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Less rigid field separators, support comments:

Browse source 
(skipfs): New.
(xuflds, xundump): Use it.  Update field scanf stop-sets accordingly.
(xuflds): Update test for good field separator.

(xundump): Fail silently if nothing can be read and no specific table
is expected.
This commit is contained in:
Markus Armbruster 2005-12-03 11:04:44 +00:00
parent 8ca219819c
commit 0a7291eb37
1 changed files with 34 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

45
src/lib/common/xundump.c
View file

@ -85,6 +85,24 @@ gripe(char *fmt, ...)
return -1;
}
static int
skipfs(FILE *fp)
{
int ch;
do {
ch = getc(fp);
} while (ch == ' ' || ch == '\t');
if (ch == '#') {
do {
ch = getc(fp);
} while (ch != EOF && ch != '\n');
}
return ch;
}
static char *
xuesc(char *buf)
{
@ -117,7 +135,7 @@ xuflds(FILE *fp, struct value values[])
if (i >= MAX_NUM_COLUMNS)
return gripe("Too many columns");
ch = getc(fp);
ch = skipfs(fp);
switch (ch) {
case EOF:
return gripe("Unexpected EOF");
@ -132,7 +150,7 @@ xuflds(FILE *fp, struct value values[])
values[i].v_type = VAL_DOUBLE;
break;
case '"':
if (fscanf(fp, "%1023[^ \n]", buf) != 1
if (fscanf(fp, "%1023[^ \t#\n]", buf) != 1
|| buf[strlen(buf)-1] != '"')
return gripe("Malformed string in field %d", i + 1);
buf[strlen(buf)-1] = '\0';
@ -144,7 +162,7 @@ xuflds(FILE *fp, struct value values[])
break;
default:
ungetc(ch, fp);
if (fscanf(fp, "%1023[^ \n]", buf) != 1 || !isalpha(buf[0])) {
if (fscanf(fp, "%1023[^ \t#\n]", buf) != 1 || !isalpha(buf[0])) {
return gripe("Junk in field %d", i + 1);
}
if (!strcmp(buf, "nil")) {
@ -159,7 +177,7 @@ xuflds(FILE *fp, struct value values[])
ch = getc(fp);
if (ch == '\n')
ungetc(ch, fp);
else if (ch != ' ')
else if (ch != ' ' && ch != '\t')
return gripe("Bad field separator after field %d", i + 1);
}
}
@ -406,7 +424,6 @@ int
xundump(FILE *fp, char *file, int expected_table)
{
char name[64];
char sep;
struct empfile *ep;
int row, res, rows, ch;
struct value values[MAX_NUM_COLUMNS + 1];
@ -419,9 +436,15 @@ xundump(FILE *fp, char *file, int expected_table)
} else
lineno++;
if (fscanf(fp, "XDUMP%*1[ ]%63[^ \n]%*1[ ]%*[^ \n]%c", name, &sep) != 2)
while ((ch = skipfs(fp)) == '\n')
lineno++;
if (ch == EOF && expected_table == EF_BAD)
return -1;
ungetc(ch, fp);
if (fscanf(fp, "XDUMP%*[ \t]%63[^ \t#\n]%*[ \t]%*[^ \t#\n]", name) != 1)
return gripe("Expected XDUMP header");
if (sep != '\n')
if (skipfs(fp) != '\n')
return gripe("Junk after XDUMP header");
type = ef_byname(name);
@ -440,7 +463,7 @@ xundump(FILE *fp, char *file, int expected_table)
for (row = 0; ; row++) {
lineno++;
ch = getc(fp);
ch = skipfs(fp);
if (ch == '/')
break;
ungetc(ch, fp);
@ -466,16 +489,16 @@ xundump(FILE *fp, char *file, int expected_table)
ch = getc(fp);
ungetc(ch, fp);
if (!isdigit(ch) || fscanf(fp, "%d%c", &rows, &sep) != 2)
if (!isdigit(ch) || fscanf(fp, "%d", &rows) != 1)
return gripe("Malformed table footer");
if (skipfs(fp) != '\n')
return gripe("Junk after table footer");
if (row != rows)
return gripe("Read %d rows, which doesn't match footer",
row);
if (fixed_rows && row != ep->csize -1)
return gripe("Table %s requires %d rows, got %d",
name, ep->csize - 1, row);
if (sep != '\n')
return gripe("Junk after table footer");
if (need_sentinel)
xuinitrow(type, row);