{"id":27,"date":"2012-04-16T14:38:00","date_gmt":"2012-04-16T19:38:00","guid":{"rendered":"http:\/\/charles-oneill.com\/blog\/?p=27"},"modified":"2014-07-31T11:17:05","modified_gmt":"2014-07-31T16:17:05","slug":"fortran-array-reordering-utility-freo","status":"publish","type":"post","link":"https:\/\/charles-oneill.com\/blog\/fortran-array-reordering-utility-freo\/","title":{"rendered":"Fortran Array Reordering Utility (Freo)"},"content":{"rendered":"

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Fortran and C order their arrays differently. Fortran is column major; C is row major. There are performance implications to using the wrong order.<\/div>\n
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What do you do when you inherit a 10k+ line Fortran code written in C order? Regular expressions are not reliable. By-hand conversion takes too long and is fraught with human errors. So, I wrote the freo program in Scheme to flip the indicies of a specified function. Freo transposes Fortran indicies. It correctly converted the entire 12k line code in 54 files without human help in a few seconds.<\/div>\n
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Freo Converting Fortran Arrays in 4 files<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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Download exe file at: freo.exe<\/a> and .scm code at: freo.scm<\/a>. The code is not pretty and not optimal, but it does exist and does work. The code is compiled to a windows exe with Chicken Scheme<\/a>.<\/div>\n","protected":false},"excerpt":{"rendered":"

Fortran and C order their arrays differently. Fortran is column major; C is row major. There are performance implications to using the wrong order. What do you do when you inherit a 10k+ line Fortran code written in C order? Regular expressions are not reliable. By-hand conversion takes too long and is fraught with human […]<\/p>\n","protected":false},"author":1,"featured_media":58,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/charles-oneill.com\/blog\/wp-json\/wp\/v2\/posts\/27"}],"collection":[{"href":"https:\/\/charles-oneill.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/charles-oneill.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/charles-oneill.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/charles-oneill.com\/blog\/wp-json\/wp\/v2\/comments?post=27"}],"version-history":[{"count":0,"href":"https:\/\/charles-oneill.com\/blog\/wp-json\/wp\/v2\/posts\/27\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/charles-oneill.com\/blog\/wp-json\/wp\/v2\/media\/58"}],"wp:attachment":[{"href":"https:\/\/charles-oneill.com\/blog\/wp-json\/wp\/v2\/media?parent=27"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/charles-oneill.com\/blog\/wp-json\/wp\/v2\/categories?post=27"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/charles-oneill.com\/blog\/wp-json\/wp\/v2\/tags?post=27"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}