24 lines
1.0 KiB
Diff
24 lines
1.0 KiB
Diff
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diff --git a/analyzer/pnmpsnr.c b/analyzer/pnmpsnr.c
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index ce2708b..b04316c 100644
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--- a/analyzer/pnmpsnr.c
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+++ b/analyzer/pnmpsnr.c
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@@ -55,14 +55,14 @@ validateInput(struct pam const pam1,
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"maxval of one of them.",
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(unsigned int) pam1.maxval, (unsigned int) pam2.maxval);
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- if (streq(pam1.tuple_type, pam2.tuple_type))
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+ if (!streq(pam1.tuple_type, pam2.tuple_type))
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pm_error("images are not of the same type. The tuple types are "
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"'%s' and '%s', respectively.",
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pam1.tuple_type, pam2.tuple_type);
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- if (streq(pam1.tuple_type, PAM_PBM_TUPLETYPE) &&
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- streq(pam1.tuple_type, PAM_PGM_TUPLETYPE) &&
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- streq(pam1.tuple_type, PAM_PPM_TUPLETYPE))
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+ if (!streq(pam1.tuple_type, PAM_PBM_TUPLETYPE) &&
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+ !streq(pam1.tuple_type, PAM_PGM_TUPLETYPE) &&
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+ !streq(pam1.tuple_type, PAM_PPM_TUPLETYPE))
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pm_error("Images are not of a PNM type. Tuple type is '%s'",
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pam1.tuple_type);
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}
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