Re: a question about g_strconcat()

[Bernhard Schuster <schuster bernhard googlemail com>]

I answered that some time ago:

http://stackoverflow.com/questions/11486704/c-sql-query-building-made-easy/11725655#11725655


On Thu, Feb 28, 2013 at 1:22 PM, Cifer Lee <mantianyu gmail com> wrote:
first, I will show some lines. 
[code] 
gchar *str_sample = g_strconcat("I have a", "dream that", NULL); 

str_sample = g_strconcat(str_sample, " one day", NULL); 

str_sample = g_strconcat(str_sample, " we can be friends.", NULL); 

// do some work with str_sample 

g_free(str_sample); 
[/code] 

if, for some reasons, I must call g_strconcat() three times, or in 
concrete, I must follow some conditions to determine whether should I 
concatenate each of the three phrases.... okay, actually, I am writing a 
sql query phrase, like this: 

if the parameter an_id is a empty string, then I will not append it to the 
select phrase. 

select * from a_table where 1=1 and `id`='an_id' and `name`='a_name' 


actually, I have debug my program and find that each time the str_sample 
variable has been assigned a different address. But I'm not sure the 
internal mechanism of g_strconcat(), whether it apply for a totally new 
space or a space that may overlap with the earlier applied space, if the 
latter, then I can't free the earlier applied space, and I think it may 
lead to memory leak. 
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