUNET_PQ_query_param_rsa_signature (const struct 
GNUNET_CRYPTO_RsaSignature *x)
 }
 
 
+/**
+ * Function called to convert input argument into SQL parameters.
+ *
+ * @param cls closure
+ * @param data pointer to input argument
+ * @param data_len number of bytes in @a data (if applicable)
+ * @param[out] param_values SQL data to set
+ * @param[out] param_lengths SQL length data to set
+ * @param[out] param_formats SQL format data to set
+ * @param param_length number of entries available in the @a param_values, @a 
param_lengths and @a param_formats arrays
+ * @param[out] scratch buffer for dynamic allocations (to be done via 
#GNUNET_malloc()
+ * @param scratch_length number of entries left in @a scratch
+ * @return -1 on error, number of offsets used in @a scratch otherwise
+ */
+static int
+qconv_rel_time (void *cls,
+                const void *data,
+                size_t data_len,
+                void *param_values[],
+                int param_lengths[],
+                int param_formats[],
+                unsigned int param_length,
+                void *scratch[],
+                unsigned int scratch_length)
+{
+  const struct GNUNET_TIME_Relative *u = data;
+  struct GNUNET_TIME_Relative rel;
+  uint64_t *u_nbo;
+
+  GNUNET_break (NULL == cls);
+  if (1 != param_length)
+    return -1;
+  rel = *u;
+  if (rel.rel_value_us > INT64_MAX)
+    rel.rel_value_us = INT64_MAX;
+  u_nbo = GNUNET_new (uint64_t);
+  scratch[0] = u_nbo;
+  *u_nbo = GNUNET_htonll (rel.rel_value_us);
+  param_values[0] = (void *) u_nbo;
+  param_lengths[0] = sizeof(uint64_t);
+  param_formats[0] = 1;
+  return 1;
+}
+
+
+/**
+ * Generate query parameter for a relative time value.
+ * The database must store a 64-bit integer.
+ *
+ * @param x pointer to the query parameter to pass
+ * @return array entry for the query parameters to use
+ */
+struct GNUNET_PQ_QueryParam
+GNUNET_PQ_query_param_relative_time (const struct GNUNET_TIME_Relative *x)
+{
+  struct GNUNET_PQ_QueryParam res =
+  { &qconv_rel_time, NULL, x, sizeof(*x), 1 };
+
+  return res;
+}
+
+
 /**
  * Function called to convert input argument into SQL parameters.
  *
diff --git a/src/pq/pq_result_helper.c b/src/pq/pq_result_helper.c
index dc64597f8..f764593b0 100644
--- a/src/pq/pq_result_helper.c
+++ b/src/pq/pq_result_helper.c
@@ -530,6 +530,96 @@ GNUNET_PQ_result_spec_string (const char *name,
 }
 
 
+/**
+ * Extract data from a Postgres database @a result at row @a row.
+ *
+ * @param cls closure
+ * @param result where to extract data from
+ * @param int row to extract data from
+ * @param fname name (or prefix) of the fields to extract from
+ * @param[in,out] dst_size where to store size of result, may be NULL
+ * @param[out] dst where to store the result
+ * @return
+ *   #GNUNET_YES if all results could be extracted
+ *   #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
+ */
+static int
+extract_rel_time (void *cls,
+                  PGresult *result,
+                  int row,
+                  const char *fname,
+                  size_t *dst_size,
+                  void *dst)
+{
+  struct GNUNET_TIME_Relative *udst = dst;
+  const int64_t *res;
+  int fnum;
+
+  (void) cls;
+  fnum = PQfnumber (result,
+                    fname);
+  if (fnum < 0)
+  {
+    GNUNET_break (0);
+    return GNUNET_SYSERR;
+  }
+  if (PQgetisnull (result,
+                   row,
+                   fnum))
+  {
+    GNUNET_break (0);
+    return GNUNET_SYSERR;
+  }
+  GNUNET_assert (NULL != dst);
+  if (sizeof(struct GNUNET_TIME_Relative) != *dst_size)
+  {
+    GNUNET_break (0);
+    return GNUNET_SYSERR;
+  }
+  if (sizeof(int64_t) !=
+      PQgetlength (result,
+                   row,
+                   fnum))
+  {
+    GNUNET_break (0);
+    return GNUNET_SYSERR;
+  }
+  res = (int64_t *) PQgetvalue (result,
+                                row,
+                                fnum);
+  if (INT64_MAX == GNUNET_ntohll ((uint64_t) *res))
+    *udst = GNUNET_TIME_UNIT_FOREVER_REL;
+  else
+    udst->rel_value_us = GNUNET_ntohll ((uint64_t) *res);
+  return GNUNET_OK;
+}
+
+
+/**
+ * Relative time expected.
+ *
+ * @param name name of the field in the table
+ * @param[out] at where to store the result
+ * @return array entry for the result specification to use
+ */
+struct GNUNET_PQ_ResultSpec
+GNUNET_PQ_result_spec_relative_time (const char *name,
+                                     struct GNUNET_TIME_Relative *rt)
+{
+  struct GNUNET_PQ_ResultSpec res = {
+    &extract_rel_time,
+    NULL,
+    NULL,
+    (void *) rt,
+    sizeof(*rt),
+    name,
+    NULL
+  };
+
+  return res;
+}
+
+
 /**
  * Extract data from a Postgres database @a result at row @a row.
  *

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