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can properly open empty and create files

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This commit is contained in:
Alessandro Mauri 2019-12-26 23:06:45 +01:00
parent b4f6124da0
commit e85314ba0e
2 changed files with 32 additions and 18 deletions
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7
doc/useful links.txt
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@ -15,4 +15,9 @@ Write a simple text editor written in pure C:
https://viewsourcecode.org/snaptoken/kilo/ https://viewsourcecode.org/snaptoken/kilo/
All C keywords: All C keywords:
https://www.programiz.com/c-programming/list-all-keywords-c-language https://www.programiz.com/c-programming/list-all-keywords-c-language
Nuklear:
https://github.com/Immediate-Mode-UI/Nuklear
https://github.com/vurtun/nuklear/wiki/Text-Edit
https://dexp.in/articles/nuklear-intro/

43
src/ste.c
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@ -359,26 +359,35 @@ void drawBar (char *s)
/* Open a file and put it into a buffer line by line */ /* Open a file and put it into a buffer line by line */
void fileOpen (char *filename) void fileOpen (char *filename)
{ {
FILE *fp = fopen(filename, "r"); FILE *fd = fopen(filename, "a+");
if (fp == NULL) die("Cannot open file", BAD_FILE); if (fd == NULL) die("Cannot open file", BAD_FILE);
/* Init the linebuffer */ /* Check if the file is empty first */
char *line = NULL; fseek (fd, 0, SEEK_END);
/* Set linecap to 0 so getline will atumatically allocate int size = ftell(fd);
* memory for the line buffer*/ if (size) {
size_t linecap = 0; rewind(fd);
ssize_t linelen;
/* getline returns -1 if no new line is present */ /* Init the linebuffer */
while ((linelen = getline(&line, &linecap, fp)) != -1) { char *line = NULL;
while (linelen > 0 && (line[linelen - 1] == '\n' || line[linelen - 1] == '\r')) /* Set linecap to 0 so getline will atumatically allocate
linelen--; * memory for the line buffer*/
rowAddLast(&rows, line, linelen); size_t linecap = 0;
ssize_t linelen;
/* getline returns -1 if no new line is present */
while ((linelen = getline(&line, &linecap, fd)) != -1) {
while (linelen > 0 && (line[linelen - 1] == '\n' || line[linelen - 1] == '\r'))
linelen--;
rowAddLast(&rows, line, linelen);
}
/* free the line buffer */
free(line);
} else {
rowAddLast(&rows, " ", 1);
} }
/* free the line buffer */
free(line);
/* close the file */ /* close the file */
fclose(fp); fclose(fd);
} }
/*------------------------------------- file operations ----------------------------------*/ /*------------------------------------- file operations ----------------------------------*/
@ -581,7 +590,7 @@ void updateInfo (void)
getmaxyx(stdscr, t.dim.y, t.dim.x); getmaxyx(stdscr, t.dim.y, t.dim.x);
t.dim.y -= 1; t.dim.y -= 1;
t.pad = decimalSize(rows.rownum - 1); t.pad = decimalSize(rows.rownum > 1 ? rows.rownum - 1 : 2);
t.dim.x -= t.pad + 1; t.dim.x -= t.pad + 1;
} }