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/* |
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* This code is copied from the O'Reilly Lex & Yacc book, 2nd Edition, |
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* 1995, by John R. Levine, Tony Mason, and Doug Brown. |
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* |
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* Enhancements added: exec_sql() and embedded perl. |
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* Jeremy Hickerson, 5/8/2002 |
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*/ |
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|
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#include <stdio.h> |
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#include <string.h> |
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#include <EXTERN.h> |
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|
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#include <perl.h> |
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#include "flexdef.h" |
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|
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#include "obj_srvr.tab.h" |
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|
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#include "obj_srvr.h" |
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|
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static PerlInterpreter *my_perl; |
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|
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extern FILE *yyout; /* lex output file */ |
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|
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#define EMBED_PERL(arg_expr, call_expr) \ |
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dSP; \ |
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int i, count; \ |
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ENTER; \ |
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SAVETMPS; \ |
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PUSHMARK(SP); \ |
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arg_expr \ |
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PUTBACK; \ |
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call_expr \ |
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SPAGAIN ; \ |
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if (count != 1) \ |
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croak("Big trouble\n") ; \ |
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strcpy(perl_buf, POPp); \ |
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PUTBACK ; \ |
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FREETMPS; \ |
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LEAVE; |
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|
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char save_buf[SQL_SIZE]; /* buffer for SQL command */ |
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char *savebp; /* current buffer pointer */ |
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char buf[BUFSIZE]; |
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char perl_buf[BUFSIZE]; |
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char args[10][ARGSIZE]; |
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|
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/* external prototypes */ |
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|
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EXTERN_C void boot_DynaLoader (pTHX_ CV* cv); |
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|
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EXTERN_C void |
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xs_init(pTHX) |
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{ |
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char *file = __FILE__; |
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/* DynaLoader is a special case */ |
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newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file); |
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} |
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|
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/* local prototypes */ |
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int exec_sql(); |
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int call_perl_get_data(); |
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int call_perl_sub(char *sub, int argc); |
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|
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/* start an embedded command after EXEC SQL */ |
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start_save(void) { |
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savebp = save_buf; |
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glb_errflag = 0; |
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savebp[0] = '\0'; /* discard previous text */ |
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} |
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|
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/* save a SQL token */ |
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save_str(char *s) { |
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|
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strcpy(savebp, s); |
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savebp += strlen(s); |
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|
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strcpy(yylval.strval, strdup(s) ); |
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|
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} |
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|
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/* end of SQL command, now write it out */ |
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end_sql(void) { |
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int i; |
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register char *cp; |
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savebp--; /* back over the closing semicolon */ /* jhjh - don't want? */ |
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|
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/* jdh, 5/8/2002: call "exec_sql" function */ |
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exec_sql(); |
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|
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/* return scanner to regular mode */ |
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un_sql(); |
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} |
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|
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/* jdh, 10/22/2002 */ |
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int exec_sql() { |
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|
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if (glb_errflag) |
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return 0; /* don't abort; error message will have been returned */ |
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|
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/* fall-through */ |
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call_perl_get_data(); |
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|
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return 0; |
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} |
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|
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/* jdh, 10/22/2002 */ |
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int call_perl_get_data() { |
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|
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strcpy(args[0], parsed_sql.column_list); |
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strcpy(args[1], parsed_sql.table_list); |
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strcpy(args[2], parsed_sql.where_clause); |
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strcpy(args[3], parsed_sql.order_by); |
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call_perl_sub("get_data", 4); |
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return 0; |
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} |
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|
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char *call_perl_like2re(char *word1, char *word2, char *word3, char *word4) { |
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EMBED_PERL( |
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XPUSHs(sv_2mortal(newSVpv(word1, 0))); |
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XPUSHs(sv_2mortal(newSVpv(word2, 0))); |
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XPUSHs(sv_2mortal(newSVpv(word3, 0))); |
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XPUSHs(sv_2mortal(newSVpv(word4, 0)));, |
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|
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count = call_pv("like2re", G_SCALAR); ) |
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|
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return perl_buf; |
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} |
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|
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char *call_perl_tr_op(char *table, char *word1, char *word2, char *word3) { |
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|
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EMBED_PERL( |
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|
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XPUSHs(sv_2mortal(newSVpv(table, 0))); |
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XPUSHs(sv_2mortal(newSVpv(word1, 0))); |
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XPUSHs(sv_2mortal(newSVpv(word2, 0))); |
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XPUSHs(sv_2mortal(newSVpv(word3, 0)));, |
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|
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count = call_pv("tr_op", G_SCALAR); ) |
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|
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return perl_buf; |
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} |
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|
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int call_perl_connect2client(char *remote, char *port) { |
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|
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strcpy(args[0], remote); |
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strcpy(args[1], port); |
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call_perl_sub("connect2client", 2); |
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return 0; |
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} |
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char *call_perl_get_yyin(int size) { |
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|
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EMBED_PERL(XPUSHs(sv_2mortal(newSViv(size))); , |
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count = call_pv("get_yyin", G_SCALAR); ) |
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|
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return perl_buf; |
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} |
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int call_perl_send_yyout(char *s) { |
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strcpy(args[0], s); |
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call_perl_sub("send_yyout", 1); |
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return 0; |
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} |
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|
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/* jdh, 10/22/2002 */ |
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/* Note: all args must be (char *); we will convert these in perl sub. |
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* Sub must return (char *) */ |
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int call_perl_sub(char *sub, int argc) { |
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|
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EMBED_PERL( |
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|
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for(i = 0; i < argc; i++) { |
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XPUSHs(sv_2mortal(newSVpv(args[i], 0))); |
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}, |
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count = call_pv(sub, G_SCALAR); ) |
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return 0; |
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} |
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|
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/* jdh, 5/8/2002 */ |
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/* note to self: embed_perl is called from C code generated from obj_srvr.l */ |
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/* thus: embed_perl_obj_srvr(2, perl_argv, NULL); */ |
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/* where static char *perl_argv[] = {"obj_srvr", "obj_srvr.pl", "uid", */ |
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/* "passwd", stdout}; */ |
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int embed_perl_obj_srvr(int argc, char **argv, char **env) { |
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my_perl = perl_alloc(); |
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perl_construct(my_perl); |
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perl_parse(my_perl, xs_init, argc, argv, env); |
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perl_run(my_perl); /* just to initialize */ |
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return 0; |
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} |
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/* jdh, 5/8/2002 */ |
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end_perl(void) { |
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perl_destruct(my_perl); |
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perl_free(my_perl); |
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} |
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