static int csv_write_record(TABDCA *dca, struct csv *csv) { /* write next record to csv data file */ int k, nf, ret = 0; const char *c; xassert(csv->mode == 'W'); nf = mpl_tab_num_flds(dca); for (k = 1; k <= nf; k++) { switch (mpl_tab_get_type(dca, k)) { case 'N': fprintf(csv->fp, "%.*g", DBL_DIG, mpl_tab_get_num(dca, k)); break; case 'S': fputc('"', csv->fp); for (c = mpl_tab_get_str(dca, k); *c != '\0'; c++) { if (*c == '"') fputc('"', csv->fp), fputc('"', csv->fp); else fputc(*c, csv->fp); } fputc('"', csv->fp); break; default: xassert(dca != dca); } fputc(k < nf ? ',' : '\n', csv->fp); } csv->count++; if (ferror(csv->fp)) { xprintf("%s:%d: write error - %s\n", csv->fname, csv->count, strerror(errno)); ret = 1; } return ret; }
static char *db_generate_select_stmt(TABDCA *dca) /* generate select statement */ { char *arg; char const *field; char *query; int j; int narg; int nf; int total; total = 50; nf = mpl_tab_num_flds(dca); narg = mpl_tab_num_args(dca); for (j=1; j <= nf && j <= SQL_FIELD_MAX; j++) { field = mpl_tab_get_name(dca, j); total += strlen(field); total += 2; } arg = (char *) mpl_tab_get_arg(dca, narg); total += strlen(arg); query = xmalloc( total * sizeof(char)); strcpy (query, "SELECT "); for (j=1; j <= nf && j <= SQL_FIELD_MAX; j++) { field = mpl_tab_get_name(dca, j); strcat(query, field); if ( j < nf ) strcat(query, ", "); } strcat(query, " FROM "); strcat(query, arg); return query; }
static int dbf_write_record(TABDCA *dca, struct dbf *dbf) { /* write next record to xBASE data file */ int j, k, ret = 0; char buf[255+1]; xassert(dbf->mode == 'W'); if (setjmp(dbf->jump)) { ret = 1; goto done; } /* record flag */ write_byte(dbf, 0x20); xassert(dbf->nf == mpl_tab_num_flds(dca)); for (k = 1; k <= dbf->nf; k++) { if (dbf->type[k] == 'C') { /* character field */ const char *str; if (mpl_tab_get_type(dca, k) == 'N') { sprintf(buf, "%.*g", DBL_DIG, mpl_tab_get_num(dca, k)); str = buf; } else if (mpl_tab_get_type(dca, k) == 'S') str = mpl_tab_get_str(dca, k); else xassert(dca != dca); if ((int)strlen(str) > dbf->len[k]) { xprintf("xBASE driver: field %s: cannot convert %.15s..." " to field format\n", mpl_tab_get_name(dca, k), str); longjmp(dbf->jump, 0); } for (j = 0; j < dbf->len[k] && str[j] != '\0'; j++) write_byte(dbf, str[j]); for (j = j; j < dbf->len[k]; j++) write_byte(dbf, ' '); } else if (dbf->type[k] == 'N') { /* numeric field */ double num = mpl_tab_get_num(dca, k); if (fabs(num) > 1e20) err: { xprintf("xBASE driver: field %s: cannot convert %g to fi" "eld format\n", mpl_tab_get_name(dca, k), num); longjmp(dbf->jump, 0); } sprintf(buf, "%*.*f", dbf->len[k], dbf->prec[k], num); xassert(strlen(buf) < sizeof(buf)); if ((int)strlen(buf) != dbf->len[k]) goto err; for (j = 0; j < dbf->len[k]; j++) write_byte(dbf, buf[j]); } else xassert(dbf != dbf); } /* increase record count */ dbf->count++; done: return ret; }
static char *db_generate_insert_stmt(TABDCA *dca) /* generate insert statement */ { char *arg; char const *field; char *query; int j; int narg; int nf; int total; total = 50; nf = mpl_tab_num_flds(dca); narg = mpl_tab_num_args(dca); for (j=1; j <= nf && j <= SQL_FIELD_MAX; j++) { field = mpl_tab_get_name(dca, j); total += strlen(field); total += 5; } arg = (char *) mpl_tab_get_arg(dca, narg); total += strlen(arg); query = xmalloc( (total+1) * sizeof(char)); strcpy (query, "INSERT INTO "); strcat(query, arg); strcat(query, " ( "); for (j=1; j <= nf && j <= SQL_FIELD_MAX; j++) { field = mpl_tab_get_name(dca, j); strcat(query, field); if ( j < nf ) strcat(query, ", "); } strcat(query, " ) VALUES ( "); for (j=1; j <= nf && j <= SQL_FIELD_MAX; j++) { strcat(query, "?"); if ( j < nf ) strcat(query, ", "); } strcat(query, " )"); return query; }
static void parse_third_arg(TABDCA *dca, struct dbf *dbf) { /* parse xBASE file format (third argument) */ int j, k, temp; const char *arg; dbf->nf = mpl_tab_num_flds(dca); arg = mpl_tab_get_arg(dca, 3), j = 0; for (k = 1; k <= dbf->nf; k++) { /* parse specification of k-th field */ if (arg[j] == '\0') { xprintf("xBASE driver: field %s: specification missing\n", mpl_tab_get_name(dca, k)); longjmp(dbf->jump, 0); } /* parse field type */ if (arg[j] == 'C' || arg[j] == 'N') dbf->type[k] = arg[j], j++; else { xprintf("xBASE driver: field %s: invalid field type\n", mpl_tab_get_name(dca, k)); longjmp(dbf->jump, 0); } /* check for left parenthesis */ if (arg[j] == '(') j++; else err: { xprintf("xBASE driver: field %s: invalid field format\n", mpl_tab_get_name(dca, k)); longjmp(dbf->jump, 0); } /* parse field length */ temp = 0; while (isdigit(arg[j])) { if (temp > DBF_FDLEN_MAX) break; temp = 10 * temp + (arg[j] - '0'), j++; } if (!(1 <= temp && temp <= DBF_FDLEN_MAX)) { xprintf("xBASE driver: field %s: invalid field length\n", mpl_tab_get_name(dca, k)); longjmp(dbf->jump, 0); } dbf->len[k] = temp; /* parse optional field precision */ if (dbf->type[k] == 'N' && arg[j] == ',') { j++; temp = 0; while (isdigit(arg[j])) { if (temp > dbf->len[k]) break; temp = 10 * temp + (arg[j] - '0'), j++; } if (temp > dbf->len[k]) { xprintf("xBASE driver: field %s: invalid field precision" "\n", mpl_tab_get_name(dca, k)); longjmp(dbf->jump, 0); } dbf->prec[k] = temp; } else dbf->prec[k] = 0; /* check for right parenthesis */ if (arg[j] == ')') j++; else goto err; } /* ignore other specifications */ return; }
static void read_header(TABDCA *dca, struct dbf *dbf) { /* read xBASE data file header */ int b, j, k, recl; char name[10+1]; /* (ignored) */ for (j = 1; j <= 10; j++) read_byte(dbf); /* length of each record, in bytes */ recl = read_byte(dbf); recl += read_byte(dbf) << 8; /* (ignored) */ for (j = 1; j <= 20; j++) read_byte(dbf); /* field descriptor array */ xassert(dbf->nf == 0); for (;;) { /* check for end of array */ b = read_byte(dbf); if (b == 0x0D) break; if (dbf->nf == DBF_FIELD_MAX) { xprintf("%s:0x%X: too many fields\n", dbf->fname, dbf->offset); longjmp(dbf->jump, 0); } dbf->nf++; /* field name */ name[0] = (char)b; for (j = 1; j < 10; j++) { b = read_byte(dbf); name[j] = (char)b; } name[10] = '\0'; b = read_byte(dbf); if (b != 0x00) { xprintf("%s:0x%X: invalid field name\n", dbf->fname, dbf->offset); longjmp(dbf->jump, 0); } /* find corresponding field in the table statement */ for (k = mpl_tab_num_flds(dca); k >= 1; k--) if (strcmp(mpl_tab_get_name(dca, k), name) == 0) break; dbf->ref[dbf->nf] = k; /* field type */ b = read_byte(dbf); if (!(b == 'C' || b == 'N')) { xprintf("%s:0x%X: invalid field type\n", dbf->fname, dbf->offset); longjmp(dbf->jump, 0); } dbf->type[dbf->nf] = b; /* (ignored) */ for (j = 1; j <= 4; j++) read_byte(dbf); /* field length */ b = read_byte(dbf); if (b == 0) { xprintf("%s:0x%X: invalid field length\n", dbf->fname, dbf->offset); longjmp(dbf->jump, 0); } if (b > DBF_FDLEN_MAX) { xprintf("%s:0x%X: field too long\n", dbf->fname, dbf->offset); longjmp(dbf->jump, 0); } dbf->len[dbf->nf] = b; recl -= b; /* (ignored) */ for (j = 1; j <= 15; j++) read_byte(dbf); } if (recl != 1) { xprintf("%s:0x%X: invalid file header\n", dbf->fname, dbf->offset); longjmp(dbf->jump, 0); } /* find dummy RECNO field in the table statement */ for (k = mpl_tab_num_flds(dca); k >= 1; k--) if (strcmp(mpl_tab_get_name(dca, k), "RECNO") == 0) break; dbf->ref[0] = k; return; }
static struct csv *csv_open_file(TABDCA *dca, int mode) { /* open csv data file */ struct csv *csv; /* create control structure */ csv = xmalloc(sizeof(struct csv)); csv->mode = mode; csv->fname = NULL; csv->fp = NULL; if (setjmp(csv->jump)) goto fail; csv->count = 0; csv->c = '\n'; csv->what = 0; csv->field[0] = '\0'; csv->nf = 0; /* try to open the csv data file */ if (mpl_tab_num_args(dca) < 2) { xprintf("csv_driver: file name not specified\n"); longjmp(csv->jump, 0); } csv->fname = xmalloc(strlen(mpl_tab_get_arg(dca, 2))+1); strcpy(csv->fname, mpl_tab_get_arg(dca, 2)); if (mode == 'R') { /* open the file for reading */ int k; csv->fp = fopen(csv->fname, "r"); if (csv->fp == NULL) { xprintf("csv_driver: unable to open %s - %s\n", csv->fname, strerror(errno)); longjmp(csv->jump, 0); } #if 1 /* 01/VI-2010 */ csv->nskip = 0; #endif /* skip fake new-line */ read_field(csv); xassert(csv->what == CSV_EOR); /* read field names */ xassert(csv->nf == 0); for (;;) { read_field(csv); if (csv->what == CSV_EOR) break; if (csv->what != CSV_STR) { xprintf("%s:%d: invalid field name\n", csv->fname, csv->count); longjmp(csv->jump, 0); } if (csv->nf == CSV_FIELD_MAX) { xprintf("%s:%d: too many fields\n", csv->fname, csv->count); longjmp(csv->jump, 0); } csv->nf++; /* find corresponding field in the table statement */ for (k = mpl_tab_num_flds(dca); k >= 1; k--) { if (strcmp(mpl_tab_get_name(dca, k), csv->field) == 0) break; } csv->ref[csv->nf] = k; } /* find dummy RECNO field in the table statement */ for (k = mpl_tab_num_flds(dca); k >= 1; k--) if (strcmp(mpl_tab_get_name(dca, k), "RECNO") == 0) break; csv->ref[0] = k; } else if (mode == 'W') { /* open the file for writing */ int k, nf; csv->fp = fopen(csv->fname, "w"); if (csv->fp == NULL) { xprintf("csv_driver: unable to create %s - %s\n", csv->fname, strerror(errno)); longjmp(csv->jump, 0); } /* write field names */ nf = mpl_tab_num_flds(dca); for (k = 1; k <= nf; k++) fprintf(csv->fp, "%s%c", mpl_tab_get_name(dca, k), k < nf ? ',' : '\n'); csv->count++; } else xassert(mode != mode); /* the file has been open */ return csv; fail: /* the file cannot be open */ if (csv->fname != NULL) xfree(csv->fname); if (csv->fp != NULL) fclose(csv->fp); xfree(csv); return NULL; }
static void *db_iodbc_open_int(TABDCA *dca, int mode, const char **sqllines) { struct db_odbc *sql; SQLRETURN ret; SQLCHAR FAR *dsn; SQLCHAR info[256]; SQLSMALLINT colnamelen; SQLSMALLINT nullable; SQLSMALLINT scale; const char *arg; int narg; int i, j; int total; if (libodbc == NULL) { xprintf("No loader for shared ODBC library available\n"); return NULL; } if (h_odbc == NULL) { h_odbc = xdlopen(libodbc); if (h_odbc == NULL) { xprintf("unable to open library %s\n", libodbc); xprintf("%s\n", xerrmsg()); return NULL; } } sql = (struct db_odbc *) xmalloc(sizeof(struct db_odbc)); if (sql == NULL) return NULL; sql->mode = mode; sql->hdbc = NULL; sql->henv = NULL; sql->hstmt = NULL; sql->query = NULL; narg = mpl_tab_num_args(dca); dsn = (SQLCHAR FAR *) mpl_tab_get_arg(dca, 2); /* allocate an environment handle */ ret = dl_SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &(sql->henv)); /* set attribute to enable application to run as ODBC 3.0 application */ ret = dl_SQLSetEnvAttr(sql->henv, SQL_ATTR_ODBC_VERSION, (void *) SQL_OV_ODBC3, 0); /* allocate a connection handle */ ret = dl_SQLAllocHandle(SQL_HANDLE_DBC, sql->henv, &(sql->hdbc)); /* connect */ ret = dl_SQLDriverConnect(sql->hdbc, NULL, dsn, SQL_NTS, NULL, 0, NULL, SQL_DRIVER_COMPLETE); if (SQL_SUCCEEDED(ret)) { /* output information about data base connection */ xprintf("Connected to "); dl_SQLGetInfo(sql->hdbc, SQL_DBMS_NAME, (SQLPOINTER)info, sizeof(info), NULL); xprintf("%s ", info); dl_SQLGetInfo(sql->hdbc, SQL_DBMS_VER, (SQLPOINTER)info, sizeof(info), NULL); xprintf("%s - ", info); dl_SQLGetInfo(sql->hdbc, SQL_DATABASE_NAME, (SQLPOINTER)info, sizeof(info), NULL); xprintf("%s\n", info); } else { /* describe error */ xprintf("Failed to connect\n"); extract_error("SQLDriverConnect", sql->hdbc, SQL_HANDLE_DBC); dl_SQLFreeHandle(SQL_HANDLE_DBC, sql->hdbc); dl_SQLFreeHandle(SQL_HANDLE_ENV, sql->henv); xfree(sql); return NULL; } /* set AUTOCOMMIT on*/ ret = dl_SQLSetConnectAttr(sql->hdbc, SQL_ATTR_AUTOCOMMIT, (SQLPOINTER)SQL_AUTOCOMMIT_ON, 0); /* allocate a statement handle */ ret = dl_SQLAllocHandle(SQL_HANDLE_STMT, sql->hdbc, &(sql->hstmt)); /* initialization queries */ for(j = 0; sqllines[j+1] != NULL; j++) { sql->query = (SQLCHAR *) sqllines[j]; xprintf("%s\n", sql->query); ret = dl_SQLExecDirect(sql->hstmt, sql->query, SQL_NTS); switch (ret) { case SQL_SUCCESS: case SQL_SUCCESS_WITH_INFO: case SQL_NO_DATA_FOUND: break; default: xprintf("db_iodbc_open: Query\n\"%s\"\nfailed.\n", sql->query); extract_error("SQLExecDirect", sql->hstmt, SQL_HANDLE_STMT); dl_SQLFreeHandle(SQL_HANDLE_STMT, sql->hstmt); dl_SQLDisconnect(sql->hdbc); dl_SQLFreeHandle(SQL_HANDLE_DBC, sql->hdbc); dl_SQLFreeHandle(SQL_HANDLE_ENV, sql->henv); xfree(sql); return NULL; } /* commit statement */ dl_SQLEndTran(SQL_HANDLE_ENV, sql->henv, SQL_COMMIT); } if ( sql->mode == 'R' ) { sql->nf = mpl_tab_num_flds(dca); for(j = 0; sqllines[j] != NULL; j++) arg = sqllines[j]; total = strlen(arg); if (total > 7 && 0 == strncmp(arg, "SELECT ", 7)) { total = strlen(arg); sql->query = xmalloc( (total+1) * sizeof(char)); strcpy (sql->query, arg); } else { sql->query = db_generate_select_stmt(dca); } xprintf("%s\n", sql->query); if (dl_SQLExecDirect(sql->hstmt, sql->query, SQL_NTS) != SQL_SUCCESS) { xprintf("db_iodbc_open: Query\n\"%s\"\nfailed.\n", sql->query); extract_error("SQLExecDirect", sql->hstmt, SQL_HANDLE_STMT); dl_SQLFreeHandle(SQL_HANDLE_STMT, sql->hstmt); dl_SQLDisconnect(sql->hdbc); dl_SQLFreeHandle(SQL_HANDLE_DBC, sql->hdbc); dl_SQLFreeHandle(SQL_HANDLE_ENV, sql->henv); xfree(sql->query); xfree(sql); return NULL; } xfree(sql->query); /* determine number of result columns */ ret = dl_SQLNumResultCols(sql->hstmt, &sql->nresultcols); total = sql->nresultcols; if (total > SQL_FIELD_MAX) { xprintf("db_iodbc_open: Too many fields (> %d) in query.\n" "\"%s\"\n", SQL_FIELD_MAX, sql->query); dl_SQLFreeHandle(SQL_HANDLE_STMT, sql->hstmt); dl_SQLDisconnect(sql->hdbc); dl_SQLFreeHandle(SQL_HANDLE_DBC, sql->hdbc); dl_SQLFreeHandle(SQL_HANDLE_ENV, sql->henv); xfree(sql->query); return NULL; } for (i = 1; i <= total; i++) { /* return a set of attributes for a column */ ret = dl_SQLDescribeCol(sql->hstmt, (SQLSMALLINT) i, sql->colname[i], SQL_FDLEN_MAX, &colnamelen, &(sql->coltype[i]), &(sql->collen[i]), &scale, &nullable); sql->isnumeric[i] = is_numeric(sql->coltype[i]); /* bind columns to program vars, converting all types to CHAR*/ if (sql->isnumeric[i]) { dl_SQLBindCol(sql->hstmt, i, SQL_DOUBLE, sql->data[i], SQL_FDLEN_MAX, &(sql->outlen[i])); } else { dl_SQLBindCol(sql->hstmt, i, SQL_CHAR, sql->data[i], SQL_FDLEN_MAX, &(sql->outlen[i])); } for (j = sql->nf; j >= 1; j--) { if (strcmp(mpl_tab_get_name(dca, j), sql->colname[i]) == 0) break; } sql->ref[i] = j; } } else if ( sql->mode == 'W' ) { for(j = 0; sqllines[j] != NULL; j++) arg = sqllines[j]; if ( NULL != strchr(arg, '?') ) { total = strlen(arg); sql->query = xmalloc( (total+1) * sizeof(char)); strcpy (sql->query, arg); } else { sql->query = db_generate_insert_stmt(dca); } xprintf("%s\n", sql->query); } return sql; }
char *query; char *template; char num[50]; int k; int len; int nf; sql = (struct db_odbc *) link; xassert(sql != NULL); xassert(sql->mode == 'W'); len = strlen(sql->query); template = (char *) xmalloc( (len + 1) * sizeof(char) ); strcpy(template, sql->query); nf = mpl_tab_num_flds(dca); for (k = 1; k <= nf; k++) { switch (mpl_tab_get_type(dca, k)) { case 'N': len += 20; break; case 'S': len += db_escaped_string_length(mpl_tab_get_str(dca, k)); len += 2; break; default: xassert(dca != dca); } } query = xmalloc( (len + 1 ) * sizeof(char) ); query[0] = 0x00;