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. Add read_line() and chomp().

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. Greatly simplify parse_extension_map_file().
This commit is contained in:
Emil Mikulic 2003-11-17 12:42:42 +00:00
parent a4740dfda2
commit 813d4463bc
1 changed files with 72 additions and 33 deletions
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105
trunk/darkhttpd.c
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@ -509,48 +509,87 @@ static void parse_default_extension_map(void)
/* ---------------------------------------------------------------------------
* read_line - read a line from [fp], return its contents in a
* dynamically allocated buffer, not including the line ending.
*
* Handles CR, CRLF and LF line endings, as well as NOEOL correctly. If
* already at EOF, returns NULL. Will err() or errx() in case of
* unexpected file error or running out of memory.
*/
static char *read_line(FILE *fp)
{
char *buf;
long startpos, endpos;
size_t linelen, numread;
int c;
startpos = ftell(fp);
if (startpos == -1) err(EXIT_FAILURE, "ftell()");
/* find end of line (or file) */
linelen = 0;
for (;;)
{
c = fgetc(fp);
if (c == EOF || c == (int)'\n' || c == (int)'\r') break;
linelen++;
}
/* return NULL on EOF (and empty line) */
if (linelen == 0 && c == EOF) return NULL;
endpos = ftell(fp);
if (endpos == -1) err(EXIT_FAILURE, "ftell()");
/* skip CRLF */
if (c == (int)'\r' && fgetc(fp) == (int)'\n') endpos++;
buf = (char*)xmalloc(linelen + 1);
/* rewind file to where the line stared and load the line */
if (fseek(fp, startpos, SEEK_SET) == -1) err(EXIT_FAILURE, "fseek()");
numread = fread(buf, 1, linelen, fp);
if (numread != linelen)
errx(EXIT_FAILURE, "fread() %u bytes, expecting %u bytes",
numread, linelen);
/* terminate buffer */
buf[linelen] = 0;
/* advance file pointer over the endline */
if (fseek(fp, endpos, SEEK_SET) == -1) err(EXIT_FAILURE, "fseek()");
return buf;
}
/* ---------------------------------------------------------------------------
* Removes the ending newline in a string, if there is one.
*/
static void chomp(char *str)
{
size_t pos = strlen(str) - 1;
if ((pos >= 0) && (str[pos] == '\n')) str[pos] = '\0';
}
/* ---------------------------------------------------------------------------
* Adds contents of specified file to mime_map list.
*/
static void parse_extension_map_file(const char *filename)
{
char *buf = NULL;
char *buf;
FILE *fp = fopen(filename, "rb");
if (fp == NULL) err(1, "fopen(\"%s\")", filename);
while (!feof(fp))
while ( (buf = read_line(fp)) != NULL )
{
size_t line_len;
char c;
long filepos;
/* store current file position */
filepos = ftell(fp);
if (filepos == -1) err(1, "ftell()");
/* read to newline */
for (c=0, line_len=0;
!feof(fp) && c != '\n' && c != '\r';
c = fgetc(fp), line_len++);
/* jump back to beginning of current line */
if (fseek(fp, filepos, SEEK_SET) == -1)
err(1, "fseek()");
if (line_len-1 != 0)
{
/* alloc and fill up buf */
buf = xmalloc(line_len);
if (fread(buf, 1, line_len-1, fp) != (line_len-1))
err(1, "fread()");
buf[line_len-1] = '\0';
/* parse it */
parse_mimetype_line(buf);
free(buf);
}
c = fgetc(fp); /* read last char (newline) */
chomp(buf);
parse_mimetype_line(buf);
free(buf);
}
fclose(fp);