diff options
Diffstat (limited to 'src/user/app/led/main.c')
| -rw-r--r-- | src/user/app/led/main.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/src/user/app/led/main.c b/src/user/app/led/main.c new file mode 100644 index 0000000..5e73c59 --- /dev/null +++ b/src/user/app/led/main.c @@ -0,0 +1,195 @@ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <readline.h> + +void parse_range(char *k, int *l1, int *l2) { + *l1 = 0; + *l2 = 0; + while (k[0] == ' ' || k[0] == '\t') k++; + + while (k[0] >= '0' && k[0] <= '9') { + (*l1) *= 10; + (*l1) += (k[0] - '0'); + k++; + } + if (k[0] == '-') { + k++; + while (k[0] >= '0' && k[0] <= '9') { + (*l2) *= 10; + (*l2) += (k[0] - '0'); + k++; + } + } + + if (k[0] != 0) { + *l1 = 0; + } + if (*l2 == 0) *l2 = *l1; + + if (*l1 == 0 || *l2 < *l1) { + printf("Invalid range."); + *l1 = 0; + } +} + +int main(char **args) { + int linecount; + char **lines; + int i, j; + + readline_history hist; + hist.str = 0; hist.max = 10; + + if (args[1] == 0) { + printf("Usage: %s filename\n", args[0]); + } else { + // load file + file_info info; + int e = stat(args[1], &info); + if (e == E_NOT_FOUND) { + printf("File not found. Creating new file.\n"); + linecount = 0; + lines = malloc(1 * sizeof(char*)); + lines[0] = 0; + } else if (info.type & FT_FILE) { + FILE f = open(args[1], FM_READ); + char* buff = (char*)malloc(info.size); + read(f, 0, info.size, buff); + close(f); + + // count newlines + linecount = 1; + for (i = 0; i < info.size; i++) { + if (buff[i] == '\n') linecount++; + } + lines = malloc(linecount * sizeof(char*)); + + // copy lines + i = 0; + int p = 0, l = 0; + while (i <= info.size) { + if ((i == info.size && buff[i-1] != 0) || buff[i] == '\n') { + lines[l] = malloc(i - p + 1); + for (j = 0; j < i-p; j++) lines[l][j] = buff[p+j]; + lines[l][i-p] = 0; + l++; + p = i+1; + } + i++; + } + while (l < linecount) linecount--; + + if (linecount > 0 && lines[linecount-1][0] == 0) { + free(lines[linecount-1]); + linecount--; + } + + // free buffer + free(buff); + } else { + printf("%s is not a file. Exiting.\n", args[1]); + return -1; + } + + // run + while (lines) { + printf("[%d lines] ", linecount); + char *s = freadline(term, &hist); + if (strcmp(s, "q") == 0) { + break; + } else if (strcmp(s, "l") == 0) { + for (i = 0; i < linecount; i++) { + printf("%d\t%s\n", i + 1, lines[i]); + } + } else if (s[0] == 'l') { + int l1, l2; + parse_range(s + 1, &l1, &l2); + if (l1 != 0) { + if (l2 > linecount) { + printf("There are only %d lines.\n", linecount); + } else { + for (i = l1; i <= l2; i++) { + printf("%d\t%s\n", i, lines[i-1]); + } + } + } + } else if (strcmp(s, "w") == 0) { + // calculate buffer size + int buffsz = 0; + for (i = 0; i < linecount; i++) { + buffsz += strlen(lines[i]) + 1; + } + + //write buffer + char *buff = malloc(buffsz); + char *p = buff; + for (i = 0; i < linecount; i++) { + for (j = 0; lines[i][j]; j++) { + *(p++) = lines[i][j]; + } + *(p++) = '\n'; + } + + // write buffer + FILE f = open(args[1], FM_WRITE | FM_TRUNC | FM_CREATE | FT_FILE); + if (f > 0) { + write(f, 0, buffsz, buff); + close(f); + printf("%s written, %d lines, %d characters\n", args[1], linecount, buffsz); + } else { + printf("Error %d in opening %s\n", f, args[1]); + } + free(buff); + } else if (s[0] >= '1' && s[0] <= '9') { + int line = 0; + i = 0; + while (s[i] >= '0' && s[i] <= '9') { + line *= 10; + line += (s[i] - '0'); + i++; + } + if(s[i] == ' ' || s[i] == '\t') i++; + char *nl = s + i; + + if (line < 1) { + printf("Invalid line number.\n"); + continue; + } + + if (line > linecount) { + char **lines2 = malloc(line * sizeof(char*)); + for (i = 0; i < linecount; i++) { + lines2[i] = lines[i]; + } + for (i = linecount; i < line; i++) { + lines2[i] = strdup(""); + } + free(lines); //PB + lines = lines2; + linecount = line; + } + + free(lines[line-1]); + lines[line-1] = strdup(nl); + } else if (s[0] == 'd') { + int l1, l2; + parse_range(s + 1, &l1, &l2); + if (l1 != 0) { + l1--; + for (i = l1; i < l2; i++) { + free(lines[i]); + } + for (i = l2; i < linecount; i++) { + lines[i - (l2 - l1)] = lines[i]; + } + linecount -= (l2 - l1); + } + } else { + printf("Unknown command: %s\n", s); + } + } + } + + return 0; +} |