diff options
Diffstat (limited to 'libbb/fgets_str.c')
| -rw-r--r-- | libbb/fgets_str.c | 33 |
1 files changed, 23 insertions, 10 deletions
diff --git a/libbb/fgets_str.c b/libbb/fgets_str.c index 1bc6c3b1c..d6fada1a1 100644 --- a/libbb/fgets_str.c +++ b/libbb/fgets_str.c @@ -10,10 +10,7 @@ #include "libbb.h" -/* Read up to (and including) TERMINATING_STRING from FILE and return it. - * Return NULL on EOF. */ - -char *xmalloc_fgets_str(FILE *file, const char *terminating_string) +static char *xmalloc_fgets_internal(FILE *file, const char *terminating_string, int chop_off) { char *linebuf = NULL; const int term_length = strlen(terminating_string); @@ -25,12 +22,12 @@ char *xmalloc_fgets_str(FILE *file, const char *terminating_string) while (1) { ch = fgetc(file); if (ch == EOF) { - free(linebuf); - return NULL; + if (idx == 0) + return linebuf; /* NULL */ + break; } - /* grow the line buffer as necessary */ - while (idx > linebufsz - 2) { + if (idx >= linebufsz) { linebufsz += 200; linebuf = xrealloc(linebuf, linebufsz); } @@ -40,14 +37,30 @@ char *xmalloc_fgets_str(FILE *file, const char *terminating_string) /* Check for terminating string */ end_string_offset = idx - term_length; - if (end_string_offset > 0 + if (end_string_offset >= 0 && memcmp(&linebuf[end_string_offset], terminating_string, term_length) == 0 ) { - idx -= term_length; + if (chop_off) + idx -= term_length; break; } } + /* Grow/shrink *first*, then store NUL */ linebuf = xrealloc(linebuf, idx + 1); linebuf[idx] = '\0'; return linebuf; } + +/* Read up to TERMINATING_STRING from FILE and return it, + * including terminating string. + * Non-terminated string can be returned if EOF is reached. + * Return NULL if EOF is reached immediately. */ +char *xmalloc_fgets_str(FILE *file, const char *terminating_string) +{ + return xmalloc_fgets_internal(file, terminating_string, 0); +} + +char *xmalloc_fgetline_str(FILE *file, const char *terminating_string) +{ + return xmalloc_fgets_internal(file, terminating_string, 1); +} |