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Added a join helper

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This commit is contained in:
Craig Williams
2020-10-07 13:01:36 +01:00
parent 0787fd8e3c
commit 6335951046
2 changed files with 48 additions and 0 deletions
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39
src/modb_p.c
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@@ -27,6 +27,45 @@ void modbTableName_sb(str_builder *sb, modb_ref *modb, const char *suffix, size_
}
char *modbJoin(modb_ref *modb,
const char *join, size_t join_len, int equals,
const char *tableA, size_t tableA_len, const char *colA, size_t colA_len,
const char *tableB, size_t tableB_len, const char *colB, size_t colB_len)
{
str_builder *sb;
char *str;
size_t len;
if ((sb = strbld_create()) == 0) {
return 0;
}
modbJoin_sb(sb, modb,
join, join_len, equals,
tableA, tableA_len, colA, colA_len,
tableB, tableB_len, colB, colB_len);
if (strbld_finalize_or_destroy(&sb, &str, &len) != 0) {
return 0;
}
return str;
}
void modbJoin_sb(str_builder *sb, modb_ref *modb,
const char *join, size_t join_len, int equals,
const char *tableA, size_t tableA_len, const char *colA, size_t colA_len,
const char *tableB, size_t tableB_len, const char *colB, size_t colB_len)
{
strbld_str(sb, join, join_len);
strbld_str(sb, " JOIN ", 6);
modbTableName_sb(sb, modb, tableA, tableA_len);
strbld_str(sb, " ON ", 4);
modbColumnName_sb(sb, modb, tableA, tableA_len, colA, colA_len);
strbld_str(sb, equals ? " = " : " != ", 4);
modbColumnName_sb(sb, modb, tableB, tableB_len, colB, colB_len);
}
char *modbColumnName(modb_ref *modb,
const char *table, size_t table_len,
const char *column, size_t column_len)

9
src/modb_p.h
View File

@@ -22,6 +22,15 @@
char *modbTableName(modb_ref *modb, const char *suffix, size_t suffix_len);
void modbTableName_sb(str_builder *sb, modb_ref *modb, const char *suffix, size_t suffix_len);
char *modbJoin(modb_ref *modb,
const char *join, size_t join_len, int equals,
const char *tableA, size_t tableA_len, const char *colA, size_t colA_len,
const char *tableB, size_t tableB_len, const char *colB, size_t colB_len);
void modbJoin_sb(str_builder *sb, modb_ref *modb,
const char *join, size_t join_len, int equals,
const char *tableA, size_t tableA_len, const char *colA, size_t colA_len,
const char *tableB, size_t tableB_len, const char *colB, size_t colB_len);
char *modbColumnName(modb_ref *modb,
const char *table, size_t table_len,
const char *column, size_t column_len);