Stringification of a macro value

The xstr macro defined below will stringify after doing macro-expansion.

#define xstr(a) str(a)#define str(a) #a#define RECORDS_PER_PAGE 10#define REQUEST_RECORDS \    "SELECT Fields FROM Table WHERE Conditions" \    " OFFSET %d * " xstr(RECORDS_PER_PAGE) \    " LIMIT " xstr(RECORDS_PER_PAGE) ";"

#include <stdio.h>#define RECORDS_PER_PAGE 10#define TEXTIFY(A) #A#define _REQUEST_RECORDS(OFFSET, LIMIT)                 \        "SELECT Fields FROM Table WHERE Conditions"     \        " OFFSET %d * " TEXTIFY(OFFSET)                 \        " LIMIT " TEXTIFY(LIMIT) ";"#define REQUEST_RECORDS _REQUEST_RECORDS(RECORDS_PER_PAGE, RECORDS_PER_PAGE)int main() {        printf("%s\n", REQUEST_RECORDS);        return 0;}

Outputs:

SELECT Fields FROM Table WHERE Conditions OFFSET %d * 10 LIMIT 10;

Note the indirection to _REQUEST_RECORDS to evaluate the arguments before stringifying them.

Try double escaping your quotes

#define RECORDS_PER_PAGE 10#define MAX_RECORD_LEN 10 /*... */#define DOUBLEESCAPE(a) #a#define ESCAPEQUOTE(a) DOUBLEESCAPE(a)#define REQUEST_RECORDS \      "SELECT Fields FROM Table WHERE Conditions" \      " OFFSET %d * " ESCAPEQUOTE(RECORDS_PER_PAGE)       \      " LIMIT " ESCAPEQUOTE(RECORDS_PER_PAGE) ";" char result_buffer[RECORDS_PER_PAGE][MAX_RECORD_LEN];int main(){  char * a = REQUEST_RECORDS;}

compiles for me. The token RECORDS_PER_PAGE will be expanded by the ESCAPEQUOTE macro call, which is then sent into DOUBLEESCAPE to be quoted.