diff options
Diffstat (limited to 'lib/libpm.c')
| -rw-r--r-- | lib/libpm.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/lib/libpm.c b/lib/libpm.c index b27b47d5..d1fc6c42 100644 --- a/lib/libpm.c +++ b/lib/libpm.c @@ -855,6 +855,11 @@ pm_parse_width(const char * const arg) { See comments at 'validateComputableSize' in libpam.c for details on the purpose of these validations. + + This isn't just for Netpbm format images. + + Typical places from which widths come: headers of non-Netpbm images; + command line options. -----------------------------------------------------------------------------*/ unsigned int width; const char * error; @@ -901,3 +906,27 @@ pm_parse_height(const char * const arg) { +unsigned int +pm_parse_maxval(const char * const arg) { +/*---------------------------------------------------------------------------- + Same as pm_parse_width(), but for maxval. +-----------------------------------------------------------------------------*/ + unsigned int maxval; + const char * error; + + pm_string_to_uint(arg, &maxval, &error); + + if (error) { + pm_error("'%s' is invalid as a maxval. %s", arg, error); + pm_strfree(error); + } else { + if (maxval > INT_MAX-1) + pm_error("Maxval %u is too large for computations.", maxval); + if (maxval == 0) + pm_error("Maxval argument must be a positive number. You " + "specified 0."); + } + return maxval; +} + + |