mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-08-10 16:53:23 +02:00
72a5db15d1
patch adds missing checks to the call sites of malloc(), strdup(), PQmakeEmptyPGresult(), pqResultAlloc(), and pqResultStrdup(), and updates the documentation. Per original report from Volkan Yazici about PQmakeEmptyPGresult() not checking for malloc() failure.
771 lines
16 KiB
C
771 lines
16 KiB
C
/*-------------------------------------------------------------------------
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*
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* fe-print.c
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* functions for pretty-printing query results
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*
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* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* These functions were formerly part of fe-exec.c, but they
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* didn't really belong there.
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/interfaces/libpq/fe-print.c,v 1.60 2005/06/12 00:00:21 neilc Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres_fe.h"
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#include <signal.h>
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#ifdef WIN32
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#include "win32.h"
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#else
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#include <unistd.h>
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#include <sys/ioctl.h>
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#endif
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#ifdef HAVE_TERMIOS_H
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#include <termios.h>
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#else
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#ifndef WIN32
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#include <sys/termios.h>
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#endif
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#endif
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#include "libpq-fe.h"
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#include "libpq-int.h"
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#include "pqsignal.h"
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static void do_field(const PQprintOpt *po, const PGresult *res,
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const int i, const int j, const int fs_len,
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char **fields,
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const int nFields, const char **fieldNames,
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unsigned char *fieldNotNum, int *fieldMax,
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const int fieldMaxLen, FILE *fout);
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static char *do_header(FILE *fout, const PQprintOpt *po, const int nFields,
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int *fieldMax, const char **fieldNames, unsigned char *fieldNotNum,
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const int fs_len, const PGresult *res);
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static void output_row(FILE *fout, const PQprintOpt *po, const int nFields, char **fields,
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unsigned char *fieldNotNum, int *fieldMax, char *border,
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const int row_index);
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static void fill(int length, int max, char filler, FILE *fp);
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/*
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* PQprint()
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*
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* Format results of a query for printing.
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*
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* PQprintOpt is a typedef (structure) that containes
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* various flags and options. consult libpq-fe.h for
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* details
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*
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* This function should probably be removed sometime since psql
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* doesn't use it anymore. It is unclear to what extent this is used
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* by external clients, however.
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*/
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void
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PQprint(FILE *fout, const PGresult *res, const PQprintOpt *po)
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{
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int nFields;
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nFields = PQnfields(res);
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if (nFields > 0)
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{ /* only print rows with at least 1 field. */
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int i,
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j;
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int nTups;
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int *fieldMax = NULL; /* in case we don't use them */
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unsigned char *fieldNotNum = NULL;
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char *border = NULL;
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char **fields = NULL;
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const char **fieldNames;
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int fieldMaxLen = 0;
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int numFieldName;
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int fs_len = strlen(po->fieldSep);
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int total_line_length = 0;
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int usePipe = 0;
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char *pagerenv;
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#ifdef ENABLE_THREAD_SAFETY
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sigset_t osigset;
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bool sigpipe_masked = false;
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bool sigpipe_pending;
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#endif
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#if !defined(ENABLE_THREAD_SAFETY) && !defined(WIN32)
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pqsigfunc oldsigpipehandler = NULL;
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#endif
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#ifdef TIOCGWINSZ
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struct winsize screen_size;
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#else
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struct winsize
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{
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int ws_row;
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int ws_col;
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} screen_size;
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#endif
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nTups = PQntuples(res);
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if (!(fieldNames = (const char **) calloc(nFields, sizeof(char *))))
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{
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fprintf(stderr, libpq_gettext("out of memory\n"));
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exit(1);
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}
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if (!(fieldNotNum = (unsigned char *) calloc(nFields, 1)))
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{
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fprintf(stderr, libpq_gettext("out of memory\n"));
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exit(1);
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}
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if (!(fieldMax = (int *) calloc(nFields, sizeof(int))))
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{
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fprintf(stderr, libpq_gettext("out of memory\n"));
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exit(1);
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}
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for (numFieldName = 0;
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po->fieldName && po->fieldName[numFieldName];
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numFieldName++)
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;
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for (j = 0; j < nFields; j++)
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{
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int len;
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const char *s = (j < numFieldName && po->fieldName[j][0]) ?
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po->fieldName[j] : PQfname(res, j);
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fieldNames[j] = s;
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len = s ? strlen(s) : 0;
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fieldMax[j] = len;
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len += fs_len;
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if (len > fieldMaxLen)
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fieldMaxLen = len;
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total_line_length += len;
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}
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total_line_length += nFields * strlen(po->fieldSep) + 1;
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if (fout == NULL)
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fout = stdout;
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if (po->pager && fout == stdout
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#ifndef WIN32
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&&
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isatty(fileno(stdin)) &&
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isatty(fileno(stdout))
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#endif
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)
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{
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/*
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* If we think there'll be more than one screen of output, try
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* to pipe to the pager program.
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*/
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#ifdef TIOCGWINSZ
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if (ioctl(fileno(stdout), TIOCGWINSZ, &screen_size) == -1 ||
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screen_size.ws_col == 0 ||
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screen_size.ws_row == 0)
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{
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screen_size.ws_row = 24;
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screen_size.ws_col = 80;
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}
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#else
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screen_size.ws_row = 24;
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screen_size.ws_col = 80;
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#endif
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pagerenv = getenv("PAGER");
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if (pagerenv != NULL &&
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pagerenv[0] != '\0' &&
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!po->html3 &&
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((po->expanded &&
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nTups * (nFields + 1) >= screen_size.ws_row) ||
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(!po->expanded &&
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nTups * (total_line_length / screen_size.ws_col + 1) *
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(1 + (po->standard != 0)) >= screen_size.ws_row -
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(po->header != 0) *
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(total_line_length / screen_size.ws_col + 1) * 2
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- (po->header != 0) * 2 /* row count and newline */
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)))
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{
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fout = popen(pagerenv, "w");
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if (fout)
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{
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usePipe = 1;
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#ifdef ENABLE_THREAD_SAFETY
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if (pq_block_sigpipe(&osigset, &sigpipe_pending) == 0)
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sigpipe_masked = true;
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#else
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#ifndef WIN32
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oldsigpipehandler = pqsignal(SIGPIPE, SIG_IGN);
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#endif
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#endif
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}
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else
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fout = stdout;
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}
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}
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if (!po->expanded && (po->align || po->html3))
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{
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if (!(fields = (char **) calloc(nFields * (nTups + 1), sizeof(char *))))
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{
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fprintf(stderr, libpq_gettext("out of memory\n"));
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exit(1);
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}
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}
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else if (po->header && !po->html3)
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{
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if (po->expanded)
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{
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if (po->align)
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fprintf(fout, libpq_gettext("%-*s%s Value\n"),
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fieldMaxLen - fs_len, libpq_gettext("Field"), po->fieldSep);
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else
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fprintf(fout, libpq_gettext("%s%sValue\n"), libpq_gettext("Field"), po->fieldSep);
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}
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else
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{
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int len = 0;
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for (j = 0; j < nFields; j++)
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{
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const char *s = fieldNames[j];
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fputs(s, fout);
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len += strlen(s) + fs_len;
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if ((j + 1) < nFields)
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fputs(po->fieldSep, fout);
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}
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fputc('\n', fout);
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for (len -= fs_len; len--; fputc('-', fout));
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fputc('\n', fout);
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}
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}
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if (po->expanded && po->html3)
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{
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if (po->caption)
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fprintf(fout, "<centre><h2>%s</h2></centre>\n", po->caption);
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else
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fprintf(fout,
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"<centre><h2>"
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"Query retrieved %d rows * %d fields"
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"</h2></centre>\n",
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nTups, nFields);
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}
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for (i = 0; i < nTups; i++)
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{
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if (po->expanded)
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{
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if (po->html3)
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fprintf(fout,
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"<table %s><caption align=high>%d</caption>\n",
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po->tableOpt ? po->tableOpt : "", i);
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else
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fprintf(fout, libpq_gettext("-- RECORD %d --\n"), i);
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}
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for (j = 0; j < nFields; j++)
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do_field(po, res, i, j, fs_len, fields, nFields,
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fieldNames, fieldNotNum,
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fieldMax, fieldMaxLen, fout);
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if (po->html3 && po->expanded)
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fputs("</table>\n", fout);
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}
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if (!po->expanded && (po->align || po->html3))
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{
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if (po->html3)
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{
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if (po->header)
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{
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if (po->caption)
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fprintf(fout,
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"<table %s><caption align=high>%s</caption>\n",
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po->tableOpt ? po->tableOpt : "",
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po->caption);
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else
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fprintf(fout,
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"<table %s><caption align=high>"
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"Retrieved %d rows * %d fields"
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"</caption>\n",
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po->tableOpt ? po->tableOpt : "", nTups, nFields);
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}
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else
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fprintf(fout, "<table %s>", po->tableOpt ? po->tableOpt : "");
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}
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if (po->header)
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border = do_header(fout, po, nFields, fieldMax, fieldNames,
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fieldNotNum, fs_len, res);
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for (i = 0; i < nTups; i++)
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output_row(fout, po, nFields, fields,
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fieldNotNum, fieldMax, border, i);
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free(fields);
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if (border)
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free(border);
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}
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if (po->header && !po->html3)
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fprintf(fout, "(%d row%s)\n\n", PQntuples(res),
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(PQntuples(res) == 1) ? "" : "s");
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free(fieldMax);
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free(fieldNotNum);
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free((void *) fieldNames);
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if (usePipe)
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{
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#ifdef WIN32
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_pclose(fout);
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#else
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pclose(fout);
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#endif
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#ifdef ENABLE_THREAD_SAFETY
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/* we can't easily verify if EPIPE occurred, so say it did */
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if (sigpipe_masked)
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pq_reset_sigpipe(&osigset, sigpipe_pending, true);
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#else
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#ifndef WIN32
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pqsignal(SIGPIPE, oldsigpipehandler);
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#endif
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#endif
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}
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if (po->html3 && !po->expanded)
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fputs("</table>\n", fout);
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}
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}
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static void
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do_field(const PQprintOpt *po, const PGresult *res,
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const int i, const int j, const int fs_len,
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char **fields,
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const int nFields, char const ** fieldNames,
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unsigned char *fieldNotNum, int *fieldMax,
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const int fieldMaxLen, FILE *fout)
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{
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const char *pval,
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*p;
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int plen;
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bool skipit;
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plen = PQgetlength(res, i, j);
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pval = PQgetvalue(res, i, j);
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if (plen < 1 || !pval || !*pval)
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{
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if (po->align || po->expanded)
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skipit = true;
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else
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{
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skipit = false;
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goto efield;
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}
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}
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else
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skipit = false;
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if (!skipit)
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{
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if (po->align && !fieldNotNum[j])
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{
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/* Detect whether field contains non-numeric data */
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char ch = '0';
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for (p = pval; *p; p += PQmblen(p, res->client_encoding))
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{
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ch = *p;
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if (!((ch >= '0' && ch <= '9') ||
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ch == '.' ||
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ch == 'E' ||
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ch == 'e' ||
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ch == ' ' ||
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ch == '-'))
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{
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fieldNotNum[j] = 1;
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break;
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}
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}
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/*
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* Above loop will believe E in first column is numeric; also,
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* we insist on a digit in the last column for a numeric. This
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* test is still not bulletproof but it handles most cases.
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*/
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if (*pval == 'E' || *pval == 'e' ||
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!(ch >= '0' && ch <= '9'))
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fieldNotNum[j] = 1;
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}
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if (!po->expanded && (po->align || po->html3))
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{
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if (plen > fieldMax[j])
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fieldMax[j] = plen;
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if (!(fields[i * nFields + j] = (char *) malloc(plen + 1)))
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{
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fprintf(stderr, libpq_gettext("out of memory\n"));
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exit(1);
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}
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strcpy(fields[i * nFields + j], pval);
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}
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else
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{
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if (po->expanded)
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{
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if (po->html3)
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fprintf(fout,
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"<tr><td align=left><b>%s</b></td>"
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"<td align=%s>%s</td></tr>\n",
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fieldNames[j],
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fieldNotNum[j] ? "left" : "right",
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pval);
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else
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{
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if (po->align)
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fprintf(fout,
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"%-*s%s %s\n",
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fieldMaxLen - fs_len, fieldNames[j],
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po->fieldSep,
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pval);
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else
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fprintf(fout,
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"%s%s%s\n",
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fieldNames[j], po->fieldSep, pval);
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}
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}
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else
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{
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if (!po->html3)
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{
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fputs(pval, fout);
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efield:
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if ((j + 1) < nFields)
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fputs(po->fieldSep, fout);
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else
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fputc('\n', fout);
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}
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}
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}
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}
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}
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static char *
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do_header(FILE *fout, const PQprintOpt *po, const int nFields, int *fieldMax,
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const char **fieldNames, unsigned char *fieldNotNum,
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const int fs_len, const PGresult *res)
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{
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int j; /* for loop index */
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char *border = NULL;
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if (po->html3)
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fputs("<tr>", fout);
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else
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{
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int tot = 0;
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int n = 0;
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char *p = NULL;
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for (; n < nFields; n++)
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tot += fieldMax[n] + fs_len + (po->standard ? 2 : 0);
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if (po->standard)
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tot += fs_len * 2 + 2;
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border = malloc(tot + 1);
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if (!border)
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{
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fprintf(stderr, libpq_gettext("out of memory\n"));
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exit(1);
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}
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p = border;
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if (po->standard)
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{
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char *fs = po->fieldSep;
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while (*fs++)
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*p++ = '+';
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}
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for (j = 0; j < nFields; j++)
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{
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int len;
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for (len = fieldMax[j] + (po->standard ? 2 : 0); len--; *p++ = '-');
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if (po->standard || (j + 1) < nFields)
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{
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char *fs = po->fieldSep;
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while (*fs++)
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*p++ = '+';
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}
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}
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*p = '\0';
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if (po->standard)
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fprintf(fout, "%s\n", border);
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}
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if (po->standard)
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fputs(po->fieldSep, fout);
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for (j = 0; j < nFields; j++)
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{
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const char *s = PQfname(res, j);
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if (po->html3)
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{
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fprintf(fout, "<th align=%s>%s</th>",
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fieldNotNum[j] ? "left" : "right", fieldNames[j]);
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}
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else
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{
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int n = strlen(s);
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if (n > fieldMax[j])
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fieldMax[j] = n;
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if (po->standard)
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fprintf(fout,
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fieldNotNum[j] ? " %-*s " : " %*s ",
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fieldMax[j], s);
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else
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fprintf(fout, fieldNotNum[j] ? "%-*s" : "%*s", fieldMax[j], s);
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if (po->standard || (j + 1) < nFields)
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fputs(po->fieldSep, fout);
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}
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}
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if (po->html3)
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fputs("</tr>\n", fout);
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else
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fprintf(fout, "\n%s\n", border);
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return border;
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}
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static void
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output_row(FILE *fout, const PQprintOpt *po, const int nFields, char **fields,
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unsigned char *fieldNotNum, int *fieldMax, char *border,
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const int row_index)
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{
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|
|
|
int field_index; /* for loop index */
|
|
|
|
if (po->html3)
|
|
fputs("<tr>", fout);
|
|
else if (po->standard)
|
|
fputs(po->fieldSep, fout);
|
|
for (field_index = 0; field_index < nFields; field_index++)
|
|
{
|
|
char *p = fields[row_index * nFields + field_index];
|
|
|
|
if (po->html3)
|
|
fprintf(fout, "<td align=%s>%s</td>",
|
|
fieldNotNum[field_index] ? "left" : "right", p ? p : "");
|
|
else
|
|
{
|
|
fprintf(fout,
|
|
fieldNotNum[field_index] ?
|
|
(po->standard ? " %-*s " : "%-*s") :
|
|
(po->standard ? " %*s " : "%*s"),
|
|
fieldMax[field_index],
|
|
p ? p : "");
|
|
if (po->standard || field_index + 1 < nFields)
|
|
fputs(po->fieldSep, fout);
|
|
}
|
|
if (p)
|
|
free(p);
|
|
}
|
|
if (po->html3)
|
|
fputs("</tr>", fout);
|
|
else if (po->standard)
|
|
fprintf(fout, "\n%s", border);
|
|
fputc('\n', fout);
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* really old printing routines
|
|
*/
|
|
|
|
void
|
|
PQdisplayTuples(const PGresult *res,
|
|
FILE *fp, /* where to send the output */
|
|
int fillAlign, /* pad the fields with spaces */
|
|
const char *fieldSep, /* field separator */
|
|
int printHeader, /* display headers? */
|
|
int quiet
|
|
)
|
|
{
|
|
#define DEFAULT_FIELD_SEP " "
|
|
|
|
int i,
|
|
j;
|
|
int nFields;
|
|
int nTuples;
|
|
int *fLength = NULL;
|
|
|
|
if (fieldSep == NULL)
|
|
fieldSep = DEFAULT_FIELD_SEP;
|
|
|
|
/* Get some useful info about the results */
|
|
nFields = PQnfields(res);
|
|
nTuples = PQntuples(res);
|
|
|
|
if (fp == NULL)
|
|
fp = stdout;
|
|
|
|
/* Figure the field lengths to align to */
|
|
/* will be somewhat time consuming for very large results */
|
|
if (fillAlign)
|
|
{
|
|
fLength = (int *) malloc(nFields * sizeof(int));
|
|
if (!fLength)
|
|
{
|
|
fprintf(stderr, libpq_gettext("out of memory\n"));
|
|
exit(1);
|
|
}
|
|
|
|
for (j = 0; j < nFields; j++)
|
|
{
|
|
fLength[j] = strlen(PQfname(res, j));
|
|
for (i = 0; i < nTuples; i++)
|
|
{
|
|
int flen = PQgetlength(res, i, j);
|
|
|
|
if (flen > fLength[j])
|
|
fLength[j] = flen;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (printHeader)
|
|
{
|
|
/* first, print out the attribute names */
|
|
for (i = 0; i < nFields; i++)
|
|
{
|
|
fputs(PQfname(res, i), fp);
|
|
if (fillAlign)
|
|
fill(strlen(PQfname(res, i)), fLength[i], ' ', fp);
|
|
fputs(fieldSep, fp);
|
|
}
|
|
fprintf(fp, "\n");
|
|
|
|
/* Underline the attribute names */
|
|
for (i = 0; i < nFields; i++)
|
|
{
|
|
if (fillAlign)
|
|
fill(0, fLength[i], '-', fp);
|
|
fputs(fieldSep, fp);
|
|
}
|
|
fprintf(fp, "\n");
|
|
}
|
|
|
|
/* next, print out the instances */
|
|
for (i = 0; i < nTuples; i++)
|
|
{
|
|
for (j = 0; j < nFields; j++)
|
|
{
|
|
fprintf(fp, "%s", PQgetvalue(res, i, j));
|
|
if (fillAlign)
|
|
fill(strlen(PQgetvalue(res, i, j)), fLength[j], ' ', fp);
|
|
fputs(fieldSep, fp);
|
|
}
|
|
fprintf(fp, "\n");
|
|
}
|
|
|
|
if (!quiet)
|
|
fprintf(fp, "\nQuery returned %d row%s.\n", PQntuples(res),
|
|
(PQntuples(res) == 1) ? "" : "s");
|
|
|
|
fflush(fp);
|
|
|
|
if (fLength)
|
|
free(fLength);
|
|
}
|
|
|
|
|
|
|
|
void
|
|
PQprintTuples(const PGresult *res,
|
|
FILE *fout, /* output stream */
|
|
int PrintAttNames, /* print attribute names or not */
|
|
int TerseOutput, /* delimiter bars or not? */
|
|
int colWidth /* width of column, if 0, use variable
|
|
* width */
|
|
)
|
|
{
|
|
int nFields;
|
|
int nTups;
|
|
int i,
|
|
j;
|
|
char formatString[80];
|
|
|
|
char *tborder = NULL;
|
|
|
|
nFields = PQnfields(res);
|
|
nTups = PQntuples(res);
|
|
|
|
if (colWidth > 0)
|
|
sprintf(formatString, "%%s %%-%ds", colWidth);
|
|
else
|
|
sprintf(formatString, "%%s %%s");
|
|
|
|
if (nFields > 0)
|
|
{ /* only print rows with at least 1 field. */
|
|
|
|
if (!TerseOutput)
|
|
{
|
|
int width;
|
|
|
|
width = nFields * 14;
|
|
tborder = malloc(width + 1);
|
|
if (!tborder)
|
|
{
|
|
fprintf(stderr, libpq_gettext("out of memory\n"));
|
|
exit(1);
|
|
}
|
|
for (i = 0; i <= width; i++)
|
|
tborder[i] = '-';
|
|
tborder[i] = '\0';
|
|
fprintf(fout, "%s\n", tborder);
|
|
}
|
|
|
|
for (i = 0; i < nFields; i++)
|
|
{
|
|
if (PrintAttNames)
|
|
{
|
|
fprintf(fout, formatString,
|
|
TerseOutput ? "" : "|",
|
|
PQfname(res, i));
|
|
}
|
|
}
|
|
|
|
if (PrintAttNames)
|
|
{
|
|
if (TerseOutput)
|
|
fprintf(fout, "\n");
|
|
else
|
|
fprintf(fout, "|\n%s\n", tborder);
|
|
}
|
|
|
|
for (i = 0; i < nTups; i++)
|
|
{
|
|
for (j = 0; j < nFields; j++)
|
|
{
|
|
const char *pval = PQgetvalue(res, i, j);
|
|
|
|
fprintf(fout, formatString,
|
|
TerseOutput ? "" : "|",
|
|
pval ? pval : "");
|
|
}
|
|
if (TerseOutput)
|
|
fprintf(fout, "\n");
|
|
else
|
|
fprintf(fout, "|\n%s\n", tborder);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/* simply send out max-length number of filler characters to fp */
|
|
|
|
static void
|
|
fill(int length, int max, char filler, FILE *fp)
|
|
{
|
|
int count;
|
|
|
|
count = max - length;
|
|
while (count-- >= 0)
|
|
putc(filler, fp);
|
|
}
|