sfeed

simple feed reader - forked from git.codemadness.org/sfeed
git clone git://src.gearsix.net/sfeed
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commit 59ba2ed29bcbe67de6e9ee1e7fb18744f7490c22
parent 7b2bec5985b79a73613c0858a845b97ad614794d
Author: Hiltjo Posthuma <hiltjo@codemadness.org>
Date:   Sun, 17 Jul 2022 12:46:34 +0200

sfeed_curses: cleanup code for handling read items from an URL file

This makes it easier to reuse the code from reading plain-text list of items
from a file and uses a struct urls to keep its state in a cleaner way.

+ some small code-style improvements and reshuffling.

Inspired by a question from NRK by mail about implementing a "read later"
feature.

(A quick local experiment shows it can be done in ~70 lines of added code).

Diffstat:
Msfeed_curses.c | 82+++++++++++++++++++++++++++++++++++++++++++------------------------------------
1 file changed, 45 insertions(+), 37 deletions(-)

diff --git a/sfeed_curses.c b/sfeed_curses.c @@ -129,10 +129,16 @@ struct item { off_t offset; /* line offset in file for lazyload */ }; +struct urls { + char **items; /* array of urls */ + size_t len; /* amount of items */ + size_t cap; /* available capacity */ +}; + struct items { - struct item *items; /* array of items */ - size_t len; /* amount of items */ - size_t cap; /* available capacity */ + struct item *items; /* array of items */ + size_t len; /* amount of items */ + size_t cap; /* available capacity */ }; void alldirty(void); @@ -144,9 +150,9 @@ void pane_draw(struct pane *); void sighandler(int); void updategeom(void); void updatesidebar(void); -void urls_free(void); -int urls_isnew(const char *); -void urls_read(void); +void urls_free(struct urls *); +int urls_hasmatch(struct urls *, const char *); +void urls_read(struct urls *, const char *); static struct linebar linebar; static struct statusbar statusbar; @@ -169,8 +175,8 @@ static struct feed *feeds; static struct feed *curfeed; static size_t nfeeds; /* amount of feeds */ static time_t comparetime; -static char *urlfile, **urls; -static size_t nurls; +struct urls urls; +static char *urlfile; volatile sig_atomic_t state_sigchld = 0, state_sighup = 0, state_sigint = 0; volatile sig_atomic_t state_sigterm = 0, state_sigwinch = 0; @@ -1197,9 +1203,9 @@ feed_items_get(struct feed *f, FILE *fp, struct items *itemsret) if (n <= 0 || feof(fp)) break; } - itemsret->cap = cap; itemsret->items = items; itemsret->len = nitems; + itemsret->cap = cap; free(line); } @@ -1218,7 +1224,7 @@ updatenewitems(struct feed *f) row = &(p->rows[i]); /* do not use pane_row_get() */ item = row->data; if (urlfile) - item->isnew = urls_isnew(item->matchnew); + item->isnew = !urls_hasmatch(&urls, item->matchnew); else item->isnew = (item->timeok && item->timestamp >= comparetime); row->bold = item->isnew; @@ -1264,7 +1270,7 @@ feed_count(struct feed *f, FILE *fp) parseline(line, fields); if (urlfile) { - f->totalnew += urls_isnew(fields[fields[FieldLink][0] ? FieldLink : FieldId]); + f->totalnew += !urls_hasmatch(&urls, fields[fields[FieldLink][0] ? FieldLink : FieldId]); } else { parsedtime = 0; if (!strtotime(fields[FieldUnixTimestamp], &parsedtime)) @@ -1383,9 +1389,9 @@ feeds_reloadall(void) pos = panes[PaneItems].pos; /* store numeric item position */ feeds_set(curfeed); /* close and reopen feed if possible */ - urls_read(); + urls_read(&urls, urlfile); feeds_load(feeds, nfeeds); - urls_free(); + urls_free(&urls); /* restore numeric item position */ pane_setpos(&panes[PaneItems], pos); updatesidebar(); @@ -1408,10 +1414,10 @@ feed_open_selected(struct pane *p) return; f = row->data; feeds_set(f); - urls_read(); + urls_read(&urls, urlfile); if (f->fp) feed_load(f, f->fp); - urls_free(); + urls_free(&urls); /* redraw row: counts could be changed */ updatesidebar(); updatetitle(); @@ -1901,32 +1907,34 @@ urls_cmp(const void *v1, const void *v2) return strcmp(*((char **)v1), *((char **)v2)); } -int -urls_isnew(const char *url) +void +urls_free(struct urls *urls) { - return (!nurls || - bsearch(&url, urls, nurls, sizeof(char *), urls_cmp) == NULL); + while (urls->len > 0) { + urls->len--; + free(urls->items[urls->len]); + } + urls->items = NULL; + urls->len = 0; + urls->cap = 0; } -void -urls_free(void) +int +urls_hasmatch(struct urls *urls, const char *url) { - while (nurls > 0) - free(urls[--nurls]); - free(urls); - urls = NULL; - nurls = 0; + return (urls->len && + bsearch(&url, urls->items, urls->len, sizeof(char *), urls_cmp)); } void -urls_read(void) +urls_read(struct urls *urls, const char *urlfile) { FILE *fp; char *line = NULL; - size_t linesiz = 0, cap = 0; + size_t linesiz = 0; ssize_t n; - urls_free(); + urls_free(urls); if (!urlfile) return; @@ -1936,19 +1944,19 @@ urls_read(void) while ((n = getline(&line, &linesiz, fp)) > 0) { if (line[n - 1] == '\n') line[--n] = '\0'; - if (nurls + 1 >= cap) { - cap = cap ? cap * 2 : 16; - urls = erealloc(urls, cap * sizeof(char *)); + if (urls->len + 1 >= urls->cap) { + urls->cap = urls->cap ? urls->cap * 2 : 16; + urls->items = erealloc(urls->items, urls->cap * sizeof(char *)); } - urls[nurls++] = estrdup(line); + urls->items[urls->len++] = estrdup(line); } if (ferror(fp)) die("getline: %s", urlfile); fclose(fp); free(line); - if (nurls > 0) - qsort(urls, nurls, sizeof(char *), urls_cmp); + if (urls->len > 0) + qsort(urls->items, urls->len, sizeof(char *), urls_cmp); } int @@ -2016,9 +2024,9 @@ main(int argc, char *argv[]) nfeeds = argc - 1; } feeds_set(&feeds[0]); - urls_read(); + urls_read(&urls, urlfile); feeds_load(feeds, nfeeds); - urls_free(); + urls_free(&urls); if (!isatty(0)) { if ((fd = open("/dev/tty", O_RDONLY)) == -1)