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More zic cleanup.

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The workaround the IANA guys chose to get rid of the clang warning
we'd silenced in commit 23ed2ba81 turns out not to satisfy Coverity.
Go back to the previous solution, ie, remove the useless comparison
to SIZE_MAX.  (In principle, there could be machines out there where
it's not useless because ptrdiff_t is wider than size_t.  But the whole
thing is pretty academic anyway, as we could never approach this limit
for any sane estimate of the amount of data that zic will ever be asked
to work with.)

Also, s/lineno/lineno_t/g, because if we accept their decision to start
using "lineno" as a typedef, it is going to have very unpleasant
consequences in our next pgindent run.  Noted that while fooling with
pltcl yesterday.
This commit is contained in:
Tom Lane
2016-11-06 10:45:58 -05:00
parent 22b1207a33
commit 3a8f24abdf
1 changed files with 11 additions and 12 deletions
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23
src/timezone/zic.c
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@@ -57,13 +57,13 @@ static ptrdiff_t const PTRDIFF_MAX = MAXVAL(ptrdiff_t, TYPE_BIT(ptrdiff_t));
#endif #endif
/* The type and printf format for line numbers. */ /* The type and printf format for line numbers. */
typedef int lineno; typedef int lineno_t;
#define PRIdLINENO "d" #define PRIdLINENO "d"
struct rule struct rule
{ {
const char *r_filename; const char *r_filename;
lineno r_linenum; lineno_t r_linenum;
const char *r_name; const char *r_name;
zic_t r_loyear; /* for example, 1986 */ zic_t r_loyear; /* for example, 1986 */
@@ -100,7 +100,7 @@ struct rule
struct zone struct zone
{ {
const char *z_filename; const char *z_filename;
lineno z_linenum; lineno_t z_linenum;
const char *z_name; const char *z_name;
zic_t z_gmtoff; zic_t z_gmtoff;
@@ -181,7 +181,7 @@ static int leapcnt;
static bool leapseen; static bool leapseen;
static zic_t leapminyear; static zic_t leapminyear;
static zic_t leapmaxyear; static zic_t leapmaxyear;
static lineno linenum; static lineno_t linenum;
static int max_abbrvar_len = PERCENT_Z_LEN_BOUND; static int max_abbrvar_len = PERCENT_Z_LEN_BOUND;
static int max_format_len; static int max_format_len;
static zic_t max_year; static zic_t max_year;
@@ -190,7 +190,7 @@ static bool noise;
static bool print_abbrevs; static bool print_abbrevs;
static zic_t print_cutoff; static zic_t print_cutoff;
static const char *rfilename; static const char *rfilename;
static lineno rlinenum; static lineno_t rlinenum;
static const char *progname; static const char *progname;
static ptrdiff_t timecnt; static ptrdiff_t timecnt;
static ptrdiff_t timecnt_alloc; static ptrdiff_t timecnt_alloc;
@@ -288,7 +288,7 @@ static ptrdiff_t nzones_alloc;
struct link struct link
{ {
const char *l_filename; const char *l_filename;
lineno l_linenum; lineno_t l_linenum;
const char *l_from; const char *l_from;
const char *l_to; const char *l_to;
}; };
@@ -442,14 +442,13 @@ ecpyalloc(char const * str)
} }
static void * static void *
growalloc(void *ptr, size_t itemsize, ptrdiff_t nitems, ptrdiff_t * nitems_alloc) growalloc(void *ptr, size_t itemsize, ptrdiff_t nitems, ptrdiff_t *nitems_alloc)
{ {
if (nitems < *nitems_alloc) if (nitems < *nitems_alloc)
return ptr; return ptr;
else else
{ {
ptrdiff_t nitems_max = PTRDIFF_MAX - WORK_AROUND_QTBUG_53071; ptrdiff_t amax = PTRDIFF_MAX - WORK_AROUND_QTBUG_53071;
ptrdiff_t amax = nitems_max < SIZE_MAX ? nitems_max : SIZE_MAX;
if ((amax - 1) / 3 * 2 < *nitems_alloc) if ((amax - 1) / 3 * 2 < *nitems_alloc)
memory_exhausted(_("integer overflow")); memory_exhausted(_("integer overflow"));
@@ -463,7 +462,7 @@ growalloc(void *ptr, size_t itemsize, ptrdiff_t nitems, ptrdiff_t * nitems_alloc
*/ */
static void static void
eats(char const * name, lineno num, char const * rname, lineno rnum) eats(char const * name, lineno_t num, char const * rname, lineno_t rnum)
{ {
filename = name; filename = name;
linenum = num; linenum = num;
@@ -472,7 +471,7 @@ eats(char const * name, lineno num, char const * rname, lineno rnum)
} }
static void static void
eat(char const * name, lineno num) eat(char const * name, lineno_t num)
{ {
eats(name, num, NULL, -1); eats(name, num, NULL, -1);
} }
@@ -1169,7 +1168,7 @@ infile(const char *name)
const struct lookup *lp; const struct lookup *lp;
int nfields; int nfields;
bool wantcont; bool wantcont;
lineno num; lineno_t num;
char buf[BUFSIZ]; char buf[BUFSIZ];
if (strcmp(name, "-") == 0) if (strcmp(name, "-") == 0)