snark13
737c974400
- Split tests/ (libc feature tests) and examples/ (real apps); shared
app.mk in repo root, was examples/example.mk
- libc/io/* split into libc/{conio,env,errno,file,mouse,string,sys,
time,video}/ — clearer module boundaries
- New examples/mdview/: markdown viewer (Phases 1-5 + light nested
lists). Headers (H1-H4), HR, ulist/olist/quote with nesting via
leading spaces, fenced code blocks, inline emphasis (bold/italic/
underscore/code), wrap/unwrap mode with soft wrap (F2), horizontal
pan (← →) with '>' truncation indicator
- libc additions: scroll() in conio (ESTEX SCROLL), strlwr/strupr,
gets() test
- Makefile updates across tests/ for the new shared app.mk path
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
/*
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* filetest — exercise minimal FILE * stream API (fopen/fclose/fputs/
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* fgets/fread/fwrite/fseek/ftell/feof + stdin/stdout/stderr).
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*
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* Steps:
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* 1. fopen("FILE.TXT","w"), fputs+fputc lines, fclose.
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* 2. fopen("FILE.TXT","r"), fgets each line, fclose.
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* 3. fopen("r"), fread block, fseek, ftell, feof, fread again.
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* 4. fputs to stdout (sanity check console pseudo-stream).
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*/
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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int main(void)
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{
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const char *path = "FILE.TXT";
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/* ----- 1. Write via fputs + fputc ----- */
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{
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FILE *fp = fopen(path, "w");
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if (!fp) {
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printf("fopen(w) failed: errno=%d (%s)\n", errno, strerror(errno));
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return 1;
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}
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fputs("Hello from FILE*\n", fp);
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fputs("Second line via fputs\n", fp);
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for (int i = '0'; i <= '9'; i++) fputc(i, fp);
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fputc('\n', fp);
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if (fclose(fp) != 0) puts("fclose: error");
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}
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/* ----- 2. Read via fgets ----- */
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{
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FILE *fp = fopen(path, "r");
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if (!fp) {
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printf("fopen(r) failed: errno=%d\n", errno);
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return 1;
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}
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char buf[128];
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int n = 0;
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while (fgets(buf, sizeof buf, fp)) {
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printf(" line %d: %s", ++n, buf);
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if (buf[strlen(buf)-1] != '\n') putchar('\n');
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}
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printf(" total lines: %d, feof=%d\n", n, feof(fp));
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fclose(fp);
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}
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/* ----- 3. fread / fseek / ftell ----- */
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{
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FILE *fp = fopen(path, "r");
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if (!fp) return 1;
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char buf[16];
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size_t got = fread(buf, 1, 16, fp);
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printf(" fread(16) -> %u bytes, ftell=%ld\n",
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(unsigned)got, ftell(fp));
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if (fseek(fp, 0L, SEEK_END) == 0) {
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printf(" file size via fseek(END)+ftell = %ld\n", ftell(fp));
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}
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rewind(fp);
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printf(" rewind: ftell=%ld, feof=%d\n", ftell(fp), feof(fp));
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fclose(fp);
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}
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/* ----- 4. Console pseudo-streams ----- */
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fputs(" fputs to stdout works\n", stdout);
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fputs(" fputs to stderr works\n", stderr);
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fputc('!', stdout); fputc('\n', stdout);
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puts("filetest done.");
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return 0;
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}
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